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Separation of Uranium and Thorium for 230Th-U Dating of Submarine Hydrothermal Sulfides
Published on: May 20, 2019
Los depósitos de sulfuro del este del Pacífico aumentan cerca de 21 grados
Science (New York, N.Y.)
|March 28, 1980
Resumen
Se descubrieron depósitos masivos de sulfuro en la elevación del Pacífico Este. Estos materiales polimetales y ricos en hierro forman estructuras únicas, ofreciendo información sobre los procesos geológicos.
Área de la Ciencia:
- Geología marina Geología marina.
- La geoquímica es la geoquímica.
- La mineralogía es la Mineralogía.
Sus antecedentes:
- Los depósitos masivos de sulfuro son formaciones geológicas significativas que se encuentran en varios entornos marinos.
- Los límites de las placas de acreción, como el East Pacific Rise, son puntos calientes conocidos para la actividad hidrotermal y la deposición de minerales asociados.
Objetivo del estudio:
- Informar sobre el descubrimiento y caracterizar la naturaleza mineralógica y geoquímica de depósitos masivos de sulfuro.
- Investigar el contexto geológico y los mecanismos de formación potenciales de estos depósitos en la elevación del Pacífico Oriental.
Principales métodos:
- Descubrimiento usando el platillo de buceo Cyana.
- Análisis mineralógico de sulfuro y materiales de óxido/hidróxido.
- Análisis geoquímico para determinar la composición elemental.
Principales resultados:
- Se identificaron depósitos de sulfuro masivo cónicos y tubulares en un sótano basáltico.
- Se encontraron dos tipos principales de material: rico en sulfuro polimétrico y rico en óxido/hidróxido de hierro (gossan).
- Las fases de silicato que incluyen sílice opalina y arcillas estuvieron presentes en ambos tipos de depósitos.
Conclusiones:
- Los depósitos descubiertos representan importantes acumulaciones polimetales y ricas en hierro.
- Los hallazgos contribuyen a la comprensión de los procesos hidrotermales en los límites de las placas de acreción.
- Se necesita más investigación para dilucidar completamente los mecanismos de formación de estos depósitos de elevación del Pacífico Oriental.
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