GEOLOGI DAN MINERALISASI BIJIH LOGAM DASAR TIPE URAT EPITERMAL DI BUONGBARU KABUPATEN TANA TIDUNG PROPINSI KALIMANTAN TIMUR

• المؤلفون الرئيسيون: , Sartini Djimar, , Dr.-rer.nat. Arifudin Idrus, ST., MT
• التنسيق: Theses and Dissertations NonPeerReviewed
• منشور في: [Yogyakarta] : Universitas Gadjah Mada 2011
• الموضوعات: ETD
• الوصول للمادة أونلاين: https://repository.ugm.ac.id/97616/; http://etd.ugm.ac.id/index.php?mod=penelitian_detail&sub=PenelitianDetail&act=view&typ=html&buku_id=53593
• المؤسسة: Universitas Gadjah Mada

The aim of this study is to obtain geological conditions and characteristics of the geochemistry mineralization and physico-chemical conditions for the formation of base metal deposit with reference to analysis of the thin section, polish section, chemical analysis consist of x-ray diffraction, fluorescence of X rays and fluid inclusions. Study area is located in the Boungbaru village, Sesayap Hilir district, Tanah Tidung regency, East Kalimantan province in license of mineral exploration of the PT. Buana Galasi. Topography in the study area are form undulating and hilly undulating morphology. Result of petrography analysis showed the basic rocks consist of silisified andesite and breccias, these can be grouped into three rocks unit based on their megascopic physical appearance, (1) Tuff units, (2) Andesite unit and (3) Dacite unit. In the study area there are very intensive join structure and spread evenly so that the prospects for medium-metallic mineral mineralization Hydrothermal alteration can be grouped into three zones, from the inside to outside include: (1) silica ± clay (advanced argillic), (2) argillic and (3) propylitic. Characteristics of base metal deposits are mineralization, hydrothermal alteration, texture / structure of the quartz veins also physical-chemical properties of the precipitate formed. Field observations and hand specimens samples showed the quartz veins and silisified rocks containing sulfide minerals which are dominated by pyrite (FeS2), chalcopyrite (CuFeS2), galena (PbS) and spalerite (Zn,Fe)S that act as a source of zink (Zn). The results of geochemical analysis from the company also support the exitence of anomalous elements Au, Ag, Cu, Pb, and Zn. Results of geochemical analysis by surface geological data in the study site and the data of petrographic analysis, fluid inclusion and geochemical data based on samples of mineral vein / rock, it can be concluded that the base metal deposits in temperature of 210-300 ° C.