チリ共和国・アンデス・カッパーベルトにおけるI.P.調査

抄録

Successful results have been obtained by the present I.P. prospecting at all the observed area in Andes Copper Belt, Chile, because the writers could overcome the problems of the electrical earth resistance about which they had worried at the beginning.
Several frequency effect anomalies were found in these areas. Among them, the most promising anomaly was recognized at B-65 area, judging from the scale, shape and distribution of resistivity, and the anomaly of metal conduction factor.
The intensity of anomaly in B-66-S area was slightly smaller than that of B-65 area. Namely, in this area, the relations between the F.E. anomalies and the distribution of resistivity are not so clear as in the former area, although there are several F.E. anomalies as mentioned above.
Compared with the former two areas, the anomalies in C-134 area were not remarkable considering from the shape and extentions. These anomalies can be presumably due to mineralization near surface.
Summarizing the above, the results will be given as follows :
(1) In the case of B-65 area, two F.E. anomalies are found. Both of them seem to have closer relations each other. The most promising anomalies may be in the areas from the traverse N3 to the traverse 0 around the station 0.
(2) In the case of B-66-S area, F.E. anomalies are found in the areas from the traverse N8 to the traverse 0 around the station W6. The most remarkable one is recognized in the traverse N2.
(3) Finally, in the case of C-134 area, some smaller anomalies are found at the station S2 in the traverse W6 and the station S5 in the traverse 0, respectively. However, these anomalies may be not so important judging from the scale.