青海滩间山金矿床构造演化及成因探讨

STRUCTURAL EVOLUTION AND GENESIS OF THE TANJIANSHAN GOLD DEPOSIT

滩间山地壳自中元古代蓟县纪以来经历了长期复杂的演化历史。金矿床的形成与本区地壳构造演化密切相关。蓟县纪早期，万洞沟群黑色岩系沉积于ＮＥ 向同生断裂控制的凹陷中，矿源层产生；蓟县纪晚期，区域变质作用为成矿奠定了基础；加里东期，韧性剪切带对金矿富集有重要作用；华力西期，脉岩型矿石生成；印支期，伴随推覆作用有微弱矿化的叠加；喜山期，氧化矿石形成。因此，滩间山金矿床是本区地壳构造演化的产物，属黑色岩系同构造多因复成金矿床，即滩间山型金矿床。

The Tanjianshan crust has undergone long complex evolution history since Jixian Period in Midle Proterozoic Era. The gold mine ralization was closely related to structural evolution in this district. The black series was controlled by NW syngenetic fault and the source bed was produced during early Jixian period. Regional metamorphism was gold forming foundation during late Jixian period. The ductile shear zone has played an important role in gold body forming and enrichment since Caledonian. The gold veined rock was formed in Variscan. Ore forming element was piled up it because of napping in Indosinian. The Oxidized gold ore was formed in Himalayan. Therefore, the Tanjianshan gold deposit is the result of structural evoluation. It could be divided into the syntectonic multipled genesis gold deposit in black rock series, and could be named as the Tanjianshan typical gold deposit. [