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| Titel: |
Weathering of some Triassic shales in the Sydney area |
| Auteur: |
Loughnan, F. C. Grim, R. E. Vernet, J. |
| Verschenen in: |
Australian journal of earth sciences |
| Paginering: | Jaargang 8 (1962) nr. 2 pagina's 245-257 |
| Jaar: |
1962 |
| Inhoud: |
The mineralogy of seven weathered profiles derived from Triassic shales in the Sydney area has been examined by X-ray and chemical techniques. The illite of the parent shales is converted, through the loss of potassium ions, to montmorillonite-illite inter-layered minerals in the leached shale and mottled zones; but in the soil zone, where maximum leaching occurs, these inter-layered minerals tend to form kaolinite and a 14Å mineral with properties similar to vermiculite. It is considered that the oxidation of adsorbed ferrous ions has been responsible for the development of the vermiculite-like mineral. Though quartz is lost from the profiles, the kaolinite content increases surfacewards at the expense of illite and related degraded products. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 10 van 10 gevonden artikelen
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