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(Article of periodic en Anglais - 1982)

Document title

Nature and distribution of Harmettan dust

Authors(s) and Affiliation(s)

McTAINSH G. H. ; WALKER P. H. ;

Abstract

Harmettan dust deposition rates measured at Kano northern Nigeria during 1976-1979 range from 137 to 181 t/km/y. The characteristics and geomorphic history of the Chad Basin source deposits are inferred from the broad particle-size range, and the mineralogical and geochemical characteristics of the deposited dust. Sediment supply to the lake source deposits involves fluvio-lacustrine transport of clays, with fluvial transport and salt weathering of silts and aeolian transport of sands. Subsequent aeolian deflation of these produces the Harmattan dust plumes.

Source

Article of periodic

published at : Zeitschrift für Geomorphologie Stuttgart

Editor :

Millesime : 1982, vol. 26, no4 [pp. 417-435]

Bibliographic references : 43 réf.

Language

Anglais

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