地球学报Issue(4)：385-394,10.DOI:10.3975/cagsb.2013.04.01
西藏尕尔穷-嘎拉勒铜金矿集区成矿规律、矿床模型与找矿方向
The Metallogensis, Deposit Model and Prospecting Direction of the Ga’erqiong-Galale Copper-gold Ore Field, Tibet
摘要
Abstract
Located in the south of western Bangong Co-Nujang River metallogenic belt of north Gangdise, the Ga’erqiong-Galale copper-gold ore field possesses lots of ore body types (porphyry type, skarn type and iron oxide-copper-gold type) and high gold grade (up to 205 g/t) and unique structural position, thus having great research significance. According to systematic summary of ore concentration areas and systematic analysis of data,the authors identified ore characteristics, found a large number of native gold and intermetallic compounds, and summarized the metallogensis. It is considered that metallization was mainly associated with emplacement of quartz diorite and granodiorite in the late phase of Yanshanian period, the evolution time between diagenesis and mineralization was about 1 Ma, and the mineralization in the area was characterized by the vertical zoning of copper-gold in the upper part and molybdenum in the lower part. S, Pb isotopes suggest that the metallogenic material had characteristics of crust-mantle mixing. During the emplacement and fractionation evolution of metaluminous-weak peraluminous calc-alkaline-high-K calc-alkaline magmatite, the porphyry-skarn type copper-gold-molybdenum ore bodies were formed in the area of pluton uplifting and along the contact zone between the pluton and the Cretaceous carbonate, whereas iron oxide-copper-gold type ore bodies were formed at the edge of pluton’s tectonic fracture zone (F1 fault). On such a basis, the authors have established the porphyry-skarn-iron oxide-copper-gold type “three-position” mineralization deposit model of magmatite-strata-ore-controlling structure. Based on these data, the authors indicate the prospecting direction in search for new ore bodies in the ore field.关键词
尕尔穷-嘎拉勒矿集区/成矿规律/矿床模型/斑岩-矽卡岩型矿体/班公湖-怒江成矿带Key words
Ga’erqiong-Galale ore field/metallogensis/deposit model/porphyry-skarn ore body/Bangong Co-Nujiang River metallogenic belt分类
天文与地球科学引用本文复制引用
唐菊兴,张志,李志军,孙燕,姚晓峰,胡正华,王红星,宋俊龙,何林..西藏尕尔穷-嘎拉勒铜金矿集区成矿规律、矿床模型与找矿方向[J].地球学报,2013,(4):385-394,10.基金项目
本文由国家自然科学基金项目(编号:41172077)、国家973项目(编号:2011CB403103)、国土资源部公益性行业科研专项项目(编号:201011013-3)联合资助。获中国地质科学院2012年度十大科技进展第八名。 （编号:41172077）
