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Magnetostratigraphy of the Xiaolongtan Formation bearing Lufengpithecus keiyuanensis in Yunnan, southwestern China: Constraint on the initiation time of the southern segment of the Xianshuihe-Xiaojiang fault

文献类型：期刊论文

作者Li, Shihu1; Deng, Chenglong1; Dong, Wei2; Sun, Lu1; Liu, Suzhen1; Qin, Huafeng1; Yin, Jiyun3; Ji, Xueping4; Zhu, Rixiang1
刊名TECTONOPHYSICS
出版日期2015-08-01
卷号655页码:213-226
关键词Magnetostratigraphy Xianshuihe-xiaojiang Fault Xiaolongtan Formation Lufengpithecus Keiyuanensis Tectonic Rotation SouTheast Margin Of The Tibetan Plateau
DOI10.1016/j.tecto.2015.06.002
文献子类Article
英文摘要The late Cenozoic extensional basins in Yunnan Province (southwestern China), which are kinematically linked with the regional strike-slip faults, can provide meaningful constraints on the fault activity history and tectonic evolution of the southeast margin of the Tibetan Plateau (SEMTP), and further on the geodynamic evolution of the Tibetan Plateau. However, this has been severely impeded by the lack of precise age constraints on the timing of fault activity. To better constrain the timing of fault activity and the tectonic rotation of SEMTP, we undertook a high-resolution magnetostratigraphic study on the Xiaolongtan Formation in the Xiaolongtan Basin, which is located at the southern tip of the Xianshuihe-Xiaojiang fault and is well-known by the presence of hominoid Lufengpithecus keiyuanensis. Rock magnetic experiments indicate that magnetite is the main remanence carrier. Correlation to the geomagnetic polarity timescale was achieved by combining magnetostratigraphic and biostratigraphic data. Our correlation suggests that the Xiaolongtan Formation sedimentary sequence spans from Chron C5Ar.1r to Chron C5n.2n, which indicates that the age of the Xiaolongtan Formation ranges from similar to 10 Ma to 12.7 Ma, and that the ages of the two sedimentary layers possibly bearing the hominoid L. keiyuanensis are similar to 11.6 Ma or similar to 12.5 Ma. The basal age of the sediments is 12.7 Ma, which indicates that the activation of the southern Xianshuihe-Xiaojiang fault was initiated at this time. The overall mean paleomagnetic direction (D = 3532 degrees, I = 34.2 degrees, alpha(95) = 2.1 degrees, n = 166) documents a counter-clockwise vertical axis rotation of -8 +/- 3 degrees with respect to Eurasia, which is the response to the activity of the left-lateral Xianshuihe-Xiaojiang Fault. (C) 2015 Elsevier B.V. All rights reserved.
WOS关键词INDIA-ASIA COLLISION ; LOWER-CRUSTAL FLOW ; RIVER SHEAR ZONE ; SHAN-THAI BLOCK ; EASTERN HIMALAYAN SYNTAXIS ; FINITE STRAIN CALCULATIONS ; CHUAN DIAN FRAGMENT ; MAE MOH BASIN ; TIBETAN PLATEAU ; NORTHERN THAILAND
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:000360513800017
资助机构National Natural Science Foundation of China(41404056 ; National Natural Science Foundation of China(41404056 ; National Natural Science Foundation of China(41404056 ; National Natural Science Foundation of China(41404056 ; National Key Basic Research Program of China(2012CB821900) ; National Key Basic Research Program of China(2012CB821900) ; National Key Basic Research Program of China(2012CB821900) ; National Key Basic Research Program of China(2012CB821900) ; State Key Laboratory of Lithospheric Evolution grant(11431780) ; State Key Laboratory of Lithospheric Evolution grant(11431780) ; State Key Laboratory of Lithospheric Evolution grant(11431780) ; State Key Laboratory of Lithospheric Evolution grant(11431780) ; China Postdoctoral Science Foundation(127803) ; China Postdoctoral Science Foundation(127803) ; China Postdoctoral Science Foundation(127803) ; China Postdoctoral Science Foundation(127803) ; Chinese Academy of Sciences(KZCX2-YW-Q05-02 ; Chinese Academy of Sciences(KZCX2-YW-Q05-02 ; Chinese Academy of Sciences(KZCX2-YW-Q05-02 ; Chinese Academy of Sciences(KZCX2-YW-Q05-02 ; 41372027 ; 41372027 ; 41372027 ; 41372027 ; KZCX2-EW-117) ; KZCX2-EW-117) ; KZCX2-EW-117) ; KZCX2-EW-117) ; 20811240) ; 20811240) ; 20811240) ; 20811240) ; National Natural Science Foundation of China(41404056 ; National Natural Science Foundation of China(41404056 ; National Natural Science Foundation of China(41404056 ; National Natural Science Foundation of China(41404056 ; National Key Basic Research Program of China(2012CB821900) ; National Key Basic Research Program of China(2012CB821900) ; National Key Basic Research Program of China(2012CB821900) ; National Key Basic Research Program of China(2012CB821900) ; State Key Laboratory of Lithospheric Evolution grant(11431780) ; State Key Laboratory of Lithospheric Evolution grant(11431780) ; State Key Laboratory of Lithospheric Evolution grant(11431780) ; State Key Laboratory of Lithospheric Evolution grant(11431780) ; China Postdoctoral Science Foundation(127803) ; China Postdoctoral Science Foundation(127803) ; China Postdoctoral Science Foundation(127803) ; China Postdoctoral Science Foundation(127803) ; Chinese Academy of Sciences(KZCX2-YW-Q05-02 ; Chinese Academy of Sciences(KZCX2-YW-Q05-02 ; Chinese Academy of Sciences(KZCX2-YW-Q05-02 ; Chinese Academy of Sciences(KZCX2-YW-Q05-02 ; 41372027 ; 41372027 ; 41372027 ; 41372027 ; KZCX2-EW-117) ; KZCX2-EW-117) ; KZCX2-EW-117) ; KZCX2-EW-117) ; 20811240) ; 20811240) ; 20811240) ; 20811240)
源URL[http://ir.iggcas.ac.cn/handle/132A11/62268]  
专题地质与地球物理研究所_岩石圈演化国家重点实验室
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
2.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Beijing 100044, Peoples R China
3.Yunnan State Land Resources Vocat Coll, Kunming 650217, Yunnan, Peoples R China
4.Yunnan Inst Cultural Rel & Archeol, Dept Paleoanthropol, Kunming 650118, Peoples R China
推荐引用方式
GB/T 7714		 Li, Shihu,Deng, Chenglong,Dong, Wei,et al. Magnetostratigraphy of the Xiaolongtan Formation bearing Lufengpithecus keiyuanensis in Yunnan, southwestern China: Constraint on the initiation time of the southern segment of the Xianshuihe-Xiaojiang fault[J]. TECTONOPHYSICS,2015,655:213-226.
APA Li, Shihu.,Deng, Chenglong.,Dong, Wei.,Sun, Lu.,Liu, Suzhen.,...&Zhu, Rixiang.(2015).Magnetostratigraphy of the Xiaolongtan Formation bearing Lufengpithecus keiyuanensis in Yunnan, southwestern China: Constraint on the initiation time of the southern segment of the Xianshuihe-Xiaojiang fault.TECTONOPHYSICS,655,213-226.
MLA Li, Shihu,et al."Magnetostratigraphy of the Xiaolongtan Formation bearing Lufengpithecus keiyuanensis in Yunnan, southwestern China: Constraint on the initiation time of the southern segment of the Xianshuihe-Xiaojiang fault".TECTONOPHYSICS 655(2015):213-226.

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来源：地质与地球物理研究所

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