Study on Three-Dimensional Geological Modeling and Genesis of Getang Gold Deposit in Southwestern Guizhou
In order to intuitively show the spatial distribution law of Getang gold deposit and carry out comprehensive metallogenic analysis,based on the existing geological data such as boreholes and profiles,combined with the existing research results of ore-forming material sources,a three-dimensional geological model of Getang gold deposit was established using Petrel software.On this basis,the spatial distribution and enrichment characteristics of Getang gold deposit were discussed,the metallogenic process of the deposit was analyzed,and the metallogenic model of the deposit was summarized.The results show that Au is mainly enriched in the first member of Longtan Formation,and most of the ore bodies have low grade.The ore bodies with industrial grade are mostly concentrated near the fault;in general,the grade of ore bodies is negatively correlated with the volume of ore bodies,but the abnormal increase of volume occurs many times in high grade ore bodies.The distribution characteristics of the deposit along the strata are significant,which are obviously controlled by the unconformity surface or the interlayer slip surface,but the fault may provide an upward channel for the ore-bearing hydrothermal fluid.The formation of the deposit is closely related to magmatic activity;the hydrothermal fluid enters the ore-bearing layer along the fault and undergoes strong alteration,so that Au is precipitated and pre-enriched,and the gold deposit is formed under the action of groundwater in the later stage,which is the metallogenic model of volcanic sedimentation-hydrothermal transformation.The above research results have certain indication and reference significance for the genesis research and prospecting work of Carlin-type gold deposits in China.
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