Abstract

Iron oxide-copper-gold (IOCG) mineral systems occur globally and range in age from Archean to Mesozoic or younger. An assessment for IOCG mineral system potential has been undertaken in the southern Arunta Region, incorporating the southern Aileron and northern Warumpi provinces. The assessment has been undertaken in a GIS-based environment using a mineral systems approach. This approach recognises four key system components: (1) sources of metals and fluids, (2) fluid-flow drivers, (3) fluid-flow pathways and architecture, and (4) depositional sites and mechanisms. For each of these key system components, mappable criteria were developed as proxies for mineralising processes in order to identify potential IOCG mineral systems. The locations of known deposits and prospects were not used for generating the assessment of IOCG potential. However, they are used as a validation of the results. The assessment largely reproduces the locations of known IOCG-style mineralisation, and predicts additional potential in a number of other areas, many of which are obscured by recent sedimentary cover. An approximately east-west-trending belt of broad IOCG potential has been identified, along with local regions of high potential where favourable criteria occur.
Google map showing geographic bounding box with values North bound -22.0 East bound 138.0 West bound 126.0 South bound -24.0

Product Type/Sub Type

nonGeographicDataset

Constraints

Creative Commons Attribution 4.0 International Licence

IP Owner

Commonwealth of Australia (Geoscience Australia)

Author(s)

Date (publication)

2013-01-01T00:00:00

Product Type

nonGeographicDataset

Topic Category

geoscientificInformation

GA Catalogue Number

76423 Product http://www.ga.gov.au/metadata-gateway/metadata/record/76423/

Keywords

Promotional Material
mineral exploration
prospectivity
AU-NT
AU-WA
Geology

Resource Language

English

Resource Character Set

utf8

Resource Security Classification

unclassified

Geographic Extent

North bound
-22.0
East bound
138.0
West bound
126.0
South bound
-24.0

Lineage

Criteria for the assessment of the potential for iron oxide-copper-gold mineral systems were developed from geological, geochemical and geophysical data. The basement solid geology dataset used in this study was compiled for the study area using published solid geology datasets, 1:1 000 000 and 1:250 000 maps of surface geology, and new interpretation of magnetic and gravity data. The basement solid geology utilised is a preliminary interpretation and is solely intended to be used for the assessment of iron oxide-copper-gold potential in this study. Geochemical data were sourced from Geoscience Australia's OZCHEM national whole rock geochemistry database and the Northern Territory Geological Survey's open-file whole rock geochemical database. Magnetic and gravity geophysical data were used to produce the solid geology map, as well as for developing a number of the criteria used in this assessment such as modelling of iron oxide alteration. These data were sourced from Geoscience Australia databases and are publicly available via the Geoscience Australia website. Derivative products of the input datasets were developed for the assessment (e.g., buffering). Decisions concerning the development of these derivatives, such as the selection of buffer distances and assignment of cutoff values, were made subjectively based on the scientific judgement of the analyst. Further information regarding the datasets used, data processing steps, criteria weightings and scientific rationale can be found in the accompanying metadata and pamphlet.

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

Preliminary solid geology interpretation for the southern Arunta IOCG assessment. This dataset is in preliminary form only, and was developed specifically for the IOCG assessment.
OZCHEM national whole rock geochemistry database (http://www.ga.gov.au/meta/ANZCW0703011055.html). Custodian: Geoscience Australia
Northern Territory Geological Survey geochemical datasets (whole rock). Accessed from http://geoscience.nt.gov.au/strike Custodian: NTGS Open file.
Milligan, P.R., Franklin, R., Minty, B.R.S., Richardson L.M. and Percival, P.J. 2010. Magnetic anomaly map of Australia. Fifth edition. Geoscience Australia: Canberra.
Bacchin, M., Milligan, P.R., Wynne, P. and Tracey, R. 2008. Gravity anomaly map of the Australian region. Fourth edition. Geoscience Australia: Canberra.

Metadata File Identifier

ded700c7-838b-6570-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