Papers by Topan Ramadhan MS
Joint Convention Malang HAGI - IAGI - IAFMI - IATMI, 2017
Paleogene configuration of Kendeng Basin is key features for advance further exploration in this ... more Paleogene configuration of Kendeng Basin is key features for advance further exploration in this complexes geological history. Previous interpretation from geochemical data was interesting because made into 2 strucutral configuration possibility which consist of RMKS configuration and prolongation of offshore East Java structure. Based on this condition, it’s a necessary to confirm which more precise interpretation with structural feature from surface data.
This paper aims to unravel the basin configuration through Kendeng to Southern Mountain by relating the deformation regimes during Paleogene for a better understanding in recognizing Paleogene basin setting related to unexposed basement rocks beneath Kendeng and what lies behind Southern Mountain.
Many structural features such major and minor faults and fractures have been identified to classify the phases and regimes of the Paleogene-Neogene deformation. Paleogene basin configurations made into 3 interpreted lineaments with Meratus Trend : Karangsambung - Semarang – Muria line (KSM), Bayat - Bojonegoro – Bawean line (BBB),
Pacitan - Tuban – North Madura line (PTM). Paleogene structures act as the oldest analyzed after phases reconstruction in both Kendeng and Southern Mountain. These structural trend have NE-SW orientation with
extensional regime of normal-sinistral fault These evidences coincides Paleogene basin configuration in Southern Mountain and unexposed rocks beneath Kendeng did exist. As far as surface data show the Meratus Trend Lineaments in fact that these feature could be the
prolongation of the NE-SW Meratus Trend that observed clearly in the Java Sea offshore area. The structures was controlling distribution of sedimentation during Paleogene as example Ngimbang, Nanggulan and Wungkal-Gamping Formation. Conceiving these surface data will help to
reveal the basin configuration and geological conditions to form hydrocarbon play concept, even to study the basin as a consideration in the development of further exploration in Kendeng and Southern Mountain. Somehow, subsurface data is suggested to confirm these surface evidences.
PROCEEDINGS JOINT CONVENTION YOGYAKARTA 2019, HAGI – IAGI – IAFMI- IATMI, 2019
The research area in Kuningan-Cirebon Regency, West Java or Bogor Zone. Based on observations on ... more The research area in Kuningan-Cirebon Regency, West Java or Bogor Zone. Based on observations on the regional geological maps of Cirebon, West Java compiled by Silitonga, et al (1996), there is considerable geological structure in the area, which runs relatively southeast-northwest. The geological structure is a thrust fault that intercepts Tertiary rocks and becomes the boundary for dispersal of formation units in the area. Methods The research methods used to solve the problems of kinematic analysis and characteristics in the study area include direct field data acquisition, direction analysis, kinematic analysis to determine the zone of shortening axes, extensional axes and tectonic transport direction, geometry of fault, and the appearance due to the fault, both patterns relating to the role of fault in influencing geological conditions and geomorphological conditions of the study area.
The Waled thrust fault has a relatively southeast-northwest fault section showing a 33o-44o fault slope to the south-southwest. The transport tectonic direction is north-northeast of the same direction with shortening axes with a relatively subhorisontal direction as well as a relatively upright axes extension. The pattern indicated by the combination of stereographic projection of fault analysis in the study area, the presence of two kinematic fault patterns with different directions of the fault slip to the west-southwest and the northeast direction. Then, the direction of tectonic transport directed northwest and north-northeast trending, while the pattern of extension axes relatively uniform ie erect and relatively sloping shortening axes. The Waled thurst Fault has trailing imbricate fan characteristics in the thrust system (Boyer & Elliot, 1982). Manifestations of the Waled thurst Fault in the field of creeks that developed relatively directed with the same thrust fault and the unstable zone formed by the Waled thrust fault.
JURNAL TEKNOMINERAL, 2019
ABSTRAK Formasi Cijolang merupakan satuan resmi penyusun stratigrafi Cekungan Bogor. Menurut Sili... more ABSTRAK Formasi Cijolang merupakan satuan resmi penyusun stratigrafi Cekungan Bogor. Menurut Silitonga, Dkk (1996) Formasi Cijolang disusun oleh konglomerat dengan sisipan batupasir tufan. Formasi ini mengandung kepingan-kepingan fosil vertebrata serta memiliki ketebelan diperkirakan maksimal 150 meter dengan umur Pliosen. Sungai Cisanggarung pada daerah Jatimulya, Kecamatan Cidahu, Kabupaten Kuningan hingga daerah Waled, Kecamatan Waled, Kabupaten Cirebon memotong beberapa Formasi penyusun Cekungan Bogor/Jawa Utara seperti Formasi Halang, Formasi Kalibiuk dan Formasi Cijolang. Dengan kondisi tersebut mengakibatkan munculnya singkapan batuan pada dasar maupun tebing sungai. Pada singkapan yang berada di Sungai Cisanggarung dilakukan pengukuran dan pengambilan data stratigrafi terukur pada lokasi tipe batuan Formasi Cijolang untuk menentukan arus purba pengendapan litologi tersebut serta melakukan interpretasi lingkungan pengendapan Konglomerat tersebut. Hasil analisis dinamika arus purba pada konglomerat Cijolang di Sungai Cisanggarung, terdapat 5 fasies pada kolom stratigrafi penilitan, yaitu: Fasies Channel 1 (Fc 1), Fasies Channel 2 (Fc 2), Fasies Channel 3 (Fc 3), Fasies Channel Amaglamasi 4 (Fca 4), Fasies Channel Amaglamasi 5 (Fca 5). Lingkungan pengendapan dari ciri litologi berupa struktur sedimen serta terdapat arang kayu dan fosil moluska menunjukkan bahwa konglomerat Cijolang telah tersedemintasikan dari darat dan diendapkan pada daerah pasang surut (tidal) khususnya pada tidal channel. Arah umum arus purba yang didapat relatif berarah selatan ke utara. Hal itu menunjukkan energi yang berbeda-beda pada setiap channel. ABSTRACT The Cijolang Formation is an official unit composing the Bogor Basin stratigraphy. According to Silitonga, et al (1996) the Cijolang Formation was composed by conglomerates with tuffaceous sandstone insertions. This formation contains vertebrate fossil fragments and has a thickness estimated at a maximum of 150 meters with a Pliocene age. The Cisanggarung River in the Jatimulya area, Cidahu District, Kuningan Regency and Waled District, Waled District, Cirebon Regency cut some of the Bogor / North Java Basin Formation Formations such as the Halang Formation, Kalibiuk Formation and Cijolang Formation. Under these conditions resulted in the emergence of rock outcrops on the bottom or river bank. At the outcrop in the Cisanggarung River, measurements and retrieval of stratigraphic data were measured at the rock type location of the Cijolang Formation to determine the ancient flow of the lithology deposit and interpret the depositional environment of the conglomerate. The results of the analysis of ancient current dynamics in the Cijolang conglomerate in the Cisanggarung River, there are 5 facies in the stratigraphic column of the infiltration, namely: Facies Channel 1 (Fc 1), Channel 2 Facies (Fc 2), Channel 3 Facies (Fc 3), Channel Amaglamation 4 Facies (Fca 4), Amaglamation Channel 5 Facies (Fca 5). The depositional environment of lithological features in the form of sedimentary structures and the presence of wood
ITB INTERNATIONAL GEOTHERMAL WORKSHOP, 2018
In Sumenep-Madura there are 3 spot of geothermal manifestation such a hot springs. The generally ... more In Sumenep-Madura there are 3 spot of geothermal manifestation such a hot springs. The generally pattern of appearance the manifestation is located at the end of the anticline limb which is the axis direction of folds relative East-West. The Physiographic of Sumenep-Madura area is a part of Rembang zone. Based on lithological association of the research area is composed of sedimentary rocks from the foreland basin or a part of the North East Java Basin. From the background by tectonic setting and geologic conditions developed from Paleogene-Recent in the research area, the Geothermal System manifested is not influence by volcanic activity. North East Java Basin is a basin formed by the extension regime that produces Rifting Basin. The accumulates sediment material continuously resulting loading to produce a geopressured system of the basin. Therefore, the fluid contained in the rock formations be warm up due to the system. Based on geological data of surface deformation occurring in research area are included in the Rembang anticlinorium zone where the folding pattern is influenced by the positive flower structure deformation pattern, which is a structure that develops above the basement fault based on the observation of the subsurface seismic. Then, by surface (morphology) ridge folds pattern distribution that's showing east-west trend or called as the RMKS (Rembang-Madura-Kangean-Sakala) fault zone by subsurface data. The mechanism and kinematics of the positive flower structure pattern becomes the plane of accommodates the migration of geothermal fluid based on geometry of structure that through to the basement. Therefore, by existing mechanism the control a formation of geothermal manifestation is influenced by the pressure gradient where is associated with the sedimentary basin. Then, the positive flower structure pattern becomes the controller of the migration path and fluid transfer to the reservoir rock (Madura formation) in near surface.
The Sumatra fault is a large fault where its existence extends from NW-SE as a series of fault zo... more The Sumatra fault is a large fault where its existence extends from NW-SE as a series of fault zones that move right slip (dextral). Where one segment that is in the Lubuk Sikaping region experiencing interesting structure phenomenon, while at the same time formed transtension and transpession stress, resulted in the formed of graben and mountains. So from it then conducted a research to determine the cause of the formed of these structural conditions so that later expect ed to give input to the tectonic structures in Sumatra. The method used is satellite image observation, structural analysis and observation of regional geological data. Based on the results of observation and analysis in general the Sumatra fault segment Lubuk Sikaping entered into transtentional duplex (Putra and Sidqi, 2017), which has a dextral kinematic following the Sumatra fault with 3 main structures. With the orientation of N 340 o E from structural data with relative NE-SW stress following the riedle shear pattern of the main structure. Based on geological map observation, Lubuk Sikaping segment fault cuts the pre-tertiary to tertiary rocks caused rock formations in it to uplift (pop-up) as a result of the transpression stress so that formed hills in the middle of the fault segment and otherwise formed depression zone as a result of transtension stress to form Rau graben and Panyambungan graben. This condition is influenced by the formed of duplex structure in Lubuk Sikaping fault caused the formed of both stress at the same time. The duplex structure in the research area is caused by the fault condition that is in the form of step over as a result of the meet of two faults in the north and south area. So it can be concluded that the duplex structure in the Lubuk Sikaping fault segment in addition to transtension stress also undergoes transpression, where both are formed and work simultaneously resulted in a sequence of pop-up thrusting structures in the central area of the fault.
Paleogene configuration of Kendeng Basin is key features for advance further exploration in this ... more Paleogene configuration of Kendeng Basin is key features for advance further exploration in this complexes geological history. Previous interpretation from geochemical data was interesting because made into 2 strucutral configuration possibility which consist of RMKS configuration and prolongation of offshore East Java structure. Based on this condition, it’s a necessary to confirm which more precise interpretation with structural feature from surface data. This paper aims to unravel the basin configuration through Kendeng to Southern Mountain by relating the deformation regimes during Paleogene for a better understanding in recognizing Paleogene basin setting related to unexposed basement rocks beneath Kendeng and what lies behind Southern Mountain. Many structural features such major and minor faults and fractures have been identified to classify the phases and regimes of the Paleogene-Neogene deformation. Paleogene basin configurations made into 3 interpreted lineaments with Meratus Trend : Karangsambung - Semarang – Muria line (KSM), Bayat - Bojonegoro –
Bawean line (BBB), Pacitan - Tuban – North Madura line (PTM). Paleogene structures act as the oldest analyzed after phases reconstruction in both Kendeng and Southern Mountain. These structural trend have NE-SW orientation with extensional regime of normal-sinistral fault These evidences coincides Paleogene basin configuration in Southern Mountain and unexposed rocks beneath Kendeng did exist. As far as surface data show the Meratus Trend Lineaments in fact that these feature could be the prolongation of the NE-SW Meratus Trend that observed clearly in the Java Sea offshore area. The structures was controlling distribution of sedimentation during Paleogene as example Ngimbang, Nanggulan and Wungkal-Gamping Formation. Conceiving these surface data will help to reveal the basin configuration and geological conditions to form hydrocarbon play concept, even to study the basin as a consideration in the development of further exploration in Kendeng and Southern Mountain. Somehow, subsurface data is suggested to confirm these surface evidences.
Keyword : Paleogene, Kendeng, Structure
Seminar Nasional Kebumian XII - FTM - UPN Veteran Yogyakarta, 2017
The depotitional of many materials is deposited in several sedimentary environments such as the l... more The depotitional of many materials is deposited in several sedimentary environments such as the land environment, transition to the sea. Glagah Beach, Temon Sub-district, Kulon Progo Regency, Special Region Yogyakarta and several other beaches deposited sedimentary sediment materials where the material may be derived from fluvial processes, marine processes or aeolian processes (wind). In determining the mechanism and settling environment, how many physical parameters of sediment to interpret the characteristics of sedimentary environment such as sediment structure and sediment texture. To fulfill these parameters descriptions and stratigraphic stratigraphy measurements in the field were then presented in sedimentary sedimentation columns and categorized in several bed sets of sedimentation. In addition to physical parameters, there are also supporting parameters such as geomorphology and current analysis to determine the direction of precipitation. From 5 locations of sedimentological data collection, there were grouping of bed sets such as planar bedding, flaser bedding, cross bedding on canal or channel which is an association of sedimentation structure of tidal settlement in the intertidal section. The material is deposited with medium to high energy mechanism with the bed load current from the overall general direction relative south-southeast with the medium (fluid) of water transport. With the data is also supported the location of research areas located in the coast of South Java and around the mouth of Kali (river) Serang.
ABSTRAK Pengendapan material banyak diendapkan di beberapa lingkungan pengendapan diantaranya yang umum adalah lingkungan darat, transisi hingga laut. Pantai Glagah, Kecamatan Temon, Kabupaten Kulon Progo, Daerah Istimewa Yogyakarta dan beberapa pantai lainnya banyak mengendapkan material-material endapan sedimen dimana material tersebut kemungkinan berasal dari proses fluvial, proses marine ataupun proses aeolian (angin). Dalam penentuan mekanisme serta lingkungan pengendapan dilakukan berapa parameter fisik sedimen untuk interpretasi karakteristik lingkungan pengendapan seperti struktur sedimen dan tekstur sedimen. Untuk memenuhi parameter tersebut dilakukan deskripsi dan pengukuran stratigrafi endapan dilapangan lalu disajikan dalam kolom sedimentologi endapan dan mengelompokan dalam beberapa bed set sedimentasi. Selain adanya parameter fisik, juga adanya parameter pendukung seperti geomorfologi dan analisis arus untuk menentukan arah pengendapan. Dari 5 lokasi pengambilan data sedimentologi didapatkan pengelompokan bed set seperti planar bedding, flaser bedding, cross bedding pada kanal atau channel yang merupakan asosiasi dari struktur sedimentasi pengendapan lingkungan pasang surut pada bagian intertidal. Material di endapkan dengan mekanisme energi sedang hingga tinggi dengan arus bed load dari arah umum keseluruhan relatif selatan-tenggara dengan media (fluida) transportasi berupa air. Dengan data tersebut juga didukung letak daerah penelitian yang berada di pesisir pantai Selatan Jawa dan tepat di sekitar muara Kali Serang. Kata kunci: Pantai Glagah, Pasang surut, Pasir pantai, Muara sungai Serang I. PENDAHULUAN Indonesia memiliki iklim tropis sehingga banyak menghasilkan material-material rombakan melalui proses degradasi seperti pelapukan, erosi dan trasportasi. Selain adanya proses degradasi terdapat juga proses agradasi dimana terjadi proses pengendapan dari proses-proses degradasi. Pengendapan material-material tersebut banyak diendapkan di beberapa lingkungan pengendapan diantaranya yang umum adalah lingkungan darat, transisi hingga laut. Bentuklahan yang banyak ditemukan endapan sedimen
The study area is located in the Buntok town which is administratively a capital Dusun Selatan di... more The study area is located in the Buntok town which is administratively a capital Dusun Selatan district as well the capital of South Barito regency, Central Kalimantan Province. Flooding always being yearly problematic disaster significantly happens, this has an impact on social aspects, but particularly impact on infrastructure development problems. Geological investigations should be conducted by means of geological mapping with analysis of geomorphology and hydrology as well. Based on the investigation it was found that the Buntok town is situated by young sediment fraction predominantly fine grain. In addition, from the manual analysis of coring obtained multiple layers that show the ancient flood sediment. Geomorphological analysis shows the city area Buntok is situated in the Flood Plain landform unit on Barito drainage basin (DAS) with an average elevation of 1-2 meters above sea level. As well as on the analysis of aerial photographs shows the presence of ancient Barito river flow patterns that head to giving area. Based on a series of investigations it is known that the study area is currently included in the flood-prone area with high intensity that the relocation of the urban area to a safer area is assumedly needed. Keyword: study environmental geology, flood disaster mitigation, buntok town, barito drainage basin
Daerah penelitian berada di kota Buntok secara administratif merupakan ibukota kecamatan Dusun Selatan sekaligus ibukota Kabupaten Barito Selatan, Provinsi Kalimantan Tengah. Daerah penilitian sering mengalami bencana banjir yang cukup signifikan, selain berdampak pada sosial tetapi sering berdampak pada permasalahan pembangunan infrastruktur. Maka perlu dilakukan penyelidikan geologi dengan pemetaan geologi serta analisis geomorfologi serta hidrologi dimana data menunjukan kota Buntok disusun oleh endapan muda dengan fraksi butir dominan halus. Selain itu juga dalam analisis manual coring didapatkan beberapa lapisan menunjukan endapan banjir purba. Selain itu analisis geomorfologi menunjukan wilayah kota Buntok termasuk dalam unit bentuklahan Dataran Banjir pada Daerah Aliran Sungai (DAS) Barito dengan elevasi rata-rata 1-2 mdpl serta dari analisis foto udara menunjukan adanya pola aliran purba sungai Barito yang mengarah kewilayah kota. Sehingga data tersebut menunjukan bahwa kawasan kota saat ini memiliki resiko kawasan banjir yang sangat besar sehingga perlua danya relokasi wilayah perkotaan kekawasan yang lebih aman. Kata kunci: kajian geologi lingkungan, mitigasi banjir, kota buntok, daerah aliran sungai barito
SEMINAR NASIONAL KEBUMIAN KE 9 Universitas Gadjah Mada
Berdasarkan kondisi suatu gunungapi purba saat ini sulit dikenali secara langsung suatu kenampaka... more Berdasarkan kondisi suatu gunungapi purba saat ini sulit dikenali secara langsung suatu kenampakannya, seperti dalam kompleks pegunungan Kulon Progo. Berdasarkan aktivitas gunungapi menghasilkan material seperti lava, lahar, material piroklastik, dll. Selain itu proses magmatisme menghasilkan banyak potensi seperti potensi mineralisasi. Untuk identifikasi suatu gunung api purba dan fasisesnya dapat menggunakan pendekatan analisis geomorfologi, asosiasi litologi gunungapi, struktur-struktur geologi pada batuan formasi Andesit Tua (Rahardjo, dkk, 1977). Penyelidikan yang dilakukan dengan metode pemetaan geologi, analisis petrografi batuan gunungapi, analisis stratigrafi, pola struktur-struktur vulkanik, serta arus purba sehingga didapatkan hasil fasies gunungapi daerah sekitar, arah aliran purba material gunungapi. Daerah Pripih, Kecamatan Kokap, Kabupaten Kulon Progo, Daerah Istimewa Yogyakarta diidentifikasikan merupakan daerah fasies pusat hingga proksimal dari gunungapi purba, dan berdasarkan Bronto,S (2013) termasuk dalam kompleks gunung api purba Ijo. Sehingga data tersebut juga dapat berimplikasi terhadap sumberdaya geologi seperti potensi mineralisasi dan bahan galian. Kata kunci: fasies gunungapi purba, Gunung Ijo, Kulon Progo.
Drafts by Topan Ramadhan MS
Peta Lintasan & Lokasi Pengamatan
BAB I PENDAHULUAN Geologi merupakan sebuah bidang ilmu pengetahuan tentang kebumian yang mengenai... more BAB I PENDAHULUAN Geologi merupakan sebuah bidang ilmu pengetahuan tentang kebumian yang mengenai segala proses ataupun komponen yang ada. Dalam perkembangannya, ilmu geologi cukup berkembang berdasarkan penemuan-penemuan yang didapatkan dalam sebuah penelitian. Peran ahli geologi dibutuhkan dalam memberikan informasi baik berupa data baru, sumbangan pemikiran serta alternatif dan solusi dalam pemecahan suatu permasalahan yang ada. Salah satu kompetensi ahli geologi yang diperlukaan sekurang-kurangnya mampu melakukan pembuatan peta geologi baik dimulai dari pengambilan data lapangan, pengolahan dan analisis data lapangan serta menyimpulkan suatu kondisi geologi pada suatu daerah penelitian lewat sebuah laporan penelitian seperti dalam bentuk peta geologi. Suatu kegiatan penelitian geologi seperti dalam bentuk melakukan pemetaan geologi merupakan upaya ahli geologi dalam mempelajari kondisi geologi daerah penelitian sekurang-kurangnya meliputi kajian geomorfologi, stratigrafi, dan struktur geologi serta sejarah geologi untuk memberikan informasi kebumian. Dengan mengetahui kondisi geologinya, maka dapat memberikan informasi potensi sumberdaya alam yang terdapat di suatu daerah penelitian yang selanjutnya dapat dimanfaatkan untuk kesejahteraan manusia. Sehingga, seorang ahli geologi perlu langsung ke lapangan untuk mengamati atau melakukan observasi secara langsung mengenai kondisi geologi suatu daerah. Observasi
TIDAK DI PUBLIKASIKAN, 2018
Daerah penelitian berada di Desa Waled dan sekitarnya Kecamatan Waled, Kabupaten Cirebon, Provins... more Daerah penelitian berada di Desa Waled dan sekitarnya Kecamatan Waled, Kabupaten Cirebon, Provinsi Jawa Barat. Tujuan penelitian adalah untuk mengetahui kondisi geologi permukaan mencakup aspek geomorfologi, stratigrafi dan struktur geologi dan pada akhirnya dapat digunakan untuk menentukan sejarah geologi daerah penelitian serta mengenai geologi lingkungannya. Selain itu, untuk mengetahui kinematik dan karakteristik Sesar Naik Waled daerah Waled dan Sekitarnya, Kecamatan Waled, Kabupaten Cirebon, Provinsi Jawa Barat. Metode penelitian yang digunakan yaitu melakukan pemetaan geologi di lapangan serta didukung dengan analisis laboratorium seperti analisis petrografi, mikropaleontologi dan struktur geologi. Geomorfologi daerah penelitian terdapat beberapa subsatuan geomorfik di antaranya, subsatuan geomorfik perbukitan lipatan komplek berlereng landai hingga curam terdenudasi (S21), subsatuan geomorfik perbukitan tuf berlereng landai hingga agak curam terdenudasi (D1), subsatuan geomorfik dataran aluvial (F1) dan subsatuan geomorfik tubuh sungai (F2). Pola pengaliran sungai yang berkembang berupa paralel, rectangular dan trellis, dengan stadia daerah dewasa menuju tua. Stratigrafi daerah penelitian terdiri dari 7 satuan batuan yaitu satuan batulempung Pemali, satuan batulempung Halang, satuan batupasir Halang Gununghurip, satuan batupasir Kalibiuk, satuan konglomerat Cijolang, satuan tuf Gintung dan endapan campuran. Struktur geologi yang berkembang di daerah penelitian yaitu, Antiklin Cikeusal, Sinklin Cikeusik, Sinklin Kananga, Sesar Naik Waled, dan Sesar Naik Cimahi, Sesar Mendatar Cisanggarung, Sesar Mendatar Ambit dan Sesar Mendatar Cihoe. Sesumber geologi daerah penelitian berupa sumber daya air, sumber daya lahan, bahan galian, dan potensi geowisata. Bencana geologi berupa tanah longsor, banjir dan kekeringan. Hasil analisis Sesar Naik Waled memiliki arah bidang sesar relatif tenggara-baratlaut dengan slip dominan relatif naik. Sesar Naik Waled memiliki geometri kurang lebih 9 km pada daerah penelitian. Berdasarkan kondisi tersebut, diketahui bahwa daerah penelitian tersusun oleh satuan batuan berumur Miosen Bawah hingga Holosen (saat ini). Deformasi yang terjadi sebanyak 2 kali yaitu petama pada Kala post-Pliosen Tengah dan kedua pada Kala post-Pleistosen.
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Papers by Topan Ramadhan MS
This paper aims to unravel the basin configuration through Kendeng to Southern Mountain by relating the deformation regimes during Paleogene for a better understanding in recognizing Paleogene basin setting related to unexposed basement rocks beneath Kendeng and what lies behind Southern Mountain.
Many structural features such major and minor faults and fractures have been identified to classify the phases and regimes of the Paleogene-Neogene deformation. Paleogene basin configurations made into 3 interpreted lineaments with Meratus Trend : Karangsambung - Semarang – Muria line (KSM), Bayat - Bojonegoro – Bawean line (BBB),
Pacitan - Tuban – North Madura line (PTM). Paleogene structures act as the oldest analyzed after phases reconstruction in both Kendeng and Southern Mountain. These structural trend have NE-SW orientation with
extensional regime of normal-sinistral fault These evidences coincides Paleogene basin configuration in Southern Mountain and unexposed rocks beneath Kendeng did exist. As far as surface data show the Meratus Trend Lineaments in fact that these feature could be the
prolongation of the NE-SW Meratus Trend that observed clearly in the Java Sea offshore area. The structures was controlling distribution of sedimentation during Paleogene as example Ngimbang, Nanggulan and Wungkal-Gamping Formation. Conceiving these surface data will help to
reveal the basin configuration and geological conditions to form hydrocarbon play concept, even to study the basin as a consideration in the development of further exploration in Kendeng and Southern Mountain. Somehow, subsurface data is suggested to confirm these surface evidences.
The Waled thrust fault has a relatively southeast-northwest fault section showing a 33o-44o fault slope to the south-southwest. The transport tectonic direction is north-northeast of the same direction with shortening axes with a relatively subhorisontal direction as well as a relatively upright axes extension. The pattern indicated by the combination of stereographic projection of fault analysis in the study area, the presence of two kinematic fault patterns with different directions of the fault slip to the west-southwest and the northeast direction. Then, the direction of tectonic transport directed northwest and north-northeast trending, while the pattern of extension axes relatively uniform ie erect and relatively sloping shortening axes. The Waled thurst Fault has trailing imbricate fan characteristics in the thrust system (Boyer & Elliot, 1982). Manifestations of the Waled thurst Fault in the field of creeks that developed relatively directed with the same thrust fault and the unstable zone formed by the Waled thrust fault.
Bawean line (BBB), Pacitan - Tuban – North Madura line (PTM). Paleogene structures act as the oldest analyzed after phases reconstruction in both Kendeng and Southern Mountain. These structural trend have NE-SW orientation with extensional regime of normal-sinistral fault These evidences coincides Paleogene basin configuration in Southern Mountain and unexposed rocks beneath Kendeng did exist. As far as surface data show the Meratus Trend Lineaments in fact that these feature could be the prolongation of the NE-SW Meratus Trend that observed clearly in the Java Sea offshore area. The structures was controlling distribution of sedimentation during Paleogene as example Ngimbang, Nanggulan and Wungkal-Gamping Formation. Conceiving these surface data will help to reveal the basin configuration and geological conditions to form hydrocarbon play concept, even to study the basin as a consideration in the development of further exploration in Kendeng and Southern Mountain. Somehow, subsurface data is suggested to confirm these surface evidences.
Keyword : Paleogene, Kendeng, Structure
ABSTRAK Pengendapan material banyak diendapkan di beberapa lingkungan pengendapan diantaranya yang umum adalah lingkungan darat, transisi hingga laut. Pantai Glagah, Kecamatan Temon, Kabupaten Kulon Progo, Daerah Istimewa Yogyakarta dan beberapa pantai lainnya banyak mengendapkan material-material endapan sedimen dimana material tersebut kemungkinan berasal dari proses fluvial, proses marine ataupun proses aeolian (angin). Dalam penentuan mekanisme serta lingkungan pengendapan dilakukan berapa parameter fisik sedimen untuk interpretasi karakteristik lingkungan pengendapan seperti struktur sedimen dan tekstur sedimen. Untuk memenuhi parameter tersebut dilakukan deskripsi dan pengukuran stratigrafi endapan dilapangan lalu disajikan dalam kolom sedimentologi endapan dan mengelompokan dalam beberapa bed set sedimentasi. Selain adanya parameter fisik, juga adanya parameter pendukung seperti geomorfologi dan analisis arus untuk menentukan arah pengendapan. Dari 5 lokasi pengambilan data sedimentologi didapatkan pengelompokan bed set seperti planar bedding, flaser bedding, cross bedding pada kanal atau channel yang merupakan asosiasi dari struktur sedimentasi pengendapan lingkungan pasang surut pada bagian intertidal. Material di endapkan dengan mekanisme energi sedang hingga tinggi dengan arus bed load dari arah umum keseluruhan relatif selatan-tenggara dengan media (fluida) transportasi berupa air. Dengan data tersebut juga didukung letak daerah penelitian yang berada di pesisir pantai Selatan Jawa dan tepat di sekitar muara Kali Serang. Kata kunci: Pantai Glagah, Pasang surut, Pasir pantai, Muara sungai Serang I. PENDAHULUAN Indonesia memiliki iklim tropis sehingga banyak menghasilkan material-material rombakan melalui proses degradasi seperti pelapukan, erosi dan trasportasi. Selain adanya proses degradasi terdapat juga proses agradasi dimana terjadi proses pengendapan dari proses-proses degradasi. Pengendapan material-material tersebut banyak diendapkan di beberapa lingkungan pengendapan diantaranya yang umum adalah lingkungan darat, transisi hingga laut. Bentuklahan yang banyak ditemukan endapan sedimen
Daerah penelitian berada di kota Buntok secara administratif merupakan ibukota kecamatan Dusun Selatan sekaligus ibukota Kabupaten Barito Selatan, Provinsi Kalimantan Tengah. Daerah penilitian sering mengalami bencana banjir yang cukup signifikan, selain berdampak pada sosial tetapi sering berdampak pada permasalahan pembangunan infrastruktur. Maka perlu dilakukan penyelidikan geologi dengan pemetaan geologi serta analisis geomorfologi serta hidrologi dimana data menunjukan kota Buntok disusun oleh endapan muda dengan fraksi butir dominan halus. Selain itu juga dalam analisis manual coring didapatkan beberapa lapisan menunjukan endapan banjir purba. Selain itu analisis geomorfologi menunjukan wilayah kota Buntok termasuk dalam unit bentuklahan Dataran Banjir pada Daerah Aliran Sungai (DAS) Barito dengan elevasi rata-rata 1-2 mdpl serta dari analisis foto udara menunjukan adanya pola aliran purba sungai Barito yang mengarah kewilayah kota. Sehingga data tersebut menunjukan bahwa kawasan kota saat ini memiliki resiko kawasan banjir yang sangat besar sehingga perlua danya relokasi wilayah perkotaan kekawasan yang lebih aman. Kata kunci: kajian geologi lingkungan, mitigasi banjir, kota buntok, daerah aliran sungai barito
Drafts by Topan Ramadhan MS
This paper aims to unravel the basin configuration through Kendeng to Southern Mountain by relating the deformation regimes during Paleogene for a better understanding in recognizing Paleogene basin setting related to unexposed basement rocks beneath Kendeng and what lies behind Southern Mountain.
Many structural features such major and minor faults and fractures have been identified to classify the phases and regimes of the Paleogene-Neogene deformation. Paleogene basin configurations made into 3 interpreted lineaments with Meratus Trend : Karangsambung - Semarang – Muria line (KSM), Bayat - Bojonegoro – Bawean line (BBB),
Pacitan - Tuban – North Madura line (PTM). Paleogene structures act as the oldest analyzed after phases reconstruction in both Kendeng and Southern Mountain. These structural trend have NE-SW orientation with
extensional regime of normal-sinistral fault These evidences coincides Paleogene basin configuration in Southern Mountain and unexposed rocks beneath Kendeng did exist. As far as surface data show the Meratus Trend Lineaments in fact that these feature could be the
prolongation of the NE-SW Meratus Trend that observed clearly in the Java Sea offshore area. The structures was controlling distribution of sedimentation during Paleogene as example Ngimbang, Nanggulan and Wungkal-Gamping Formation. Conceiving these surface data will help to
reveal the basin configuration and geological conditions to form hydrocarbon play concept, even to study the basin as a consideration in the development of further exploration in Kendeng and Southern Mountain. Somehow, subsurface data is suggested to confirm these surface evidences.
The Waled thrust fault has a relatively southeast-northwest fault section showing a 33o-44o fault slope to the south-southwest. The transport tectonic direction is north-northeast of the same direction with shortening axes with a relatively subhorisontal direction as well as a relatively upright axes extension. The pattern indicated by the combination of stereographic projection of fault analysis in the study area, the presence of two kinematic fault patterns with different directions of the fault slip to the west-southwest and the northeast direction. Then, the direction of tectonic transport directed northwest and north-northeast trending, while the pattern of extension axes relatively uniform ie erect and relatively sloping shortening axes. The Waled thurst Fault has trailing imbricate fan characteristics in the thrust system (Boyer & Elliot, 1982). Manifestations of the Waled thurst Fault in the field of creeks that developed relatively directed with the same thrust fault and the unstable zone formed by the Waled thrust fault.
Bawean line (BBB), Pacitan - Tuban – North Madura line (PTM). Paleogene structures act as the oldest analyzed after phases reconstruction in both Kendeng and Southern Mountain. These structural trend have NE-SW orientation with extensional regime of normal-sinistral fault These evidences coincides Paleogene basin configuration in Southern Mountain and unexposed rocks beneath Kendeng did exist. As far as surface data show the Meratus Trend Lineaments in fact that these feature could be the prolongation of the NE-SW Meratus Trend that observed clearly in the Java Sea offshore area. The structures was controlling distribution of sedimentation during Paleogene as example Ngimbang, Nanggulan and Wungkal-Gamping Formation. Conceiving these surface data will help to reveal the basin configuration and geological conditions to form hydrocarbon play concept, even to study the basin as a consideration in the development of further exploration in Kendeng and Southern Mountain. Somehow, subsurface data is suggested to confirm these surface evidences.
Keyword : Paleogene, Kendeng, Structure
ABSTRAK Pengendapan material banyak diendapkan di beberapa lingkungan pengendapan diantaranya yang umum adalah lingkungan darat, transisi hingga laut. Pantai Glagah, Kecamatan Temon, Kabupaten Kulon Progo, Daerah Istimewa Yogyakarta dan beberapa pantai lainnya banyak mengendapkan material-material endapan sedimen dimana material tersebut kemungkinan berasal dari proses fluvial, proses marine ataupun proses aeolian (angin). Dalam penentuan mekanisme serta lingkungan pengendapan dilakukan berapa parameter fisik sedimen untuk interpretasi karakteristik lingkungan pengendapan seperti struktur sedimen dan tekstur sedimen. Untuk memenuhi parameter tersebut dilakukan deskripsi dan pengukuran stratigrafi endapan dilapangan lalu disajikan dalam kolom sedimentologi endapan dan mengelompokan dalam beberapa bed set sedimentasi. Selain adanya parameter fisik, juga adanya parameter pendukung seperti geomorfologi dan analisis arus untuk menentukan arah pengendapan. Dari 5 lokasi pengambilan data sedimentologi didapatkan pengelompokan bed set seperti planar bedding, flaser bedding, cross bedding pada kanal atau channel yang merupakan asosiasi dari struktur sedimentasi pengendapan lingkungan pasang surut pada bagian intertidal. Material di endapkan dengan mekanisme energi sedang hingga tinggi dengan arus bed load dari arah umum keseluruhan relatif selatan-tenggara dengan media (fluida) transportasi berupa air. Dengan data tersebut juga didukung letak daerah penelitian yang berada di pesisir pantai Selatan Jawa dan tepat di sekitar muara Kali Serang. Kata kunci: Pantai Glagah, Pasang surut, Pasir pantai, Muara sungai Serang I. PENDAHULUAN Indonesia memiliki iklim tropis sehingga banyak menghasilkan material-material rombakan melalui proses degradasi seperti pelapukan, erosi dan trasportasi. Selain adanya proses degradasi terdapat juga proses agradasi dimana terjadi proses pengendapan dari proses-proses degradasi. Pengendapan material-material tersebut banyak diendapkan di beberapa lingkungan pengendapan diantaranya yang umum adalah lingkungan darat, transisi hingga laut. Bentuklahan yang banyak ditemukan endapan sedimen
Daerah penelitian berada di kota Buntok secara administratif merupakan ibukota kecamatan Dusun Selatan sekaligus ibukota Kabupaten Barito Selatan, Provinsi Kalimantan Tengah. Daerah penilitian sering mengalami bencana banjir yang cukup signifikan, selain berdampak pada sosial tetapi sering berdampak pada permasalahan pembangunan infrastruktur. Maka perlu dilakukan penyelidikan geologi dengan pemetaan geologi serta analisis geomorfologi serta hidrologi dimana data menunjukan kota Buntok disusun oleh endapan muda dengan fraksi butir dominan halus. Selain itu juga dalam analisis manual coring didapatkan beberapa lapisan menunjukan endapan banjir purba. Selain itu analisis geomorfologi menunjukan wilayah kota Buntok termasuk dalam unit bentuklahan Dataran Banjir pada Daerah Aliran Sungai (DAS) Barito dengan elevasi rata-rata 1-2 mdpl serta dari analisis foto udara menunjukan adanya pola aliran purba sungai Barito yang mengarah kewilayah kota. Sehingga data tersebut menunjukan bahwa kawasan kota saat ini memiliki resiko kawasan banjir yang sangat besar sehingga perlua danya relokasi wilayah perkotaan kekawasan yang lebih aman. Kata kunci: kajian geologi lingkungan, mitigasi banjir, kota buntok, daerah aliran sungai barito