Detail Hasil Pencarian

Judul :
Karakteristik Mineralogi Dan proses Pengendapan Emas Pada Endapan Emas-Perak Epitermal Gunung Pongkor, Jawa Barat
Pengarang : I Wayan Warmada
Jurnal : Media Teknik 2006, XXVIII(4)
Tahun : 2006
Summary / Kata Kunci : The Pongkor gold-silver deposit, formed at Pliocene age (2.05 ± 0.05 Ma) is the largest low-sulfidation epithermal precious metal deposit in Java. It consists of more than nine major subparallel quartz-adularia-carbonate veins. Vein Will records five paragenetic sequences, dominated by calcite in the early stage and quartz in the later stages of hydrothermal evolution. The sulfide association as the main gold carrier is dominated by pyrite, chalcopyrite, sphalerite, ±galena. Minor phases are silver-rich sulfides and sulfosalts, such as acantite-aguilarite, polybasite-pearceite, famatinite, proustite, tetrahedrite. Gold occurs as electrum and uyienbogaardtite. Microthermometric measurements result that the hydrothermal solution indicates low salinity (0 vt,t.% NaC7 equivalent) with a formation temperature around 220°C. Primal), gold deposition is mostly controlled by boiling and mixing between low and high temperature fluids.Deep supergene enrichment of both gold and silver seems to be critical for making Pongkor an economic ore deposit.
Keywords: epitermal, boiling, pengkayaan supergen, Pongkor, emas
File : Login Required
     
Sitasi  
    (tidak ada sitasi)
     
Referensi    
1.   A.C.Effendi, Kusnama, B.Hermanto, Geologic map of the Bogor quadrangle, Jawa., 1998
2.   Basuki, A., D.A.Sumanagara, DSinambela, The Gunung Pongkor gold-silver deposit, WestI Java, Indonesia., 1994
3.   C.Greffie, L Bailly, J.P.Milesi, Supergene alteration of primary ore assemblages from lowsulfidation Au-Ag epithermal deposits at Pongkor, Indonesia, and Nazareflo,, 2002
4.   E .Marcoux,, J.-P.Milesi, Epithermal gold deposits in West Java, Indonesia: geology, age and crustal source., 1994
5.   E.Marcoux, J.-PMilesi, TSitorus, M.Simandjuntak, The epithermal Au-Ag-(Mn) deposit of Pongkor (West Java, Indonesia)., 1996
6.   I W. Warmada, Ore mineralogy and geochemistry of the Pongkor epithermal gold-silver deposit, Indonesia, 2003
7.   I W. Warmada, B.Lehmann, M.Simandjuntak, Polymetallic sulfides and sulfosalts of the Pongkor epithermal gold-silver deposit, West Java, Indonesia., 2003
8.   J.P.Milesi, E.Marcoux, T Sitorus, M.Simandjuntak, J.Leroy, L.Bailly, Pongkor (west Java, Indonesia): a Pliocene supergene-enriched epithermal Au-Ag-(Mn) deposit., 1999
9.   M.D.Hannington, S.D. Scott, Sulfidation equilibria as guides to gold mineralization in volcanogenic massive sulfides: evidence from, 1989
10.   Sujatmiko, S.Santoso, Geologic map of the Leuwidantar quadrangle, Jawa., 1992
11.   W.B.Hamilton, Plate tectonics and island arcs., 1988
12.   W.W.,Lindgren, Mineral deposits., 1933
     
     
Inherent UGM
Gedung Pusat UGM
Lt 3 Sayap Utara
Bulaksumur
Telp. (0274) 564416