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handle: 10261/36207
[ES]: Se define por primera vez, la aparición de fases metálicas ligadas a procesos hidrotermales en La Gomera (Islas Canarias). Se estudian paragénesis de pirita-pirrotina y magnetita-ilmenita para la estimación de sus condiciones de cristalización en las intrusiones alcalinas de Tamargada. La primera asociación indica condiciones de estabilidad entre 650 y 700°C para cristales idiomorfos primarios, mientras que los tipos alotriomorfos se formaron a menos de 500°C, como consecuencia de un metamorfismo de tipo hidrotermal. La paragénesis magnetitailmenita señala un intervalo entre 700 y 790°C que corresponde a la temperatura de cristalización magmática.
[EN]: Ore phases linked to hydrothermal processes were detected in La Gomera (Islas Canarias). Pyrite-pyrrhotite and magnetite-ilmenite associations in Tamargada's alkaline rocks are studied and used as geothermometric indicators. The former pair suggests a stability about 650-700°C for primary and idiomorphic types, and less than 500°C for secundary allotriomorphic ones, formed by hydrothermal metamorphism. Magnetite-ilrnenite pairs, point out an interval about 700-790°C that would come up to the magmatic crystallization temperature.
6 páginas, 7 figuras, 1 tabla.
Peer reviewed
Minerales Fe y Ti, Tamargada, La Gomera, Alkaline rocks, Fe-Ti minerals, Canarias, Rocas alcalinas
Minerales Fe y Ti, Tamargada, La Gomera, Alkaline rocks, Fe-Ti minerals, Canarias, Rocas alcalinas
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