Anomaly map ofZ component of the Indian sub-continent from magnetic satellite data |
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Authors: | M G Arur P S Bains Jeevan Lal |
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Institution: | 1. Survey of India Geodepic and Research Branch, 248 001, Dehra Dun, India
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Abstract: | An anomaly map of the Z component has been produced for the region of the Indian sub-continent for the first time by the Survey of India usingmagsat data. Data of thousands of kilometres of satellite tracks of varying altitude have been reduced to a common elevation of 400 km by removing the external field and linear trend. The entire data was plotted on a map of 1:6 M and mean values of 2°×2° blocks then accepted for contouring. A prominent magnetic low is reflected over the Himalayas and a prominent high over the Indian peninsula. The dividing line of positive and negative anomalies between the Himalayas and Deccan Traps falls along the Narmada lineament. |
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