新疆西克尔萤石矿洞稀土元素地球化学特征及成因  

Geochemistry and Genesis of Mineral Rare Earth Elements in Fluorite Ore Cavities in Xinjiang Xiker Area

作　　者：刘显凤[1,2] 蔡忠贤[2] 李树新 周成刚 王春阳 杨涛 

机构地区：[1]长江大学地球科学学院,湖北荆州434023 [2]中国地质大学构造与油气资源教育部重点实验室,武汉430074 [3]中国石油东方地球物理公司,河北涿州072751

出　　处：《新疆石油地质》2012年第6期660-663,共4页Xinjiang Petroleum Geology

基　　金：国家973项目(2005CB422105);教育部重点实验室开放研究项目(TPR-2011-32)

摘　　要：在塔里木盆地柯坪隆起西部的西克尔地区奥陶系鹰山组可溶岩层中发育着大量的萤石矿洞。通过对萤石洞中矿物的组合、产状以及萤石、方解石稀土元素地球化学特征的研究,探讨了萤石矿洞成矿流体的来源。认为西克尔地区萤石洞内的多种矿物是同一热液流体系统在不同演化阶段的连续产物。早二叠世岩浆热流体沿早期形成的断裂上涌,对该区储集层起到建设性改造作用。A great number of fluorite ores occur in karst cavities of Yingshan formation of the Ordovician in Xiker outcrop in western Keping uplift of Tarim basin. In this paper, the mineral assemblages and occurrences and the geochemical features of fluorite and calcite as rare earth elements in the fluorite ore cavities are studied, and the fluorite ore evolution and ore-forming fluid source are discussed. It is recognized that the minerals found in the fluorite ore cavities are continuous products of the same hydrothermal fluid system in different evolutionary stages, and the magma thermal fluids of the Early Permian upwelling along the early formed faults have constructive modification effects on the reservoirs in this area.

关 键 词：塔里木盆地 西克尔地区 萤石矿 矿物组合 稀土元素 成因 

分 类 号：P57[天文地球—矿物学]