Origin Of The Siliceous Rocks And Arboniferous Siliceous Limestone In The Middle-upper Permian And Its Relationship To Manganese Mineralization In Manganese Mining Area Of Zuiyi In Guizhou

In this paper,the carbon siliceous limestone Zunyi Manganese Mine in Upper Permian "white mud layer","wall siliceous rocks and Zunyi Manganese containing manganese rocks as the research object.The structure types of the carbon-Silica Limestone and the " wall type of silica " are studied in detail.Combined with rock sample under microscope and with specific characteristics of the siliceous limestone " white mud layer "," wall siliceous rock " has no biological structure and metasomatic texture.A detailed study of the Zunyi Manganese Mine in carbonaceous siliceous limestone and the upper Permian series," white mud layer in the siliceous material,wall siliceous rocks and Zunyi Manganese containing trace elements in manganese rocks and REE geochemical characteristics.Reveals the carbonaceous siliceous limestone "white mud layer","wall siliceous rock siliceous may be derived from hydrothermal and chemical origin.Analysis of the " white carbon mineralization mud layer siliceous limestone and siliceous rock wall type and ore.The metallogenic mechanism of Zunyi manganese ore is discussed.The main achievements are as follows:Zunyi Mineland carbon siliceous limestone in the Permian Maokou Formation in second.In stratigraphic section as zunyi manganese plate output,accidentally caught a flint tuberculosis.Under microscope,the siliceous component of carbon siliceous limestone in the presence of the cryptocrystalline form.Siliceous limestone micritic bioclastic structure,bioclastic is semi automatically to it,bioclastic mainly in the Zhongsha level range,good sorting,rich in micrite that cryptocrystalline siliceous minerals(quartz)deposition of water environment for low-energy environments.A special sedimentary body of the " wall type silicon rock" of the Zunyi manganese deposit.In the "white mud layer containing a small amount of manganese,carbon siliceous limestone in Zunyi and its surrounding areas.The third section of the " bio limestone " and " manganese bearing rock series of manganese bearing rocks " in the three section.Siliceous quartz to cryptocrystalline,microcrystalline form existence,is not aligned,siliceous quartz accounted for about more than 96% of the whole rock,other ingredients for a very small amount of mud,iron and other ingredients and found no biological structure and metasomatic texture features.On the " white carbon silicon mud layer limestone samples to remove carbonate components.The Ni/Co value of the silicon components ranged from 11.83 to 10.02,V/(V+Ni)values between to 0.90,V/Cr values were more than 2,Th/U values ranged from 0.2 to 0.02,Ce/Ce* between 0.93 to 0.45,and ranged from to 0.64,The reduction environment is reflected in the silica formation in the silica limestone;The close of Ce/Ce* value and Ce/Ce* value of the ocean basin indicates that the deposition of the silica occurred in the deep sea.The lower value of Th/U reflects that the silica component may come from the deep part.The Eu/Eu* of the silica component showed positive Eu anomaly characteristics.That "the composition of white siliceous siliceous limestone in the mud layer" may come from the hot water.The Ce/Ce* value of "wall type silica rock" of Zunyi manganese deposit is between 0.66 and 0.32,and the La/Ce value is between 3.77 and 1.642.It Shows that the formation of the silica is in the oceanic basin.The formation of the Zunyi area in the vicinity of the existence of a strong continental expansion,the role of cracking,there are hot liquid to join.The Ba/Sr value of the wall type silica rock is greater than 1,and the value of U/Th is greater than 1.The total amount of rare earth REE is low(average value is 11.06 ug/g),which is about 1/17 of the total amount of rare earth in north America.It consistent with the rare earth element content in the typical hydrothermal silica.Nearly all of the Eu* Eu/ value of the silica rock was more than 1,and almost all the samples showed significant positive Eu anomalies,which showed that the silica derived from the hydrothermal solution.In the limestone-manganese ore layer of Zunyi manganese manganese,the contents of four elements Mn,Ti,Zr,Th between guimeng limestone and manganese ore Ko Iwayong erosion near the surface began to increase.And it began to decrease in the ancient karst erosion surface on the upside in the manganese ore layer,which reduced to the lower strata carbonaceous siliceous limestone.Moreover,guimeng limestone-manganese ore layer,the correlation coefficients of three kinds of elements Mn and Ti,Zr and Th were 0.54,0.45,0.53.It introduces that "White mud layer" carbon siliceous limestone erosion may provide a source for Zunyi manganese ore.Through the analysis of distribution characteristics of "chert" walls and manganese ore,"wall type siliceous rock mass" to control the output and distribution of Zunyi manganese mine.