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DOI | 10.1130/B35388.1 |
Structural analysis and tectonic evolution of the western domain of the Eastern Kunlun Range, northwest Tibet | |
Wu, Chen1; Liu, Changfeng1; Fan, Suoya2; Zuza, Andrew, V3; Ding, Lin4; Liu, Wencan1; Ye, Baoying1; Yang, Shijie5; Zhou, Zhiguang1 | |
2020-05-01 | |
发表期刊 | GEOLOGICAL SOCIETY OF AMERICA BULLETIN |
ISSN | 0016-7606 |
EISSN | 1943-2674 |
出版年 | 2020 |
卷号 | 132期号:5-6页码:1291-1315 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; USA |
英文摘要 | The Tibetan Plateau, the largest highland on Earth, formed due to the collision of India-Asia over the past 50-60 m.y., and the evolution of the Tibetan Plateau impacts our knowledge of continental tectonics. Examination of the northernmost margin of the Tibetan Plateau is key to unravelling the deformation mechanisms acting in northern Tibet. The left-slip Altyn Tagh fault system defines the northwest margin of the Tibetan Plateau, separating the Western and Eastern Kunlun Ranges in the southwest. Both Cenozoic and pre-Cenozoic crustal deformation events at this junction between the Altyn Tagh and Kunlun Ranges were responsible for the construction of northwestern Tibet, yet the relative contribution of each phase remains unconstrained. The western domain of the Eastern Kunlun Range is marked by active NE-trending, left-slip deformation of the Altyn Tagh fault and an E-striking Cenozoic thrust system developed in response India-Asia collision. To better constrain the Paleozoic Altyn Tagh and Kunlun orogens and establish the Cenozoic structural framework, we conducted an integrated investigation involving detailed geologic mapping (similar to 1:50,000 scale), U-Pb zircon geochronology, and synthesis of existing data sets across northwestern Tibet. Our new zircon analyses from Paleoproterozoic-Cretaceous strata constrain stratigraphic age and sediment provenance and highlight Proterozoic-Paleozoic arc activity. We propose a tectonic model for the Neoproterozoic-Mesozoic evolution of northwestern Tibet wherein restoration of an similar to 56-km-long balanced cross section across the western domain of the Eastern Kunlun suggests that Cenozoic minimum shortening strain was similar to 30% (similar to 24 km shortening). Field evidence suggests this shortening commenced after ca. 25-20 Ma, which yields an average long-term shortening rate of 1.2-0.9 mm yr(-1) and strain rates of 4.7 x 10(-16) s(-1) to 2.3 x 10(-16) s(-1). Geometric considerations demonstrate that this contractional deformation did not significantly contribute to left-slip offset on the Altyn Tagh fault, which has similar to 10 mm/yr slip rates. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000530917400025 |
WOS关键词 | ALTYN-TAGH FAULT ; ZIRCON U-PB ; INDO-ASIAN COLLISION ; EARLY PALEOZOIC MAGMATISM ; VERTICAL-AXIS ROTATION ; ND ISOCHRON AGE ; QAIDAM BASIN ; SOUTH ALTYN ; NORTHERN MARGIN ; QILIAN SHAN |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/279463 |
专题 | 地球科学 |
作者单位 | 1.China Univ Geosci Beijing, Struct Geol Grp, Beijing 100083, Peoples R China; 2.Univ Houston, Dept Earth & Atmospher Sci, Houston, TX 77204 USA; 3.Univ Nevada, Nevada Bur Mines & Geol, Reno, NV 89557 USA; 4.Chinese Acad Sci, Inst Tibetan Plateau Res, POB 9825, Beijing 100085, Peoples R China; 5.Liaohe Oilfield Co, Explorat & Dev Res Inst PetroChina, Panjin 124000, Peoples R China |
推荐引用方式 GB/T 7714 | Wu, Chen,Liu, Changfeng,Fan, Suoya,et al. Structural analysis and tectonic evolution of the western domain of the Eastern Kunlun Range, northwest Tibet[J]. GEOLOGICAL SOCIETY OF AMERICA BULLETIN,2020,132(5-6):1291-1315. |
APA | Wu, Chen.,Liu, Changfeng.,Fan, Suoya.,Zuza, Andrew, V.,Ding, Lin.,...&Zhou, Zhiguang.(2020).Structural analysis and tectonic evolution of the western domain of the Eastern Kunlun Range, northwest Tibet.GEOLOGICAL SOCIETY OF AMERICA BULLETIN,132(5-6),1291-1315. |
MLA | Wu, Chen,et al."Structural analysis and tectonic evolution of the western domain of the Eastern Kunlun Range, northwest Tibet".GEOLOGICAL SOCIETY OF AMERICA BULLETIN 132.5-6(2020):1291-1315. |
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