Product catalogue
Geochemistry of organic rich shales in the Roper and Isa Superbasins of Northern Australia
The Proterozoic was an important eon which saw profound changes in the geochemistry of the oceans and the first appearance and proliferation of complex life [1]. In this study we examine the relationships between organic matter and ocean geochemistry in sedimentary sequences in Northern Australia.
The geobiology of the McArthur Basin has been comprehensively studied and characterised. The ca. 1.3 Ga Velkerri Formation within the Roper Superbasin is predominantly ferruginous with episodes of euxinia coupled to enhanced primary productivity [2]. In contrast, black carbonaceous shales of the ca. 1.6 Ga Fraynes and Barney Creek Formations are pervasively anoxic and euxinic [3]. The latter formation is dominated by aromatic isoprenoids, biomarkers for green and purple sulfur bacteria commonly associated with photic zone euxinia [4]. In contrast, little attention has been given to the likely coeval South Nicholson Basin and Lawn Hill Platform located directly south of the McArthur Basin, straddling the Queensland and Northern Territory border.
Here we provide new insights into the paleo-environments of Paleoproterozoic and Mesoproterozoic sedimentary successions in the Lawn Hill Platform and South Nicholson Basin based on multi-proxy sedimentary geochemical analyses including biomarkers, isotopes (?13C, ?15N and ?34S) and trace metals. The results in this study while preliminary at present, demonstrate redox heterogeneity with oscillations between ferruginous and euxinic conditions broadly correlating with increases in total organic carbon content. Complexities in the data remain including potential influences of hydrothermal alteration on the thermal evolution, and mobility and abundances of trace metals in some sections of the basins.
Abstract submitted to/presented at the 2018 Australian Geoscience Council Convention (AGCC)
Simple
Identification info
- Date (Creation)
- 2018-06-13
- Date (Publication)
- 2024-09-23T21:24:43
- Citation identifier
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Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/121348
- Cited responsible party
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Role Organisation / Individual Name Details Publisher Commonwealth of Australia (Geoscience Australia)
Voice Author Jarrett, A.
External Contact Author Cox, G.M.
External Contact Author Brocks, J.J.
External Contact Author Shannon, A.V.
External Contact Author Johnson, B.
External Contact Author McLennan, S.
Place and Communities Internal Contact Author Thorne, J.
MEG Internal Contact Author Vinnichenko, G.
External Contact Author Huston, D.
MEG Internal Contact Author Champion, D.
MEG Internal Contact Author Henson, P.
MEG Internal Contact
- Name
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Australian Geoscience Council Convention (AGCC) 14-18 October 2018, Adelaide, SA
- Purpose
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AGCC Abstract
- Status
- Completed
- Point of contact
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Role Organisation / Individual Name Details Point of contact Commonwealth of Australia (Geoscience Australia)
Voice Resource provider Minerals, Energy and Groundwater Division
External Contact Point of contact Carr, L.
MEG Internal Contact
- Spatial representation type
- Topic category
-
- Geoscientific information
Extent
Extent
))
- Maintenance and update frequency
- As needed
Resource format
- Title
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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
- theme.ANZRC Fields of Research.rdf
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EARTH SCIENCES
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- Keywords
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Isa superbasin
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- Keywords
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Roper superbasin
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- Keywords
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proterozoic
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- Keywords
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paleo-environments
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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
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4.0
- Access constraints
- License
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© Commonwealth of Australia (Geoscience Australia) 2018
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 facsimile
- OnLine resource
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Link to Conference Page
Link to Conference Page
- Distribution format
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- OnLine resource
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Link to Abstract (p396)
Link to Abstract (p396)
- Distribution format
-
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Resource lineage
- Statement
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AGCC Abstract
- Hierarchy level
- Document
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/73ac2398-a66e-4f0c-80ac-fc262ff48e58
- 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 Point of contact Carr, L.
MEG Internal Contact
Type of resource
- Resource scope
- Document
- Name
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Conference Abstract
Alternative metadata reference
- Title
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Geoscience Australia - short identifier for metadata record with
uuid
- Citation identifier
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eCatId/121348
- Metadata linkage
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https://ecat.ga.gov.au/geonetwork/srv/eng/catalog.search#/metadata/73ac2398-a66e-4f0c-80ac-fc262ff48e58
- Date info (Creation)
- 2018-05-04T03:37:56
- Date info (Revision)
- 2018-06-13T04:22:37
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
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https://pid.geoscience.gov.au/dataset/ga/122551