摘要
陕西煎茶岭金矿床产于煎茶岭超基性岩体的接触带内。矿床地球化学类型为Ａｕ－Ｎｉ－Ｃｕ－Ａｇ。金矿床的元素组合、稀土元素、同位素等特征表明超基性岩不仅是赋矿岩石，也是金矿床的矿源岩。金矿床的硫具多源性，来自于地幔和围岩。４００Ｍａ时活动的中酸性岩浆热液不仅使超基性岩变质，而且使呈分散状态存在于超基性岩中的金一部分破活化而进入热液形成含矿热液。当含矿热液运移到超基性岩体的接触带内时，由于温度、压力的降低，金变得不稳定从流体中沉淀出来形成矿床。
Jianchaling gold deposit in Shanxi-occurs within contact zone of ultrabasic rock. The type of geochemistry of the gold deposit is Au-Ni-Cu-Ag. Characteristics of elements assemblage, rare earth elements, stable isotope of the gold deposit indicate that the ultrabasic rock is not only host rock of the gold deposit but also source rock of the gold deposit. S of the gold deposit comes from the mantle and country rock. Acidic magmatic hydrothermal solution in 400 my not only causes metamorphism of the ultrabasic rock but also dissolves part of gold which is scattered in the ultrabasic rock. Au precipitated from ore forming fluid and formed gold deposit when ore-forming fluid immigrates into contact zone of the ultrabasic rock due to P.T decreasement.
出处
《地质找矿论丛》
CAS
CSCD
1994年第3期59-65,共7页
Contributions to Geology and Mineral Resources Research
