Geology and surface hydrothermal alteration of Malabar area, northern part of the Wayang Windu Geothermal Field, Indonesia

Arif Susanto, Noriyoshi Tsuchiya, Emmy Suparka, Nobuo Hirano, Atsushi Kishita, Yudi Indra Kusumah

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Citations (Scopus)

Abstract

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.

Original languageEnglish
Title of host publicationGeothermal Resources Council Annual Meeting 2011, Geothermal 2011
Pages1029-1031
Number of pages3
Publication statusPublished - 2011 Dec 1
EventGeothermal Resources Council Annual Meeting 2011, Geothermal 2011 - San Diego, CA, United States
Duration: 2011 Oct 232011 Oct 26

Publication series

NameTransactions - Geothermal Resources Council
Volume35 2
ISSN (Print)0193-5933

Other

OtherGeothermal Resources Council Annual Meeting 2011, Geothermal 2011
CountryUnited States
CitySan Diego, CA
Period11/10/2311/10/26

Keywords

  • Geology
  • Geothermal
  • Hydrothermal alteration
  • Malabar
  • Petrography
  • Wayang Windu
  • Xrd

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Geophysics

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