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Regolith Expression of Australian Ore Systems

A compilation of geochemical case histories and conceptual models

Compilers and Editors: C.R.M. Butt, M. Cornelius, K.M. Scott and I.D.M. Robertson

HARD COPY VOLUME NOW AVAILABLE - CLICK HERE FOR DETAILS

The geochemical expression of bedrock mineralization in the regolith is affected by geological, geomorphological and environmental conditions that are unique for every location. However, many similarities in dispersion characteristics may be present over extensive regions and it is possible to summarize these characteristics as conceptual dispersion, process and exploration models, based on evidence from suitable case histories. These models can then be used to anticipate the surface expression of mineralization in a given area, to design an effective exploration program and to evaluate any anomalies.

Two model schemes of this type have been produced: -

  • “Conceptual Models in Exploration Geochemistry, 4: Australia” by C.R.M. Butt and R.E. Smith, 1980, deals exclusively with Australian conditions and is supported by 52 case histories,
  • “Regolith Exploration Geochemistry in Tropical and Subtropical Terrains” by C.R.M. Butt and H. Zeegers, 1992 extends beyond Australia and is again illustrated by relevant case histories.

This monograph expands and updates the earlier compilations and models for Australia by including the outcomes of the last two decades of intensive exploration activity and regolith research. It will be a reference to the geochemical expression of ore systems in the Australian regolith and it is intended to sell for under $50.

Over 100 case histories will be included, from a wide range of published and unpublished sources, and include hitherto unreleased exploration data. They are being documented systematically, with authors from industry, universities, geological surveys and research organizations.

Pending publication, case histories are being progressively released as PDF files on the CRC LEME website. Downloading of individual case histories is for personal use only and subject to copyright restrictions (see copyright statement below). The status of the case histories is provisional (see disclaimer below) and there will be some further minor editing and reformatting prior to release of the monograph as hard copy.

Case histories are still being sought and potential authors should contact the compilers (Ian Robertson or Keith Scott) if they wish to contribute. It is intended to continue to add to the compilation of case histories on the web site after hard copy publication as an ongoing resource for the exploration industry.

In addition to the basic data available in the case histories, the volume will include recommendations on exploration procedures, including terrain analysis, sample type, sampling interval, analytical procedure, element selection and data interpretation, summarized and embedded in the models and described in the accompanying text. It is intended that it will provide a substantially improved understanding of the impact of weathering and regolith cover on exploration methods, leading to reductions in the cost of exploration for concealed base metal, polymetallic and gold deposits in areas of residual and/or transported regolith.

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