海相碳酸盐岩地层网格式测量的方法和意义——以广西来宾铁桥剖面为例  

GRID MAPPING AND MARINE CARBONATE STRATIGRAPHY:EXAMPLE FROM THE GSSP AUXILIARY SECTION OF THE GUADALUPIAN-LOPINGIAN BOUNDARY, LAIBIN, CHINA

作　　者：马晴 王文倩[1] 王伟[1,2] 盛毅迪[1] 舒玲 陈孝政 MA Qing;WANG Wen-qian;WANG Wei;Sheng Yi-di;SHU Ling;and CHEN Xiao-zheng(Nanjing Insititude of Geology and Palaeontology,Chinese Acadamy of Sciences,Nanjing 210008;University of Science and Technology of China,Hefei 230026)

机构地区：[1]中国科学院南京地质古生物研究所,南京江苏210008 [2]中国科学技术大学,合肥安徽230026

出　　处：《地层学杂志》2018年第4期429-443,共15页Journal of Stratigraphy

基　　金：自然科学基金项目(No.41273004;41227801)的支持

摘　　要：基于钙、铁两种元素在地球历史演变中的物源特性及演化规律,以广西来宾铁桥剖面马滩段为例,对该剖面样品新鲜面的颜色、元素含量的纵向及横向变化进行定量测量,并对样品采集、数据收集、数据处理方法和理论依据进行了探索。研究发现,在短距离范围内,尽管同一岩层具备横向可追溯性和可对比性,但其色度和元素地球化学指标等存在明显的差异,并存在穿层现象。因此,在短距离横向地层上的变化,将对剖面的平移衔接和数据偏差造成一定程度的影响。Well exposed strata of the Matan Member at the auxiliary GSSP section of the Guadalupian- Lop- ingian boundary at Hongshuihe, Laibin, Guangxi, was investigated as a case study for vertical and lateral correlation. The color, calcium content and iron content, were documents and analyzed to infer depositional environment and sediment provenance. This work found that a traceable rock bed varies laterally over a short distance in color and elemental concentrations, suggesting that caution must be exercised in chronostratigraphic and environment correlation through lateral tracing.

关 键 词：化学地层 元素地球化学 地层横向测量 瓦尔特相律 瓜德鲁普统-乐平统界线 二叠系 铁桥剖 面 来宾 广西 

分 类 号：P539.7[天文地球—古生物学与地层学] P534.46[天文地球—地质学]