Study On The Geological And Geochemical Characteristics And Ore Prospecting Methods Of The Shangkengguo Pb-Zn Deposit, In The Northern Part Of Daxinganling Metallogenic Belt

Daxinanling mineralization belt is one of the most important non-ferrous mineralizationbelts in China, which has huge resource potential. This article have a data processing for1:200000regional geochemical exploration data, according to the regional geochemicalcharacteristics of the main elements,The border and extended position of Derganbu、Yiershi-Elunchun、Chaganaobao-Wuchagou-Duobaoshan three main NE trending fracture zoneand it’s the first time to propose that Wunugetushan–Duobaoshan area exists the EW trendingbasement fault; The research summarizes the temporal and spatial distribution regularities of theregional metal ores, first divides Daxinanling northern section into three three-grademineralization subzone and points out that mineralization of Daxinanling western slope is unique,which is an important lead-zinc-silver deposit、molybdenum deposit and uranium depositresource potential area.Systematically expounded the concept of mineral right target screening, basis, methods andprocedures,and explored the forest swamp landscape area "free web soil survey" and"high-density geochemical exploration" approach. Established the exploration geochemistryinterpret charts model system and combination of metal ore exploration methods fromreconnaissance to general prospecting and general exploration. Successively in23explorationrights of the northern part of the Daxinanling have found6large-medium-sizeddeposits,including the Shangkengguo Pb-Zn deposit.The success rate of finding economicdeposits in black areas has exceeded26%,confirmed the validity of selecting area and theexploration methods. By the end of2013, the Pb+Zn metal resource at all levels in theShangkengguo mining area has exceeded1.5million tons.This paper also summarized the geochemical characteristics of Shangkengguo Pb-Zndeposits, pointed that the characteristic of element content and variations, elemental composition,concentration zonation and abnormal area is important symbol to distinguish degree of thedeposit denudation, and the negative Ba anomaly values are important to determine thegeochemical indicators of the crater. In Single geological conditions, the "bimodal" typedistribution in Pb-Zn frequency distribution histogram and the significant differences inanomalies morphology of low-temperature and medium-high temperature elements aredistinguishing indicator of two superimposed mineralization. Meanwhile,Established thePb-Cd-Ag-Zn-As-Bi-Cu-Co-Mo vertical zonation total sequence of deposit primary halo,andillustrated that the superimposed halo of multiple ore bodies is caused by the reasons for thereverse zonation. Factor analysis revealed that the closed relationship between Ag and multiple elements is essential reason for Ag dispersed distribution in this mineral area.This paper also summarized that the major geological control elements controlled bonanza,are those radioactive fracture closed contact with crater.The indicator for prospecting is thecombination of kaolinised+chlorite alteration+veined strong silicification alteration. Researchsuggests that the ore-forming material source dominated by mantle;the metallogenic epoch isearly Cretaceous;and the genesis of mineral deposit is continental volcanic hydrothermal type.Established the metallogenic and prospecting model. Proposed the technical methods ofcomposite indicator to Pb+Zn orebody will increased by5%or more to the economic value ofestimated industrial ore resource.