| 东昆仑东段益克郭勒侵入岩LA-ICP-MS锆石U-Pb定年及其地质意义 |
| |
| 引用本文： | 郑振华,张勤山,何利,田滔,李生虎.东昆仑东段益克郭勒侵入岩LA-ICP-MS锆石U-Pb定年及其地质意义[J].世界地质,2022(1):56-71,84. |
| |
| 作者姓名： | 郑振华 张勤山 何利 田滔 李生虎 |
| |
| 作者单位： | 青海省地质调查局;青海省第五地质勘查院 |
| |
| 基金项目： | 2019年青海省地质勘查基金项目(2019048130kc072)。 |
| |
| 摘 要： | 东昆仑东段益克郭勒侵入体主要由闪长岩、石英碱长正长岩、英云闪长斑岩及花岗闪长岩组成.锆石LA-ICP-MS U-Pb定年结果显示,闪长岩、石英碱长正长岩和英云闪长斑岩的年龄分别为(223.4±1.1)Ma、(222.9±1.3)Ma和(230.9±1.1)Ma,表明益克郭勒侵入体形成于中三叠世.益克郭勒中三叠世侵入岩属...
|
| 关 键 词： | LA-ICP-MS锆石U-Pb定年 构造意义 后碰撞 东昆仑东段 益克郭勒 |
LA-ICP-MS zircon U-Pb dating of Yikeguole intrusive rocks in eastern segment of East Kunlun and its geological significance |
| |
| ZHENG Zhenhua,ZHANG Qinshan,HE Li,TIAN Tao,LI Shenghu.LA-ICP-MS zircon U-Pb dating of Yikeguole intrusive rocks in eastern segment of East Kunlun and its geological significance[J].World Geology,2022(1):56-71,84. |
| |
| Authors: | ZHENG Zhenhua ZHANG Qinshan HE Li TIAN Tao LI Shenghu |
| |
| Institution: | (Qinghai Geological Survey,Xining 810008,China;No.5 Geological Survey Institute of Qinghai Province,Xining 810099,China) |
| |
| Abstract: | Yikeguole intrusion,located in the eastern segment of East Kunlun,mainly consists of diorite,quartz alkali feldspar syenite,tonalite porphyry and granodiorite.LA-ICP-MS zircon U-Pb dating shows that the ages of the diorite,quartz alkali feldspar syenite and tonalite porphyry samples are(223.4±1.1)Ma,(222.9±1.3)Ma and(230.9±1.1)Ma,respectively,indicating that the Yikeguole intrusion was emplaced during the Middle Triassic.The Middle Triassic intrusive rocks belong to peraluminous,high-K calc-alkaline series with adakite-like geochemical characteristics,and are probably post-collisional igneous rocks,which implies that the tectonic evolution of the East Kunlun orogenic belt was transferred into the post-collisional period during the late Middle Triassic.This result provides an important basis for revealing the late Indosinian tectonic environment and dynamic mechanism of the East Kunlun orogenic belt. |
| |
| Keywords: | LA-ICP-MS zircon U-Pb dating tectonic significance post-collision eastern segment of East Kunlun Yikeguole |
| 本文献已被 维普 等数据库收录！ |
|
