摘要
用ICP-MS方法对金矿中磁铁矿-黄铁矿-绿泥石-石英成矿阶段(第Ⅱ成矿阶段)和多金属硫化物阶段(第Ⅲ成矿阶段)石英中的流体包裹体的稀土元素测定,发现第Ⅱ、Ⅲ成矿阶段流体中的REE组成具相同的Eu亏损和相似的右倾斜分布型式。与矿区火山岩和侵入岩的REE组分对比分析,认为成矿流体的REE组成主要继承了火山岩和侵入岩(早期岩浆热液)的Eu亏损和右倾斜特征,但前者的LREE更加富集分、布曲线更加向右陡倾斜,反映与晚期变质水和大气降水的混合作用后,成矿流体中REE组成发生了变化。
Rare earth elements are analyzed from fluid inclusions within quartz of both magnetite-pyrite-chlorite-quartz ore-forming stage (Ⅱore-forming stage) and polymetallic sulfide ore-forming stage (Ⅲore-forming stage) of Matoutan gold deposit in the eastern Tianshan mountains. The ICP-MS analytical result shows that the fluids from both ore-forming stages Ⅱ and Ⅲ have a common Eu depletion and similar right-dipping REE pattern. A comparison of their REE patterns with those of volcanic rocks and intrusive rocks in the study area indicates that the REE pattern of ore-forming fluids mainly inherited Eu depletion and right-dipping pattern of the volcanic and intrusive rocks, and REEs of the ore-forming fluids are more LREE-enriched than those of the volcanic and intrusive rocks because ore-forming fluids incorporate both metamorphic and meteoric water during mineralization.
出处
《新疆地质》
CAS
CSCD
2002年第4期367-370,共4页
Xinjiang Geology
基金
中国地质调查局国土资源大调查项目(DKD9902001)及国家重点基础研究项目(G1999043216和2001CB409807)共同资助
