【摘要】 新疆东准噶尔卡拉麦里地区库布苏南岩体以花岗闪长岩为主,稀土元素和微量元素地球化学研究表明,具有轻稀土富集,重稀土亏损,随酸度的增加,ΣREE增加,δEu值显著降低(1.03～0.25),K,Rb,Th大离子亲石元素明显富集,Rb,Th等不相容元素呈正异常,Ba,Zr等元素形成明显的谷.结合东准噶尔卡拉麦里地区晚古生代构造-岩浆演化过程分析,岩体形成于卡拉麦里造山带的大陆主碰撞后初始拉张阶段(300±10)Ma,属于后碰撞花岗岩.布苏南岩体记录了东准噶尔卡拉麦里地区"软碰撞"后陆内均衡调整过程,为建立东准噶尔地区构造格架和恢复岩浆演化事件提供了最有力的证据.更多还原

【Abstract】 Granodiorite is main lithological character of the Kubusunan rock in Kalamaili area,East Junggar,Xinjiang.Study of trace element and REE of the rock,rocks characteristics of rich LREE,defect HREE,with acidity increase,ΣREE rise,δEu remarkable drop(1.03～0.25),lager ion element like K、Rb、Th rich,accommodating element like Rb、Th exceptionally,Ba、Zr lower than others.Based on tectonics-magma evolution of the Later Paleozoic era in Kalamaili area,East Junggar,indicated that rock formed in initial stretch stage of the main-collision(300±10Ma) in the Kalamaili orogenic zone,belongs to post-collision granite type,that record the process continental equilibrium adjust of "soft-collision"in Kalamaili area,and take stronge evdent for rebuilding tectonic framework and recovering magma evolution in East Junggar.更多还原