|
|
|
| STUDY ON THE CHRONOLOGY OF GRANITIC PORPHYRY IN HORQIN YOUYI ZHONGQI, INNER MONGOLIA |
| YANG Xiao-ping1, SONG Wei-min1,2,3, PANG Xue-jiao1, NA Fu-chao1, LIU Ying-cai1, TAO Nan1, FU Jun-yu1,3, SUN Wei1, WANG Yan1 |
1. Shenyang Institute of Geology and Mineral Resources, CGS, Shenyang 110034, China;
2. College of Resources and Environmental Engineering, Northeastern University, Shenyang 110819, China;
3. The Eastern Continental Margin Research Center, CGS, Shenyang 110034, China |
|
|
|
|
Abstract The isotopic chronological study indicates that the LA-ICP-MS zircon U-Pb weighted-average age of the granitic porphyry in Horqin Youyi Zhongqi, Inner Mongolia, is 163.3±2.9 Ma, suggesting the rock body emplaced at the late period of Middle Jurassic. Characterized by A-type granite, the granitic porphyry represents extensional tectonic magmatic activity. Combining the regional geological data and previous research, the Middle Jurassic granitic porphyry is possibly the product of post-orogenic extensional environment. The determination of its phases can provide new data for the formation and evolution of Songliao Basin.
|
|
Received: 29 March 2017
|
|
|
|
|
|
|
|
|
2017, Vol. 26 
