Filters: Tags: mississippi river basin (X) > Categories: Publication (X) > partyWithName: Duval, J S (X)
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Stream-bed sediment for the size fraction less than 150 μm, examined in 14,000 samples collected mostly from minor tributaries to the major rivers throughout the Mississippi River drainage system, is composed of 5 mineral fractions identified by factor analysis—Al-silicate minerals, quartz, calcite and dolomite, heavy minerals, and an Fe–Mn fraction. The Al-silicate fraction parallels its distribution in the regolith, emphasizing the local sediment source as a primary control to its distribution. Quartz and the heavy-mineral fraction, and associated trace elements, exhibit a complementary distribution to that of the Al-silicate fraction, with a level of enrichment in the bed sediment that is achieved through winnowing...
Categories: Publication;
Types: Citation;
Tags: Geochemistry,
Mississippi River Basin,
Stream sediment,
Weathering,
pollutants
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