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阿尔金地块南西缘钙碱性侵入岩带由余个大小不等的花岗岩体组成,其岩石类型主10要有石英闪长岩、英云闪长岩、花岗闪长岩、二长花岗岩。对带内有代表性岩体的岩石矿物学、岩石化学、微量元素、稀土元素及同位素地球化学研究表明,其属钙碱性系列,具有同源岩浆演化特征,其形成环境为活动大陆边缘。花岗闪长岩全岩—等时线年龄为,确定为晚震RbSr575 Ma旦世产物。这一发现,对于深入研究阿尔金地块活动机制,再造震旦期造山过程有一定作用。
The Algin block southwestern margin of calc-alkaline intrusive rock belt is composed of more than one granite body of different sizes. The main rock types include quartz diorite, diorite, granodiorite and monzogranite . Rock mineralogy, petrochemistry, trace elements, rare earth elements and isotope geochemistry of the representative in-band rock mass indicate that it belongs to the calc-alkaline series and has the same magmatic evolvement characteristics. Its formation environment is the active continental margin. The whole rock-granodiorite-isochron age of the granodiorite was identified as a late-shock RbSr575 Ma-Dan product. This finding has a certain effect on further researching the mechanism of Altyn Lot and reconstructing the orogenic anomaly.