中国地质2013，Vol.40Issue(4)：1209-1217,9.
东昆仑拉陵灶火钼多金属矿床地质特征及辉钼矿Re-Os同位素定年
Geological features and Re-Os isotopic dating of the Lalingzaohuo molybdenum polymetallic deposit in East Kunlun
摘要
Abstract
The Lalingzaohuo molybdenum polymetallic deposit in the Qimantag metallogenic belt of Qinghai Province is a newly discovered skarn-porphyry type deposit.Eleven samples and four repetition samples for Re-Os isotopic dating were analyzed,and the model ages show two segments:214.1～223.9 Ma and 235.7～240.8Ma with 107Re-107Os isochron ages of (214.5±4.9) Ma and (240.8±4.0) Ma and the weighted average model ages of (217.6±3.5) Ma and (238.4±1.2) Ma,respectively.The age dating indicates that there are two metallogenicepochs:Middle Triassic and Late Triassic.The rhenium content of the molybdenite ranges from 17.40 × 10-6 to 149.52 × 10-6,with the great majority concentrated in a dozen micrograms to tens of micrograms,indicating a crust-mande mixed mineral source.Combined with previous studies,the authors hold that the two ore-forming events in Triassic were associated with the breakoff of the subducting slab in Middle Triassic and lithospheric delamination in Late Triassic.关键词
拉陵灶火钼多金属矿床/辉钼矿/Re-Os同位素定年/祁漫塔格Key words
Lalingzaohuo Mo polymetallic deposit/ molybdenite /Re-Os isotope dating/ Qimantag分类
天文与地球科学引用本文复制引用
王富春,陈静,谢志勇,李善平,谈生祥,张玉宝,王涛..东昆仑拉陵灶火钼多金属矿床地质特征及辉钼矿Re-Os同位素定年[J].中国地质,2013,40(4):1209-1217,9.基金项目
国土资源部公益性行业科研专项(201211037)、青海省科技支撑计划项目(2011-J-113A)及青海省自然科学基金项目(2012-Z-934Q)联合资助. （201211037）
