干旱区生态环境知识资源中心(Arid): Trace element and isotope geochemistry of macroelongatoolithid eggs as an indicator of palaeoenvironmental reconstruction from the Late Cretaceous Xixia Basin, China

Arid

DOI	10.1016/j.cretres.2020.104373
	Trace element and isotope geochemistry of macroelongatoolithid eggs as an indicator of palaeoenvironmental reconstruction from the Late Cretaceous Xixia Basin, China
	He, Qing 1; Yang, Sen 1; Jia, Songhai 2; Xu, Li 2; Xing, Lida 3,4; Gao, Diansong 2; Liu, Di 2; Gao, Yongli 2; Zheng, Yalin 2
通讯作者	Jia, Songhai
来源期刊	CRETACEOUS RESEARCH
ISSN	0195-6671
EISSN	1095-998X
出版年	2020
卷号	109
英文摘要	The trace elements and isotopic compositions of macroelongatoolithid eggshells provide insights into the palaeoenvironment of these huge eggs preservation. We analysed the geochemical characteristics of newly discovered macroelongatoolithid eggs from the early Cretaceous Zhaoying Formation in the Xixia Basin, Henan Province, China. X-ray diffraction results reveal that the minerals of these eggs are predominately composed of calcite. The major elements in eggshells are Ca, Mg, K, Na, Al, Fe and Ti, and trace elements mainly include Sr, Ba, Mn, La, As, Sc, V, Cr, Co, Ni, Cu, Pb, Zn, Cd, U, and Ir. The high Sr and Ir concentrations could be caused by food materials and drinking water of dinosaurs. delta C-13 values of eggshells varying between -7.19 parts per thousand and -5.08 parts per thousand (average -5.69 parts per thousand) indicate the C3 plants for dinosaurs with relatively high atmospheric CO2 concentration and low mean annual precipitation (MAP); further researches show that the carbon isotopic composition of atmospheric CO2 was around -4.11 parts per thousand to -2.19 parts per thousand, and the MAP was lower than 10 mm/yr. delta C-13 values varying between -5.72 parts per thousand and - 3.28 parts per thousand (average -4.53 parts per thousand) show the temperature of nesting area were about 23 degrees C and the drinking water was dominated by leaf water with few meteoric water. The palaeoenvironment in which these huge eggs were preserved could be interpreted as continental deposit with extremely arid climate in the early Late Cretaceous Xixia Basin based on the high Fe contents of eggshells, the low palaeoclimate index of surrounding rocks, and the extremely low MAP shown by oxygen isotope. (C) 2020 Elsevier Ltd. All rights reserved.
英文关键词	Trace element Isotopes Dinosaur eggs Late cretaceous Xixia basin
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000518872500018
WOS关键词	DINOSAUR EGGSHELL ; NANXIONG BASIN ; HATEG BASIN ; C3 PLANTS ; PALEOSOLS ; CLIMATE ; BEARING ; RECORD ; C-13
WOS类目	Geology ; Paleontology
WOS研究方向	Geology ; Paleontology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/314292
作者单位	1.Anhui Univ, Sch Resources & Environm Engn, Hefei 230601, Anhui, Peoples R China; 2.Henan Geol Museum, Zhengzhou 450016, Henan, Peoples R China; 3.China Univ Geosci, State Key Lab Biogeol & Environm Geol, Beijing 100083, Peoples R China; 4.China Univ Geosci, Sch Earth Sci & Resources, Beijing 100083, Peoples R China
推荐引用方式 GB/T 7714	He, Qing,Yang, Sen,Jia, Songhai,et al. Trace element and isotope geochemistry of macroelongatoolithid eggs as an indicator of palaeoenvironmental reconstruction from the Late Cretaceous Xixia Basin, China[J],2020,109.
APA	He, Qing.,Yang, Sen.,Jia, Songhai.,Xu, Li.,Xing, Lida.,...&Zheng, Yalin.(2020).Trace element and isotope geochemistry of macroelongatoolithid eggs as an indicator of palaeoenvironmental reconstruction from the Late Cretaceous Xixia Basin, China.CRETACEOUS RESEARCH,109.
MLA	He, Qing,et al."Trace element and isotope geochemistry of macroelongatoolithid eggs as an indicator of palaeoenvironmental reconstruction from the Late Cretaceous Xixia Basin, China".CRETACEOUS RESEARCH 109(2020).