The Ore-controlling Geological Conditions of V Ore Deposit in the Xianghe Area of Shangnan County

　　The Ore-controlling Geological Conditions of V Ore Deposit in the Xianghe Area of Shangnan County
　　In recent years, with the strong growth of the national economy and the advancement of technology, vanadium and its compounds are widely used in iron and steel, chemical engineering, superconductors, special alloys and technology production.The market demand of vanadium grows year after year. As the international iron ore price increases, the alloy steel output in China will substantially increase the proportion ,and the demand for vanadium resources will continue to expand.Vanadium mineral resources has increasingly aroused people’s attention, with very good development prospects. Therefore, it is especially essential to research the geological condition, genetic type and ore-control factors of vanadium deposits, in the black rocks at the bottom of Cambrian Segment neodymium magnets system.Through the geology survey in the open air, the sampling, the lead-zinc deposit geological data collection, reorganization, as well as to study trace elements, rare earth elements of the sample, the paper has initially discussed the vanadium deposit geological feature, the ore deposit geochemistry characteristic, as well as the ore-control factor, and has yielded below the main results and conclusions:1、The vanadium deposit in the black rocks at the bottom of Cambrian system, is controled by the formation, lithology, organic matter, the ancient structure and ancient geography.The mineralization has organic matter (biochemistry) participation. Carbonaceous shale is a sedimentary rock with biological activities, cherts is a typical hot water sedimentary rocks. V, Ti, Ba, Si and other elements came from the submarine hydrothermal activity.Deposits with double feature of microbial mineralization and deposition of hot water in the seabed, belong to biogeochemical sedimentary deposit areas.
　　2、The vanadium deposit in Xiang River region is located the south of Qinling Hercynian - the eastern section of Indo-Chinese fold belt in the Qinling fold system, south of Danjiang fracture, Wudang dome (block) north margin, the two wings of Lengshuihe - Bai Lang town syncline. Ore-bearing rocks for cherts + clastic rocks with a small amount of carbonate rocks in the construction of the black rocks , react that the ore-bearing rocks format at the sedimentary environment with the lack of land-based sources of rough debris , non-compensatory-rich microbial, delay flow http://www.999magnet.com characteristics.3、The main rock types of deposits in the black rocks of the main ore-bearing construction are carbonaceous shale and silica rock. mineral composition are mainly quartz, feldspar, clay (illite or sericite) and pyrite, barite, and so on.The rocks are rich in organic carbon. In the compage, the two types of rock show bands or inter-layered, and phosphorus nodule often appear.But vanadium host in mudstone. The vanadium grade in the phosphorus nodule is also low. This indicates that the deposit may contain two different sedimentary environment and often turn.4、REE study shows that the REE chondrite standardized model of the construction of the ore-bearing siliceous rocks shows only limited Ce is negative anomaly and the Eu is obviously negative anomaly, and ore-bearing shale in the construction of REE chondrite standardized model shows a middle Ce negative anomaly , a very obvious Eu anomaly, and the right dip graph, that shows rock format in the most high-temperature deoxidization environment. The REE chondrite standardized model of the ore-bearing host rock show a middle Ce negative anomaly , obviously Eu positive anomaly and the right dip graphics, which are similar to some hot water sediments model. All the three samples in the ore-bearing construction react the feature of submarine hydrothermal fluids.