- 责任者：Feng Zhigang (State Key Laboratory of Geochemistry ; Institute of Geochemistry ; CAS ; Guiyang 550002 ; China） ; Wang Shijie
- 刊名：Acta Geologica Sinica
- 出版年：2009
- 卷期：83(6)
- 关键词：风化壳 ; weathering crust ; 石英 ; quartz ; 贵州 ; Guizhou Province
- 页码：p.885-893
- 图表：11 illus., 1 table, 29 refs.
- 分类号：1400
- issnNo：ISSN0001-5717
- isbnNo：CN11-1951/P
///Through studying weathering characteristics of red weathering crusts developed on carbonate rocks from different stratum systems in the Guizhou karst region(including western Hunan Province),and comparing with those developed on other types of bed rocks in native and ambient areas in the same climatic zone, the authors draw conclusions as follows: 1) in the regions where weathering is not much intense, weathering intensities of red weathering crusts of carbonate rocks are affected markedly by the components of their acid-insoluble residua, and the higher weathering maturity of acid-insoluble residue, in general, the more intense weathering degree of red weathering crust; 2) further weathering potential of weathering crust falls along with increasing of weathering maturity of acid-insoluble residue, and consequently weathering equilibrium can be reached more easily; 3) at the sharply transitional interface between rock and soil, geochemical index of acid-insoluble residua change distinctly along with leaching loss of carbonate; and 4) owning to occurrence of acid-insoluble residua of carbonate rocks during kaolinization and even weak laterization, weathering crusts of carbonate rock are more vulnerable to weathering than that of crystalline rocks, and show a high weathering intensity. Therefore, it is not appropriate to classify the weathering crust of carbonate into the weak weathering type, which is even much weaker than that of crystallized rock weathering types such as basalt and granite.