Geological Feature And Prospecting Indicators Of Dagangoukou Vanadium-molybdenum Deposit In The East Of Kunlun Mountain Region,qinghai Province

The Dagangoukou vanadium-molybdenum deposit is located in the south margin of qaidam basin,qinghai province,the south slope of kunlun mountain in the middle section of east kunlun.The east kunlun pleated orogenic belt is an important geological unit in the north of qinghai-tibet plateau,The Dagangoukou area is located on the xueshanfeng-buerhanbuda orogenic belt,Under the dominant background of the orogenic period,Inclusive of the pre-orogenic period paleo-continental block controlled by the fault,It is mainly composed of Naij Tal Group,Wanbaogou Group and magnesia-ultramafic rocks widely produced along the Kunzhong Deep Fault,This belt is an important polymetallic metallogenic belt in Qinghai Province.Due to the harsh natural geographical conditions in the Daganoukou area,the resource potential survey has been slow and has not made a big breakthrough.After nearly four years of field geological survey,the author discovered the first black rock series vanadium-molybdenum deposit in the area and even in the province.The Dagangou area of the East Kunlun exposure the Ordovician-Silurian Halabayigou Formation stratigraphy,Most of the lithology is black shale series which are rich in a variety of non-ferrous metals,precious metals,rare metals and rare earth elements,Especially the enrichment of the vanadium and the molybdenum are most obvious.The main type of the mineral is carbon slate,which mainly composed of carbonaceous slate,coupled with carbonaceous siliceous rock microstrip.Ore minerals are mainly non-metallic minerals with less metal minerals.Metal minerals mainly include limonite,pyrite,chalcopyrite,copper blue,Non-metallic minerals are mainly quartz and carbonaceous powders,followed by calcite and so on.The ore mineral texture is mainly cryptocrystalline-microcrystalline structure,scale-like crystal structure,followed by granular,gelatinous,pseudomorphic structure;The ore structure mainly has microscopic parallel-grain-like layer,inter-layered layer and plate-like structure.The East Kunlun area experienced a complete process from the block to the closure of the land mass at Early Paleozoic,The East Kunlun area experienced the process of subduction and erosion of the Dongkunzhongyang to the western plate in the Ordovician-Silurian.Plankton in the oxygen-rich layer of the seabed multiplies and enriches the vanadium and other elements,With the action of the ocean currents,these organisms are brought to the oxygen-poor layer of the semi-deep sea environment.Algae plankton dies and gradually precipitates at this site.At the same time,the submarine hot water activity also brings a lot of other metallogenic elements.In the diagenetic stage,the argillaceous clay minerals further adsorb and enrich the elements.In the later Kunlun orogenic tectonic movement,different degrees of regional metamorphism occurred.The ore-forming elements may further enrich the late tectonic magmatism,and the deep concealed rock mass provides thermal power.Under the action of the regional tectonic stress field,a fault structure dominated by interlaminar fracture zones is formed,and the ore-bearing hydrothermal fluid moves upwards.In-band reintegration The analysis and study concluded that the vanadium-molybdenum ore in the area was formed by the hot water deposition + post-superimposition.The ore prospecting mark is determined through the analysis of the genesis and metallogenic regularity of the deposit.1:50000 geochemical exploration and Mo anomaly in 1:10000 soil measurement are the main geochemical prospecting indicators;Carbonaceous slate and carbonaceous siliceous slate in the Ordovician-Silurian Naij Tal Group's Harabayigou Formation are the main mineralization horizon;The surface is bright yellow-green,brick red or even black powder,accompanied by strong limonite mineralization,and jarosite is the prospecting mark of the horizon;Late stage strong structural superposition and hydrothermal alteration are also important prospecting indicators.