阿尔金南缘断裂带球状辉长岩的发现及意义  

The discovery and significance of the corsite in the southern Altun fault, Xinjiang

作　　者：裴中朝[1] 丁莉[1] 秦爽[1] 曲锦[1] 赵志强[1] 

机构地区：[1]河南省地质调查院,河南郑州450007

出　　处：《沉积与特提斯地质》2004年第1期41-45,共5页Sedimentary Geology and Tethyan Geology

基　　金：国土资源部区域地质调查项目 (2 0 0 1 1 0 2 0 0 0 6 1 )

摘　　要：本文报道了在新疆阿尔金山南缘断裂带中首次发现的球状辉长岩 ,及其产出特征与岩石学、地球化学特征。提出球状辉长岩代表了弧后盆地或活动大陆边缘位置 ,来自消亡洋壳和上覆楔状地幔岩这两种不同源岩组份的混合物。球状辉长岩的岩浆由消亡洋壳熔融直接产生 ,但熔体在上升达到地表的过程中 ,与楔状地幔岩发生反应 ,并加速楔状地幔岩的熔融 。The occurrence, petrology and geochemistry are dealt with in details for the corsite identified for the first time in the southern Altun fault, Xinjiang. The corsite appears generally in back-arc basins or on active continental margins as the mixtures derived from the consumed oceanic crust and overlying wedge-shaped (mantle)-derived rocks. The magmas of the corsite resulted from the direct melting of the consumed oceanic crust, and were often reacted with the wedge-shaped mantle-derived rocks during their migration to the surface, (accompanied) by crystallization and differentiation.

关 键 词：阿尔金 球状辉长岩 新疆 

分 类 号：P588.124[天文地球—岩石学]