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INTERPRETATION OF LANDSAT MSS DATA IN AN IRON‐ORE‐BEARING ZONE IN GOA, INDIA*
- Source: Geophysical Prospecting, Volume 32, Issue 2, Mar 1984, p. 282 - 291
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- 27 Apr 2006
Abstract
In South and Central Goa iron ore occurs in two parallel belts with the general NW‐SE Dharawar trend. The ore occurrence, however, is not continuous. There are barren zones as well as zones of very high concentration in some of which there are mining activities.
Landsat MSS data have been interpreted over a zone covering both mineral belts in order to delineate the ore occurrences. As a guide line a known ore‐bearing area has been considered along with the unknown zones.
On the basis of two‐dimensional plotting of gray level values it has been found that the MSS bands 4 and 7 are most suitable for the studies over iron‐rich areas in Goa. Two techniques are described here for the processing of the MSS data; the separation of residual from the regional and MSS band‐ratioing. It is observed that (i) the gray level residual maps of MSS bands 4 and 7 are of use in demarcating the iron‐ore‐bearing zones, and (ii) an existing mine, an abandoned mine, and a proved iron ore zone could be delineated by MSS band‐ratioing. On the basis of the latter technique, a few areas with ore occurrence potential have been indicated.