期刊
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
卷 14, 期 2, 页码 292-316出版社
AMER GEOPHYSICAL UNION
DOI: 10.1002/ggge.20060
关键词
clay minerals; chemical weathering indices; model mantle derivation ages; recycling; Kagera catchment; East African Rift
This study investigates processes of sediment generation in equatorial central Africa. An original, complete and integrated mineralogical-geochemical database on silt-sized sediments derived from different parent rocks (basalt, granite, gneiss, metapsammite, sandstone) along the East African Rift from 5 degrees S in Tanzania to 5 degrees N in Sudan is presented and used to assess the incidence of diverse factors controlling sediment composition (source-rock lithology, geomorphology, hydraulic sorting, grain size, recycling), with particular emphasis on chemical weathering.
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