Summary

Geochemical behaviour of Cu, U and Mo in the copper – uranium ore field in Kon Ra

Nguyễn Tiến Dũng, Nguyễn Văn Niệm, Trần Duân, Nguyễn Văn Hoàn, Đỗ Đức Nguyên, Nguyễn Đắc Sơn.

This study is based on a combination of the results of analyzing the ore forming elements by dethp and the other components. The geochemical behavior of the elements in the copper, uranium - molybdenium mineralization zones is explained for the first time: The different mineralization stages closely relates with surrounding rock - magma interaction environment to create transition elements complexes (Cu-Co-Ni, U-Mo-Ni, U-Co- Ni, U-Pb; U separates from Co, As; Cu tends to separate from U, As but not clear). These elements movement depends on the magma geochemical environment and the conditions of ore accumulation.

The medium-fine coarse granite which is little alterated, it is auxiliary mineral specialization of Cu, geochemical specialization of Mo; Cu's behavior is not clear and tends to be opposite to that of Mo and Ni; In these granite rocks when they are alterated and associated with copper mineralization, Cu tends to accompany Mo-Co-Ni complexes, especially Zn. And brighter granite rocks have a significant decrease in the degree of geochemical specialization of U, Mo.

The granite magma in Kon Ra area can be a source of copper-uranium-molybdenum ore generation, both as a source alterates surrounding rock to provide Cu-U-Mo re-deposition energy.

The above issues serve to determine the source of ore generation and aim to forecast deposite types in the next stage of mineral search.

Key words: Geochemical specialization, geochemical behavior, Cu, U and M, Kon Ra