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A Study of a Deep Weathering Profile on Granite in Peninsular Malaysia: I. Physico‐Chemical and Micromorphological Properties
Author(s) -
Eswaran H.,
Bin Wong Chaw
Publication year - 1978
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1978.03615995004200010032x
Subject(s) - weathering , geology , silt , mineralogy , clay minerals , geochemistry , rock fragment , geomorphology , quartz , paleontology
To facilitate description and study, the deep profile is divided into several morphological zones, via., α, γ m , γ p and δ zones. Clay content progressively increases from the rock zone δ to the soil zone α. The silt/clay ratio increases from the δ to the upper part of the γ p zone and then decreases again. These changes are explained in terms of the fragmentation or aggregation of various minerals during the clay separation procedure. Estimates of the mineralogical composition in the fine earth shows differences in the zones, and the charge characteristics are related to these. Changes in the microfabric are monitored with thin‐sections. Micrographs are presented showing fabric characteristics and some examples of pseudomorphic alteration. A brief discussion on the genesis of the profile is given.