Abstract

Intrusion Related Gold Deposits (IRGD) represents a new class of mineral deposit, although still regarded as controversial (Sillitoe, 1991; Thompson et al., 1999). The consistent association of IRGDs with certain magma types, their consistent polymetallic metal associations (Au, Bi, W, As, Mo, Te and/or Sb; Lang et al., 2000), metal zonation patterns, and the presence of Au in high temperature melt inclusions associated with intrusion proximal examples indicate that a magmatic origin for IRGD can be regarded with confidence (Mustard et al., 2004). The importance of the geochemical inheritance of anomalous Au in felsic magmas (eg. Tomkins and Mavrogenes, 2003) is unclear but is probably not required, and does not explain the consistent associations between IRGD and certain granite types. Gold must be preserved in the melt fraction of crystallizing plutons and be available to the fluid phase during exsolution. Low S magmas of intermediate to felsic compositions with intermediate oxidation states favour neither early sulfide or magnetite precipitation, or early SO2 formation. The absence of these conditions should be conducive to the preservation of Au in the melt fraction of granite magmas (Blevin, 2004). Related information <a href="https://www.ga.gov.au/products/servlet/controller?event=GEOCAT_DETAILS&amp;catno=36591">AGSO Journal vol.17 no. 4 - mineral deposits</a><br /> <br />
Google map showing geographic bounding box with values North bound -10.0 East bound 155.0 West bound 140.0 South bound -44.0
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Product Type/Sub Type

nonGeographicDataset

Constraints

Creative Commons Attribution 4.0 International Licence

IP Owner

Commonwealth of Australia (Geoscience Australia)

Author(s)

Date (publication)

2005-01-01T00:00:00

Product Type

nonGeographicDataset

Topic Category

geoscientificInformation

GA Catalogue Number

63681 Product http://www.ga.gov.au/metadata-gateway/metadata/record/63681/

Keywords

GA Publication
Other Publication
economic geology
geochemistry
mineral deposits
mineral exploration
resource assessment
AU-QLD
Earth Sciences

Resource Language

English

Resource Character Set

utf8

Resource Security Classification

unclassified

Geographic Extent

North bound
-10.0
East bound
155.0
West bound
140.0
South bound
-44.0

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

a05f7892-ca97-7506-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
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