ABSTRACT
Tectonic and ore-forming process is product of crustal movement. The tectonic force may influence the conditions under which chemical reactions take place, bringing about the migration of chemical constituents, lead to stress corrosion, cause strain incompatibility between host rocks and country rocks. The kinetic energy caused by tectonic force can change into other kinds of energy, therefore may change the chemical potential in the ore-forming process. Mang cases indicate that structures of syn- and pre- mineralization may influence physical and chemical conditions of mineralization. In the area involved in the formation of tectonic system, the trend of material flowage and chemical reaction is from higher chemical potential to lower one. Ore-forming fluid move along structural planes or rock pores to deposit there. In the folds resulting from buckling and bending, the elements with bigger ionic radius and the more reactive elements with smaller ionic radius are migrated by their own means. Under the coaction of vertical buoyancy and lateral tensile force, the tectonic denudation occurres in the upper part of fold; At the same time, the deep materials uplift because of the chimney effect. The friction and the dislocation results in shear force, producing shearing crack system, while the tension crack appears in the uplifting mass. If ore-forming fluid appears, it will be deposited in the crack, forming vein deposits. In the compressive and compresso-shear faults, from their main fault plane to the both sides, the stability series of ore-forming elements is in accordance with the series of the elemints’ionic radius from small to big. Therefore, in these kinds of faults mentioned above, ore deposits of high sulfur and low oxygen are easily formed. In the tensil and tensil-shear faults, the more reactive oxyphile elements and high valence ion are enriched, and it is easy to form ore deposits prodominated by higher oxidation state minerals.
