e-ISSN 2231-8542
ISSN 1511-3701

Home / Regular Issue / JTAS Vol. 26 (2) Sep. 2003 / JTAS-0267-2003


Weathering Behaviour of a Basaltic Regolith from Pahang, Malaysia

J. Hamdan, M. Peli & B. Ruhana

Pertanika Journal of Tropical Agricultural Science, Volume 26, Issue 2, September 2003

Keywords: Regolith, weathering, saprolite, elemental mobility

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The characteristics and degree of weathering in a deep saprolitic regolith developed on basalt were investigated. A 15 m deep regolith of soil-saprolite-rock sequence, located along a new road cut in Pahang, Malaysia, was selected. The intensity of weathering in this regolith was assessed by various weathering indices, as well as by the changes in the physico-chemical properties, clay mineralogy and the microfabric characteristics of the profile. All assessments gave strong evidences of intense weathering, even at the stage of saprock formation. Extreme depletion of major elements such as K, Na, Ca and Mg, and significant enrichment of Fe, Ti, Cu and Nb occurred during saprolitization process, and, these perhaps explain the extreme weathering pattern of this regolith.

ISSN 1511-3701

e-ISSN 2231-8542

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