publication . Article . 2018

Petrography and Mineral Chemistry of Magmatic and Hydrothermal Biotite in Porphyry Copper-Gold Deposits: A Tool for Understanding Mineralizing Fluid Compositional Changes During Alteration Processes

Arifudin Idrus;
Open Access English
  • Published: 01 Jan 2018 Journal: Indonesian Journal on Geoscience (issn: 2355-9314, eissn: 2355-9306, Copyright policy)
  • Publisher: Geological Agency
<p><span>DOI: 10.17014/ijog.5.1.47-64</span></p><p>This study aims to understand the petrography and chemistry of both magmatic and hydrothermal biotites in porphyry copper-gold deposits, and to evaluate the fluid compositional changes during alteration processes. A total of 206 biotite grains from selected rock samples taken from the Batu Hijau porphyry Cu-Au deposit was analyzed. Detailed petrography and biotite chemistry analysis were performed on thin sections and polished thin sections, respectively, representing various rocks and alteration types. A JEOL JXA-8900R electron microprobe analyzer (EMPA) was used for the chemistry analysis. The biotite is textu...
free text keywords: biotite, fluid composition change, halogen F and Cl, mineral chemistry, petrography, porphyry Cu-Au deposits, Science, Q, Geology, QE1-996.5
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