HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Jones, L. H. P. Articles by Attiwill, P. M. Search for Related Content PubMed Articles by Jones, L. H. P. Articles by Attiwill, P. M. GeoRef GeoRef Citation Agricola Articles by Jones, L. H. P. Articles by Attiwill, P. M.

Dioctahedral Vermiculite and Chlorite in Highly Weathered Red Loams in Victoria, Australia¹

ABSTRACT

Red loams from an old divide in Victoria, Australia, have been examined by optical, X-ray diffraction, chemical, and thermal methods. The soils have developed on intrusive granodiorite and associated metamorphosed Silurian rocks. The clay fractions of the surface soils on the metamorphosed rocks contained dioctahedral vermiculite with interlayer alumina and the clays of the surface soils on the granodiorite contained dioctahedral chlorite. The chlorite decomposed when heated between 300° and 400°C. which corresponds to the temperature at which gibbsite decomposes. The chlorite also decomposed when treated (with KOH and KCl) to remove interlayer alumina. The weathering in the red loams is correlated with the mineralogy of the sand fractions and the parent rocks.

¹ A project of the Division of Plant Industry, Commonwealth Scientific and Industrial Research Organization (C.S.I.R.O.), c/o School of Agriculture, University of Melbourne, Victoria, Australia. The authors gratefully acknowledge the help in various ways of W. F. Cole, G. W. Leeper, H. W. Worner, and H. C. Forster.

² Principal Research Officer and Honorary Research Associate, C.S.I.R.O., c/o School of Agriculture, University of Melbourne; and Research Student, Forestry Department, University of Melbourne, respectively.

Received for publication April 8, 1963. Accepted for publication August 19, 1963.