MARINE MAGNETIC STUDIES OVER THE LACCADIVE RIDGE, INDIAN-OCEAN

Laccadive ridge is a prominent feature in Indian Ocean, off west coast of India. Marine magnetic survey carried out across the ridge between 8 degrees and 12 degrees N reveals that the ridge is associated with strong magnetic anomalies of the order of 200 to 400 nT. A significant low magnetic trend is present over the topographic high of the ridge. The results of spectral analysis and two-dimensional modelling of the data suggest the possible presence of an anomalous basic body, with v arying thickness. The inclination and declination obtained indicate th at the basic body may be derived from same volcanic activity as of the onshore traps associated with normal remanent magnetism.