Formation of epizonal gold mineralization within the Latimojong Metamorphic Complex, Sulawesi, Indonesia: Evidence from mineralogy, fluid inclusions and Raman spectroscopy
| Autor: | Frank Melcher, Andy Yahya Al Hakim, Walter Prochaska, Gerd Rantitsch, Ronald J. Bakker |
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| Rok vydání: | 2018 |
| Předmět: |
Mineral
010504 meteorology & atmospheric sciences Metamorphic rock Geochemistry Mineralogy Geology engineering.material 010502 geochemistry & geophysics 01 natural sciences Albite Pumpellyite Sphalerite Geochemistry and Petrology Galena engineering Economic Geology Fluid inclusions Pyrite 0105 earth and related environmental sciences |
| Zdroj: | Ore Geology Reviews. 97:88-108 |
| ISSN: | 0169-1368 |
| DOI: | 10.1016/j.oregeorev.2018.05.001 |
| Popis: | The gold deposits within the Latimojong Metamorphic Complex of Sulawesi, Indonesia, including Awak Mas and Salu Bulo, are estimated to host 50 tonnes Au with an average grade of 1.41 g/t. They are located within the metamorphic basement consisting of pumpellyite- to greenschist-facies metasedimentary and metavolcanic rocks, where gold precipitated in quartz veins that fill north-south striking normal faults and extensional fractures. The mineral assemblage is dominated by pyrite, chalcopyrite, galena, minor tetrahedrite-tennantite and sphalerite; gold is electrum with a low silver content (Au:Ag ratio of 8.5 to 9.1). Albite, dolomite-ankerite, siderite, chlorite, and white mica are the main alteration minerals. Quartz, albite and carbonate veins hosting H2O-bearing fluid inclusions with minor aqueous-carbonic phases (CO2 ± N2) were detected (mole fraction |
| Databáze: | OpenAIRE |
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