遵义黄家湾镍钼多金属矿成矿特征与成因

贵州遵义地区黄家湾镍钼多金属矿是寒武系底部的黑色页岩型矿床。黑色岩系中微量元素特征显示镍钼多金属矿层的Ni，Mo，Cd，V，Cu，Zn明显富集，而高场强元素Nb，Th，Hf，Zr，Ti亏损。稀土元素显示多金属矿层的艿（Eu）呈正异常，中稀土富集，重稀土亏损。结合镜下观察发现的有机质、红藻囊果与金属硫化物之间密切的共生关系和前人研究结果，分析了黑色岩系镍钼多金属矿的成因，认为镍、钼、铜、锌等金属元素的来源与热液有关，通过生物作用聚集并在缺氧的还原沉积环境下大量堆积，富集形成Ni—Mo金属硫化物矿床。

METALLOGENIC CHARACTERISTICS AND GENESIS OF THE HUANGJIAWAN Ni-Mo POLYMETALLIC DEPOSIT IN ZUNYI AREA

Huangjiawan Ni-Mo polymetallic deposit is the black shale type ore deposit at base of Cambrian system. The ore-bearing strata is characterized by evident enrichment of Ni, Mo, Cd, V, Cu and Zn and depletion of Nb, Th, Hf, Zr and Ti. ; and by the REE pattern with positiveδ（Eu） anomaly, MREE enrichment and HREE depletion. Combined with discovery of organic matter under microscope and close relation of algae crystocarp to metal sulfide genesis of Huangjiawan Ni-Mo polymetallic deposit is analyzed and is pointed out that Ni, Mo, Cu, Zn etc. come from hydrothermal fluid and accumulated under anoxia environment through organism to from the Ni-Mo polymetallic deposit.