https://jgsm.geologi.esdm.go.id/index.php/JGSM/issue/feed 2026-03-23T22:43:14+00:00 Sekretariat Redaksi Jurnal Geologi dan Sumberdaya Mineral redaksipsg@gmail.com Open Journal Systems <p><strong>Jurnal Geologi dan Sumberdaya Mineral (Journal of Geology and Mineral Resources)</strong> is an Indonesian scientific journal published by the Center for Geological Survey, Geological Agency, Ministry of Energy and Mineral Resources. The journal receives Indonesian or English articles. Those articles are selected and reviewed by our professional editors and peer reviewers.</p> <p>JGSM has been assigned as an Accredited Scientific Periodical Magazine by the Indonesian Institute of Sciences (LIPI) No. 596/Akred/P2MI-LIPI/03/2015 in 2015, followed by Kementerian Riset dan Teknologi / Badan Riset dan Inovasi Nasional No. 200/M/KPT/2020 in 2020. The journal is indexed in <a title="portal_garuda_IPI" href="http://id.portalgaruda.org/?ref=browse&amp;mod=viewjournal&amp;journal=10104" target="_blank" rel="noopener">Indonesian Publication Index (IPI)</a>, <a title="isjd" href="http://isjd.pdii.lipi.go.id/index.php/public_no_login/index_direktori" target="_blank" rel="noopener">Indonesian Scientific Journal Database (ISJD)</a>, <a href="http://dx.doi.org/10.33332">Digital Object Identifier (DOI)</a> and <a title="google_scholar" href="https://scholar.google.co.id/citations?user=nXMHIYUAAAAJ&amp;hl=en" target="_blank" rel="noopener">Google Scholar</a>, the contents are freely available in electronic version. JGSM is published quarterly in February, May, August, and November.</p> <p><a title="issn" href="http://issn.pdii.lipi.go.id/issn.cgi?daftar&amp;1402376294&amp;1&amp;&amp;" target="_blank" rel="noopener"><strong>ISSN : 0853-9634 (print)</strong></a></p> <p><a title="eissn" href="http://issn.pdii.lipi.go.id/issn.cgi?daftar&amp;1485227549&amp;1&amp;&amp;" target="_blank" rel="noopener"><strong>e-ISSN : 2549-4759 (online)</strong></a></p> <p><strong><em><strong>DOI Prefix: </strong></em><a title="JGSM" href="https://doi.org/10.33332">https://doi.org/10.33332</a><br /></strong></p> https://jgsm.geologi.esdm.go.id/index.php/JGSM/article/view/945 2026-02-26T05:20:28+00:00 Sultan Ahmad Syarifuddin sultanahmad.sya@gmail.com Suharsono Suharsono harsonomgl@upnyk.ac.id Iqbal Takodama iqbal.takodama@esdm.go.id

<p><em>The Mount Tampomas Geothermal Area is located in Sumedang Regency, West Java Province. This study aims to interpret the distribution of subsurface fault structures based on gravity data analysis over an area of 14 × 14 km². Residual gravity anomaly analysis reveals the presence of a low gravity anomaly in the central part of the volcanic edifice, which is interpreted as a low-density zone associated with a magma ascent pathway within the volcanic system. The results of derivative analysis, correlated with surface geological data, indicate the presence of fault structures comprising normal faults, strike-slip faults, and reverse faults, which represent structural patterns predominantly controlled by volcanic activity. Forward modelling applied to several profiles yields the subsurface lithological density distribution, including the Subang Formation (2.40 g/cm³), Kaliwangu Formation (2.35 g/cm³), old volcanic lahar breccia (2.85 g/cm³), undifferentiated volcaniclastic tuffaceous sand (2.55 g/cm³), pumiceous tuff (2.60 g/cm³), breccia and agglomerate (2.70 g/cm³), and young volcanic lava (2.50 g/cm³).The results of this study provide a preliminary characterization of subsurface fault structures in the Mount Tampomas Geothermal Area based on gravity methods.</em></p> <p><em><strong>Keywords</strong> : Gravity, Geothermal, Tampomas, Derivative </em><br /><em>Analysis, Forward Modelling</em></p>

2026-02-28T00:00:00+00:00 Copyright (c) 2026 Sultan Ahmad Syarifuddin, Suharsono, Iqbal Takodama