Pangasinan province survey for heavy minerals

Sediment and panned heavy mineral survey were conducted in the province of Pangasinan in Luzon Island for a cumulative period of 1 1/2 months in 1983. A total of 40 stream sediments and 125 panned heavy mineral concentrates were obtained along active rivers and streams draining into the Lingayen Gulf and Luzon Sea. The minus 80 mesh sediment fractions and non-magnetic portions of the heavy minerals were analyzed for total uranium using delayed neutron activation analysis techniques. Results indicated that uranium values ranged from 0.1 ppm to 1.4 ppm and 0.1 ppm to 23.2 ppm for the stream sediments and heavy minerals respectively. The uranium values obtained in the stream sediments were considered to be within the range of the average uranium concentrations in northwestern Luzon. However, uranium values in the heavy minerals, in general, were higher than the values obtained in northwestern Luzon. One uranium anomally area was found in San Carlos. (author)