Rare earth element geochemistry of bone beds from the Lower Cretaceous Zhonggou Formation of Gansu Province, China

doi:10.1080/02724634.2017.1400441

IVPP-IR > 中科院古脊椎所（2000年以后）

	Rare earth element geochemistry of bone beds from the Lower Cretaceous Zhonggou Formation of Gansu Province, China
	Suarez, Celina A.1; Morschhauser, Eric M.2,3; Suarez, Marina B.4; You, Hailu5 ; Li, Daqing 6; Dodson, Peter 2,7
	2018-12-13
发表期刊	JOURNAL OF VERTEBRATE PALEONTOLOGY
ISSN	0272-4634
卷号	38 期号:0 页码:22-35
摘要	Auroraceratops rugosus from the Lower Cretaceous Zhonggou Formation, Gansu Province, China is characterized by exquisite external preservation of articulated, often ventrolaterally curled remains found in discrete locations several to hundreds of meters apart. This has prompted a hypothesis that the remains are the result of recurring die-offs and rapid burial in burrows. To test this, rare earth element (REE) concentrations were measured from Auroraceratops bones and surrounding red-bed mudstones via inductively coupled plasma mass spectrometry. Petrographic analysis was conducted to understand the preservation of the bones and surrounding rock. Results suggest early postmortem deterioration of the bone by bacteria and/or fungal hyphae (Wedl type I tunneling and mineralized remains) and mineralization of hyphae in acidic/reducing conditions. This is supported by Ce-enriched, filamentous ferromanganese oxide coatings on the external and internal bone cavities. Deterioration/dissolution of the bone must have ceased for a period of time, and we suggest that desiccation of the carcasses halted the deterioration of bone. A second mineralization phase occurred as remains came into contact with vadose water, as evident by precipitation of micritic calcite, recrystallization of filamentous apatite in the bone matrix, and bone REE patterns indicating equilibration with alkaline/oxidized fluids. Despite poor histologic preservation, the well-articulated, curled-up positioning of the remains, and similarity to remains from the Upper Cretaceous Nemegt Formation of Mongolia, suggests that the Auroraceratops beds are the result of death in burrows in a seasonally arid environment. The similar taphonomic mode to remains from Nemegt may represent a common preservation mode for faunas from extensional basin deposits.
DOI	10.1080/02724634.2017.1400441
关键词[WOS]	TRACE-ELEMENTS ; VERTEBRATE FOSSILS ; TAPHONOMY ; DINOSAUR ; APATITE ; FOSSILIZATION ; GROUNDWATERS ; SIGNATURES ; COMPLEXES ; CHEMISTRY
收录类别	SCI
语种	英语
资助项目	National Science Foundation (NSF)[NSF-EAR 1024671] ; NSF Postdoctoral Fellowship[NSF-EAR 1049528] ; National Natural Science Foundation of China[40672007] ; National Natural Science Foundation of China[41072019] ; Hundred Talents Project of the Chinese Academy of Sciences
WOS研究方向	Paleontology
WOS类目	Paleontology
WOS记录号	WOS:000474619400003
出版者	TAYLOR & FRANCIS INC
引用统计	被引频次：10[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/311034/9982
专题	中科院古脊椎所（2000年以后）
通讯作者	Suarez, Celina A.
作者单位	1.Univ Arkansas, Dept Geosci, Fayetteville, AR 72701 USA 2.Univ Penn, Dept Earth & Environm Sci, 340 South 33rd St 251 Hayden Hall, Philadelphia, PA 19104 USA 3.Indiana Univ Penn, Dept Biol, Weyandt Hall Room 114,975 Oakland Ave, Indiana, PA 15705 USA 4.Univ Texas San Antonio, Dept Geol Sci, San Antonio, TX 78249 USA 5.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Vertebrate Evolut & Human Origins, Beijing 100044, Peoples R China 6.Gansu Agr Unniv, Lab Vertebrate Evolut & Fossil Conservat Technol, 1 Yingmencun, Lanzhou 730070, Gansu, Peoples R China 7.Univ Penn, Sch Vet Med, Philadelphia, PA 19104 USA
推荐引用方式 GB/T 7714	Suarez, Celina A.,Morschhauser, Eric M.,Suarez, Marina B.,et al. Rare earth element geochemistry of bone beds from the Lower Cretaceous Zhonggou Formation of Gansu Province, China[J]. JOURNAL OF VERTEBRATE PALEONTOLOGY,2018,38(0):22-35.
APA	Suarez, Celina A.,Morschhauser, Eric M.,Suarez, Marina B.,You, Hailu,Li, Daqing,&Dodson, Peter.(2018).Rare earth element geochemistry of bone beds from the Lower Cretaceous Zhonggou Formation of Gansu Province, China.JOURNAL OF VERTEBRATE PALEONTOLOGY,38(0),22-35.
MLA	Suarez, Celina A.,et al."Rare earth element geochemistry of bone beds from the Lower Cretaceous Zhonggou Formation of Gansu Province, China".JOURNAL OF VERTEBRATE PALEONTOLOGY 38.0(2018):22-35.

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