Intrusion Related Gold Deposits  


Authors / CoAuthors

Blevin, P.L.

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 />

Product Type

document

eCat Id

63681

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  Owner

Commonwealth of Australia (Geoscience Australia)  

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Commonwealth of Australia (Geoscience Australia)  
Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
ACT
2601
Australia

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Keywords

  • GA PublicationOther Publication
( Theme )
  • economic geology
( Theme )
  • geochemistry
( Theme )
  • mineral deposits
( Theme )
  • mineral exploration
( Theme )
  • resource assessment
  • AU-QLD
Australian and New Zealand Standard Research Classification (ANZSRC)
  • Earth Sciences
  • Published_External

Publication Date

2005-01-01T00:00:00

Creation Date

Security Constraints

Australian Government Security ClassificationSystem    

Classification - unclassified

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Creative Commons Attribution 4.0 International Licence    

Access - license

Use - license

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Purpose

Maintenance Information

unknown

Topic Category

geoscientificInformation

Series Information

Lineage

Unknown

Parent Information

Extents

[-44.0, -10.0, 140.0, 155.0]

Reference System

Spatial Resolution

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