| 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,同时发生结晶作用和分异作用。 |
| 关键词: 阿尔金 球状辉长岩 新疆 |
| DOI： |
| 附件 |
| 投稿时间：2004-02-19 |
| 基金项目:国土资源部区域地质调查项目(200110200061)。 |
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| The discovery and significance of the corsite in the southern Altun fault, Xinjiang |
| PEI Zhong-chao, DING Li, QIN Shuang, QU Jin, ZHAO Zhi-qiang |
| (Henan Institute of Geological Survey, Zhengzhou 450007, Henan, China) |
| Abstract: |
| 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. |
| Key words: Altun corsite Xinjiang |
