地质与资源2018，Vol.27Issue(1)：33-40,8.
辽宁北镇地区新太古代变质深成岩地球化学特征及成因探讨
GEOCHEMISTRY AND GENESIS OF THE NEOARCHEAN METAMORPHIC PLUTONIC ROCKS IN BEIZHEN AREA, LIAONING PROVINCE
摘要
Abstract
The Neoarchean metamorphic plutonic rocks in Beizhen area of Liaoning Province are the oldest crystalline basement in the region.With general metamorphism and deformation of plutons,the structures of protolith have changed.The plutonic rocks can be divided into two rock units of Xiaoqianmaling gneiss complex (Ar3xqgnc) and Baichangmen gneiss (Ar3bgn) according to the characteristics and distribution of rock mass.The SiO2 content in Ar3xqgnc is 59.69％-76.22％.The liquidus temperatures of the two rocks are 720-1024 ℃ and 776-1024 ℃ respectively.The Ar3xqgnc is characterized by high degree of magmatic differentiation,while Ar3bgn with high differentiation index (DI) of 68.99-91.68.The Ba/Sr ratios of both rocks are close to each other with approximately parallel right-dipping REE patterns,showing unobvious Eu anomalies with enrichment of LREEs,which indicates that the two rocks are derived from similar material sources.关键词
新太古代/变质深成岩/地球化学特征/成因/辽宁北镇地区Key words
Neoarchean/metamorphic plutonic rock/geochemical characteristics/genesis/Beizhen area of Liaoning Province分类
天文与地球科学引用本文复制引用
王晓晗..辽宁北镇地区新太古代变质深成岩地球化学特征及成因探讨[J].地质与资源,2018,27(1):33-40,8.基金项目
中国地质调查局“辽宁1∶25万阜新市幅(K51C002002)区调修测”项目(编号1212011120728). （K51C002002）
