Carbonate lithium isotope systematics indicate cooling triggered mass extinction during the Frasnian-Famennian transition

doi:10.1016/j.gloplacha.2023.104284

NIGPAS OpenIR

	Carbonate lithium isotope systematics indicate cooling triggered mass extinction during the Frasnian-Famennian transition
通讯作者	Xiao, Yilin(ylxiao@ustc.edu.cn) ; Chen, Bo(chenbo@nigpas.ac.cn)
	Wang, Yang -Yang 1; Liang, Kun2 ; Xiao, Yilin 1,3; Chen, Bo2 ; Shan, Erhao 1; Yang, Tingyu 1; Zhang, Meng 1; Sun, He 4; Gu, Hai-Ou 4; Tong, Fengtai 1
	2023-11-01
发表期刊	GLOBAL AND PLANETARY CHANGE
ISSN	0921-8181
卷号	230 页码:12
摘要	We present comprehensive Li-C-Sr isotopic studies on two classic marine carbonate sections (Yangdi and Dongcun) transecting the Late Devonian Frasnian-Famennian (F-F) boundary from South China to constrain the causes of the F-F mass extinction. Both sections show positive Li and C isotopic excursions in carbonate and unchanged conodont 87Sr/86Sr ratios across the F-F boundary. Low Li/Ca and Sr/Ca ratios, but heavy Li isotope composition (87Li) of the Dongcun section indicate possible diagenetic alteration on carbonate Li isotopic re-cords. By contrast, the Yangdi section records more primary seawater 87Li signal, showing a -2 %o positive excursion before the F-F boundary, although reconstructed paleo-seawater 87Li values (from 11.8 +/- 1.4%o to 13.8 +/- 1.4%o) are lower than modern times. Combined box model with Monte Carlo simulation demonstrates that low seawater 87Li requires low riverine 87Li and small effective Li isotopic fractionation by marine sinks (Delta 7Lisw-ms). The latter is likely due to high silicon concentration in the paleo-seawater and rapid formation of clay minerals. Positive 87Li excursion but invariant 87Sr/86Sr ratios in the seawater are related to attenuated continental weathering (reduced riverine fluxes but increased riverine 87Li), and enlarged effective Delta 7Lisw-ms. Based on the present data we suggest that rapid climate cooling is responsible for the weathering transition and must have exerted significant influence on the marine environment. Global climate cooling weakens seawater stratification while intensifying oceanic circulation and upwelling, resulting in enhanced primary productivity, precipitation of the Kellwasser black shales and a remarkable positive C isotopic excursion in carbonate. Addi-tionally, rapid climate cooling around the F-F boundary has significantly threatened the ecological system and finally triggered mass extinction especially for the faunas adapted to warm temperatures.
关键词	Frasnian-Famennian mass extinction Lithium-carbon-strontium isotopes Attenuated continental weathering Rapid climate cooling
DOI	10.1016/j.gloplacha.2023.104284
收录类别	SCI
语种	英语
关键词[WOS]	MARINE BIOGENIC CARBONATES ; HOLY CROSS MOUNTAINS ; EXPERIMENTAL CONSTRAINTS ; GROWTH-RATE ; LI ; FRACTIONATION ; SEAWATER ; EVENT ; TEMPERATURE ; PATTERNS
资助项目	National Natural Science Foundation of China[42073003] ; National Natural Science Foundation of China[42230304] ; National Natural Science Foundation of China[42273003] ; National Natural Science Foundation of China[42272025] ; Strategic Priority Research Program (B) of CAS[XDB41000000] ; Strategic Priority Research Program (B) of CAS[XDB26000000]
WOS研究方向	Physical Geography ; Geology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号	WOS:001101759800001
项目资助者	National Natural Science Foundation of China ; Strategic Priority Research Program (B) of CAS
出版者	ELSEVIER
文献类型	期刊论文
条目标识符	http://ir.nigpas.ac.cn/handle/332004/43165
专题	中国科学院南京地质古生物研究所
通讯作者	Xiao, Yilin; Chen, Bo
作者单位	1.Univ Sci & Technol China, Sch Earth & Space Sci, CAS Key Lab Crust Mantle Mat & Environm, Hefei 230026, Peoples R China 2.Chinese Acad Sci, State Key Lab Palaeobiol & Stratig, Nanjing Inst Geol & Palaeontol, Nanjing 210008, Peoples R China 3.CAS Ctr Excellence Comparat Planetol, Hefei 230026, Peoples R China 4.Hefei Univ Technol, Sch Resources & Environm Engn, Hefei 230009, Peoples R China
推荐引用方式 GB/T 7714	Wang, Yang -Yang,Liang, Kun,Xiao, Yilin,et al. Carbonate lithium isotope systematics indicate cooling triggered mass extinction during the Frasnian-Famennian transition[J]. GLOBAL AND PLANETARY CHANGE,2023,230:12.
APA	Wang, Yang -Yang.,Liang, Kun.,Xiao, Yilin.,Chen, Bo.,Shan, Erhao.,...&Qie, Wenkun.(2023).Carbonate lithium isotope systematics indicate cooling triggered mass extinction during the Frasnian-Famennian transition.GLOBAL AND PLANETARY CHANGE,230,12.
MLA	Wang, Yang -Yang,et al."Carbonate lithium isotope systematics indicate cooling triggered mass extinction during the Frasnian-Famennian transition".GLOBAL AND PLANETARY CHANGE 230(2023):12.