重庆大巴山超大型陶粒页岩矿产资源的发现与研究

页岩陶粒是一种以具有自膨胀性能的页岩或板岩为唯一原料加工制备的保温隔热矿物功能材料和轻质多孔基础材料.在介绍重庆大巴山超大型陶粒页岩矿产资源地质特征基础上,采用多种现代检测技术和与国内同类原料对比方法,研究了代表性陶粒页岩和生产试验样品的矿物材料学特征,结果表明:重庆大巴山城口—巫溪是优质陶粒页岩矿产资源的集中分布区,...

DISCOVERY AND RESEARCH OF SUPER-LARGE SCALE CERAMSITE SHALE MINERAL RESOURCES IN DABA MOUNTAIN,CHONGQING

Shale ceramsite is a kind of thermal insulation mineral functional material and light porous basic material,which is processed and prepared by self-expanding shale or slate as the only raw material.Based on the introduction of geological characteristics of super-large scale ceramsite shale mineral resources in Daba Mountain,Chongqing,the mineralogical characteristics of representative ceramsite shale and production test samples are studied by using a variety of modern detection techniques and then comparing it with similar domestic raw materials.The results show that Chengkou-Wuxi area of Chongqing is the concentrated distribution area of quality ceramsite shale mineral resources,and the ore-forming type of ore-bearing layer belongs to the sedimentary origin of shallow water shelf environment.Two kinds of ceramsite shales,gray-green shale and black shale,are newly discovered in the area,which represent two ore-bearing layers.The gray-green shale is located in the lower part of the Silurian Xintang Formation(S1x),and the black shale is located in the upper part of the Silurian Longmaxi Formation(S1l).According to the detailed investigation,the resource distribution of the Erlongzhai ceramic shale deposit in Zhiping Township of Chengkou County is well concentrated,with total ore layer thickness of 352.6 m,and with average thickness of the ore body of 124.24 m.In an exploration area of 0.165 km2,the determined resource amount is 4753 million tons,and the prospective resource amount is predicted to be 800 million tons.Grey-green shale and black shale in Chengkou-Wuxi area have excellent expansion properties,and at the calcination temperature of 1150℃,they have the average expansion ratio of 4.17 and 4.01 and porosity of 76%and 75%,respectively.Comparative analysis of samples from Chengkou-Wuxi ceramsite shale indicates that the ceramsite shale has the same or similar chemical composition,mineral composition,texture and structures.The ceramsite shale has silty argillaceous structure and microlenticular structure and the chemical composition of ceramsite shale is as follow:SiO262%±,Al2O318%±,TiO20.9%±,Fe2O37%-10%,MgO 3%±,CaO 0.6%±,K2O 4.7%±,Na2O 1%±.Mineral composition of ceramsite shale is as follow:quartz 30%-35%,illite 28%-45%,green mudstone 14%-18%,plagioclase 7%-11%,pyrite 0%-2.5%.It shows that the self-swelling property of ceramsite shale is not only related to the higher flux composition(K2O+Na2O+MgO+CaO=9.3%±),but also related to the higher total organic carbon TOC(≥0.052%)and Fe2O3,as well as related to the special lense structure of the rock.