Analysis of the achievements in tectonic dynamopetrologenic and dynamo-metallogenic simulating experiments and their geological significance

Abstract

Under the action of tectonic stress ore fluids carrying ore-forming materials can migrate from a higher stress district to a lower one. This is a fact which has been widely accepted by geological circles. However, can the components migrate in solid rocks under the action of stress? This problem has long attracted the attention of many geologists. The author has made a series of simulating experiments on non-mineralized rocks without H₂O in a high temperature-high pressure triaxiality experimental system. The results show that mylonite was produced as a consequence of shear flowage deformation in dolomite. The contents of the elements in porphyryclast and flowage deformation matrix were analyzed by means of electron microprobe, and the results show that Pb and Zn are obviously concentrated in the shear-flowage deformation zone. Furthermore, Pb is concentrated in its centre while Zn is concentrated on its margins. Newly-formed micro-grained galena can be detected locally.