ROLE OF INTERACTION BETWEEN MECHANISMS OF PLUME- AND PLATE-TECTONICS DURING FORMATION OF THE UPPER PRIAMURYE (THE AMUR RIVER, RUSSIA) GOLD-SILVER MINERALIZATION IN THE LATE MESOZOIC

I. M. Derbeko, D. L. Vyunov, N. S. Bortnikov

Amure region is one of the leading regions of Russia in gold mining. Analysis of the distribution of geochemical fields of gold and silver ore mineralization clearly indicates an increased concentration of these elements within the areas of interference of differentiated Late Mesozoic bimodal complexes. According to geochronological data, the golden mineralization is associated with rocks suprasubduction magmatism (122- 140 Ma) [1; 3], and the later introduction of the bimodal complex in the collision situation when exposed to plume source (97-119 Ma), contributed to a redistribution of the metal and its high concentration in the rocks.

Key words: gold-silver mineralization, subduction, plume, Amur region.

Download PDF