地质与勘探2012，Vol.48Issue(2)：274-287,14.
西藏改则县多不杂斑岩型铜金矿床勘查模型
An Exploration Model of the Duobuza Porphyry Cu-Au Deposit in Gaize Country, Northern Tibet
摘要
Abstract
The Duobuza porphyry Cu-Au deposit of Gaize country in Tibet, newly-discovered by the Geological Brigade No. 5 of Tibet, is a giant copper-gold deposit in the Bangong Lake-Nujiang metallogenie belt. It is another significant prospecting breakthrough after the Yulong, Qulong, Xiong- cun and Jiama deposits, and also the fimt super-large porphyry Cu-Au deposit located in the Bangong Lake-Nujiang metallogenie belt. The Duobuza por- phyry Cu-Au deposit occurs in the contact zones between Early Cretaceous granodiofites and Upper Jurassic Quse Formation degenerative quartzose ar- kose. This deposit possesses favorable metallogenic background where active magnetic activity provided good conditions for porphyry copper-gold minerali- zation. It presents typical alteration zoning characteristics of porphyry copper, showing potassium silication, beresitization, muddy zones and hornfels from porphyries to wall rocks. Geophysical survey shows that the ore-bearing porphyry has a low polarization rate and high apparent resistivity. The 1 ： 100013 soil survey data reveals porphyry copper deposits are commonly discovered at high Cu and Au equatorial anomaly areas, corresponding to high strength and distinct concentration centers of Cu, Au, Ag and Mo geochemistry comprehensive abnormal areas. Furthermore, it especially coincides with the Cu and Au abnormal position. The 1：50000 stream sediment geochemical anomalies reveal that high anomalies of Au, Ag, As, Sb, Cu, Pb and Zn always coin- cide with the anomalies by induced electric detection. This paper establishes a geology-geophysics-geochemistry exploration model based on integrated studies. Through prospecting and initial evaluation, we discovered other porphyry deposits such as the Bolong, Nadun, Naruo, Saijiao, Ga＇ erqin, Tiege- long, Dibaonamugang porphyry deposits in the surrounding areas, forming the Duolong porphyry copper-gold concentration. This may provide guidance significance for regional prospecting in this region.关键词
班公湖-怒江成矿带/多不杂/斑岩型/铜金矿床/勘查模型Key words
Bangong Lake-Nujiang metallogenic belt/Duobuza/porphyry Cu-Au deposit/exploration model分类
天文与地球科学引用本文复制引用
李玉彬,多吉,钟婉婷,李玉昌,强巴旺堆,陈红旗,刘鸿飞,张金树,张天平,徐志忠,范安辉,索朗旺钦..西藏改则县多不杂斑岩型铜金矿床勘查模型[J].地质与勘探,2012,48(2):274-287,14.基金项目
本文为中央公益性行业专项（项目编号：201011013）,西藏班公湖一怒江成矿带西段铜多金属资源调查（编号1212010530102）,国家973项目（编号2011CB403103）,自然科学基金（项目编号：41172077）资助的成果. （）
