皖北地区早古生代岩石地层划分及其物质组成和工业用途

DIVISION,SUBSTANCE COMPOSITION AND INDUSTRIAL USE OF EARLY PALEOZOIC ROCK AND STRATUM IN NORTH ANHUI

在现代地层学和沉积学理论的指导下,地层多重划分对比研究的岩石地层单位的重新厘定是当代最具科学化、系统化和现代化,也最容易被地层工作者乐于接受的。笔者多年来积累了区内实测地层剖面以及测试分析的大量丰富的实际资料。(1)在此基础上,参照《安徽省岩石地层》,对淮北地层小区进行了岩石地层单位的具体划分,指出了各组段的岩性特征、典型分界标志及其各地层单位间的接触关系;(2)利用大量测试分析资料,系统地研究了淮北地层小区早古生代岩石地层的物质组成,各组段三种矿物成份(方解石、白云石、石英)、八项化学成份(CaO、MgO、SiO2、Al2O3、k2O、Na2O、TFe、P2O5)和九种微量元素(Cu、Mo、Co、Ni、Sr、Ba、Ti、Mn、B)的平均含量。为区域定量地层学提供了丰富的基础性资料,也为内生金属矿床赋矿层位研究提供了有益的帮助;(3)按照全国储量委员会有关沉积矿床的工业要求,指出了淮北地层小区内早古生代岩石地层各组段中的沉积矿产的工业用途,为今后在皖北地区寻找非金属层型矿产指明了方向。上述成果对野外地质填图、金属矿床地质勘查、定量地层学研究以及非金属层型矿床普查工作中都有着十分重要的作用。

Under the guidance of up-to-date stratigraphy and sedimentation theory,re-determination of rock and stratigraphic units in stratigraphic multiple division and comparing study is currently most scientific,systematic and advanced,and most easily acceptable to stratigraphic workers.For many years in the past,the authors have amassed a great deal of materials on measured stratigraphic profiles and tests in the area.On this basis,by reference to Rocks and Stratigraphy in Anhui Province,this paper made a specific division of rocks and stratigraphic units in the Huaibei stratigraphic sub-zone and pointed out lithological features and typical boundary markers of each formation and each member,including contact relations between each stratigrpahic unit;secondly,by using a large quantity of testing and analytical data,it systematically studied the substance composition of early Paleozoic rocks and stratigraphy in the Huaibei stratigraphic sub-zone,and concluded the averages of 3 minerals（calcite,dolomite and quartz）,8 chemical components（CaO,MgO,SiO2,Al2O3,K2O,Na2O,TFe,P2O5）and 9 trace elements（Cu,Mo,Co,Ni,Sr,Ba,Ti,Mn,B）in each formation or member,providing abundant basic data for regional quantitative stratigraphy and facilitating the study on the ore host of endogenic metallic deposit;in compliance with industrial requirements for sedimentary ore deposits by national reserve commission,it also described the industrial use of sedimentary ore deposits in each formation or member of early Paleozoic rocks and stratigraphy in the Huaibei stratigraphic sub-zone,showing the direction for prospecting non-metallic strata-bound minerals in north Anhui.The above-mentioned results will play an important role in field geological mapping,geological prospecting of metallic deposits,quantitative stratigraphic research and reconnaissance of non-metallic strata-bound deposits.