摘要
喀雅克登塔格杂岩体位于东昆仑祁漫塔格山东南部,由辉长岩、闪长岩、石英闪长岩、花岗闪长岩、二长花岗岩、正长花岗岩等岩石类型组成,具有典型的岩浆混合特征。通过对杂岩体中辉长岩和二长花岗岩的锆石进行SHRIMP测年,分别获得403.3±7.2Ma和394±13Ma两个极为接近的岩浆锆石年龄以及1116Ma的继承锆石年龄。锆石形态学特征显示辉长岩和二长花岗岩中锆石的大致结晶温度分别为850～900℃和600～850℃,提供了杂岩体形成的深度信息。测年结果为研究东昆仑造山带的演化历史提供了重要的年代学资料。
Kayakedengtage complex, located in southeastern Qimantage Mountain of the East Kunlun Mountains, consists of gabbro, diorite, quartz diorite, granodiorite, adamellite and syenogranite which are products of a typical magmatic mixing process. The SHRIMP dating of gabbro and adamellite samples yielded magmatic ages of 403.3 ＋ 7.2 Ma and 394 ＋ 13 Ma and inherited zircon age of 1 116 Ma. The morphological features of zircons from gabbro and adamellite indicate that the zircon crystallization temperatures of these two rocks are 850 --900℃ and 600--850℃, respectively, which implies the formation depth of the complex. The dating results provide important data for the evolutionary history of the East Kunlun orogenic belt.
出处
《岩石矿物学杂志》
CAS
CSCD
北大核心
2006年第1期25-32,共8页
Acta Petrologica et Mineralogica
基金
中国地质调查局地质调查项目(200113900069_4_3
200113900018_5)
