Event-based Chronostratigraphy and Mineralisation: southern McArthur and Mt Isa regions and comparisons with Central Australia  


Authors / CoAuthors

Southgate, P.N. | Neumann, N.L. | Polito, P.A.

Abstract

Presented at the Evolution and metallogenesis of the North Australian Craton Conference, 20-22 June 2006, Alice Springs. The Mt Isa Inlier and southern McArthur basin are, arguably, the most extensively studied and best understood Palaeo- to Mesoproterozoic terranes in Australia, and possibly the world. These rocks host one of the world's largest base metal repositories. The McArthur - Mt Isa - Cloncurry mineral belt contains several world class Zn-Pb-Ag, Cu, and Cu-Au deposits as well as hosting significant uranium resources. Since 1995, Geoscience Australia, in combination with the Geological Surveys of Queensland and the Northern Territory, has implemented a series of integrated, multidisciplinary projects in the Mt Isa and southern McArthur regions with the aim of generating a chronostratigraphic understanding of basin evolution. The integration of detrital and magmatic U-Pb zircon SHIRMP geochronology with depositional facies and sequence stratigraphic analysis has allowed the development of a chronostratigraphic framework for the Leichhardt (~1800-1745 Ma), Calvert (~1730-1690 Ma) and Isa (~1670-1575 Ma) Superbasins of the Mt Isa and southern McArthur regions. The new event chart recognises three supersequences in the Leichhardt Superbasin, two supersequences in the Calvert Superbasin, and seven supersequences in the Isa Superbasin. Each of the supersequences is unconformity-bounded. In the Mt Isa region, times of increased magmatic activity broadly coincided with intervals of incision and gaps in the sedimentary rock record. <p>Related product:<a href="https://www.ga.gov.au/products/servlet/controller?event=GEOCAT_DETAILS&amp;catno=64764">Evolution and metallogenesis of the North Australian Craton Conference Abstracts</p>

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nonGeographicDataset

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64756

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MNHD  

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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

Keywords

  • PowerPoint
( Theme )
  • economic geology
( Theme )
  • geology
( Theme )
  • metallogenesis
  • AU-NTAU-QLD
Australian and New Zealand Standard Research Classification (ANZSRC)
  • Earth Sciences
  • Published_Internal

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2006-01-01T00:00:00

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geoscientificInformation

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[-22.0, -13.0, 130.0, 142.0]

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