地质学报2018，Vol.92Issue(6)：1264-1279,16.
辽东青城子矿集区双顶沟岩体年代学及地球化学研究
Geochronology and Geochemistry Study of the Shuangdinggou Intrusion in the Qingchengzi Ore Concentration Area, Eastern Liaoning Province
摘要
Abstract
The Indosinian magmatism in the Qingchengzi ore concentration area resulted in the formation of the Shuangdinggou batholith and quartz monzonitic porphyry veins.Based on the petrographic characteristics,the Shuangdinggou intrusion can be classified into two facies zones:the main lithofacies and the central lithofacies.The main lithofacies contain abundant mafic microgranular enclaves and show unbalanced textures,displaying the characteristic of magma mixing.Geochemically,the major oxide contents of the enclaves and their host rocks possess better linear relation in the plot.The REE and trace elements patterns of the enclaves and the host rocks are similar,suggesting that they display the exchanges and equilibrium of elements between the enclaves and the host rocks.The main lithofacies of the Shuangdinggou intrusion has similar geochemical characteristics as the high Ba-Sr granite,and likely originated from magma effect of melts from partial melting of thickened lower crust and magma of enriched mantle.The central lithofacies was formed by the fractional crystallization of feldspar,hornblende,bitite,etc.Quartz monzonitic porphyry might be the hypabyssal phase of Shuangdinggou intrusion and they both have the same source and genesis.The formation of the Pb-Zn or Au-Ag deposits in the Qingchengzi ore concentration area may be related to the quartz monzonitic porphyry which evolved from magma mixing.关键词
青城子矿集区/双顶沟岩体/岩浆混合/暗色微粒包体/分异演化Key words
Qingchengzi ore concentration area/Shuangdinggou intrusion/magma mixing/mafic microgranular enclave (MME)/magmatic differentiation引用本文复制引用
解洪晶,王玉往,李德东,石煜,周国超,龙灵利..辽东青城子矿集区双顶沟岩体年代学及地球化学研究[J].地质学报,2018,92(6):1264-1279,16.基金项目
本文为中国地质调查局地质调查项目(编号:12120115034001、12120115034101)资助的成果. （编号:12120115034001、12120115034101）
