Abstract Based on the study of stratigraphy and quantitative sedimentology of fundamental stratrigraphic sections, according to the “single factor analysis and comprehensive mapping method”, various single factor maps and quantitative lithofacies palaeogeography maps of the Yanguan age and Datang age of the Early Carboniferous, and Weining age and Maping age of the Late Carboniferous in South China, were compiled. These palaeogeography maps possess three characteristics, iequantification, multirank and multitype Quantification means that the determination of each palaeogeographical unit is based on quantitative single factor dataThis makes palaeogeography develop to the quantitative stage Multirank means that palaeogeographic units are classified into three ranks or more than three ranks For instance, lands and seas are the first rank, and in seas, the platforms, basins and slopes are defined and belong to the second rank. In platforms, the banks, tidal flats and reefs are further drawn out and belong to the third rank. In second rank basins, there are third rank platforms which include fourth rank banks and reefs Multitype means that each palaeogeographic unit, especially the 2nd rank or 3rd rank units, can be further divided into different types on the basis of their rock types For instance, platforms can be classified into carbonate platforms, clastic platforms, etc; basins can be classified into carbonate basins, clastic basins, siliceous basins, turbidite basins, etc.; and banks can be classified into sparry grain banks, limemud grain banks, mixed grain banks, etc The features of the lithofacies palaeogeography of each age of the Carboniferous can be summerized as following. There were lands and seas In seas there were platforms, basins and slopes In platforms there were banks and reefs In platforms there were basins In basins there were platforms Between platforms and basins there were slopes There were a variety of platforms, basins and banks The evolution of the lithofacies palaeogeography of the Carboniferous in South China was characterized with succession, development and stage
|
|