矿床地质2012，Vol.31Issue(3)：449-458,10.
古溶洞控矿构造在青藏高原中部的发现及意义——以茶曲帕查铅锌矿床为例
Discovery of paleo-karst type lead-zinc deposit in Qinghai-Tibetan Plateau and its significance: A case study of Chaqupacha deposit
摘要
Abstract
The main host rocks for Pb-Zn mineralization of the Chaqupacha deposit are calcite matrix breccias that occur within the Permian limestone. This paper presents the breccia field relations and petrographic characteristics acquired during detailed mapping and drilling. The breccias do not occur at a fixed level whether in longitudinal or vertical section but appear to be random and irregular. Marls always fill in the space between carbonate breccias, and syn-sedimentary deformation structures occur at the contact zone between the limestone breccias and marl. These phenomena indicate that the breccias were formed by collapse in paleo-caves. Two types of compositions can be recognized in paleo-caves, i.e., collapsed breccias and marl filling, which show significant differences in mineralization. The paleo-caves originated possibly from subaerial karstification and collapsed in early Miocene, simultaneously with the sedimentation of Wudaoliang Formation. The discovery of paleo-caves mineralization in central Qinghai-Tibetan Plateau has great enlightenment for regional prospecting model of lead-zinc deposits, and the relationship between paleo-caves and mineralization type of the Chaqupacha deposit is of reference value for lead-zinc exploration.关键词
地质学/古溶洞/控矿构造/铅锌矿床/茶曲帕查/青藏高原中部Key words
geology, paleo-karst, ore-control structure, lead-zinc deposit, Chaqupacha, central of Qinghai-Tibetan Pleteau分类
天文与地球科学引用本文复制引用
张洪瑞,汪元奎,刘群,杨天南,宋玉财,侯增谦,杨竹森,田世洪,刘英超,李连松,王贵仁..古溶洞控矿构造在青藏高原中部的发现及意义——以茶曲帕查铅锌矿床为例[J].矿床地质,2012,31(3):449-458,10.基金项目
本文受国家973项目(2009CB421001)、国家自然科学基金项目(U09336051和41102040)和中央级公益性基本业务费专项基金(J1123)联合资助 （2009CB421001）
