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All Journal Jurnal Geologi dan Sumberdaya Mineral (Journal of Geology and Mineral Resources)
Isnu Hajar Sulistyawan, Isnu Hajar
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Education Energy Engineering Environmental Science

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MAGMATISME, SUMBERDAYA MINERAL DAN ENERGI DI TAPANULI SELATAN-SUMATERA UTARA Sulistyawan, Isnu Hajar; Harahap, Bhakti Hamonangan
Jurnal Geologi dan Sumberdaya Mineral Vol 23, No 3 (2013): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

The result of geological survey in Tapanuli Selatan indicates that there are a relationship between magmatism process and the possibility of mineral and energy occurences. Field observation and supported with laboratory analysis showing some mineral occurs in the area i.e. gold, base metal (Cu, Pb, Zn), zeolit, kaolin, andesitic lava dan tras. Multiple intrusions may control the occurrence of base metals and gold resources and the eruption of some volcanoes was producing another mineral resources. Resources of geothermal also found in Sipirok as another implication of volcanic process in Tapanuli Selatan area. It may related to the activity of Mount Sibualbuali in the past. Occurs as the effect of heat release from the magmatism process, hydrocarbon of Barumun Basin and some layers of coal has found in this area. High calori of coal was occurs in a thin layer of Sihapas Formation.Keywords : magmatism, resources, minerals, hydrocarbon, geothermal
Karakteristik dan Sebaran Mineralisasi Logam Mulia dan Logam Dasar di Wilayah Kabupaten Sanggau, Kalimantan Barat Sulistyawan, Isnu Hajar
Jurnal Geologi dan Sumberdaya Mineral Vol 18, No 4 (2017): Jurnal Geologi dan Sumberdaya Mineral
Publisher : Pusat Survei Geologi

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Abstract

Sanggau and surrounding areas are geologically have various of the type and age of rocks. Therefore, this study is aimed to explore the possible influence of the diversity of geological conditions on mineralization occurring in this region, especially concerning the presence of metal minerals. As an implementation, geological surveys consist of field observations and laboratory analysis have been conducted to determine the chemical characteristics of mineralization occurring in the region. The Atomic Absorbtion Spectrometry method was chosen to determine the content of each element of base metal and precious metal contained in the rock in the region. From the analysis results it is known that there is a tendency of distribution of elementary metal elements and precious metal elements scattered in different areas. The Late Oligocene-Early Miocene Sintang Intrusive rocks are generally exposed in the northern part of the research area, in which by the chemical analysis contains more dominant elements which are associated with precious metals such as Cu and Au. While in the southern research area which is generally occupied by the Cretaceous Granodiorite Mensibau Intrusive Rocks based on chemical analysis, containing the elements associated with base metals such as Pb and Zn. This pattern shows that both types and age of different intrusive rocks bring different mineralized products.Keywords : base metal, precious metal, intrusive, mineralisation
Co-Authors Bhakti Hamonangan Harahap, Bhakti Hamonangan