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La formación de cadenas de plagioclase durante la transferencia convectiva en el magma basáltico
1Department of Geology and Geophysics, University of Connecticut, Storrs 06269, USA. philpotts@geol.uconn.edu
Nature
|July 14, 2000
Resumen
El flujo de lava de Holyoke es un flujo de lava.
Área de la Ciencia:
- Geología Geología Geología.
- Volcanología Volcanología.
- Petrología Petrología.
Sus antecedentes:
- Las rocas basálticas exhiben texturas únicas, como las redes de cristales de feldespato.
- El flujo de lava de Holyoke en Connecticut y Massachusetts muestra una notable red de cristales.
- Las interpretaciones anteriores sugirieron una temprana cristalización y compactación como el origen de esta textura.
Objetivo del estudio:
- Para investigar el origen de la red de cristales de feldespato en el flujo de lava de Holyoke.
- Para entender el papel de esta textura en la solidificación y diferenciación del magma.
Principales métodos:
- Análisis de la textura de la roca basáltica de la parte inferior del flujo de lava de Holyoke.
- Experimentos de calentamiento para determinar la persistencia de la red de cristal a altas temperaturas.
- Interpretación de la evidencia geológica de campo.
Principales resultados:
- La red de cristales de feldespato, que se encuentra en el flujo inferior, en realidad se forma en el frente de solidificación superior.
- Esta red se transporta hacia abajo dentro de penachos de hongo cristalino denso.
- Esto proporciona evidencia de campo para la convección en los flujos de lava.
Conclusiones:
- La textura observada en el flujo de lava de Holyoke inferior se originó en el frente de solidificación superior.
- La convección juega un papel importante en la solidificación y diferenciación de los flujos de lava.
- Este estudio ofrece evidencia de campo crucial para los procesos de convección de magma.
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