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Geology
The most important result of the geological phase of the study was the
discovery of an area of hydrothermal alteration located some 25 kms. to
the northeast of the El Teniente Copper mine. The area has been examined
on a number of occasions using panchromatic photography yet there is no
evidence that this discovery was made previously. This anomaly is
characterized by a small stock of intrusives which present similar
chacacteristics to existing copper deposits (3).
The first indication of this phenomenon was found on color 1:50.000 scale
color photography which was later confirmed on the color infrared and
then again in the field.
In the costal areas using color infrared photography it was possible to
clearly identify two types of sand of distinct mineral composition (4).
This was not identified in the color photo.
Continental fresh water losses were identified with thermal imagery first
and confirmed with color photography later. These losses are very important
for ground water prospection.
Pollution
It was surprising to see the pollution produced to the ocean by the Maipo
River and its influence to the San Antonio Bay (4).
The color photography clearly identifies the problem and predicts a future
upraising of the bay bottom, making difficult the navigation of large ships.
The color - IR photography clearly oblianiates the boundaries of different
suspended sediments concentration(5).
Agriculture (6)
Besides the traditional results obtained with this kind of imagery, the
use of color IR photography at 1:20.000 and 1:10.000 scales, as a mean of
detecting loss of strength was determined for vineyards, apricot trees
and small plants. This identification is possible before it could even be
visually seen.
Marine Studies
From the imageryenalysis it was concluded that color photography is the best
for bathymetry and coast line determination, even on beaches (75. Chile
exports some US$ 7.000.000 of sea weed per year and is very interested on its
prospection and preservation (8).
Surface sea weed beds were clearly identified and classified according to its
species with color IR photography, covering large areas in short time. Lower
sea weeds are better seen with normal color photography (7). Periodical
color IR and normal color flights could monitor the sea weed resources.
All results of this multidisciplinary project were presented at the First
International Symposium on Remote Sensing, held in Santiago from 6 to 12
June of this year. Only the most significant results of this project have
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