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El análisis estadístico de los datos geoquímicos del hierro sugiere una oxigenación tardía limitada del Proterozoico

Erik A Sperling¹, Charles J Wolock², Alex S Morgan³

¹1] Department of Earth and Planetary Sciences, Harvard University, Cambridge, Massachusetts 02138, USA [2] Integrative Oceanography Division, Scripps Institution of Oceanography, La Jolla, California 90089, USA.

|July 24, 2015

Resumen

Los océanos del Proterozoico medio eran anóxicos y ferruginosos, no euxínicos. Los primeros animales enfrentaron un estrés mínimo de sulfuro, y la oxigenación significativa probablemente ocurrió más tarde en el Paleozoico, no en el Proterozoico.

Área de la Ciencia:

Geoquímica
Paleoceanografía
La evolución de los animales

Sus antecedentes:

La transición Proterozoico-Fanerozoico está relacionada con el cambio climático, el aumento del oxígeno y la diversificación animal.
Se supone que los cambios de redox en los antiguos océanos impulsan las tendencias de biodiversidad.
Los proxies geoquímicos, particularmente los basados en hierro, son cruciales para reconstruir las condiciones redox marinas pasadas.

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