Airborne magnetic and radiometric datasets have, over the past few years, become powerful tools i... more Airborne magnetic and radiometric datasets have, over the past few years, become powerful tools in the identification of porphyry systems which may host economic porphyry copper–gold–molybdenum ore bodies. Magnetisation contrasts with the unaltered host rocks, coupled with the elevated radiometric signature, compared to the host rock, makes identification of large-scale porphyry copper systems possible. Integrating these two different datasets with stream sediment data and other geochemical exploration methods results in a higher degree of confidence. Stream sediment data were analysed to see the distribution of copper and gold elements throughout the study area, located within the Eastern Papuan Peninsula of Papua New Guinea. Airborne geophysics data over the same area were also processed for magnetic and radiometric responses. The processing of the magnetic data revealed several magnetic anomalies related to concealed intrusive rock units, with associated radiometric signatures. T...
Four Schlumberger resistivity soundings were conducted at the Talasea (Garua) geothermal field as... more Four Schlumberger resistivity soundings were conducted at the Talasea (Garua) geothermal field as a preliminary study by the Mineral Resources Authority to test whether the ABEM Terrameter SAS1000 resistivity equipment would be able to detect geoelectric layers corresponding to geothermal activity. The resistivity data were processed by Interpex IX1D program using onedimensional (1D) inversion to model the vertical variations of subsurface resistivity at depths of less than 200 m. The data were interpreted to show four geoelectric layers: a top thin layer of varying resistivity values (17 to 688 Ωm) interpreted as a mixture of volcanic sediments comprising of gravel, sand, silt, ash and clay; a second layer of moderately low resistivity values (20-50 Ωm) comparable to moderately altered volcanic sediments whose conductivity is due to pore fluid conduction, ; a third layer has anomalously very low resistivity of ≤2 Ωm and is related to low temperature (50-200°C) alteration in the sme...
Geothermal manifestations on West New Britain Province (WNBP), Papua New Guinea, are structurally... more Geothermal manifestations on West New Britain Province (WNBP), Papua New Guinea, are structurally controlled by N-S and trending structures. While these structures may be visually mapped on the ground, others occur within thick sedimentary and volcanic sequence cover, and are not easily detectable. Here we explore the application of radar imagery and seismicity to trace geothermal manifestations to structural trends and faults. The Mineral Resources Authority conducted a geothermal sampling program in West New Britain, whereby at least 30 geothermal features were sampled for their water, gas and rock samples. Analytical results obtained from these samples identified several neutral-chloride mature geothermal fields that have the potential to be developed for geothermal energy. However, given the areal extent of some of the geothermal fields and difficulty in accessing them, it appears that a large number of features remain unidentified, may never be sampled, and their geothermal cha...
Airborne magnetic and radiometric datasets have, over the past few years, become powerful tools i... more Airborne magnetic and radiometric datasets have, over the past few years, become powerful tools in the identification of porphyry systems which may host economic porphyry copper–gold–molybdenum ore bodies. Magnetisation contrasts with the unaltered host rocks, coupled with the elevated radiometric signature, compared to the host rock, makes identification of large-scale porphyry copper systems possible. Integrating these two different datasets with stream sediment data and other geochemical exploration methods results in a higher degree of confidence. Stream sediment data were analysed to see the distribution of copper and gold elements throughout the study area, located within the Eastern Papuan Peninsula of Papua New Guinea. Airborne geophysics data over the same area were also processed for magnetic and radiometric responses. The processing of the magnetic data revealed several magnetic anomalies related to concealed intrusive rock units, with associated radiometric signatures. T...
Four Schlumberger resistivity soundings were conducted at the Talasea (Garua) geothermal field as... more Four Schlumberger resistivity soundings were conducted at the Talasea (Garua) geothermal field as a preliminary study by the Mineral Resources Authority to test whether the ABEM Terrameter SAS1000 resistivity equipment would be able to detect geoelectric layers corresponding to geothermal activity. The resistivity data were processed by Interpex IX1D program using onedimensional (1D) inversion to model the vertical variations of subsurface resistivity at depths of less than 200 m. The data were interpreted to show four geoelectric layers: a top thin layer of varying resistivity values (17 to 688 Ωm) interpreted as a mixture of volcanic sediments comprising of gravel, sand, silt, ash and clay; a second layer of moderately low resistivity values (20-50 Ωm) comparable to moderately altered volcanic sediments whose conductivity is due to pore fluid conduction, ; a third layer has anomalously very low resistivity of ≤2 Ωm and is related to low temperature (50-200°C) alteration in the sme...
Geothermal manifestations on West New Britain Province (WNBP), Papua New Guinea, are structurally... more Geothermal manifestations on West New Britain Province (WNBP), Papua New Guinea, are structurally controlled by N-S and trending structures. While these structures may be visually mapped on the ground, others occur within thick sedimentary and volcanic sequence cover, and are not easily detectable. Here we explore the application of radar imagery and seismicity to trace geothermal manifestations to structural trends and faults. The Mineral Resources Authority conducted a geothermal sampling program in West New Britain, whereby at least 30 geothermal features were sampled for their water, gas and rock samples. Analytical results obtained from these samples identified several neutral-chloride mature geothermal fields that have the potential to be developed for geothermal energy. However, given the areal extent of some of the geothermal fields and difficulty in accessing them, it appears that a large number of features remain unidentified, may never be sampled, and their geothermal cha...
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