Análisis petrogenético de las denominadas “Anortositas” aflorantes en la vertiente occidental de La Sierra Nevada de Santa Marta – sector Río Sevilla – El Palmor – (Colombia)
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Las “Anortositas del Río Sevilla – El Palmor” Geoquímicamente poseen carácter subalcalino con tendencia calcoalcalina, clasificadas como gabros y gabrodioritas. El comportamiento geoquímico de los elementos mayores, elementos traza y REE permitió dividirlas en: 1) anortositas y neises anortosíticos (relacionados genéticamente) y 2) neises cuarzo micáceos y anfibolitas (con características muy similares a las de las rocas de la corteza inferior). Se determina que las anortositas del Rio Sevilla- el Palmor corresponden a anortositas de tipo masivo , de magmas generados por fusión parcial del manto, que ascendieron en forma de diapiros y fueron emplazadas por inyección en las rocas de la corteza representadas aquí por los neises cuarzo micáceos y anfibolitas.
Abstract. Abstract. The "Anorthosites of the River Sevilla – El Palmor" Geochemically have subalkaline character with calc-alkaline trend, classified as gabbros and gabrodioritas. Geochemical behavior of major elements, trace elements and REE allowed to divide them into: 1) anortosíticos gneisses and anorthosites (genetically related) and 2) quartz mica gneisses and amphibolites (very similar to the rocks of the lower crust characteristics). It is determined that the anorthosites of Rio Sevilla-the Palmor correspond to anorthosites mass type of magmas generated by partial melting of the mantle, which rose as diapirs and were emplaced by injection into the crustal rocks represented here by gneisses quartz mica and amphibole.
Abstract. Abstract. The "Anorthosites of the River Sevilla – El Palmor" Geochemically have subalkaline character with calc-alkaline trend, classified as gabbros and gabrodioritas. Geochemical behavior of major elements, trace elements and REE allowed to divide them into: 1) anortosíticos gneisses and anorthosites (genetically related) and 2) quartz mica gneisses and amphibolites (very similar to the rocks of the lower crust characteristics). It is determined that the anorthosites of Rio Sevilla-the Palmor correspond to anorthosites mass type of magmas generated by partial melting of the mantle, which rose as diapirs and were emplaced by injection into the crustal rocks represented here by gneisses quartz mica and amphibole.