Journal ArticleDOI
Authigenic Carbonate and the History of the Global Carbon Cycle
Reads0
Chats0
TLDR
This work proposes that authigenic carbonate, produced in sediment pore fluids during early diagenesis, has played a major role in the carbon cycle in the past and presents a framework for interpreting the carbon isotopic composition of sedimentary rocks.Abstract:
We present a framework for interpreting the carbon isotopic composition of sedimentary rocks, which in turn requires a fundamental reinterpretation of the carbon cycle and redox budgets over Earth's history. We propose that authigenic carbonate, produced in sediment pore fluids during early diagenesis, has played a major role in the carbon cycle in the past. This sink constitutes a minor component of the carbon isotope mass balance under the modern, high levels of atmospheric oxygen but was much larger in times of low atmospheric O(2) or widespread marine anoxia. Waxing and waning of a global authigenic carbonate sink helps to explain extreme carbon isotope variations in the Proterozoic, Paleozoic, and Triassic.read more
Citations
More filters
Journal ArticleDOI
Heterogeneous Mg isotopic composition of the early Carboniferous limestone: implications for carbonate as a seawater archive
TL;DR: Wang et al. as mentioned in this paper measured Mg isotopic compositions of limestone samples collected from the early Carboniferous Huangjin Formation in South China, and recognized four carbonate components: micrite, marine cement, brachiopod shell, and mixture.
Journal ArticleDOI
Authigenic carbonate formation influenced by freshwater inputs and methanogenesis in coal-bearing strata offshore Shimokita, Japan (IODP site C0020)
TL;DR: In this paper, the mineralogy, elemental composition, and isotopic composition of 28 authigenic carbonate nodules recovered from coal-bearing forearc sediments offshore Shimokita Peninsula (Japan) to better understand fluid sources, diagenetic environments, and biogeochemical processes associated with subsiding sediments containing high organic carbon content.
Journal ArticleDOI
Variações isotópicas de C, O e Sr em rochas carbonáticas do Neoproterozoico-Cambriano da Formação Sete Lagoas (Grupo Bambuí), no Sul da Bacia do São Francisco, Brasil
TL;DR: In this article, high-resolution chemostratigraphic data of carbonates from the Sete Lagoas Formation (Bambui Group) show large variations on the C, O, and Sr isotope compositions.
Journal ArticleDOI
Authigenic carbonate precipitation at the end-Guadalupian (Middle Permian) in China: Implications for the carbon cycle in ancient anoxic oceans
Masafumi Saitoh,Yuichiro Ueno,Yuichiro Ueno,Yukio Isozaki,Takazo Shibuya,Jianxin Yao,Zhansheng Ji,Katsumi Shozugawa,Motoyuki Matsuo,Naohiro Yoshida +9 more
TL;DR: In this paper, the authigenic carbonates in the uppermost Guadalupian (Middle Permian) rocks at Chaotian, Sichuan, South China were analyzed.
Journal ArticleDOI
The role of the early diagenetic dolomitic concretions in the preservation of the 2.1-Ga paleoenvironmental signal: The Paleoproterozoic of the Franceville Basin, Gabon
Nathaelle Onanga Mavotchy,Abderrazak El Albani,Alain Trentesaux,Claude Fontaine,Anne-Catherine Pierson-Wickmann,Philippe Boulvais,Armelle Riboulleau,Lauriss Ngombi Pemba,Florent Pambo,François Gauthier-Lafaye +9 more
TL;DR: Dolomite concretions from Paleoproterozoic organic-rich sediments of the Franceville Basin (Francevillian) in southeastern Gabon are studied in this paper.
References
More filters
疟原虫var基因转换速率变化导致抗原变异[英]/Paul H, Robert P, Christodoulou Z, et al//Proc Natl Acad Sci U S A
TL;DR: PfPMP1)与感染红细胞、树突状组胞以及胎盘的单个或多个受体作用,在黏附及免疫逃避中起关键的作�ly.
Journal ArticleDOI
Geochim. cosmochim. acta
Journal ArticleDOI
Toward a Neoproterozoic composite carbon-isotope record
TL;DR: In this paper, a correlation scheme for the Neoproterozoic that corroborates radiometric data that indicate that there were three glacial epochs between ca. 750 and 580 Ma was proposed.
Journal ArticleDOI
Large Perturbations of the Carbon Cycle During Recovery from the End-Permian Extinction
Jonathan L. Payne,Daniel J. Lehrmann,Jiayong Wei,Michael J. Orchard,Daniel P. Schrag,Andrew H. Knoll +5 more
TL;DR: High-resolution carbon isotope measurements of multiple stratigraphic sections in south China demonstrate that the pronounced carbon isotopic excursion at the Permian-Triassic boundary was not an isolated event but the first in a series of large fluctuations that continued throughout the Early Triassic before ending abruptly early in the Middle Triassic.
Journal ArticleDOI
The abundance of 13c in marine organic matter and isotopic fractionation in the global biogeochemical cycle of carbon during the past 800 ma
TL;DR: For the later Neoproterozoic, from 800 to 543 Ma (346 analyses), from the Cambrian through the Jurassic (1616 analyses), and from the Cretaceous and Cenozoic (2493 analyses) the abundance of 13 C in marine organic matter has been compiled as discussed by the authors.