Abstract
The Late Cretaceous Goias Alkaline Province (GAP) is located along a 250 x 70 Km, NW-trending region, and consists of mafic ultramafic alkaline plutonic complexes in the north, sub-volcanic bodies in the central portion and kamafugitic lava flows in the south. This provice contains some of the largest known kamafugite exposures, including the Santo Antonio da Barra flows. The lava volume in these flows reaches at least 23 Km 3 , spread over an area of 371 Km 2 , and are the world’s largest known kamafugite lava accumulation. The calculated lava volume is consistent with magma chambers equivalent in size to the plutonic complexes in the north of the Province, or with the kamafugite-carbonatite intrusion in the nearby Alto Paranaiba Igneous Province (APIP).
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