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The Discovery of the Cu (Au‐Ag) Epithermal Deposit in the Duolong Ore Concentrating Area, Northern Tibet
Author(s) -
TANG Juxing,
SUN Xingguo,
DING Shuai,
WANG Qin,
WANG Yiyun,
YANG Chao,
ZHANG Zhi,
SONG Junlong,
YANG Huanhuan,
DUAN Jilin,
GAO Ke,
FANG Xiang,
TAN Jiangyun
Publication year - 2014
Publication title -
acta geologica sinica ‐ english edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 61
eISSN - 1755-6724
pISSN - 1000-9515
DOI - 10.1111/1755-6724.12380_32
Subject(s) - metallogeny , beijing , china , chinese academy of sciences , mineral resource classification , mining engineering , geochemistry , geography , geology , library science , archaeology , sphalerite , pyrite , computer science
Based on the latest survey and detailed geological records in 2013, as well as some preliminary study about geological features and deposit type of south Tiegelong (Rongna) copper (gold-silver) deposit which is located in Duolong copper (gold) ore concentration area, we believe that Rongna Copper is a typical high sulfidation porphyryrelated epithermal deposit. The Bangong Nujiang suture zone has become an important belt for exploring porphyry copper-gold deposits in Tibet and even in the whole country. More work is needed to improve theoretical and exploration practice by studying the metallogeny and deposit combinations of the porphyry-epithermal metallogenic system in the Duolong ore district. Qin et al. (2006) proposed there may be epithermal copper (gold) mine in Duolong, but there are no obvious breakthroughs in exploration. This paper aims to roughly determine the type of Rongna copper (gold-silver) deposit, improve the knowledge of Duolong porphyry epithermal mineralization system and make a breakthrough of theoretical guidance for prospecting. Epithermal deposits system is generally related to porphyry deposits (Gray et al., 1994; Hedenquist et al., 1998; Einaudi et al., 2002; John et al., 2003; Sillitoe et al., 2003; Chouinard et al., 2005; Richards et al., 2006; Sillitoe, 2010). Sillitoe et al. (2003) separated the epithermal-porphyry copper (gold) mineralization system into three kinds, including high-sulfidation, medium sulfidation and low sulfidation types. High-sulfidation type relates to andesitic and rhyolitic magma activities. There are alunite + kaolinite alteration assemblages. Silica cap is common. A combination of gold and copper silver minerals includes pyrite, enargite, antimony enargite, spiral-shaped silver sulfide, stibnite, jamesonite copper, digenite (Einaudi et al., 2002). They contain high levels of sulfate and high sulfur sulfate minerals.