Estudios Geológicos, Vol 75, No 2 (2019)

Desequilibrio del ciclo del azufre y cambio ambiental durante el Período Ediacárico


https://doi.org/10.3989/egeol.43605.569

G. A. Shields
Department of Earth Sciences, University College London, Reino Unido
orcid https://orcid.org/0000-0002-7828-3966

B. J.W. Mills
School of Earth and Environment, University of Leeds, Reino Unido
orcid https://orcid.org/0000-0002-9141-0931

Resumen


Se propone aquí un enfoque diferente para resolver el problema de las excursiones quimioestratigráficas negativas durante el Ediacárico, considerándolas en términos de un sistema vinculado de carbono-sulfuro-oxígeno, en el que los cambios en la dinámica de los oxidantes causarían un exceso de oxidación de carbono orgánico sobre el enterramiento, lo que resultaría en un depósito menor de DOM. La cantidad de oxidante requerida para lograr una excursión isotópica de carbono negativa a través de la oxidación de carbono orgánico neto puede resultar razonablemente de la disolución de evaporitaa a escala de cuenca.

Palabras clave


Isótopos de carbono; Isótopos de azufre; Balance biogeoquímico; Ediacárico

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Referencias


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