Study of monazite and zircon in Cerucuk Belitung

Geologically the study area lies in the distribution of granite in a single line Malaysian tin, Bangka Belitung, Karimata containing mineral monazite. Monazite is one of the radioactive minerals containing U, Th, REE in phosphate bonds. The results PPGN-BATAN (1981/1982) shows that the sample containing monazite sand concentrate reached 2.72 % (heavy minerals) with a radioactivity of 3000 c/s. Petrographic analysis of granitic rocks contain minerals monazite 1-2 % by radioactivity 200-400 c/s. Based on these considerations, it is necessary to further research in the development and assessment of prospects for mineral monazite. Activities to support PPGN-BATAN in quality improvement programs and quantity of radioactive mineral reserves in Indonesia. Objectives to be achieved is to localize the prospect area distribution of monazite contains uranium, thorium, and rare earth elements; and zircon in the area of 100 km². The results of field studies showed that the presence of monazite contained in the sand, clay as alluvial deposits derived granitic rocks. Indications are reflected in the results of radioactivity measurements of soil/alluvial ranged between 50-375 c/s, measurement of radioactivity of heavy minerals (MB) ranged between 50-150 c/s. The containing of Th: 100 - 6.545 ppm and U: 15-639,4 ppm. The area of potential radioactive minerals is 31,680,000 m². (author)