Some Aspects of the Geology and Geochemistry of Vengad Conglomerate, Cannanore District, North Kerala

Abstract

A conglomerate horizon separates the Early Precambrian high-grade supracrustals from the low-grade supracrustal rocks in north Kerala. The conglomerate consists dominantly of quartzite pebbles. In addition quartz. granite and quartz-mica schist pebbles are also recognised. Tbe matrix is of arkosic composition. The petrochemistry of pebbles and matrix indicate a dominant sialic provenance. The presence of quartzite pebbles suggests a cycle of sedimentation prior to the deposition of Vengad conglomerates.