The main aim of this study was to outline the lithium anomalies by a regional exploration, at an ... more The main aim of this study was to outline the lithium anomalies by a regional exploration, at an area of 7800 km2, in Semnan province (north central Iran) using the Staged Factor Analysis (SFA) and Spectrum-Area (S-A) fractal model based on stream sediments and rock samples. Results derived via the SFA denote that Li was located in a factor as F2-4 with B, Cs, U and Rb which was utilized for calculation of the threshold values by the S-A method. The F2-4 data were classified by the fractal model for determination of the Li anomalies. Main anomaly for F2-4≥ 1.5 was situated in the SW and northern parts of this region. Furthermore, Li high grades of rock samples were correlated with main F2-4 anomalies. The main anomalies were correlated with geological particulars of Li mineralization types which represent that the main F2-4 anomalies associate with volcanic and tuff units in the SW part, and overlapped with clay minerals in the northern sector of this region. On the other hand, ther...
In this research, we try to study the sedimentary characteristics and the trend of textural chang... more In this research, we try to study the sedimentary characteristics and the trend of textural changes in the sediments of the Jajrood River from upstream to downstream at the point of junction to Latiyan dam. Based on the textural changes of sediments along the path from the upstream in the Garmabdar area to the downstream to the Latiyan Dam, the Jajrood River is divided into four A, B, C and D basins. Twenty sediment samples were collected and all sieved by dry and wet method also the specimens were morphoscopically studied. Data from field and laboratory phases were combined and interpreted using reliable scientific sources and finally a detailed summary was obtained regarding sedimentology of the study area. Mineralogically, the sediment type of the river is a clastic carbonate sedimentary type with fragments ranging from 30 to 58 percent and rock fragments between 25 to 50 percent abundance. Other minerals, such as feldspar minerals, account for about 1 to 4 percent, quartz 5 to 1...
To understand microfacies, depositional environment and geochemistry of Upper Permian rocks in Al... more To understand microfacies, depositional environment and geochemistry of Upper Permian rocks in Alborz region, the type sections of Ruteh Formation were studied. During the Permian, the Alborz region was a part of the east-west trending Paleotethys sea. Stratigraphic studies indicate that the Ruteh Formation in Ruteh section is composed of thin to massive limestone, argillaceous limestone interbedded with shale, is overlain by distinct laterite horizon of the Elika Formation and is underlain by the disconformity by the Dorud Formation. Facies analysis and petrographic studies led to the recognition of 11 microfacies in Ruteh section. These facies were deposited in 4 facies belts such as tidal flat, lagoon, shoal and open marine sub-environment. The Permian calcareous algae in the Ruteh Formation are widespread and well documented to determine the environment and microfacies of Permian deposits. Cementation and dolomitization are the main diagenetic processes in Ruteh Formation. Based...
The South Pars gas field is one of the Southwestern fields of Iran in Zagros sedimentary basin an... more The South Pars gas field is one of the Southwestern fields of Iran in Zagros sedimentary basin and consists of two Kangan and Dalan reservoirs. The Kangan and Dalan Formations belong to Dehram Group and are the most important gas reservoirs in Persian Gulf area. ...
The Dalichai Formation is the first rock unit of the Middle Jurassic in the Alborz sedimentary ba... more The Dalichai Formation is the first rock unit of the Middle Jurassic in the Alborz sedimentary basin that has occurred in a marine environment. The boundary of the Dalichai formation with Shemshak Formation is erosional unconformable while it is concordant with Lar formation. Due to lithological similarity, the boundary of the Dalichai formation with the Lar formation is unclear. It is also very difficult to identify the primary carbonates mineralogy, due to the effects of diagenetic processes solely on the basis of petrographic studies. We studied a section of Sharaf mountain with a thickness of 1420m and 149 samples was studied. The study of the major and minor elements, the Oxygen and Carbon isotopes, and plotting of these values against each other represents that the Dalichai formation have had original aragonite mineralogy, and the nonmarine diagenesis have had the highest impact on them. Plotting the Sr/Ca ratio versus Mn value, shows that these carbonates are affected in a ...
Garmsar plain is one of the central desert sub-basins in Semnan province with a warm and dry dese... more Garmsar plain is one of the central desert sub-basins in Semnan province with a warm and dry desert climate. After the HablehRood River, which is the main source of surface water of the area, the groundwater resources of Garmsar plain have a vital role in supplying agricultural and industrial demands; hence, the quality assessment of the groundwater is very important since it has a very great impact on the environment. This study aims to analyze the water quality of the area and determine the effects of geological formations on the hydrochemical deterioration of the groundwater quality in the area. To this aim, the hydrochemical environment of the region was simulated using Qa.Aq, Rockwors16, and GIS10.1 using the upstream of the basin chemical water and groundwater hydrochemistry data, the Garmsar study area was simulated. Besides, mineral saturation indices, hydrochemical water facies, and the total amount of soluble materials were determined, and the diagram of one or more effect...
The Dorood oilfield is located offshore in the northern part of the Persian Gulf. It partly under... more The Dorood oilfield is located offshore in the northern part of the Persian Gulf. It partly underlies the Kharg Island. The Neocomian Fahliyan Formation represents the high-quality reservoir in the oilfield. It includes five carbonate members: The Manifa, Middle and Upper Yamama, Khami and Lower Ratawi. The Fahliyan Formation in the studied well attains a thickness of 378.1 m and mainly consists of thin-bedded limestones. It unconformably overlies the evaporate Hith Formation and conformably underlies the Gadvan Formation. An integrated biostratigraphic (benthic foraminifera and algae) and lithostratigraphic study is presented. Paleontological studies led to the identification of 19 genera and 29 species of benthic foraminifera and 10 genera and 9 species of calcareous algae. Two biozones of Berriasian through Valanginian age have been recognized. These are Lithocodium aggregatum-Salpingoporella muehlbergii assemblage zone (Valanginian) and Pseudocyclammina lituus- Coscinoconus asse...
Erosion, sediment transport, sedimentation and water quality are very important issues in watersh... more Erosion, sediment transport, sedimentation and water quality are very important issues in watershed management. Based on the initial study, it was found that the three factors of geological materials, slope, and climate are the most important factors in erosion. Therefore, these three factors were examined and combined to create work units. Then, the qualitative sensitivity of the rocks and pre-Quaternary formations was continually determined using the criteria of resistance method and hardness of the rock mass in a field method. Then, several statistical regression models were investigated by discharge classification and temporal separation of data; and by establishing a regression relation between flow discharge and sediment discharge data and its simulation, sedimentation rating curves along with FAO and USBR were presented based on the error least squares method according to statistical analysis methods, and annual long run suspended sediment load values were estimated by combin...
Journal of Stratigraphy and Sedimentology Researches, 2016
Introduction The Cretaceous successions of the Arabian plate host main hydrocarbon reserves of th... more Introduction The Cretaceous successions of the Arabian plate host main hydrocarbon reserves of the world and the Middle East. The Arabian plate had experienced particular sedimentary circumstances in the early Cretaceous so that the shape of sedimentary basin had drastically changed by salt diapirs movements and basement tectonics. However, these conditions caused creation and development of intrashelf basins in this time interval. The two main and well-known intrashelf basins are Bob basin and Kazhdumi basin which are respectively located in the northeast and the east of the Arabian plate. This study has focused on the Aptian sediments which are known by the term "Dariyan Formation" in the northern of the Persian Gulf. The study outlines the extension of the Aptian intrashelf basin in northern Fars platform within the structural Zagros zone. Material and Methods The Dariyan Formation was studied in detail by using thin sections which are prepared from cores and cut...
The Early Triassic Kangan Formation is a mixed carbonate-evaporite succession that is considered ... more The Early Triassic Kangan Formation is a mixed carbonate-evaporite succession that is considered to be part of the largest carbonate gas reservoir in the Persian Gulf region. This stratigraphic succession is characterized by alternating limestone, dolostone, evaporite and shale that have been investigated in terms of evaporite facies characteristics in the Iranian offshore area. The main body of Kangan carbonates was deposited in a shallow-marine, restricted carbonate ramp platform, and underwent intense near-surface diagenesis and minor burial modification. Evaporitic facies consist of anhydrite, secondary anhydrite after gypsum, and mixed carbonate-evaporite, which are dominant in the different parts of Kangan Formation, as result of arid climate and abrupt eustatic sea level changes. This article focuses on the evaporite successions, in which diverse evaporitic lithofacies have been recognized that can be categorized in two main classes: (1) carbonate-dominated facies with evapor...
How to cite Complete issue More information about this article Journal's homepage in redalyc... more How to cite Complete issue More information about this article Journal's homepage in redalyc.org Scientific Information System Network of Scientific Journals from Latin America, the Caribbean, Spain and Portugal Non-profit academic project, developed under the open access initiative Zamannejad et al.540
The main aim of this study was to outline the lithium anomalies by a regional exploration, at an ... more The main aim of this study was to outline the lithium anomalies by a regional exploration, at an area of 7800 km2, in Semnan province (north central Iran) using the Staged Factor Analysis (SFA) and Spectrum-Area (S-A) fractal model based on stream sediments and rock samples. Results derived via the SFA denote that Li was located in a factor as F2-4 with B, Cs, U and Rb which was utilized for calculation of the threshold values by the S-A method. The F2-4 data were classified by the fractal model for determination of the Li anomalies. Main anomaly for F2-4≥ 1.5 was situated in the SW and northern parts of this region. Furthermore, Li high grades of rock samples were correlated with main F2-4 anomalies. The main anomalies were correlated with geological particulars of Li mineralization types which represent that the main F2-4 anomalies associate with volcanic and tuff units in the SW part, and overlapped with clay minerals in the northern sector of this region. On the other hand, ther...
In this research, we try to study the sedimentary characteristics and the trend of textural chang... more In this research, we try to study the sedimentary characteristics and the trend of textural changes in the sediments of the Jajrood River from upstream to downstream at the point of junction to Latiyan dam. Based on the textural changes of sediments along the path from the upstream in the Garmabdar area to the downstream to the Latiyan Dam, the Jajrood River is divided into four A, B, C and D basins. Twenty sediment samples were collected and all sieved by dry and wet method also the specimens were morphoscopically studied. Data from field and laboratory phases were combined and interpreted using reliable scientific sources and finally a detailed summary was obtained regarding sedimentology of the study area. Mineralogically, the sediment type of the river is a clastic carbonate sedimentary type with fragments ranging from 30 to 58 percent and rock fragments between 25 to 50 percent abundance. Other minerals, such as feldspar minerals, account for about 1 to 4 percent, quartz 5 to 1...
To understand microfacies, depositional environment and geochemistry of Upper Permian rocks in Al... more To understand microfacies, depositional environment and geochemistry of Upper Permian rocks in Alborz region, the type sections of Ruteh Formation were studied. During the Permian, the Alborz region was a part of the east-west trending Paleotethys sea. Stratigraphic studies indicate that the Ruteh Formation in Ruteh section is composed of thin to massive limestone, argillaceous limestone interbedded with shale, is overlain by distinct laterite horizon of the Elika Formation and is underlain by the disconformity by the Dorud Formation. Facies analysis and petrographic studies led to the recognition of 11 microfacies in Ruteh section. These facies were deposited in 4 facies belts such as tidal flat, lagoon, shoal and open marine sub-environment. The Permian calcareous algae in the Ruteh Formation are widespread and well documented to determine the environment and microfacies of Permian deposits. Cementation and dolomitization are the main diagenetic processes in Ruteh Formation. Based...
The South Pars gas field is one of the Southwestern fields of Iran in Zagros sedimentary basin an... more The South Pars gas field is one of the Southwestern fields of Iran in Zagros sedimentary basin and consists of two Kangan and Dalan reservoirs. The Kangan and Dalan Formations belong to Dehram Group and are the most important gas reservoirs in Persian Gulf area. ...
The Dalichai Formation is the first rock unit of the Middle Jurassic in the Alborz sedimentary ba... more The Dalichai Formation is the first rock unit of the Middle Jurassic in the Alborz sedimentary basin that has occurred in a marine environment. The boundary of the Dalichai formation with Shemshak Formation is erosional unconformable while it is concordant with Lar formation. Due to lithological similarity, the boundary of the Dalichai formation with the Lar formation is unclear. It is also very difficult to identify the primary carbonates mineralogy, due to the effects of diagenetic processes solely on the basis of petrographic studies. We studied a section of Sharaf mountain with a thickness of 1420m and 149 samples was studied. The study of the major and minor elements, the Oxygen and Carbon isotopes, and plotting of these values against each other represents that the Dalichai formation have had original aragonite mineralogy, and the nonmarine diagenesis have had the highest impact on them. Plotting the Sr/Ca ratio versus Mn value, shows that these carbonates are affected in a ...
Garmsar plain is one of the central desert sub-basins in Semnan province with a warm and dry dese... more Garmsar plain is one of the central desert sub-basins in Semnan province with a warm and dry desert climate. After the HablehRood River, which is the main source of surface water of the area, the groundwater resources of Garmsar plain have a vital role in supplying agricultural and industrial demands; hence, the quality assessment of the groundwater is very important since it has a very great impact on the environment. This study aims to analyze the water quality of the area and determine the effects of geological formations on the hydrochemical deterioration of the groundwater quality in the area. To this aim, the hydrochemical environment of the region was simulated using Qa.Aq, Rockwors16, and GIS10.1 using the upstream of the basin chemical water and groundwater hydrochemistry data, the Garmsar study area was simulated. Besides, mineral saturation indices, hydrochemical water facies, and the total amount of soluble materials were determined, and the diagram of one or more effect...
The Dorood oilfield is located offshore in the northern part of the Persian Gulf. It partly under... more The Dorood oilfield is located offshore in the northern part of the Persian Gulf. It partly underlies the Kharg Island. The Neocomian Fahliyan Formation represents the high-quality reservoir in the oilfield. It includes five carbonate members: The Manifa, Middle and Upper Yamama, Khami and Lower Ratawi. The Fahliyan Formation in the studied well attains a thickness of 378.1 m and mainly consists of thin-bedded limestones. It unconformably overlies the evaporate Hith Formation and conformably underlies the Gadvan Formation. An integrated biostratigraphic (benthic foraminifera and algae) and lithostratigraphic study is presented. Paleontological studies led to the identification of 19 genera and 29 species of benthic foraminifera and 10 genera and 9 species of calcareous algae. Two biozones of Berriasian through Valanginian age have been recognized. These are Lithocodium aggregatum-Salpingoporella muehlbergii assemblage zone (Valanginian) and Pseudocyclammina lituus- Coscinoconus asse...
Erosion, sediment transport, sedimentation and water quality are very important issues in watersh... more Erosion, sediment transport, sedimentation and water quality are very important issues in watershed management. Based on the initial study, it was found that the three factors of geological materials, slope, and climate are the most important factors in erosion. Therefore, these three factors were examined and combined to create work units. Then, the qualitative sensitivity of the rocks and pre-Quaternary formations was continually determined using the criteria of resistance method and hardness of the rock mass in a field method. Then, several statistical regression models were investigated by discharge classification and temporal separation of data; and by establishing a regression relation between flow discharge and sediment discharge data and its simulation, sedimentation rating curves along with FAO and USBR were presented based on the error least squares method according to statistical analysis methods, and annual long run suspended sediment load values were estimated by combin...
Journal of Stratigraphy and Sedimentology Researches, 2016
Introduction The Cretaceous successions of the Arabian plate host main hydrocarbon reserves of th... more Introduction The Cretaceous successions of the Arabian plate host main hydrocarbon reserves of the world and the Middle East. The Arabian plate had experienced particular sedimentary circumstances in the early Cretaceous so that the shape of sedimentary basin had drastically changed by salt diapirs movements and basement tectonics. However, these conditions caused creation and development of intrashelf basins in this time interval. The two main and well-known intrashelf basins are Bob basin and Kazhdumi basin which are respectively located in the northeast and the east of the Arabian plate. This study has focused on the Aptian sediments which are known by the term "Dariyan Formation" in the northern of the Persian Gulf. The study outlines the extension of the Aptian intrashelf basin in northern Fars platform within the structural Zagros zone. Material and Methods The Dariyan Formation was studied in detail by using thin sections which are prepared from cores and cut...
The Early Triassic Kangan Formation is a mixed carbonate-evaporite succession that is considered ... more The Early Triassic Kangan Formation is a mixed carbonate-evaporite succession that is considered to be part of the largest carbonate gas reservoir in the Persian Gulf region. This stratigraphic succession is characterized by alternating limestone, dolostone, evaporite and shale that have been investigated in terms of evaporite facies characteristics in the Iranian offshore area. The main body of Kangan carbonates was deposited in a shallow-marine, restricted carbonate ramp platform, and underwent intense near-surface diagenesis and minor burial modification. Evaporitic facies consist of anhydrite, secondary anhydrite after gypsum, and mixed carbonate-evaporite, which are dominant in the different parts of Kangan Formation, as result of arid climate and abrupt eustatic sea level changes. This article focuses on the evaporite successions, in which diverse evaporitic lithofacies have been recognized that can be categorized in two main classes: (1) carbonate-dominated facies with evapor...
How to cite Complete issue More information about this article Journal's homepage in redalyc... more How to cite Complete issue More information about this article Journal's homepage in redalyc.org Scientific Information System Network of Scientific Journals from Latin America, the Caribbean, Spain and Portugal Non-profit academic project, developed under the open access initiative Zamannejad et al.540
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