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Geology and surface hydrothermal alteration of Malabar area, northern part of the Wayang Windu Geothermal Field, Indonesia
Susanto A.a,b, Tsuchiya N.a, Suparka E.b, Hirano N.a, Kishita A.a, Kusumah Y.I.c
a Graduate School of Environmental Studies, Tohoku University, Japan
b Faculty of Earth Sciences and Technology, Institute of Technology Bandung, Indonesia
c Star Energy Geothermal (Wayang Windu) Ltd., Indonesia
[vc_row][vc_column][vc_row_inner][vc_column_inner][vc_separator css=”.vc_custom_1624529070653{padding-top: 30px !important;padding-bottom: 30px !important;}”][/vc_column_inner][/vc_row_inner][vc_row_inner layout=”boxed”][vc_column_inner width=”3/4″ css=”.vc_custom_1624695412187{border-right-width: 1px !important;border-right-color: #dddddd !important;border-right-style: solid !important;border-radius: 1px !important;}”][vc_empty_space][megatron_heading title=”Abstract” size=”size-sm” text_align=”text-left”][vc_column_text]The Wayang Windu Geothermal Field is situated in the West Java province of Indonesia. Geological field surveys were conducted in the Malabar area of the field to characterize distribution of rock units, geological structures, hydrothermal alteration and geothermal manifestations. Geological features and surface hydrothermal manifestations could indicate an extension of geothermal potential in northward from the developed area. Rock samples were collected from surface and subjected to petrographic observations and X-ray diffraction analyses. The volcanic stratigraphy consists of four units, from oldest to youngest. There are: Pangalengan Volcanogenic Deposits Unit, Old Malabar Volcanic Unit, Young Malabar Volcanic Unit, and Andesite Intrusion Unit. Geologic structures developed in the Malabar area include brecciation, fractured zone, normal fault and dextral strike-slip faults trending NE and NW. Geothermal manifestations include fumaroles at Kawah Burung-1 and Kawah Burung-2, hotsprings at Kawah Burung-3, H 2S gas emissions and altered ground. The hydrothermal alteration is spatially associated with faults and fractures. The alteration is characterized by the occurrence of secondary cristobalite, tridymite, quartz, alunite, natroalunite, montmorilonite, halloysite, kaolinite, pyrophyllite, muscovite, calcite, chlorite, epidote, zeolite, pyrite, and iron oxide.[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Author keywords” size=”size-sm” text_align=”text-left”][vc_column_text]Geothermal,Hydrothermal alterations,Malabar,Wayang Windu,XRD[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Indexed keywords” size=”size-sm” text_align=”text-left”][vc_column_text]Geology,Geothermal,Hydrothermal alteration,Malabar,Petrography,Wayang Windu,Xrd[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Funding details” size=”size-sm” text_align=”text-left”][vc_column_text][/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”DOI” size=”size-sm” text_align=”text-left”][vc_column_text][/vc_column_text][/vc_column_inner][vc_column_inner width=”1/4″][vc_column_text]Widget Plumx[/vc_column_text][/vc_column_inner][/vc_row_inner][/vc_column][/vc_row][vc_row][vc_column][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][/vc_column][/vc_row]