Product catalogue
Tectonic evolution and crustal setting of the middle Proterozoic Leichhardt River fault trough, Mount Isa region, northwestern Queensland
The tectonic evolution of the fault-bounded volcanic-sedimentary Leichhardt River fault trough is reinterpreted in the light of detailed mapping of a part of this structure. Two major unconformities are indicated, the first above the Kalkadoon-Leichhardt acid igneous complex, and the second at the base of the ore-bearing Mount Isa Group and its equivalents - the Mingera and Surprise Creek Beds. A complex succession of movements is indicated, involving (1) early faulting of the Kalkadoon-Leichhardt acid igneous complex; (2) long-acting penecontemporaneous faulting; (3) folding and uplift accompanying or post-dating emplacement of Sybella Granite, and (4) a younger major faulting phase. During phase (2) syndepositional block movements resulted in differential accumulation of volcanic flows and of sediments, reflected by abrupt thickness changes across faults. In other instances the observed thickness variations can be explained by strike faulting of lenticular sedimentary units. Basic dyke swarms which intrude the volcanic- sedimentary sequence of the Leichhardt River fault trough have postdated the folding and predated the major faulting event defined as phase (4). The Sybella Granite, thought by some workers to be younger than the Mount Isa Group on the basis of structure and lead isotope ratios, is considered by us to be older than this unit. The ore lead in the Mount Isa deposit could be related to erosion or leaching of lead from older rocks such as the Kalkadoon-Leichhardt basement complex and the Eastern Creek Volcanics. An age of between I500-1600 m.y. is indicated for the syngenetic lead deposit at Mount Isa. The Eastern Creek Volcanics show very high Pb relative to average basalt, and high Cu, Zn and Pb levels relative to other basic volcanic rocks in this region, and may have a genetic relation to the Mount Isa Cu and Ag-Pb-Zn ore deposits. Geochemical features of basalts of the Eastern Creek Volcanics are consistent with those of continental flood tholeiites, showing high FeO, FeO/ MgO ratios, TiO2, K2O, P2O5, Ba and Rb and low Al2O3. Structural, sedimentological and geochemical changes between the Mount Isa area and the CIoncurry area to the east - where ocean floor type tholeiites occur - can be interpreted in terms of a transition into a continental margin environment in this direction.
Simple
Identification info
- Date (Publication)
- 1976-01-01T00:00:00
- Citation identifier
- Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/80873
- Cited responsible party
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Role Organisation / Individual Name Details Publisher Bureau of Mineral Resources, Geology and Geophysics
Canberra Author Glikson, A.Y.
1 Author Derrick, G.M.
2 Author Wilson, I.H.
3 Author Hill, R.M.
4
- Name
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BMR Journal of Australian Geology and Geophysics
- Issue identification
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1:2:115-129
- Point of contact
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Role Organisation / Individual Name Details Custodian Corp
Owner Commonwealth of Australia (Geoscience Australia)
Custodian Commonwealth of Australia (Geoscience Australia)
Voice
- Topic category
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- Geoscientific information
Extent
))
- Maintenance and update frequency
- Unknown
Resource format
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Product data repository: Various Formats
- Website
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Data Store directory containing the digital product files
Data Store directory containing one or more files, possibly in a variety of formats, accessible to Geoscience Australia staff only for internal purposes
- Keywords
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GA Publication
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Journal
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- Keywords
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QLD
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- Australian and New Zealand Standard Research Classification (ANZSRC)
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Earth Sciences
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- Keywords
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Published_External
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Resource constraints
- Title
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Creative Commons Attribution 4.0 International Licence
- Alternate title
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CC-BY
- Edition
-
4.0
- Access constraints
- License
- Use constraints
- License
Resource constraints
- Title
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Australian Government Security ClassificationSystem
- Edition date
- 2018-11-01T00:00:00
- Classification
- Unclassified
- Language
- English
- Character encoding
- UTF8
Distribution Information
- Distributor contact
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Role Organisation / Individual Name Details Distributor Commonwealth of Australia (Geoscience Australia)
Voice
- OnLine resource
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Journal article (pdf)
Journal article (pdf)
- Distribution format
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pdf
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Resource lineage
- Statement
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Unknown
- Hierarchy level
- Non geographic dataset
- Other
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GA Publication
- Description
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Source data not available.
Metadata constraints
- Title
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Australian Government Security ClassificationSystem
- Edition date
- 2018-11-01T00:00:00
- Classification
- Unclassified
Metadata
- Metadata identifier
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urn:uuid/fae9173a-6f46-71e4-e044-00144fdd4fa6
- Title
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GeoNetwork UUID
- Language
- English
- Character encoding
- UTF8
- Contact
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Role Organisation / Individual Name Details Point of contact Commonwealth of Australia (Geoscience Australia)
Voice
Type of resource
- Resource scope
- Document
- Name
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AGSO BMR Journal
Alternative metadata reference
- Title
-
Geoscience Australia - short identifier for metadata record with
uuid
- Citation identifier
- eCatId/80873
- Date info (Revision)
- 2018-04-20T06:08:44
- Date info (Creation)
- 2014-06-03T00:00:00
Metadata standard
- Title
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AU/NZS ISO 19115-1:2014
Metadata standard
- Title
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ISO 19115-1:2014
Metadata standard
- Title
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ISO 19115-3
- Title
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Geoscience Australia Community Metadata Profile of ISO 19115-1:2014
- Edition
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Version 2.0, September 2018
- Citation identifier
- https://pid.geoscience.gov.au/dataset/ga/122551