In the western Songnen Plain in China, the alkalization degree of water bodies is high in the limnic wetlands. Generally, pH is above 8.0, and the hydrochemical types belong to HCO32--Na＋ . Through analysis on the ba...In the western Songnen Plain in China, the alkalization degree of water bodies is high in the limnic wetlands. Generally, pH is above 8.0, and the hydrochemical types belong to HCO32--Na＋ . Through analysis on the basic saline variables such as CO32-, HCO32-, Cl-, Ca2＋ , Mg2＋ , SO42-, Na＋ etc. and the composed variables such as （ Cl-＋ SO42-） / HCO32-and Na＋ /（ Ca2＋ ＋ Mg2＋ ） , the relationships between different variables were found, and the discriminant function and critical region map based on the pH value are obtained, and the function could be applied as one of the significant study methods on the investigation of saline-alkaline water-body. The relative analysis shows that the correlations are different among different salt variables, and some of them reaches significant level (α =0.01). Specially, in the western Songnen Plain, the lithofacies material of soil is mainly formed by the weathering of basalt and granite, and they are deposited inside the plain through running water transportation, so the NaAlO2, Na2SiO3 and NaHSiO3 in them can react with water and carbonate to form soda, which leads to the high correlations between Na＋ and CO32-, HCO32-, Cl-, SO42-, and the correlation between Na＋ and Na＋ /（ Ca2＋ ＋ Mg2＋ ） is the highest. Moreover, because of high evaporation, the salts that are in the groundwater is congregated on the earth’s surface, the dissoluble salts (Cl-,SO42-) turn into lake, which accounts for the reason for the high correlation between Cl-and SO42-.展开更多
The architectural patterns of sedimentary succession are diverse in different depositionalbasins. The sedimentary architecture and geological condition of such basins asepicontinental sea, intraplate limnic basins, et...The architectural patterns of sedimentary succession are diverse in different depositionalbasins. The sedimentary architecture and geological condition of such basins asepicontinental sea, intraplate limnic basins, etc., differ cIearly from those of continentalmargin basin. Extension, complement and perfection of sequence stratigraphic models are needed in the studies of various depositional basins based on the classical sequence model. This paper, for this reason,expounds the thought, principles of sequence division, methodology and technology of the study of sequence stratigraphy in epicontinental and limnic basins.展开更多
基金Under the auspices of the Limnic Foundation of the Chinese Academy of Sciences!(zkhz-2-3).
文摘In the western Songnen Plain in China, the alkalization degree of water bodies is high in the limnic wetlands. Generally, pH is above 8.0, and the hydrochemical types belong to HCO32--Na＋ . Through analysis on the basic saline variables such as CO32-, HCO32-, Cl-, Ca2＋ , Mg2＋ , SO42-, Na＋ etc. and the composed variables such as （ Cl-＋ SO42-） / HCO32-and Na＋ /（ Ca2＋ ＋ Mg2＋ ） , the relationships between different variables were found, and the discriminant function and critical region map based on the pH value are obtained, and the function could be applied as one of the significant study methods on the investigation of saline-alkaline water-body. The relative analysis shows that the correlations are different among different salt variables, and some of them reaches significant level (α =0.01). Specially, in the western Songnen Plain, the lithofacies material of soil is mainly formed by the weathering of basalt and granite, and they are deposited inside the plain through running water transportation, so the NaAlO2, Na2SiO3 and NaHSiO3 in them can react with water and carbonate to form soda, which leads to the high correlations between Na＋ and CO32-, HCO32-, Cl-, SO42-, and the correlation between Na＋ and Na＋ /（ Ca2＋ ＋ Mg2＋ ） is the highest. Moreover, because of high evaporation, the salts that are in the groundwater is congregated on the earth’s surface, the dissoluble salts (Cl-,SO42-) turn into lake, which accounts for the reason for the high correlation between Cl-and SO42-.
文摘The architectural patterns of sedimentary succession are diverse in different depositionalbasins. The sedimentary architecture and geological condition of such basins asepicontinental sea, intraplate limnic basins, etc., differ cIearly from those of continentalmargin basin. Extension, complement and perfection of sequence stratigraphic models are needed in the studies of various depositional basins based on the classical sequence model. This paper, for this reason,expounds the thought, principles of sequence division, methodology and technology of the study of sequence stratigraphy in epicontinental and limnic basins.
