摘要
塔里木地块是一个具有完整的前寒武纪结晶基底并发育了良好的新元古代盖层的大陆块体。库鲁克塔格地块位于塔里木盆地东北缘是前寒武基底时代最老、规模最大、古构造-岩浆演化信息保留最好的一个块体,但对于复杂的高级变质岩,其年龄解释一直有很大的制约,锆石作为定年的首选对象,尤其是地质演化较为复杂的变质岩区,可能会经历Pb的丢失与扩散,蜕晶化作用等。本文通过LA-ICP-MS锆石U-Pb年代学以及地球化学的研究,对该区变质岩进行研究。该结论为古元古代末期塔里木地块发生与哥伦比亚超大陆聚合有关的碰撞造山事件提供了有力证据。
The Tarim block is a Precambrian crystalline basement with a complete and developed continental blocks of Neoproterozoic cover good. The Kuluketage block is located in the northeastern margin of the Tarim Basin is the Precambrian basement of the old age, the largest ancient tectonic magmatic evolution information remains a block of the best, but for the high grade metamorphic complex, the age has been greatly restricted interpretation, as the preferred object of zircon dating, especially geological evolution of metamorphic rock area more complex, may experience the loss of Pb and diffusion, metamictization etc.. This paper studies the LA-ICP-MS zircon U-Pb geochronology and geochemistry, of the metamorphic rocks. This conclusion provides strong evidence for the collision orogenic events related to the Columbia supercontinent in the late Proterozoic.
出处
《世界有色金属》
2016年第12期113-114,共2页
World Nonferrous Metals
基金
中国地质调查局“新疆兴地塔格阿匍口地区1:5万(K45E014010、K45E014011、K45E015010、K45E015011、K45E016011)等5幅区调”项目(编号:1212011120477)资助
