Portal de Periódicos da CAPES

Evidence of a large δ13Ccarb and δ13Corg depth gradient for deep-water anoxia during the late Cambrian SPICE event

2018; Geological Society of America; Volume: 46; Issue: 7 Linguagem: Inglês

10.1130/g40231.1

1943-2682

Dandan Li, Xiaolin Zhang, Dongping Hu, Xiaohong Chen, Wei Huang, Xu Zhang, Menghan Li, Liping Qin, Shanchi Peng, Yanan Shen,

Geological and Geophysical Studies

Research Article| June 12, 2018 Evidence of a large δ13Ccarb and δ13Corg depth gradient for deep-water anoxia during the late Cambrian SPICE event Dandan Li; Dandan Li 1School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China Search for other works by this author on: GSW Google Scholar Xiaolin Zhang; Xiaolin Zhang 1School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China Search for other works by this author on: GSW Google Scholar Dongping Hu; Dongping Hu 1School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China Search for other works by this author on: GSW Google Scholar Xiaoyan Chen; Xiaoyan Chen 1School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China Search for other works by this author on: GSW Google Scholar Wei Huang; Wei Huang 1School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China Search for other works by this author on: GSW Google Scholar Xu Zhang; Xu Zhang 1School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China Search for other works by this author on: GSW Google Scholar Menghan Li; Menghan Li 1School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China Search for other works by this author on: GSW Google Scholar Liping Qin; Liping Qin 1School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China Search for other works by this author on: GSW Google Scholar Shanchi Peng; Shanchi Peng 2Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing 210008, China Search for other works by this author on: GSW Google Scholar Yanan Shen Yanan Shen * 1School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China *E-mail: yashen@ustc.edu.cn Search for other works by this author on: GSW Google Scholar Geology (2018) 46 (7): 631–634. https://doi.org/10.1130/G40231.1 Article history received: 18 Sep 2017 rev-recd: 24 May 2018 accepted: 25 May 2018 first online: 12 Jun 2018 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Dandan Li, Xiaolin Zhang, Dongping Hu, Xiaoyan Chen, Wei Huang, Xu Zhang, Menghan Li, Liping Qin, Shanchi Peng, Yanan Shen; Evidence of a large δ13Ccarb and δ13Corg depth gradient for deep-water anoxia during the late Cambrian SPICE event. Geology 2018;; 46 (7): 631–634. doi: https://doi.org/10.1130/G40231.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract The Upper Cambrian Steptoean Positive Carbon Isotope Excursion (SPICE, ca. 497 to 493 Ma) is characterized by a globally observed positive δ13C excursion of ∼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 δ13Ccarb and δ13Corg 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 δ13Ccarb and δ13Corg gradient, showing decreasing δ13C values with increasing water depth. The changes of δ13C in South China are in contrast to comparable facies-dependent δ13C data from the central Missouri (USA) intrashelf basin, which show increasing δ13C 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. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.