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| Reticulate laterites have been well-developed on the top regolith materials of South China. Two typical profiles, Linjiang and Jiaoling, are selected and their ages and major elements are determined. The data from three thermoluminescence (TL) and three optically stimulated luminescence datas reveal that both reticulate laterites of Linjiang and Jiaoling profiles correspond well with the late quaternary, especially the last interglacial. The geochemical data show that strong-weathered reticulate laterites are mainly composed of SiO2, Al2O3 and TFe, which tend to be easily assembled under warm and wet conditions, and the distributing limits are 60.32 to 67.81%, 17.52 to 21.32% and 4.17 to 5.96% in Linjiang and 50.10% to 53.14%,23.07% to 24.44%,10.18% to 11.40%, in respect. The other major elements such as Na2O, CaO, MgO, which tend to be easily eluviated under warm and wet conditions, and their distributing limits were all below 0.50%, showing being violently eluviated. These geochemical characteristics (such as major elements' distributings, weathering eigenvalues and CIA values) indicated both reticulate laterites of Linjiang and Jiaoling profiles have undergone the intensive weathering of biochemistry under the tropical-subtropical wetter and warmer climate-environment, which apparently reflects the climate was rather wetter and warmer during late quaternary, especially the last interglacial in Northeastern Guangdong province. |
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| Keywords:Major element; reticulate laterites; indicative weathering intensity; Northeastern Guangdong Province |
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