Formation of Eocene-Miocene felsic magmatic rocks along N-S-trending Yardoi-Kongbugang mountain ranges in the eastern Himalaya: New insights into surface uplift and the initiation of E-W extension in southern Tibet
文献类型：期刊论文
| 作者 | Fan, Jing-Jing2,6; Zhang, Xiu-Zheng1,2,3; Ma, Lin1,2; Wang, Qiang1,2,6; Jiang, Zi-Qi5; Xia, Xiao-Ping1,2; Wei, Gang-Jian1,2; Wang, Zi-Long2,6; Zhou, Jin-Sheng1,2; Li, Qi-Wei4 |
| 刊名 | GEOLOGICAL SOCIETY OF AMERICA BULLETIN
 |
| 出版日期 | 2024 |
| 卷号 | 136期号:1-2页码:433-446 |
| ISSN号 | 0016-7606 |
| DOI | 10.1130/B36617.1 |
| 英文摘要 | Large-scale N -S shortening induced by India -Asia convergence caused the formation of numerous E-W-trending mountain ranges in Tibet. However, the mechanism(s) of formation of N-S-trending mountain ranges remains elusive. We report on a felsic magmatic belt located along the N-S-trending Yardoi-Kongbugang mountain ranges on the flank of the Cona rift in the eastern Tethyan Himalaya. Zircon and monazite geochronology and whole -rock geochemistry revealed three epochs of middle- to lower -crustal anatexis beneath the Cona rift at ca. 47-42 Ma, 35-34 Ma, and 24-14 Ma. The mid -Eocene and early Oligocene granitoids show adakitic signatures indicating continuous crustal thickening, while the formation of Miocene leucogranites and N-S-trending dacitic dikes was related to ductile crustal extension. Silicic melts were exposed along the whole rift since the early Oligocene, suggesting that the early Oligocene could be regarded as a transitional epoch from tectonic compression to orogen-parallel extension. Widespread midEocene and Miocene magmatism in the Himalaya, together with coeval metamorphic anatexis, represents two phases of crustal weakening. The weakened crustal zones under continued India -Asia convergence may have favored uplift and subsequent lateral flow of the weak zones, which initiated E -W extension. Finally, significant upwelling of the weak zones evolved into magma extrusion and formed the N-S-trending mountain ranges. This study provides new insights into the mechanisms of surface uplift and E -W extension and challenges the common view of initiation of E -W extension in southern Tibet not earlier than the early Miocene. |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001171011000008 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/77248]  |
| 专题 | 同位素地球化学国家重点实验室 |
| 通讯作者 | Zhang, Xiu-Zheng |
| 作者单位 | 1.Chinese Acad Sci, Ctr Excellence Deep Earth Sci, Guangzhou 510640, Peoples R China 2.Chinese Acad Sci, State Key Lab Isotope Geochem, Guangzhou Inst Geochem, Guangzhou 510640, Peoples R China 3.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou 510640, Peoples R China 4.China Univ Geosci, Sch Earth Sci, Wuhan 430074, Peoples R China 5.Guilin Univ Technol, Coll Earth Sci, Guilin 541004, Peoples R China 6.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Fan, Jing-Jing,Zhang, Xiu-Zheng,Ma, Lin,et al. Formation of Eocene-Miocene felsic magmatic rocks along N-S-trending Yardoi-Kongbugang mountain ranges in the eastern Himalaya: New insights into surface uplift and the initiation of E-W extension in southern Tibet[J]. GEOLOGICAL SOCIETY OF AMERICA BULLETIN,2024,136(1-2):433-446. |
| APA | Fan, Jing-Jing.,Zhang, Xiu-Zheng.,Ma, Lin.,Wang, Qiang.,Jiang, Zi-Qi.,...&Liu, Jin-Heng.(2024).Formation of Eocene-Miocene felsic magmatic rocks along N-S-trending Yardoi-Kongbugang mountain ranges in the eastern Himalaya: New insights into surface uplift and the initiation of E-W extension in southern Tibet.GEOLOGICAL SOCIETY OF AMERICA BULLETIN,136(1-2),433-446. |
| MLA | Fan, Jing-Jing,et al."Formation of Eocene-Miocene felsic magmatic rocks along N-S-trending Yardoi-Kongbugang mountain ranges in the eastern Himalaya: New insights into surface uplift and the initiation of E-W extension in southern Tibet".GEOLOGICAL SOCIETY OF AMERICA BULLETIN 136.1-2(2024):433-446. |
入库方式： OAI收割
来源：广州地球化学研究所
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