Spatial data analysis and integration for regional-scale geothermal potential mapping, West Java, Indonesia

Carranza, Emmanuel John M., Wibowo, Hendro, Barritt, Sally D., and Sumintadireja, Prihadi (2008) Spatial data analysis and integration for regional-scale geothermal potential mapping, West Java, Indonesia. Geothermics, 37 (3). pp. 267-299.

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Abstract

Conceptual modeling and predictive mapping of potential for geothermal resources at the regional-scale in West Java are supported by analysis of the spatial distribution of geothermal prospects and thermal springs, and their spatial associations with geologic features derived from publicly available regional-scale spatial data sets. Fry analysis shows that geothermal occurrences have regional-scale spatial distributions that are related to Quaternary volcanic centers and shallow earthquake epicenters. Spatial frequency distribution analysis shows that geothermal occurrences have strong positive spatial associations with Quaternary volcanic centers, Quaternary volcanic rocks, quasi-gravity lows, and NE-, NNW-,WNW-trending faults. These geological features, with their strong positive spatial associations with geothermal occurrences, constitute spatial recognition criteria of regional-scale geothermal potential in a study area. Application of data-driven evidential belief functions in GIS-based predictive mapping of regional-scale geothermal potential resulted in delineation of high potential zones occupying 25% of West Java, which is a substantial reduction of the search area for further exploration of geothermal resources. The predicted high potential zones delineate about 53–58% of the training geothermal areas and 94% of the validated geothermal occurrences. The results of this study demonstrate the value of regional-scale geothermal potential mapping in: (a) data-poor situations, such as West Java, and (b) regions with geotectonic environments similar to the study area.

Item ID: 27366
Item Type: Article (Research - C1)
ISSN: 1879-3576
Keywords: gravity lows; fry analysis; spatial association analysis; evidential belief functions; Geographic Information Systems (GIS); West Java; Indonesia
Date Deposited: 13 Jun 2013 04:00
FoR Codes: 04 EARTH SCIENCES > 0403 Geology > 040399 Geology not elsewhere classified @ 50%
01 MATHEMATICAL SCIENCES > 0103 Numerical and Computational Mathematics > 010399 Numerical and Computational Mathematics not elsewhere classified @ 50%
SEO Codes: 85 ENERGY > 8501 Energy Exploration > 850102 Geothermal Exploration @ 100%
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