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The metallogenic potential of Australian Proterozoic granites. GIS data package.

Note: This metadata describes the dataset in accordance with the ANZLIC (Australia New Zealand Land Information Council) Core Metadata Guidelines Version 2.


Dataset citation

ANZLIC unique identifier: ANZCW0703003638

Title: The metallogenic potential of Australian Proterozoic granites. GIS data package.


Custodian

Custodian: Geoscience Australia

Jurisdiction: Australia


Description

Abstract:

This project is based on the recognition that combinations of specific granite types and distinctive host rocks tend to be associated with certain types of Au, Cu, Zn, Pb, Sn and W mineralisation. Rarely is Proterozoic mineralisation hosted by granites themselves, for the most part being hosted in the country rock, often three or more kilometres from the nearest known granite. There is an apparent host rock control on the deposition of metals: this can be both compositional and also controlled by the competency of the host lithologies. This compositional host rock control has been documented by Stuart-Smith et al. (1993 - Geology and mineral deposits of the Cullen Mineral field, AGSO Bull. 229) for the Pine Creek Inlier and noted in the eastern Mount Isa Inlier by Wyborn and Heinrich (1993 - The relationship between late-tectonic felsic intrusives and Cu-Au mineralisation in the Eastern Fold Belt, Mount Isa Inlier, Trans Royal Soc Edinburgh, Earth Sci, 83, 201-209).

This project collated data on the Proterozoic granites and their comagmatic volcanics, the mineralogical composition of the rocks that they intrude and briefly assessed the style and type of mineralisation present within 5 kms of an outcrop of granite. All data collated in the reports is built into the accompanying GIS, and essentially each item listed in the report is converted into a searchable item within the GIS.

This project has aimed to provide the data and interpretations to show the following:

1) Which Proterozoic granites have metallogenic potential,

2) What commodities they are likely to be associated with, and

3) Where the better host rocks are located that are likely to host potential mineralisation.

ANZLIC search words:

  • GEOSCIENCES Geochemistry Classification
  • GEOSCIENCES Geology Classification
  • INDUSTRY Mining Exploration

Spatial domain:

locality map

Geographic extent name: AUSTRALIA EXCLUDING EXTERNAL TERRITORIES - AUS - Australia - Australia

Geographic extent polygon: 112.5 -8.98, 154.5 -8.98, 154.5 -43.75, 112.5 -43.75, 112.5 -8.98,

Note: The format for each Geographic extent name is: Name - Identifier - Category - Jurisdiction (as appropriate) See GEN Register

Geographic bounding box:
North bounding latitude: -8.98 °
South bounding latitude: -43.75 °
East bounding longitude: 154.5 °
West bounding longitude: 112.5 °

Data currency

Beginning date: 1995-09-01

Ending date: 2001-10-10


Dataset status

Progress: Complete

Maintenance and update frequency: Not Known


Access

Stored data format:
DIGITAL - dat Data file MapInfo Geographic GDA94
DIGITAL - ArcGIS-coverage ArcInfo coverage Geographic GDA94
Available format type:
DIGITAL - ArcGIS-coverage ArcInfo coverage Geographic GDA94
DIGITAL - dat Data file MapInfo Geographic GDA94

Access constraints:

Data is available from Geoscience Australia, subject to standard Geoscience Australia licensing agreement.

Free Data Download

Data quality

Lineage:

Geological layers of the dataset consist of GRANITE and SEDIMENT coverages that represent distribution of the Proterozoic rocks Australia-wide. The original data of the coverages were digitised from published maps at 1:100,000, 1:250,000 and 1:500,000 scale using ArcInfo software. Only polygons representing units of Proterozoic age were selected for the coverages. Map-Symbol fields of the existing maps were used for selecting the polygons.

Point layer contains ROCKCHEM coverage showing locations of geochemical samples of granitic and volcanic rocks used by the project.

Data source: 1:100,000, 1:250,000 and 1:500,000 scale published geological maps, Geoscience Australia OZROX Database, State Survey geochemical databases

Projection information: the original data were captured in UTM Projection, Australian National Spheroid, AGD66 Datum. For the final release all data were converted to Geographic Projection, GRS80 Spheroid, GDA94 Datum using Geoscience Australia data projection files.

Province compilation scale: 1:100.000 scale - Arnhem Land, Broken Hill, Georgetown, King Island and Paterson; 1:250,000 scale - Albany Fraser, Arunta, Curnamona, Gascoyne, Gawler, Kimberley, Leeuwin, McArthur Basin, Musgrave, Pilbara, Pine Creek, Tanami and Tennant Creek; 1:500,000 scale - Mt Isa and Olary

Positional accuracy:

Crosschecking with geological maps shows that 95% of all features could be expected to have accuracy between 50 and 250 metres.

Attribute accuracy:

The accuracy of the attribute information is estimated as high. Classification of the granitoids was performed using data from the selected geochemical samples and outcrop geology in Geoscience Australia. The polygon labels were edited in Arc/Info. The data have been checked visually on plots by the geologist of the project, Geological Surveys of Australian States and Territories, and the sponsoring companies. The additional crosschecking was performed on screen using ArcView.

Logical Consistency:

Data has been checked visually on plots and for topological consistency using in-house routines and Arc/Info GIS software. The check ensures that all the polygons are closed, nodes are formed at the intersection of lines and there is only one label within each polygon.

Completeness:

Data and basic descriptive attributes are complete for the project area.


Contact information

Contact organisation: Commonwealth of Australia (Geoscience Australia) (GA)
Contact position: Manager Client Services
Mail address: Cnr Jerrabomberra Ave and Hindmarsh Dr
Mail address: GPO Box 378
Locality: Canberra
State: ACT
Country: Australia
Postcode: 2601
Telephone: 02 6249 9966
Facsimile: 02 6249 9960
Electronic mail address: sales@ga.gov.au

Metadata information

Metadata date: 2013-03-08


Additional metadata

Metadata reference XHTML: http://www.ga.gov.au/meta/ANZCW0703003638.html

Metadata reference XML: http://www.ga.gov.au/meta/ANZCW0703003638.xml

Geoscience Australia GIS data dictionary can be viewed at http://www.ga.gov.au/general/technotes/20011112_53.jsp. See Geoscience Australia Record (Cat# 33388) for more information on project specific data dictionary.

Authors:Bastrakova, I.V. Budd, A.R. Wyborn, L.A.I.
SPATIAL INFORMATION FOR THE NATION