地质学报2017，Vol.91Issue(5)：979-991,13.
青海东昆仑瑙木浑金矿蚀变绢云母Ar-Ar年龄、石英闪长岩锆石U-Pb年龄和岩石地球化学特征
Ar-Ar Age of Altered Sericite, Zircon U-Pb Age of Quartz Diorite and Geochemistry of the Naomuhun Gold Deposit, East Kunlun
摘要
Abstract
East Kunlun is endowed with abundant gold resources and is nicknamed the "Gold Belt" in China.The Naomuhun gold deposit is just located in the metallogenic belt of Caledonian post-arc rifting in the north of East Kunlun.Geochemical studies indicate that quartz diorite which is spatially related to gold-bearing rock is of high-K calc-alkaline series and has the attribute of Andean type epicontinental igneous tectonics.40Ar-39Ar dating yields an average age of 227.84±1.13Ma for sericite.Zircon U-Pb dating yields an age of 235.8±0.8Ma for quartz diorite,suggesting that it formed due to northward subduction of the Animating ocean basin during the middle triassic period.Indosinian is the major gold metallogenic epoch of the East Kunlun area.Therefore,this study is of great importance to further understanding the formation of the Naomuhun gold deposit.关键词
东昆仑地区/瑙木浑金矿/40Ar-39Ar年龄/锆石U-Pb年龄/印支期Key words
East Kunlun area/Naomuhun gold deposit/40 Ar-39 Ar age/zircon U-Pb age/Indosinian引用本文复制引用
李金超,孔会磊,栗亚芝,南卡俄吾,贾群子,国显正,张斌..青海东昆仑瑙木浑金矿蚀变绢云母Ar-Ar年龄、石英闪长岩锆石U-Pb年龄和岩石地球化学特征[J].地质学报,2017,91(5):979-991,13.基金项目
本文为中国地质调查局项目(编号DD20160013、12120115022101、1212010918044、12120113029000)资助的成果. （编号DD20160013、12120115022101、1212010918044、12120113029000）
