摘要
全面地介绍了同位素地质年代学、马尔柯夫过程分析(极限概率、熵分析、置换性分析)和元素地球化学在古老地层对比研究中的应用.并以武当山—安康—勉略—带中上元古界为例,系统地剖析了区内中上元古界的时代、层序、岩石组合类型、沉积旋回特征、岩石表明,分布于勉略一带的碧口群同武当山群、郧西群、耀岭河群存在显著差异,难以对比;武当山和安康两地的耀岭河群基本上可以对比,而郧西群仅相当于武当群的一部分.
The application of isotopic geochronology, Markov process analysis (limit probability. entropy analysis, replacement analysis) and element geochemistry to comparison of Precambrian strata was systematically discussed in this paper. With particular reference to middle-upper Pro-terozoic Suberathem in Wudangshan - Ankang - Mianlue area, the geological age, sequence, petrological combination,type,sedimentary cycle charactenstics substitution relation among different rocks and the abundance trend of major and minor elements in the strata were completely studied. From the study it is shown that there are distinctive difference between Bikou Group, Wudangshan Group, Yaolinghe Group and Yunxi Group and is not comparable between them; Yaolinghe Group in Wudangshan area and in Ankang area is basically comparable, whereas, Yunxi Group is partly comparable to Wudangshan Group.
出处
《矿产与地质》
1993年第1期35-42,共8页
Mineral Resources and Geology
关键词
地层
地球化学
同位素
地质年代学
Comparison of strata,Geochemistry, Markov process,Sedimentary cycle. Wudang-shan -Mianlue-Ankang area. Middle -upper Proterozoic strata
