重庆大巴山超大型陶粒页岩矿产资源的发现与研究  

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

作　　者：汪灵[1] Wang Ling(Chengdu University of Technology,Chengdu,Sichuan 610059,China)

机构地区：[1]成都理工大学,四川成都610059

出　　处：《矿物岩石》2021年第1期1-14,共14页Mineralogy and Petrology

基　　金：国家自然科学基金项目(41972039);四川省教育厅资助科研项目(16TD0011)。

摘　　要：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,含矿层的成矿类型属于浅水陆棚环境的沉积成因;区内新发现灰绿色页岩和黑色页岩两种陶粒页岩,分别代表新发现的两个含矿地层层位,其中灰绿色页岩矿层位于志留系新滩组(S_1x)下部,黑色页岩矿层位于志留系龙马溪组(S_1l)上部;根据详查工作,城口县治平乡二龙寨矿区陶粒页岩矿床的资源分布非常集中,矿层总厚度达352.6 m,矿体平均厚度124.24 m,在勘探面积0.165 km~2范围查明资源量4 753万吨,预测远景资源量8亿吨,其矿床规模属超大型;城口-巫溪灰绿色页岩和黑色页岩的膨胀工艺性能优异,在焙烧温度1 150℃时的平均膨胀倍数分别为4.17和4.01,孔隙率分别为76%和75%;城口-巫溪陶粒页岩及其对比分析样品化学成分、矿物成分、结构构造等都相同或相似,即:化学成分(w(B)/%)SiO_262±,Al_2O_318±,TiO_2 0.9±,Fe_2O_3 7~10,MgO 3±,CaO 0.6±,K_2O 4.7±,Na_2O 1±,矿物成分(w(B)/%)石英30~35、伊利石28~45、绿泥石14~18、斜长石7~11、黄铁矿0~2.5,具粉砂泥质结构和显微透镜状结构;陶粒页岩的自膨胀性能不仅与较高的助熔成分有关(K_2O+Na_2O+MgO+CaO=9.3%±),而且与较高的总有机碳TOC(≥0.052%)和Fe_2O_3有关,还与岩石特殊的透镜状结构构造有关。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

关 键 词：陶粒页岩 志留系 矿床类型 页岩陶粒 矿物功能材料 重庆 

分 类 号：P579[天文地球—矿物学]