Geologi dan Keterdapatan Uranium di Sektor Paluq, Mahakam Hulu, Kalimantan Timur

Systematic prospecting stage was conducted with area
covered Paluq Sector (0.8 km2). The aim of activities are to get geological setting, mineralization
and potency of uranium in Nyaan and Paluq Sector. The activities in this stage involved topographic
measurement, soil radioactivity measurement, stratigraphic and rincied geological structure
observation, making of peels at anomaly area and radioactivity anomaly area. At Paluq Sector there
are 5 (five) significant radiometric anomaly locations which are Putra River, Roos, Upper Paluq,
Mahakam and Siweg with radiometric value 500 – 10.000 c/s, with a background value of 100 c/s
furthermore making peels, tranche and test pit were conducted by sampling mineralization using
systematic channel sampling method. The petrography and mineralogy analysis exhibited that
mineralization of pitcblenda, monazite, autunite were associated with bornite, chalcosite,
chalcopyrite, lolingite, pyrite, sfalerite, ilmenite, limonite, magnetite, markasite, rutile, malnicovite,
hematite and iron oxide. Result of geochemical analysis for total uranium content in the rocks
ranged between 35 to 4.600 ppm of uranium.