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Evidence of a large delta C-13(carb) and delta C-13(org) depth gradient for deep-water anoxia during the late Cambrian SPICE event
Li, Dandan1; Zhang, Xiaolin1; Hu, Dongping1; Chen, Xiaoyan1; Huang, Wei1; Zhang, Xu1; Li, Menghan1; Qin, Liping1; Peng, Shanchi (彭善池)2; Shen, Yanan1
2018-07
Source PublicationGEOLOGY
ISSN0091-7613
Volume46Issue:7Pages:631-634
Abstract

The Upper Cambrian Steptoean Positive Carbon Isotope Excursion (SPICE, ca. 497 to 493 Ma) is characterized by a globally observed positive delta C-13 excursion of similar to 4% to 6%. Late Cambrian strata of South China, consisting of thick carbonate rocks with an excellent fossil record, provide key sedimentary successions for characterizing the SPICE and understanding its paleoenvironmental significance. Here we present high-resolution paired delta C-13 (carb) and delta C-13(org) data from three broadly regional late Cambrian (Furongian) sections that were deposited along a shelf margin-slope transect in South China. Our data exhibit an apparent paleobathymetry-dependent delta C-13(carb) and delta C-13(org) gradient, showing decreasing delta C-13 values with increasing water depth. The changes of delta C-13 in South China are in contrast to comparable facies-dependent delta C-13 data from the central Missouri (USA) intrashelf basin, which show increasing delta C-13 values with increasing water depth, but in a shallower paleoenvironmental system. The facies-dependent carbon-isotopic data from South China suggest enhanced burial rates of organic carbon, and may have important implications for understanding changes in paleo-redox conditions and their potential link to the mass extinction.

DOI10.1130/G40231.1
Indexed BySCI
Language英语
WOS Research AreaGeology
WOS SubjectGeology
WOS IDWOS:000436464200014
PublisherGEOLOGICAL SOC AMER, INC
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.nigpas.ac.cn/handle/332004/22610
Collection中国科学院南京地质古生物研究所
其他
Affiliation1.Univ Sci & Technol China, Sch Earth & Space Sci, Hefei 230026, Anhui, Peoples R China;
2.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, Nanjing 210008, Jiangsu, Peoples R China
Recommended Citation
GB/T 7714
Li, Dandan,Zhang, Xiaolin,Hu, Dongping,et al. Evidence of a large delta C-13(carb) and delta C-13(org) depth gradient for deep-water anoxia during the late Cambrian SPICE event[J]. GEOLOGY,2018,46(7):631-634.
APA Li, Dandan.,Zhang, Xiaolin.,Hu, Dongping.,Chen, Xiaoyan.,Huang, Wei.,...&Shen, Yanan.(2018).Evidence of a large delta C-13(carb) and delta C-13(org) depth gradient for deep-water anoxia during the late Cambrian SPICE event.GEOLOGY,46(7),631-634.
MLA Li, Dandan,et al."Evidence of a large delta C-13(carb) and delta C-13(org) depth gradient for deep-water anoxia during the late Cambrian SPICE event".GEOLOGY 46.7(2018):631-634.
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