| This thesis focuses on researching and summarizing the geological setting, mining and deposit geological features of Jinshizhang by employing comprehensive geological analysis on the basis of other researcher's data. In addition, the thesis completes the metallogenic prediction through extracting the geophysical and geochemical information of Shanmenqian-baishuizhai combining with mineralization prediction theory.The field investigation and indoor analysis in Jinshizhang show that the Sinian Yunkai-group is related to the mineralizing, E-W trending is the main ore-controlling structure. The sinian volcanic activities provided some material source. Magmatic activities during the Yanshanian period were the most intensive which provides the thermodynamic and structural conditions for the mineralization, migration and enrichment. The type of deposit is volcanic deposition-magmatic hydrothermal liquid superimposed transformation. The ore-body main located in the fractured zone of Sinian Yunkai-Group which is composed of high-grade metamorphic rock with marble, andesitic lava and mixed rock. The content of Ag varys widely, the contents of Mn, Zn and Pb are also varied in some degree. The contents of Si, Ca, Al are high. The content of trace element Be is lower.By a 1:10000 measurement of soil geochemical profile in Shanmenqian-baishuizhai and the extraction of geochemical information, ten geochemical anomal areas were certified, among which the Ht5, Ht6, Ht7, Ht8 and Ht10 have important implications for the Ag-Pb-Zn polymetallic deposit. The cluster and factor analysis of geochemical data showed that Cu is most closely with the ore-forming elements Ag, Pb, Zn, followed by Au and Sn. The factor analysis extracted four main factors, which showed the multi-stage and multi-phase of the ore-forming processes and hydrothermal activity.The results of 1:10000 measurement of direct current and high-precision magnetic in Shanmenqian-baishuizhai show that the low resistivity and high polarization anomaly for number three, four, six in Shanmenqian were important for exploration of the Ag-Pb-Zn polymetallic deposit. However, there is not significant metallogenic abnormalities in Baishuizhai, the four high polarization anomalities zone are narrow and low amplitude, less than the known ore body anomaly.According to the geochemical and geophysical results of Shanmenqian-baishuizhai, combined with comprehensive analysis of geological features, there delineated three A-grade predicting areas, two B-grade predicting areas and one C-grade predicting area. |
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