Methane-derived authigenic carbonate from the lower Doushantuo Formation of South China: Implications for seawater sulfate concentration and global carbon cycle in the early Ediacaran ocean

Methane-derived authigenic carbonate from the lower Doushantuo Formation of South China: Implications for seawater sulfate concentration and global carbon cycle in the early Ediacaran ocean

Authigenic carbonate associated with anaerobic oxidation of methane (AOM), usually via microbial sulfate reduction (MSR) or ferric iron reduction, is generally characterized by extremely low δ13C values (

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Veröffentlicht in:Palaeogeography, palaeoclimatology, palaeoecology palaeoclimatology, palaeoecology, 2016-11, Vol.461, p.145-155
Hauptverfasser: Zhou, Chuanming, Guan, Chengguo, Cui, Huan, Ouyang, Qing, Wang, Wei
Format: Artikel
Sprache:eng
Schlagworte:
Anaerobic oxidation of methane
Carbon cycle
Carbon isotope chemostratigraphy
Cold seep deposits
Marine
Microbial sulfate reduction
Sulfur cycle
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container_title Palaeogeography, palaeoclimatology, palaeoecology
container_volume 461
creator Zhou, Chuanming
Guan, Chengguo
Cui, Huan
Ouyang, Qing
Wang, Wei
description Authigenic carbonate associated with anaerobic oxidation of methane (AOM), usually via microbial sulfate reduction (MSR) or ferric iron reduction, is generally characterized by extremely low δ13C values (
doi_str_mv 10.1016/j.palaeo.2016.08.017
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Our observations not only provide direct evidence for the involvement of AOM during carbonate precipitation in the early Ediacaran (~635Ma), but also suggest that the seawater sulfate concentrations in the early Ediacaran may have been higher than previously thought. •Authigenic carbonate (δ13C down to –38.1 ‰) occurs in lower Doushantuo Formation.•Anaerobic oxidation of methane driven by microbial sulfate reduction.•Occurrence of authigenic carbonate suggests higher seawater sulfate concentration.•Involvement of authigenic carbonate complicates global δ13C chemostratigraphy.</abstract><pub>Elsevier B.V</pub><doi>10.1016/j.palaeo.2016.08.017</doi><tpages>11</tpages><oa>free_for_read</oa></addata></record>
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subjects Anaerobic oxidation of methane
Carbon cycle
Carbon isotope chemostratigraphy
Cold seep deposits
Marine
Microbial sulfate reduction
Sulfur cycle
title Methane-derived authigenic carbonate from the lower Doushantuo Formation of South China: Implications for seawater sulfate concentration and global carbon cycle in the early Ediacaran ocean
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