长英质岩石中暗色微粒包体的形成机理  

FORMING MECHANISM OF MAFIC MICROGRANULAR ENCLAVES IN FELSIC MAGMATIC ROCKS

作　　者：朱永峰[1] 

机构地区：[1]北京大学地质系

出　　处：《地球科学（中国地质大学学报）》1995年第5期521-525,共5页Earth Science-Journal of China University of Geosciences

基　　金：国家教委留学回国人员资助

摘　　要：通过对熔体网络结构中基性组分和酸性组分的分布特征和各自联结程度的定量描述，确定了岩浆液态分离作用发生的临界状态，长英质岩石中广泛分布的暗色微粒包体是岩浆演化过程中液态不混溶作用发生的结果，是岩浆体系自身演化到某一特定阶段（岩浆液态分离作用发生的临界状态之前）的产物。暗色微粒包体是由无到有，由小到大的，而且其生长过程的每一阶段都是相似的。这种相似性表明：复杂的自然现象背后隐藏着多么令人惊叹的和谐和统一。By the studying of the distribution of basic and acid components in melt network and the extent of their linkage, we discussed the critical state of magma liquid immiscibility. Our point here is that the forming process of mafic microgranular enclaves is the result of magma liquid immiscibility .Further more,the formation of mafic microgranular is the direct products of magmatic system's evolution at a special stage(i.e)to the critical state of magma liquid immiscibility)Mafic microgranular enclave is produced by magma itself and grows gradually.It is interesting to note that the grow process of mafic microgranular at any stage is likely to each other.Such likeness is due to the same force,which controlled the forming process of mafic enclaves in felsic rocks.

关 键 词：长英质岩石 液态分离作用 暗色微粒包体 岩浆 

分 类 号：P588.124[天文地球—岩石学]