Was the Ediacaran Shuram Excursion a globally synchronized early diagenetic event? Insights from methane-derived authigenic carbonates in the uppermost Doushantuo Formation, South China
Pulses of methane-derived authigenic carbonates formation An early diagenetic origin for the Shuram Excursion Sulfate-methane transition zone near the seafloor Positive δ13C–δ18O correlation due to early authigenic mineralization