ON THE POLYGENETIC NATURE OF THE CORRELATION BETWEEN ORE-FORMATION AND MAGMATISM

The correlations between ore-formation and magmatism have been conside red. A series of processes have been found to accumulate the ore compo nents scattered in source rocks into ore bodies and deposits under the magmatic influence. The ore-forming processes and its conditions were subdivided onto the ones in magmas and magma sources (the system melt - crystal, melt - melt, and melt (+/- crystal) - fluid), and ones in surrounding rocks under the mechanical and chemical influence, heat tr eatment. In the first case the ore formation is directly, and in the s econd case - indirectly connected with magmatism. Analysis of differen t endogenic processes in the mantle and crust magma sources shows that theirs ore-forming activity is limited. Contrary, crystallization dif ferentiation and magma layering when salt melts are present play more important role in ore formation. The magmatic fluids acts as an ore-fo rming agents promoting more complete magmatic differentiation up to fo rmation of magmatic deposits, these fluids form and mobilize breaks sy stems and pores to move ore-forming fluids, redeposit ore minerals, he at the upper rocks. The absence of a single universal ore-forming proc ess in the nature means that only a cooperative effect of many process es and conditions leads to the formation of ore deposits. That is why the concentration considered in the paper is called polygenetic. Such an approach defined the limits of applicatiion of another (often ortho dox) conceptions of the correlation between ore-formation and magmatis m which exaggerate ore-forming role of separate processes or geologic factors.