| Located in the northeastern part of the Greater Xing'an Mountains,Zhengguang Gold Mine is an important gold deposit in the Duobaoshan ore district and has been developed.The gold deposit of the deposit has reached more than 35 tons,and the average grade is 3.49 g/ton.It reaches the scale of large gold deposits.The deposits can be divided into three ores,I,II and III.The No.II belt is located in the middle of the deposit.It is the largest mining belt in the mining area.The research of Zhengguang Gold Mine has focused on the characteristics of deposits and the types of deposits.The ore bodies of this deposit are not easily distinguishable by the naked eye.In the past,the ore bodies were generally determined by sample analysis and testing,and the efficiency was low.The PIMA test has the advantages of fast and low cost.This paper systematically studies from the perspective of altered minerals,with the aim of establishing a simple mineralogical identification mark,which provides a reference for the research and development of mineral deposits.Based on the data collection,this paper selects the No.II ore belt based on the work of the predecessors,and mainly uses PIMA technology to analyze the alteration characteristics of the deposit by means of rock ore identification,SEM analysis,XRD analysis and cluster analysis.Conduct research to gain the following recognition:(1)The main alteration minerals identified in the PIMA test are: sericite,chlorite,epidote,montmorillonite,kaolinite,etc.(2)The main metal minerals identified in this paper are pyrite,hematite,limonite,non-metallic minerals such as muscovite,kaolinite,etc.The gold and silver minerals are mainly silver and gold,natural gold and Hui.Silver ore,this new discovery of mineral selenium-silver ore,iodide-silver ore,which is distributed in quartz and pyrite.(3)The gold content in the AA',CC',and DD' sections studied in this paper is less than 0.1-52.38 g/t,and a total of 133 ore samples are tested.Among them,there are 8 samples reaching the cut-off grade,mainly containing yellow iron shale In the belt.(4)The main altered mineral species identified in this paper are verified by microscopic rock ore identification,scanning electron microscopy and XRD phase analysis.According to the spatial distribution characteristics of altered minerals,the altered mineral types are determined and the alteration zone is divided.The alteration center is the Huangtieyingying lithification zone;the periphery is the Qinglan lithology zone.(5)PIMA test analysis,laboratory analysis and field observations show that the gold ore in the mining area is mainly in the Yellow Iron Ore Formation,so the Yellow Iron Ore Formation is a prospecting mark,and the corresponding oxidized mineralogical prospecting mark is limonite.Hematite.In view of the fact that PIMA technology is a simple means of identifying mineral alteration zones,it is recommended to use PIMA technology as the main method to identify the alteration zone by alteration minerals and then to determine the mineralization zone. |
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