地质通报2016，Vol.35Issue(7)：1158-1169,12.
青海祁漫塔格地区牛苦头矿床和卡而却卡矿床B区花岗质岩石LA-ICP-MS锆石U-Pb年龄--对泥盆纪成岩成矿作用的指示
Geochronological study of granit-oids from the Niukutou and B section of the Kaerqueka deposits, Qimantag area, Qinghai Province:Implications for Devoni-an magmatism and mineralization
摘要
Abstract
The Niukutou and the Kaerqueka deposits are economically important in the Qimantag area of Qinghai Province (QA⁃ QP). In this paper, the authors present new LA-ICP-MS zircon U-Pb ages for granitoids from these two deposits, which show that the emplacement ages of the Niukutou granodiorite and B section of the Kaerqueka biotite monzogranite are 394.0 ± 1.3Ma and 406.4±4.2Ma, respectively. These ages are consistent with those of granitic intrusions associated with the Yemaquan, Wulanwuzhuer and Xiarihamu deposits, indicating that Early and Middle Devonian is an important period for magmatism and mineralization of the QAQP. Combined with previously published data and geological features, the authors hold that Early and Middle Devonian magma⁃tism and related polymetallic mineralization occurred in a post-collision tectonic setting, implying that Early and Middle Devonian might have been another significantly metallogenic period for the QAQP.关键词
东昆仑/青海祁漫塔格/牛苦头/卡而却卡/泥盆纪/成矿作用Key words
East Kunlun Mountains/Qimantag area of Qinghai Province/Niukutou/Kaerqueka/Devonian/mineralization分类
天文与地球科学引用本文复制引用
姚磊,张明超,吕志成,赵财胜,庞振山,于晓飞,祝新友,李永胜,刘鹏,李顺庭..青海祁漫塔格地区牛苦头矿床和卡而却卡矿床B区花岗质岩石LA-ICP-MS锆石U-Pb年龄--对泥盆纪成岩成矿作用的指示[J].地质通报,2016,35(7):1158-1169,12.基金项目
国土资源公益性行业科研专项（编号201411024）和中国地质调查局项目 （）
