Magnetic polarity stratigraphy, provenance, and paleoclimate analysis of Cenozoic strata in the Qaidam Basin, NE Tibetan Plateau
Magnetic polarity stratigraphy, provenance, and paleoclimate analysis of Cenozoic strata in the Qaidam Basin, NE Tibetan Plateau
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青藏高原东北柴达木盆地新生代地层磁极性地层学、物源及古气候分析
DOI：
10.1130/b35175.1
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发表时间：
2019
影响因子：
4.9
通讯作者：
Pfaff Katharina
中科院分区：
文献类型：
--
作者：
Nie Junsheng;Ren Xueping;Saylor Joel E.;Su Qingda;Horton Brian K.;Bush Meredith A.;Che Wenhan;Pfaff Katharina
柴达木盆地东北缘祁连-南山冲断带的发育和变形历史是检验印支-亚洲碰撞过程中青藏高原隆升模式的重要依据。然而，存在争议的开始隆升和折返的祁连南山，时间估计从早古新世到晚中新世。对祁连山-南山南段大红沟剖面新生代河湖相地层进行了磁性地层学、磁化率各向异性、物源和古气候（利用环境磁学参数）综合分析。结果被解释为证明早中新世（约。20 Ma）开始沉积堆积，碎屑沉积物最初来源于祁门高原南部。约10年后，沉积物源转向祁连山地区的北方。18.5 Ma，与祁连山的初始隆升和折返相一致。此后，又有两次物源迁移，表明祁连-南山变形向南扩展。由于祁连山-南山地形向南的发展，约1000年后降水量增加。11 Ma在研究地点由于地形拦截的水分从南方。这项工作提高了我们对柴达木盆地的沉积时代，沉积物来源和古气候历史的认识，并揭示了祁连山-南山变形和隆升的长期历史，这可能在晚中新世加速。
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.
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影响因子：
3.5
作者：
B. Ritts;A. Hanson;D. Zinniker;J. Moldowan
通讯作者：
B. Ritts;A. Hanson;D. Zinniker;J. Moldowan
DOI：
--
发表时间：
2012
期刊：
--
影响因子：
--
作者：
M. Saltzman;E. Thomas
通讯作者：
M. Saltzman;E. Thomas
影响因子：
4.9
作者：
J. Davis;R. C. Lohmann;F. Phillips;John L. Wilson;D. Love
通讯作者：
J. Davis;R. C. Lohmann;F. Phillips;John L. Wilson;D. Love
DOI：
10.1016/j.palaeo.2007.06.007
发表时间：
2007-10
期刊：
Palaeogeography, Palaeoclimatology, Palaeoecology
影响因子：
--
作者：
Xiaoming Wang;Z. Qiu;Qiang Li;Banyue. Wang;Zhanxiang Qiu;W. Downs;Guangpu Xie;Junyi Xie;T. D
通讯作者：
Xiaoming Wang;Z. Qiu;Qiang Li;Banyue. Wang;Zhanxiang Qiu;W. Downs;Guangpu Xie;Junyi Xie;T. D
DOI：
10.1002/2015jb012689
发表时间：
2016-04
期刊：
Journal of Geophysical Research: Solid Earth
影响因子：
--
作者：
Weitao Wang;Peizhen Zhang;J. Pang;C. Garzione;Huiping Zhang;Caicai Liu;D. Zheng;Wenjun Zheng
通讯作者：
Weitao Wang;Peizhen Zhang;J. Pang;C. Garzione;Huiping Zhang;Caicai Liu;D. Zheng;Wenjun Zheng