地质通报2012，Vol.31Issue(5)：773-782,10.
扬子地块西北缘震旦系灯影组铅锌矿的成矿地质背景
Metallogenic geological background of lead-zinc polymetallic deposits of Sinian Dengying Formation in the northwestern margin of Yangtze landmass
摘要
Abstract
According to the train of thought "structure controls basin, basin controls fades and fades controls ore deposit", the authors studied metallogenic conditions of lead-zinc deposits such as sedimentary basin, ore-bearing formation, ore-controlling structure, lithofacies and paleogeography, analyzed metallogenic characteristics and summed up the ore-forming regularity. In Dengying period, NE- and NNE-trending contemporaneous faults were developed on the Chuanxi-style basement in the northwest margin of Yangtze plate and, as a result, nearly NE-trending second-order basins and platforms were formed, which constituted the structural framework, of the platform alternate with the basin. The second -order basin was characterized by infraridal zone sediments of restricted basin, slump dolorudite appeared on the marginal slope of the platform, and ore-bearing hydrothermal fluids that migrated along contemporaneous faults were concentrated in brecciform marble to form ore deposits. Studies show that lead-zinc mineralization of Dengying Formation was obviously controlled by such factors as semi-active type basement of the basin, second-order basins in magnesian carbonate rock platform and contemporaneous faults that control the second-order basin.关键词
角砾状白云岩/同生断裂/铅锌矿/碳酸盐台地/川西式半活动基底/扬子西北缘Key words
brecciated dolomite/ contemporaneous fault/ lead-zinc deposit/ carbonate platform/ semi-active Chuanxi style basement/ northwestern margin of Yangtze landmass分类
天文与地球科学引用本文复制引用
陈高潮,王炬川,张俊良,张清盛,孔文年,陈隽路,李金超..扬子地块西北缘震旦系灯影组铅锌矿的成矿地质背景[J].地质通报,2012,31(5):773-782,10.基金项目
中国地质调查局项目《1∶25万南江市幅(I48C004004)、安康市幅(I49C004001)区域地质调查(修测)》(编号:1212010510406) （I48C004004）
