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La evolución de la fábrica de carbonato marino
Jiuyuan Wang1, Lidya G Tarhan2, Andrew D Jacobson3
1Department of Earth and Planetary Sciences, Yale University, New Haven, CT, USA. jiuyuan.wang@yale.edu.
Nature
|February 22, 2023
Resumen
La formación de carbonatos marinos es clave para el ciclo del carbono de la Tierra. Los nuevos datos de isótopos de estroncio sugieren que los carbonatos de agua porosa del Precámbrico fueron los principales sumideros, impactando la química del océano.
Área de la Ciencia:
- Geoquímica
- Biogeoquímica marina
- Paleoceanografía
Sus antecedentes:
- La formación de carbonatos marinos es la vía principal para devolver el carbono de la atmósfera oceánica a la Tierra sólida.
- La fábrica de carbonato marino moldea críticamente los ciclos biogeoquímicos del océano.
- Existen datos empíricos limitados sobre la evolución histórica de la fábrica de carbonato marino.
Objetivo del estudio:
- Para proporcionar nuevos conocimientos sobre la evolución de la fábrica de carbonato marino.
- Para reconstruir los cambios en los estados de saturación mineral de carbonato a lo largo del tiempo geológico.
- Para investigar el papel de los diferentes sumideros de carbonato a lo largo de la historia de la Tierra.
Principales métodos:
- Análisis de los isótopos estables del estroncio en los archivos marinos.
- Modelado geoquímico de la precipitación y disolución de carbonatos.
- Reconstrucción de la química del océano pasado y estados de saturación.
Principales resultados:
- Los datos de isótopos de estroncio sugieren que la producción de carbonato autogénico en las aguas porosas puede haber sido un sumidero significativo durante el precámbrico.
- La aparición de la fábrica de carbonato esquelético probablemente disminuyó los estados de saturación de carbonato en el agua de mar.
- Se justifica la reevaluación de los sumideros de carbonato marinos dominantes a lo largo de la historia de la Tierra.
Conclusiones:
- La evolución de la fábrica de carbonato marino ha variado significativamente en el tiempo geológico.
- La producción de carbonato de agua porosa puede haber desempeñado un papel más importante de lo que se suponía anteriormente.
- Comprender los cambios pasados en el ciclo de carbonato es crucial para predecir la química futura del océano.
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