Abstract
An investigation has been made of the chemical and mineralogical transformations which have accompanied the weathering of six basic volcanic rocks from eastern New South Wales. Montmorillonite is initially formed from the destruction of the olivine, pyroxene, and plagioclase in the parent rock, but, in the near-surface horizons, this mineral is unstable and may form kaolinite, halloysite, or a poorly crystalline montmorillonite. The alumina content shows a steady increase up the profiles, whereas the alkalis, alkaline earths, and some of the silica have been lost in the ground-waters during the mineral transformations. Marked concentrations of iron and titanium occur at specific levels in some of the weathering profiles and explanations of these phenomena are given.
Keywords
WeatheringHalloysiteKaolinitePlagioclaseGeologyMontmorilloniteGeochemistryMineralClay mineralsOlivineVolcanoMineralogyParent rockChemistryMetallurgyQuartzMaterials science
Related Publications
MAGMATIC DIFFERENTIATION IN TERTIARY AND QUATERNARY VOLCANIC ROCKS FROM ADAK AND KANAGA ISLANDS, ALEUTIAN ISLANDS, ALASKA
Research Article| May 01, 1952 MAGMATIC DIFFERENTIATION IN TERTIARY AND QUATERNARY VOLCANIC ROCKS FROM ADAK AND KANAGA ISLANDS, ALEUTIAN ISLANDS, ALASKA ROBERT R COATS ROBERT R ...
The Bearing of Lead Isotopes on the Source of Granitic Magma
The isotopic composition of lead was measured in Mesozoic and Cenozoic igneous rocks (including volcanic glasses, olivine basalts, and potassium feldspars from granitic rocks) o...
A Chemical Classification of Volcanic Rocks Based on the Total Alkali-Silica Diagram
This contribution summarizes and brings up to date the recommendations made by the IUGS Subcommission on the Systematics of Igneous Rocks for the classification of volcanic rock...
Lineages and Fractionation Trends in Undersaturated Volcanic Rocks from the East Otago Volcanic Province (New Zealand) and Related Rocks
Journal Article Lineages and Fractionation Trends in Undersaturated Volcanic Rocks from the East Otago Volcanic Province (New Zealand) and Related Rocks Get access D. S. COOMBS,...
Fundamentals of Soil Behavior
Preface. CHAPTER 1: INTRODUCTION. 1.1 Soil Behavior in Civil and Environmental Engineering. 1.2 Scope and Organization. 1.3 Getting Started. CHAPTER 2: SOIL FORMATION. 2.1 Intro...
Publication Info
- Year
- 1964
- Type
- article
- Volume
- 2
- Issue
- 2
- Pages
- 218-234
- Citations
- 100
- Access
- Closed
External Links
Social Impact
Altmetric
PlumX Metrics
Social media, news, blog, policy document mentions
Citation Metrics
100
OpenAlex
Cite This
D.C. Craig,
F. C. Loughnan
(1964).
Chemical and mineralogical transformations accompanying the weathering of basic volcanic rocks from New South Wales.
Australian Journal of Soil Research
, 2
(2)
, 218-234.
https://doi.org/10.1071/sr9640218
Identifiers
- DOI
- 10.1071/sr9640218