北天山依林黑比尔根断裂带充填物地球化学特征及构造指示意义  

Geochemical characteristics and tectonic significance of fillings ofYilin Heibiergen Fault Zone in Northern Tianshan Mountain

作　　者：马骥[1] MA Ji(Exploration and Development Research Institute,Shengli Oilfield Company,SINOPEC,Dongying City,Shandong Province,257015,China)

机构地区：[1]中国石化胜利油田分公司勘探开发研究院,山东东营257015

出　　处：《油气地质与采收率》2023年第5期49-56,共8页Petroleum Geology and Recovery Efficiency

基　　金：中国石化股份有限公司课题“准噶尔盆地及周缘矿权战略选区及评价研究”(P21086-4)。

摘　　要：基于玛纳斯河剖面、后峡剖面和达坂城剖面典型断裂(带)围岩样品的矿物学和地球化学测试结果,分析不同走向断裂带充填物的稀土元素地球化学分布与差异,研究和评价北天山依林黑比尔根断裂带充填物的来源以及构造环境。结果表明:研究区依林黑比尔根断裂带附近断裂带充填物脉体与全岩的稀土元素特征十分相似,表现为轻稀土元素的相对富集。近EW向断裂带充填物主要位于板块汇聚边界,形成时间较早,来源于地壳深部,是深部岩浆热液作用的结果;NE—SW向断裂带充填物主要来源于板块汇聚边缘以及陆内碰撞构造环境,形成时间相对较晚,是地壳浅部活动的产物。The rock samples of the typical faults(zones)of Manasi River profile,Houxia profile,and Dabancheng profile were examined in terms of their mineralogical and geochemical components.On this basis,the geochemical distribution and differences in the rare earth elements were analyzed for the fault zone fillings of different trends,and the source and tectonic environment of the fillings of Yilin Heibiergen Fault Zone were studied and assessed.The results showed that the characteristics of the veins of fault zone fillings near Yilin Heibiergen Fault Zone in the study area are similar to those of the rare earth elements of whole rock,demonstrating the relative accumulation of light rare earth elements.The fillings of the nearly EW-trending fault zone came from the deep crust and formed relatively early,which were mainly at the convergence boundary of the plates and resulted from the hydrothermal process of hypo magma.The fillings of the NE-SW trending fault zone,formed relatively late,were developed at the convergence edge of plates and in the tectonic environment of intra-continental collisions,which were the results of shallow crust activities.

关 键 词：稀土元素 断裂带充填物 构造指示 依林黑比尔根断裂带 

分 类 号：TE122.2[石油与天然气工程—油气勘探]