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青海德尔尼铜(钴)矿床研究新进展
Progress in the Research of De’erni Cu(Co) Ore Deposit
【摘要】 以大比例尺地质填图和实测剖面工作为基础,通过野外详细地质观察,室内电子探针分析对比,再结合前人研究成果,论述了德尔尼铜(钴)矿床成矿晚于超基性岩,矿床主体为海底喷流沉积成因,同时经历了热液叠加成矿作用和构造变位。其成矿过程为:在拉张环境下,蛇绿岩破碎,同时发生了海底喷流—沉积作用,喷流物质沿蛇绿岩中的构造破碎带喷出与沉积,并萃取了超基性岩中大量的钴,矿体形成后又经历了构造变位。
【Abstract】 Based on geological mapping and profiling combining with existing study achievements,the authors consider that the mineralization of De’erni Cu(Co) ore deposit should be later than its ultra-basic country rock.The genesis of De’erni ore deposit is mainly submarine exhalation-sedimentation,and it experiences later superimposed hydrothermal mineralization.The metallogenic process is such that in extensional tectonic setting,submarine exhalation-sedimentation occurs,the ophiolite breaks up,exhalative materials emplace in the ultra-basic rock along fault belt and extract large mount of Cobalt element from ultra-basic rock.Then,the ore bodies experience complicated tectonic events.
【Key words】 genesis of deposit; metallogenic process; submarine exhalation-sedimentation; De’erni; Qinghai Province;
- 【文献出处】 地球科学与环境学报 ,Journal of Earth Sciences and Environment , 编辑部邮箱 ,2009年01期
- 【分类号】P618.41
- 【被引频次】21
- 【下载频次】333