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Metal-silicate Partitioning at High Pressure and Temperature: Experimental Methods and a Protocol to Suppress Highly Siderophile Element Inclusions
Published on: June 13, 2015
Evidencia de una partición extrema del cobre en una fase de vapor magmático
Science (New York, N.Y.)
|June 7, 1991
Resumen
Los sulfuros de cobre que se encuentran en las burbujas de gas volcánico indican que el cobre se concentra en vapor dentro de cámaras de magma poco profundas. Este hallazgo es crucial para comprender las contribuciones de los metales a la atmósfera y la formación de depósitos de mineral de cobre.
Área de la Ciencia:
- La geoquímica es la geoquímica.
- Volcanología Volcanología.
- Geología económica Geología económica.
Sus antecedentes:
- Las cámaras de magma albergan diversos procesos geológicos.
- Comprender el comportamiento del metal en los sistemas magmáticos es clave para la exploración de recursos.
- Las contribuciones volcánicas a los metales atmosféricos son significativas.
Objetivo del estudio:
- Para investigar la fase en la que el cobre reside en cámaras de magma poco profundas.
- Para cuantificar las diferencias de concentración de cobre entre el vapor magmático y la fusión.
- Evaluar las implicaciones del comportamiento volátil del cobre para el ciclo atmosférico de los metales y la formación de depósitos de mineral.
Principales métodos:
- Análisis de las inclusiones de fusión alojadas en fenocristos.
- Identificación de los sulfuros de cobre dentro de las burbujas de gas.
- Análisis químico de las fases de vapor y fusión.
Principales resultados:
- Sulfuros de cobre descubiertos en burbujas de dióxido de carbono y cloro.
- El cobre se concentra en la fase de vapor dentro de las cámaras de magma poco profundas.
- El vapor magmático muestra una concentración de cobre varios cientos de veces mayor que la fusión de pantellerita coexistente.
Conclusiones:
- La residencia del cobre en el vapor magmático se confirma en ciertos sistemas de magma poco profundos.
- El comportamiento volátil del cobre es un factor crítico en el modelado de metales atmosféricos.
- Este comportamiento puede jugar un papel importante en la génesis de los depósitos de mineral de porfiro de cobre.
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