Petrographic characteristics of wall rock alteration and genesis of ore deposit of Shanshuwu fluorite deposit in Pucheng
The wall rock alteration of Shanshuwu fluorite ore shows the combination of kaolinitization,kaolinite sericitization and silicification under microscope.The wall rock alteration can be confirmed from the original rock belt-structural fracture belt,to kaolinitization belt-silicate sericite belt,to silicate belt,to tectonic fracture belt,to original rock zone on the other side by the investigation of the wall rock alteration of the field outcrops.It shows that in the process of ore body formation,medium-fine-grained biotite monzogranite and granitic porphyry in the original rock formed the fragmented biotite monzogranite and fragmented granite porphyry under a series of tectonic movements;With the further intensification of tensile fracture activity,the rock was broken into the granite fragmented breccia;The hydrothermal solution moves along the structural fissure,forming kaolinite fragmented breccia,kaolinite sericite fragmented breccia and fluorite silicified rock by bringing in and out the components.The fluorite ore is formed by the dynamic crushing generated by the tectonic movement and with superimposed low-temperature hydrothermal erosion,it belongs to the low temperature hydrothermal filling fluorite deposit,the silicified rock superimposed strong kaolinitization and sericite is the most obvious prospecting marker.
Fluorite depositWall rock alterationPetrographGenesis of ore deposit
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