Edad K/Ar de dos rocas básicas del flanco noroccidental de la Cordillera Central
Keywords:
Método K-Ar, Rocas ígneas, Petrología_Cordillera Central de Colombia, Rocas básicas (es)Downloads
Gracias a una financiación de Colciencias se pudieron datar por el método K/Ar dos muestras de rocas ígneas básicas del flanco occidental de la Cordillera Central en el Departamento de Antioquia. La comparación de las dos nuevas edades parece confirmar la hipótesis de la presencia de dos secuencias básicas de edades diferentes en la parte septentrional del occidente de Colombia.
Nota de los editores, (Diciembre, 1981): La edad de la pegmatita hornbléndica recalculada con base en las constantes aprobadas en 1976 por la subcomisión de Geocronología de la IUGS es de 166 m.a.
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