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Los metales de platino, los minerales de sulfuro magmático y los minerales de platino
Science (New York, N.Y.)
|June 27, 1980
Resumen
Las concentraciones de elementos del grupo del platino (PGE) en los sulfuros magmáticos están vinculadas al magma progenitor.
Área de la Ciencia:
- Geología económica Geología económica.
- La geoquímica es la geoquímica.
- Depósitos Minerales Los depósitos minerales se encuentran en los depósitos minerales.
Sus antecedentes:
- Los elementos del grupo del platino (PGE) son metales industriales críticos.
- Los depósitos de PGE se forman principalmente a partir de fundiciones segregadas de sulfuro de hierro-níquel-cobre.
- Las concentraciones de PGE en los sulfuros varían ampliamente, a diferencia de otros elementos calcófilos.
Objetivo del estudio:
- Para explicar la variabilidad en las concentraciones de PGE dentro de los sulfuros magmáticos.
- Para establecer la relación entre las proporciones de PGE y las características de magma de origen.
- Para investigar los procesos geológicos que controlan la distribución de PGE en los depósitos de mineral.
Principales métodos:
- Análisis de las concentraciones de PGE en sulfuros magmáticos en varios depósitos.
- Correlación de las proporciones relativas de PGE con la composición de magma de origen.
- Modelado de procesos de fusión parcial, de equilibrio de lotes y de segregación fraccionada.
Principales resultados:
- Las concentraciones de PGE en los sulfuros abarcan cinco órdenes de magnitud.
- Las proporciones relativas de PGE se correlacionan sistemáticamente con el tipo de magma original.
- El grado de fusión parcial del manto y los procesos de segregación de sulfuro explican las concentraciones observadas.
Conclusiones:
- La formación de depósitos de sulfuro magmáticos ricos en PGE está controlada por el grado de fusión del manto y la segregación de sulfuro.
- Comprender estos procesos es clave para explorar nuevos recursos de PGE.
- Existen importantes recursos no desarrollados de PGE, particularmente en América del Norte (por ejemplo, el complejo Stillwater).
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