| New Calama and Escondida Interpretation Available | |||
The Calama surveys were flown on N-S lines, with a nominal spacing of 500 m, at a constant nominal elevation of 100 m above the ground. The geophysical system incorporated a caesium vapour magnetometer, 256-channel gamma-ray spectrometer with a 33.6 l crystal pack and a differential GPS navigation system, mounted in a Piper Chieftain. The Escondida block was flown with a nominal spacing of 250 m and same terrain clearance and equipment. As part of the projects lithological and structural interpretation of the datasets was accomplished at 1:100,000 scale. However, due to the high quality of the datasets, much more detail can be extracted at 1:50,000 scale, or even 1:25,000 for the Escondida block. PGW is offering a detailed interpretation of the whole area at 1:50,000 scale. The region has been divided into 15’ x 15’ blocks according to the regular published cartography (figure 1). The integrated interpretation will include the new Neural Network tool developed by PGW for semi-automatic alteration and target mapping. This tool was developed by PGW as part of a project within the Earth Observation Application Development Program (EOADP) with the Canadian Space Agency (CSA), “Cost-effective geologic mapping and mineral deposits targeting algorithms”. The Neural Net tool has already been tested and applied on most of the Calama area with excellent results.
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