New Paleomagnetic and Stable-Isotope Results from the Nanxiong Basin, China: Implications for the K/T Boundary and the Timing of Paleocene Mammalian Turnover

IVPP-IR > 中科院古脊椎所（2000年以后）

	New Paleomagnetic and Stable-Isotope Results from the Nanxiong Basin, China: Implications for the K/T Boundary and the Timing of Paleocene Mammalian Turnover
	Clyde, William C.1; Ting, Suyin 2; Snell, Kathryn E.3; Bowen, Gabriel J.4; Tong, Yongsheng 5; Koch, Paul L.3; Li, Qian 5; Wang, Yuanqing 5; will.clyde@unh.edu
	2010-03-01
发表期刊	JOURNAL OF GEOLOGY
ISSN	0022-1376
卷号	118 期号:2 页码:131-143
文章类型	Article
摘要	The Nanxiong Basin (Guangdong Province, China) preserves the most complete Asian stratigraphic record of the Cretaceous-Paleogene (K/Pg) boundary extinction and the subsequent Paleocene mammalian radiation. Despite extensive study, the precise placement of the K/Pg boundary in the Nanxiong Basin sequence has been controversial, and the timing of subsequent mammalian turnover is poorly constrained. We present new paleomagnetic and geochemical data from the Late Cretaceous Pingling Formation (Nanxiong Group) and the overlying Paleocene Shanghu, Nongshan, and Guchengcun formations (Luofozhai Group). Our samples are directly correlated with previous geochemical and paleontological sampling localities, allowing for easy comparison with other local proxy records. Results indicate that the traditional placement of the K/Pg boundary at the base of a chaotic channel sandstone bed marking the highest stratigraphic appearance of dinosaur eggshell fragments and lowest stratigraphic appearance of Paleocene mammalian fossils lies about two-thirds of the way up Chron C29R, consistent with the placement of the boundary in all other well-documented sections. The average carbon isotope composition of paleosol carbonates decreases by >2 parts per thousand in the Early Paleocene, consistent with a major disruption to global carbon cycling after the K/Pg boundary. Constraints on the age of the first major Cenozoic mammalian turnover event in Asia (the Shanghuan-Nongshanian Asian Land Mammal Age boundary) support its placement near the top of Chron C27N, which coincides with a similar turnover in North America and geochemical changes recorded in several deep sea cores.
关键词	Cretaceous-tertiary Boundary Dinosaur Eggshells Mass Extinction Paleogene Recovery Magnetostratigraphy Evolution Province Section
WOS标题词	Science & Technology ; Physical Sciences
URL	查看原文
关键词[WOS]	CRETACEOUS-TERTIARY BOUNDARY ; DINOSAUR EGGSHELLS ; MASS EXTINCTION ; PALEOGENE ; RECOVERY ; MAGNETOSTRATIGRAPHY ; EVOLUTION ; PROVINCE ; SECTION
收录类别	SCI
语种	英语
WOS研究方向	Geology
WOS类目	Geology
WOS记录号	WOS:000273917300002
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/4591
专题	中科院古脊椎所（2000年以后）
通讯作者	will.clyde@unh.edu
作者单位	1.Univ New Hampshire, Dept Earth Sci, Durham, NH 03824 USA 2.Louisiana State Univ, Museum Nat Sci, Baton Rouge, LA 70803 USA 3.Univ Calif Santa Cruz, Dept Earth & Planetary Sci, Santa Cruz, CA 95064 USA 4.Purdue Univ, Dept Earth & Atmospher Sci, W Lafayette, IN 47907 USA 5.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Beijing 100044, Peoples R China
推荐引用方式 GB/T 7714	Clyde, William C.,Ting, Suyin,Snell, Kathryn E.,et al. New Paleomagnetic and Stable-Isotope Results from the Nanxiong Basin, China: Implications for the K/T Boundary and the Timing of Paleocene Mammalian Turnover[J]. JOURNAL OF GEOLOGY,2010,118(2):131-143.
APA	Clyde, William C..,Ting, Suyin.,Snell, Kathryn E..,Bowen, Gabriel J..,Tong, Yongsheng.,...&will.clyde@unh.edu.(2010).New Paleomagnetic and Stable-Isotope Results from the Nanxiong Basin, China: Implications for the K/T Boundary and the Timing of Paleocene Mammalian Turnover.JOURNAL OF GEOLOGY,118(2),131-143.
MLA	Clyde, William C.,et al."New Paleomagnetic and Stable-Isotope Results from the Nanxiong Basin, China: Implications for the K/T Boundary and the Timing of Paleocene Mammalian Turnover".JOURNAL OF GEOLOGY 118.2(2010):131-143.