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.
出处
《沉积与特提斯地质》
CAS
CSCD
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 )
