现代地质2017，Vol.31Issue(1)：33-45,13.
黑龙江省张广才岭南部早侏罗世花岗岩暗色微粒包体成因研究
Genesis Study on Mafic Microgranular Enclave from Early Jurassic Granites in the Southern Zhangguangcai Mountains in Heilongjiang Province
摘要
Abstract
Early Jurassic granites in the Southern Zhangguangcai Mountains show magma-mixing characteristics.In the granite mafic microgranular enclaves are well developed.They are mostly fine-grained dioritic magmatic enclaves.The enclaves highly vary in shape and size and have clear-cut,vague or transitional relationships with host rocks.It is evident that the mineral assemblage of enclaves is not in balance.For example,mineral has the characteristic of directional arrangement;the plagioclase has developed from the epicyclic zone and has the presence of both the old and the new generations,and there also appears acicular apatite.Research on geochemistry shows that enclaves and their host granite are closely related both in the REE and trace elements,which also shows a significant geochemical affinity.It indicates that Early Jurassic granitic rocks are of crust-mantle mixing,and that dark enclaves are formed by relatively basic mantle magma into the host magma,quenching and crystallizing.Granitic magma sources are mainly from newborn crust substance in the Southern Zhangguangcai Mountains.关键词
张广才岭/岩浆混合/早侏罗世花岗岩/暗色微粒包体/壳幔混合成因/黑龙江省Key words
Zhangguangcai Mountain/magma-mixing/Early Jurassic granite/mafic microgranular enclave/crust-mantle mixing/Heilongjiang Province分类
天文与地球科学引用本文复制引用
任永健,程烁,朱敬宾,王博,张明明,张旭,于汪,韩玥..黑龙江省张广才岭南部早侏罗世花岗岩暗色微粒包体成因研究[J].现代地质,2017,31(1):33-45,13.基金项目
中国地质调查局项目“黑龙江省1∶5万南蛤拉河子等四幅区域地质矿产调查”(1212011220474). （1212011220474）
