TRACE ELEMENTS IN DEPOSITS OF JURASSIC PALEOVALLEYS OF THE CHULYM-YENISEI DEPRESSION (Malinovskoe uranium deposit)
A. A. Potseluev, L. P. Rikhvanov, S. I. Arbuzov, P. I. Lyapunov, I. M. Rubinov, M. I. Bazhenov, and L. I. Zadorin
Keywords: Trace elements, alluvial deposits, paleovalleys, placers, fractions, infiltration processes, sources of elements, predicted resources
Pages: 891-899
Abstract
The REE composition of uraniferous alluvial deposits in the Malinovka paleovalley of the Chulym-Yenisei depression is studied. The contents of elements are determined by the INAA and X-ray fluorescent methods and by emission and X-ray spectroscopies. The minerals are identified by X-ray, luminescent, and laser analyses. According to clarke of concentration, the elements follow the sequence: Se (3600), U (250), W (185), As (47), Mo (13), V (6.3), Hf (2.1), Ge (1.8), Y (1.3), Sc (1.2), Zr (1.2),  REE (0.9), and Th (0.4). Such elements as U, Mo, Se, V, Hf, W, As, and Y are characterized by an extremely uneven distribution in the deposits (V > 70%). The ore-bearing zone shows three types of elevated concentrations of elements: primary clastogene (W, Ge), primary sorption-biogenic (U, Se, Mo, V, As), and secondary redeposited infiltrogenic (elements of the first two types plus Hf, Sc, and REE). The high content of W is explained by its supply from primary deposits of the Altai-Sayan region, and the high content of Ge is due to the presence of fragments of Ge-bearing coals. |
