| The research work of this paper is based on the theory of tectonic geology,ore deposit,petrology and geochemistry.Based on the detailed geological survey of vanadium deposits in Caocheng-Tangzhai area of Anlu city,Hubei province,the geological engineering layout is obtained through field geological survey.Combined with the previous research data of black rock series vanadium deposits,the author basically determined the stratigraphic age,sequence,lithology,thickness,occurrence and distribution of the area,studied the sedimentary environment and lithofacies of ore-bearing strata,The distribution and variation of ore-forming elements in rock assemblage and ore-bearing strata are determined,and the occurrence horizon and spatial distribution of orebody are determined.,the characteristics of ore-bearing black rock series,the source of ore-forming material,the sedimentary principle of vanadium ore and the state of vanadium occurrence are summarized and analyzed,and the ore-controlling factors and metallogenic regularity of vanadium ore in the study area are basically found out.The vanadium ore occurs in the lower member of Yujiachong formation of the black rock series at the bottom of the Cambrian.The main lithology is the intercalation of carbonaceous thin layer siliceous rocks and variegated clay rocks in the lower member of Yujiachong formation(?1y1),and the bottom is composed of phosphorous(siliceous,fluorite)nodule clay rocks.The orebody is stratified,and stratiform distributes along the structure as a strip,which is strictly controlled by the structure.The ore structure is mainly cryptic or muddy.The ore structure mainly consists of leaf structure,block structure or strip structure.The main minerals are hydromica,vanadium mica,carbonaceous,calcite,quartz,pyrite,magnetite.The sedimentary environment of vanadium deposit is the anoxic reduction environment of basin model and transgression model,and the material source is continental clastic,hot water deposit and biological deposit,in which biota is the main material source of vanadium.From the rhythm of mineralized deposit,the rich ore is in the alternating stage of entering and retreating,and occurs in hydromica.On the basis of analyzing and summing up the indicators of vanadium ore prospecting in the study area,the potential evaluation of vanadium ore resources in the study area is carried out.The study shows that the resources reserves in the study area belong to medium low grade vanadium deposits. |
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