Heavy Mineral Studies of Beach Sands of Vagathor, North Goa, India
Journal Title: International Journal of Modern Engineering Research (IJMER) - Year 2014, Vol 4, Issue 8
Abstract
Vagator beach is situated 22 km away from panjim on the northern side Bardez taluk approachable via Candolim are Mapusa by road. The beach is projected on both the sides by promontories. The beach is in arcuate shape, the area included with survey of India toposheet No 48/E/14 which is bounded by latitudes 15º35ˈN 15º38ˈN and longitude 78º43ˈE. The Chapora river and its tributaries drain the entire region that is the Vagator beach. It flows from North-East to South-West direction. The drainage pattern is structurally controlled; the Chapora River has its source in the Ramghat hills of Belgaum district in Karnataka then it flows through the Thilari ghat and enters Goa. Its length in Goa is about 31 km and the mouth of the river bank, mud bank and mangroves swamps are common. In laboratory techniques heavy mineral separation are based mass separation in a liquid with specific gravity and magnetic separation using hand magnet and Frantz isodynamic separator at different volts. X-ray analysis was carried out by using RIGAKU ALTIMA IV copper target on the basis of Bragg’s law. The non magnetic sand grains was observed under optical microscope to identify diagnostic properties of minerals. The heavy mineral shoot comprises of opaque (magnetite and illmenite) and transparent heavy minerals like hornblende, epidote, garnet, rutile, zircon, enstatite and minor amounts of tourmaline. The light minerals are mainly quartz and feldspars. The magnetite concentration ranges between 2.01 to 56.86% and Ilmenite between 2.83 to 41.04% and non mangnetics between 1.18 to 44.81%. X ray diffraction studies and SEM (Scanning electron microscope) studies were employed to study the mineralogical composition of beach sands of Vagator and detailed investigations are dealt in the paper.
Authors and Affiliations
A. Sreenivasa , H. M. Jayasheela , P. Bejugam , A. R. Gujar
Keywords
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