矿床地质2011，Vol.30Issue(6)：963-978,16.
广西苍梧县社洞钨钼矿床花岗岩类锆石LA-ICP-MS和辉钼矿Re-Os年龄及其地质意义
Zircon LA-ICP-MS U-Pb ages of granitoid rocks and molybdenite Re-Os age of Shedong W-Mo deposit in Cangwu County of Guangxi and its geological significance
摘要
Abstract
Located in southern margin of Dayaoshan uplift, the Shedong tungsten and molybdenum deposit in Cangwu County of Guangxi is a porphyry-skarn-quartz vein type ore deposit related to granitoids. Zircon LA-ICP-MS U-Pb dating of granitoids yielded the isochron age of granite porphyry [ (91.05 ±0.31) Ma] and that of granodior-ite ((435.8 + 1.3) Ma] in Sheshan multiple stock as well as the isochron age of granodiorite-porphyry [(432.0 ±1.7) Ma] in Pingtoubei ore blocks. Re-Os isochron age of molybdenite hosted in quartz veins related to granodiorite-porphyry veins is (437.8 ±3.4) Ma. These high precision dating data suggest that tungsten and molybdenum mineralization was formed in Early Silurian, related closely to granodiorite (-porphyry). This new evi-dence provides constrains on the time of the Caledonian orogeny and magmatic activity in southern China, and indicates the probable existence of an intense W-Mo-Cu-( Au) mineralization during Caledonian period in Dayaoshan uplift.关键词
地球化学/LA- ICP-MS锆石U-Pb年龄/辉钼矿Re-Os年龄/社洞钨钼矿床/大瑶山隆起/广西苍梧县Key words
geochemistry, zircon LA-ICP-MS U-Pb age, molybdenite Re-Os age, Shedong W-Mo deposit, Dayaoshan uplift, Cangwu County of Guangxi分类
天文与地球科学引用本文复制引用
陈懋弘,莫次生,黄智忠,李斌,黄宏伟..广西苍梧县社洞钨钼矿床花岗岩类锆石LA-ICP-MS和辉钼矿Re-Os年龄及其地质意义[J].矿床地质,2011,30(6):963-978,16.基金项目
本文得到中央级公益性科研院所基本科研业务费专项资金(编号:K1015,K1013)和中国地质调查局工作项目"云开地区铜金多金属成矿作用及其地质背景研究"(编号:1212011120831)的联合资助 （编号:K1015,K1013）
