Auriferous Quartz Veins from the Dongping Gold Deposit, NW Hebei Province and Metallogenesis—Fluid Inclusion Rb-SrIsochron Evidence  

作　　者：莫测辉 王秀璋 程景平 

机构地区：[1]GuangzhouInstituteofGeochemistry,ChineseAcademyofSciences,Guangzhou,510640

出　　处：《Chinese Journal Of Geochemistry》1996年第3期265-271,共7页中国地球化学学报

摘　　要：The Dongping gold deposit, situated on the northern margin of the North China Platform, is a composite deposit composed of auriferous quartz vein-type and altered rock-type ore bodies. It is hosted in the inner contact zone of an alkaline intrusion which was intruded into Archean metamorphic rocks and was formed not later than the Hercynian peried. Auriferous quartz veins of the deposit are dated with the fluid inclusion Rb-Sr isochron method at 103 ±4Ma, indicating that the gold deposit was formed in the Yenshanian period. 87Sr/86Sr sourcetracing shows the ore-forming materials came dominantly from alkaline intrusions. These results, combined with other isotope and REE data, suggest that the Dengping gold deposit is not a traditional magmatic hydrothermal deposit, but a reworked hydrothermal deposit related to heated and evoved meteoric water.The Dongping gold deposit, situated on the northern margin of the North China Platform, is a composite deposit composed of auriferous quartz vein-type and altered rock-type ore bodies. It is hosted in the inner contact zone of an alkaline intrusion which was intruded into Archean metamorphic rocks and was formed not later than the Hercynian peried. Auriferous quartz veins of the deposit are dated with the fluid inclusion Rb-Sr isochron method at 103 ±4Ma, indicating that the gold deposit was formed in the Yenshanian period. 87Sr/86Sr sourcetracing shows the ore-forming materials came dominantly from alkaline intrusions. These results, combined with other isotope and REE data, suggest that the Dengping gold deposit is not a traditional magmatic hydrothermal deposit, but a reworked hydrothermal deposit related to heated and evoved meteoric water.

关 键 词：石英型金矿床 铷同位素 锶同位素 稀土元素 RB-SR等时线 

分 类 号：P618.51[天文地球—矿床学] P597[天文地球—地质学]