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Abstract

Project Objectives

1. To determine the primary geological, geochemical and structural controls on the location and timing of base metal mineral deposits in sedimentary basins.
2. To investigate the physical and hydrological processes involved in the evolution and movement of metalliferous fluids in sedimentary basins.
3. To investigate the chemical processes controlling brine compositions and metal sulphide accumulation during fluid movements in sedimentary basins, including the relationships between copper and lead-zinc deposition.
4. To develop geological and geochemical vectors to a variety of styles of sedimentary base metal mineralisation that may be used in the exploration for large tonnage deposits.

Research Framework
This research project is a three-year extension to project P384. The project involves a multidisciplinary approach using regional geological, geophysical and structural studies, brine chemical modelling and geochemical and isoitopic halo studies to provide a foundation on which to build a network of exploration criteria and ore deposit models for major sediment-hosted base metal deposits.
The project consists of three research modules as outlined below:

BASIN ANALYSIS
• structure
• sedimentology
• basin stratigraphy
• fluid movements

BRINE CHEMISTRY
• chemical modelling
• alteration and fluid chemistry
• metal deposition

DEPOSIT HALOS
• geochemical vectors
• extent and composition
• radiogenic isotope signature
* stable isotope vectors

THIS REPORT

This is the first progress report of the project extension P384A aned covers the seven-month period from September 1995 to March 1996. The commencement of the project was delayed for several months in 1995 until the success of the matching ARC Collaborative Grant was confirmed. Good progress has been achieved since the commencement date, although aspects of the research are not fully reported in this progress report.

Emphasis to date has concentrated on sedimentological and diagenetic studies in the Lawn Hill Platform and the McArthur Basin, to support the studies by AGSO on the NABRE project. Stuart Bull, John Dunster and Peter Winefield have been involved with the AGSO team and collaborative arrangements are progressing well. Results from the carbon-oxygen isotope studies (Large, Bull and McGoldrick) in the McArthur Basin and the alteration halo studies at Mt Novit (McGoldrick) will be presented at the April 1996 meeting, and will form the basis of a separate report to be distributed to sponsors within the next two months.

Item Type:	Report (Technical Report)
Authors/Creators:	Bull, SW and Winefield, PR and McGoldrick, PJ
Publisher:	CODES/AMIRA
Item Statistics:	View statistics for this item

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