Magnetostratigraphy of the Oligocene and Miocene of the Linxia Basin northwestern China

doi:10.1016/j.palaeo.2023.111404

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	Magnetostratigraphy of the Oligocene and Miocene of the Linxia Basin northwestern China
	Sun, Lu 1,2; Deng, Chenglong 2,3; Deng, Tao3,4 ; Kong, Yanfen 2; Wu, Bailing 2; Liu, Suzhen 2; Li, Qian2 ; Liu, Geng 2
	2023-03-01
发表期刊	PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
ISSN	0031-0182
卷号	613 期号:0 页码:19
摘要	The Cenozoic biochronology framework for northern China has been based on few vertebrate fossil localities with unverified age constraints. The Linxia Basin, located on the northeastern margin of the Qinghai-Tibetan Plateau, northwestern China, preserves thick, successive terrestrial sequences with an enormous quantity of vertebrate fossils of ages spanning the Late Oligocene to Early Pleistocene. This record has bearing on the definition of Cenozoic mammalian biochronology of North China, and its better dating. However, our under-standing of detailed mammalian evolution and infilling history of the Linxia Basin has been hampered by poor age constraints and disagreement with new paleontological findings. To clarify the age range of the fluvial-lacustrine deposits and their faunas in the lower part of the succession, we present here a revised magneto-stratigraphy and its chronology obtained from three well-correlated and overlapping sections in the eastern Linxia Basin. Magnetite and hematite were identified as the main ChRM (characteristic remanent magnetization) carriers in the sediments. Reliable specimens from 1142 sampled layers representing a total thickness of 484.4 m from the three sections yielded 28 normal and 23 reversed polarities. With the aid of updated biochronological constraints, the fluvial-lacustrine sequence of five stratigraphic units (Tala, Jiaozigou, Shangzhuang, Dongxiang, and Liushu/Hujialiang formations), was successfully correlated to chrons of the GPTS (geomagnetic polarity timescale). These represent the top of Chron C13r (ca. 33.8 Ma) to lower Chron C5n.2n (ca. 10.8 Ma). The recalibrated basin-infilling history shows response to episodic growth of topographic highs during these time intervals. Moreover, this new age model yields an estimated age of ca. 27 Ma (within Chron C9n of early Late Oligocene) for the paracerathere fauna from the eastern Linxia Basin, which is in accordance with other bio-chronological findings. The new age estimate for the paracerathere fauna supports a proposal for relocating the basal boundary of the Chinese Tabenbulukian Land Mammal Stage/Age to Chron C9r.
关键词	Linxia Basin Late Oligocene Paracerathere fauna Magnetostratigraphy Chinese Tabenbulukian Land Mammal Stage/Age
DOI	10.1016/j.palaeo.2023.111404
关键词[WOS]	NORTHEASTERN TIBETAN PLATEAU ; LANZHOU BASIN ; TOPOGRAPHIC GROWTH ; TERTIARY DEPOSITS ; MAMMALIAN FAUNAS ; CLAY MINERALOGY ; FORELAND BASIN ; GANSU PROVINCE ; XINING BASIN ; BUGTI HILLS
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[41504058] ; National Key Basic Research Program of China[2012CB821900] ; National Natural Science Foundation of China[41888101] ; Doctoral Scientific Research Starting Foundation of East China University of Technology[DHBK2019049]
WOS研究方向	Physical Geography ; Geology ; Paleontology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS记录号	WOS:000990795700001
出版者	ELSEVIER
引用统计	被引频次：11[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/22481
专题	中国科学院古脊椎动物与古人类研究所
通讯作者	Sun, Lu
作者单位	1.East China Univ Technol, Sch Earth Sci, Nanchang 330013, Jiangxi, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 3.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Vertebrate Evolut & Human Origins, Beijing 100044, Peoples R China
推荐引用方式 GB/T 7714	Sun, Lu,Deng, Chenglong,Deng, Tao,et al. Magnetostratigraphy of the Oligocene and Miocene of the Linxia Basin northwestern China[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2023,613(0):19.
APA	Sun, Lu.,Deng, Chenglong.,Deng, Tao.,Kong, Yanfen.,Wu, Bailing.,...&Liu, Geng.(2023).Magnetostratigraphy of the Oligocene and Miocene of the Linxia Basin northwestern China.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,613(0),19.
MLA	Sun, Lu,et al."Magnetostratigraphy of the Oligocene and Miocene of the Linxia Basin northwestern China".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 613.0(2023):19.

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