The Pyrite Genetic Mineralogy And Prospecting Of The Shengou Gold Mine In Qianhe, Henan

The Qianhe gold deposit locate south-north China block. Take Machaoying fault zone as demarcation line. The North is Huaxiong platform. The South is Luonan-Luanchuan platform edge. The two crust has obvious double layer structure and some similar characteristics of strata, structure and magma activity. There are about forty known Au and polymetallic deposit this area, in which the Qianhe gold mine has the most size.At the guide of genetic mineralogy and prospecting mineralogy, we widely collect the predecessor material and study the Qianhe gold deposit with pyrite genetic mineralogy. The main research scope includes 75-91 exploration line , 200m-520m, altogether 9 midcourse. The research content mainly is the characteristic of the pyrite morphological typomorphic characteristic, pyroelectricity and bursting temperature., and their relates with metallogency. The research approach is field observation closely combines with lab research, Macroscopic with microscopic, typical deposits with Qian- he gold ore. We will give the deep prediction to The Qianhe gold ore on the basis of genetic mineralogy. Main work achievement including:1 From Shengou ore block and IV ore band 33 sample 1860 grains pyrite morphological features statistical data ,we may know that the pyrite morphological features occurred in The Qianhe gold ore are simple. The main includes: {100}. {111} {210}and {211} {210} crystal habit and irregular have the same change direction with the gold mineralized strength. There is negative correlation between {100} crystal habit and the gold mineralization strength. Comparing the characteristic of pyrite morphological features with Au grade, we may know that the 79 to 81 explorations line less than 200m, which would have high Au grade.2 37 samples ,which from 75-91 exploration line , 200m - 520m,have thermoelectricity test. The conclusions indicate that pyrite thermoelectricity changes with altitude. We may know that the 81 to 84 explorations line less than 200m, which would have high Au grade. There probably is the head of the ore-body.3 16 pieces of pyrite from three metallogenic stage is analyzed by pyroelectricity. The result show the curve peak has three shapes, which is I type curve-the host peak temperature in the 250℃-300℃, II type curve-initial decrepitation temperature more than 300℃, III type curve-initial decrepitation temperature lower than 300℃. The contrast between the characteristics of curve shape and gold grade indicate, the II type curve corresponding the high gold grade and I III type curve corresponding the edge of ore body. Based on the above result, the higher temperature area will reappear in the 78 to 84 explorations line under 200m, which indicate the major ore-forming stage fluid can has activity at this depth.