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DOI | 10.1130/B35175.1 |
Magnetic polarity stratigraphy, provenance, and paleoclimate analysis of Cenozoic strata in the Qaidam Basin, NE Tibetan Plateau | |
Nie, Junsheng1,2; Ren, Xueping1; Saylor, Joel E.3; Su, Qingda1; Horton, Brian K.4,5; Bush, Meredith A.6; Chen, Wenhan1; Pfaff, Katharina6 | |
2020 | |
发表期刊 | GEOLOGICAL SOCIETY OF AMERICA BULLETIN
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ISSN | 0016-7606 |
EISSN | 1943-2674 |
出版年 | 2020 |
卷号 | 132期号:1-2页码:310-320 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; USA |
英文摘要 | The growth and deformation history of the Qilian-Nan Shan thrust belt bounding the NE Qaidam Basin figures importantly in testing models of Tibetan Plateau uplift during the India-Asia collision. However, debate exists about the onset of uplift and exhumation of the Qilian-Nan Shan, with timing estimates ranging from early Paleocene to late Miocene. Here we report integrated analyses of magnetostratigraphy, anisotropy of magnetic susceptibility, sediment provenance, and paleoclimate (using environmental magnetic parameters) for Cenozoic fluvio-lacustrine strata from the Dahonggou section south of the Qilian-Nan Shan. The results are interpreted to demonstrate an early Miocene (ca. 20 Ma) onset of sediment accumulation in this location, with clastic sediment derived initially from the southern Qimen Tagh highland. The sediment source then switched to the northern part of the Qilian Shan region after ca. 18.5 Ma, consistent with initial uplift and exhumation of the Qilian Shan. Thereafter, two additional provenance shifts reveal progressive southward propagation of deformation in the Qilian-Nan Shan. As a result of this southward growth of Qilian-Nan Shan topography, precipitation increased after ca. 11 Ma at the study site due to orographic interception of moisture from the south. This work improves our understanding of the depositional age, sediment provenance, and paleoclimate history of the Qaidam Basin and reveals a prolonged history of Qilian-Nan Shan deformation and uplift, which may have accelerated during the late Miocene. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000505809800017 |
WOS关键词 | TECTONIC EVOLUTION ; QILIAN SHAN ; ISOTOPIC CONSTRAINTS ; PETROLEUM SYSTEMS ; SOURCE ROCKS ; UPLIFT ; GROWTH ; MARGIN ; CHINA ; MAGNETOSTRATIGRAPHY |
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/279409 |
专题 | 地球科学 |
作者单位 | 1.Lanzhou Univ, Coll Earth & Environm Sci, Minist Educ Key Lab Western Chinas Environm Syst, Lanzhou 730000, Gansu, Peoples R China; 2.Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China; 3.Univ Houston, Dept Earth & Atmospher Sci, Houston, TX 77204 USA; 4.Univ Texas Austin, Jackson Sch Geosci, Dept Geol Sci, Austin, TX 78712 USA; 5.Univ Texas Austin, Jackson Sch Geosci, Inst Geophys, Austin, TX 78712 USA; 6.Colorado Sch Mines, Dept Geol & Geol Engn, 1516 Illinois St, Golden, CO 80401 USA |
推荐引用方式 GB/T 7714 | Nie, Junsheng,Ren, Xueping,Saylor, Joel E.,et al. Magnetic polarity stratigraphy, provenance, and paleoclimate analysis of Cenozoic strata in the Qaidam Basin, NE Tibetan Plateau[J]. GEOLOGICAL SOCIETY OF AMERICA BULLETIN,2020,132(1-2):310-320. |
APA | Nie, Junsheng.,Ren, Xueping.,Saylor, Joel E..,Su, Qingda.,Horton, Brian K..,...&Pfaff, Katharina.(2020).Magnetic polarity stratigraphy, provenance, and paleoclimate analysis of Cenozoic strata in the Qaidam Basin, NE Tibetan Plateau.GEOLOGICAL SOCIETY OF AMERICA BULLETIN,132(1-2),310-320. |
MLA | Nie, Junsheng,et al."Magnetic polarity stratigraphy, provenance, and paleoclimate analysis of Cenozoic strata in the Qaidam Basin, NE Tibetan Plateau".GEOLOGICAL SOCIETY OF AMERICA BULLETIN 132.1-2(2020):310-320. |
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