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Results of airborne magnetometer profile from offshore Mangalore to offshore Madras (India) along the 13th degree parallel

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Summary

A study is made of an airborne magnetometer profile from 130 km offshore Mangalore to 60 km offshore Madras approximately along the 13th degree parallel obtained in May 1967 by the National Geophysical Research Institute. The total length of the profile is about 770 km. A Bouguer gravity anomaly profile along same traverse over the land section has been also studied along with the magnetic profile.

Eight major anomalies on the magnetic profile were chosen for depth calculations. Depths of the magnetic bodies were determined by elementary approximation method ofSmellie. It is found that in most of the cases the sources of the magnetic anomalies lie between 5 to 20 km (approximately). Only one anomaly yielded a depth of 2.7 km for its source. These anomalies are accounted for in terms of possible basic intrusions, faults, zones of weakness and ridge-like structures in deeper Crustal levels.

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Authors and Affiliations

  1. National Geophysical Research Institute, Hyderabad-7, India

    D. Atchuta Rao

Authors
  1. Hari Narain
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  2. P. V. Sanker Narayan
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  3. D. C. Mishra
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  4. D. Atchuta Rao
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Additional information

N.G.R.I. Contribution Number 131.

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Narain, H., Narayan, P.V.S., Mishra, D.C. et al. Results of airborne magnetometer profile from offshore Mangalore to offshore Madras (India) along the 13th degree parallel. PAGEOPH 75, 133–139 (1969). https://doi.org/10.1007/BF00875050

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  • DOI: https://doi.org/10.1007/BF00875050

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