Abstract

Magmatic-related uranium systems represent an uncommon, yet significant family of uranium mineral systems. Despite the extremely large size of some magmatic-related uranium deposits, the key processes controlling uranium deposition are poorly understood compared to other more common uranium deposit styles. Petrographic, geochemical and fluid inclusion studies have been undertaken at the Crocker Well granite-hosted uranium deposit in South Australia in order to better constrain the key processes in uranium mineralisation there. The results of this study allow a genetic model for the Crocker Well deposit to be proposed. Uranium mineralisation is interpreted to be associated with the intrusion of a volatile and sodium-rich pulse of magma, or with the localised release of a highly sodic fluid from the main granitic rocks in the area. Volatile saturation and fluid exsolution partitioned uranium and thorium into a magmatic-hydrothermal fluid phase, and initiated the creation of fractures, veins and breccia zones. These acted as fluid flow pathways for the magmatic fluid. Uranium deposition likely occurred as a result of temperature or pressure decrease. This genetic model has been translated into a number of mappable criteria which may be used in prospectivity studies for magmatic-related uranium systems. The presence of evidence suggesting the potential to generate a uranium-bearing magmatic fluid, evidence of permeable structures contemporary with igneous activity, and evidence of favourable host rocks are suggested as useful criteria.
Google map showing geographic bounding box with values North bound East bound West bound South bound
Related Links

Product Type/Sub Type

nonGeographicDataset

Constraints

Creative Commons Attribution 4.0 International Licence

IP Owner

Commonwealth of Australia (Geoscience Australia)

Author(s)

Date (publication)

2012-01-01T00:00:00

Product Type

nonGeographicDataset

Topic Category

geoscientificInformation

GA Catalogue Number

72058 Product http://www.ga.gov.au/metadata-gateway/metadata/record/72058/

Keywords

GA Publication
Record
depositional mechanisms
geochemistry
metallogenesis
AU-SA
Earth Sciences

Resource Language

English

Resource Character Set

utf8

Resource Security Classification

unclassified

Lineage

Unknown

Digital Transfer Options

onLine

Distributor

Role
distributor
Organisation Name
Commonwealth of Australia (Geoscience Australia)
City
Canberra
Administrative Area
ACT
Postal Code
2601
Country
Australia
Email Address

Source Description

Source data not available.

Metadata File Identifier

a551f311-caa0-0679-e044-00144fdd4fa6

Metadata Standard Name

ANZLIC Metadata Profile: An Australian/New Zealand Profile of AS/NZS ISO 19115:2005, Geographic information - Metadata

Metadata Standard Version

1.1

METADATA SECURITY CLASSIFICATION

unclassified

Metadata Contact

Role
pointOfContact
Organisation Name
Commonwealth of Australia (Geoscience Australia)
City
Canberra
Administrative Area
ACT
Postal Code
2601
Country
Australia
Email Address
Related Links