小秦岭大湖金钼矿床辉钼矿铼锇同位素年龄及印支期成矿事件

CORC > 北京大学 > 地球与空间科学学院

	小秦岭大湖金钼矿床辉钼矿铼锇同位素年龄及印支期成矿事件; Molybdenite Re-Os isotope age of the Dahn Au-Mo deposit, Xiaoqinling and the Indosinian mineralization
	李诺 ; 李晶 ; 李文博 ; SUN YaLi ; XUE LiangWei
刊名	岩石学报
	2008
关键词	印支期成矿作用辉钼矿铼锇同位素年龄大湖金钼矿床小秦岭金矿田秦岭造山带 Indosinian mineralization molybdenite Re-Os isotope age Dahu Au-Mo deposit Xiaoqinling gold field qirding Orogen
英文摘要	东秦岭北部存在世界最大的钼矿带,并蕴涵著名的小秦岭造山型金矿田,金、钼矿床成矿时代和构造背景一直存在争议.河南小秦岭金矿田大湖金矿床深部新发现了石英脉型钼矿床,查明钼资源储量已达中型.6件辉钼矿样品Re-Os同位素模式年龄介于215.4±5.4～255.6±9.6Ma,等时线年龄为218±41Ma(2σ误差,MSWD=38),加权平均年龄为234±18Ma(2σ误差,MSWD=23),表明钼矿化发生在印支期.结合对已有年龄资料的归纳和分析,认为秦岭造山带曾在印支期发生重要的岩浆-成矿事件,但被燕山期造山作用所改造或破坏,在秦岭造山带北缘尚有明显保留或记录.; The northeastern Qinling Orogen is the largest Mo belt in the world, which hosts the well-known Xiaoqinling orogenic-type gold field. The age and tectonic setting of the Mo and An deposits in the northeast Qinling Orogen have been a long-time debated issue. Recently, Mo orebodies of quartz-vein type, with total Mo reserve being ranked as medium size, have been discovered in the deep extension of the Dahu orogenic-type An deposit, Xiaoqinling gold field. Six molybdenite samples from the deposit yield Re-Os isotopic model ages ranging from 215.4 +/- 5. 4 Ma to 255.6 +/- 9. 6 Ma, an isochron age of 218 +/- 41 Ma (2 sigma, MSWD = 38), and a weighted average age of 234 +/- 18 Ma (2 sigma, MSWD =23). This shows that the Mo mineralization occurred in Indosinian Orogeny or Triassic period. Based on summarizing and synthesizing the available isotope ages, this paper suggests that in the Qinling Orogen a significant magmatism -mineralization event occurred during Indosinian Orogeny. This event, however, was modified or destroyed during Yanshanian Orogeny, and could still be survived or recorded in the northernmost area of the Qinling Orogen.; 国家重点基础研究发展计划(973计划); 国家自然科学基金; 中国科学院"百人计划"; SCI(E); 中文核心期刊要目总览(PKU); 中国科技核心期刊(ISTIC); 中国科学引文数据库(CSCD); 0; 4; 810-816; 24
语种	中文
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/249109]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	李诺,李晶,李文博,等. 小秦岭大湖金钼矿床辉钼矿铼锇同位素年龄及印支期成矿事件, Molybdenite Re-Os isotope age of the Dahn Au-Mo deposit, Xiaoqinling and the Indosinian mineralization[J]. 岩石学报,2008.
APA	李诺,李晶,李文博,SUN YaLi,&XUE LiangWei.(2008).小秦岭大湖金钼矿床辉钼矿铼锇同位素年龄及印支期成矿事件.岩石学报.
MLA	李诺,et al."小秦岭大湖金钼矿床辉钼矿铼锇同位素年龄及印支期成矿事件".岩石学报 (2008).