Product catalogue
Seafloor environments of the northern Lord Howe Rise, Eastern Australia: Mineralogy of seabed sediments.
Geoscience Australia marine reconnaissance survey TAN0713 to the Lord Howe Rise offshore eastern Australia was completed as part of the Federal Government's Offshore Energy Security Program between 7 October and 22 November 2007 using the New Zealand Government's research vessel Tangaroa. The survey was designed to sample key, deep-sea environments on the east Australian margin (a relatively poorly-studied shelf region in terms of sedimentology and benthic habitats) to better define the Capel and Faust basins, which are two major sedimentary basins beneath the Lord Howe Rise. Samples recovered on the survey contribute to a better understanding of the geology of the basins and assist with an appraisal of their petroleum potential. They also add to the inventory of baseline data on deep-sea sediments in Australia. The principal scientific objectives of the survey were to: (1) characterise the physical properties of the seabed associated with the Capel and Faust basins and Gifford Guyot; (2) investigate the geological history of the Capel and Faust basins from a geophysical and geological perspective; and (3) characterise the abiotic and biotic relationships on an offshore submerged plateau, a seamount, and locations where fluid escape features were evident. This dataset comprises mineraology data (e.g. concentrations of bulk carbonate, calcite, aragonite, halite, quartz) from seanbed sediments (0-2cm).
Some relevant publications which pertain to these datasets include:
1. Heap, A.D., Hughes, M., Anderson, T., Nichol, S., Hashimoto, T., Daniell, J., Przeslawski, R., Payne, D., Radke, L., and Shipboard Party, (2009). Seabed Environments and Subsurface Geology of the Capel and Faust basins and Gifford Guyot, Eastern Australia - post survey report. Geoscience Australia, Record 2009/22, 166pp.
2. Radke, L.C. Heap, A.D., Douglas, G., Nichol, S., Trafford, J., Li, J., and Przeslawski, R. 2011. A geochemical characterization of deep-sea floor sediments of the northern Lord Howe Rise. Deep Sea Research II 58: 909-921
Simple
Identification info
- Date (Publication)
- 2014-01-01T00:00:00
- Citation identifier
- Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/82533
- Citation identifier
- Digital Object Identifier/http://dx.doi.org/10.4225/25/54B865F9E9250
- Cited responsible party
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Role Organisation / Individual Name Details Publisher Geoscience Australia
Canberra Author Radke, L.C.
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- Point of contact
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Role Organisation / Individual Name Details Custodian EGD
Owner Commonwealth of Australia (Geoscience Australia)
Custodian Commonwealth of Australia (Geoscience Australia)
Voice
- Topic category
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- Oceans
Extent
))
- Maintenance and update frequency
- As needed
- Keywords
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Marine Data
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- Theme
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marine survey
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- Theme
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marine park
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- Theme
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Continental Shelf
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- Theme
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seabed
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- Theme
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geochemistry
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- Theme
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marine
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- Keywords
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AU-QLD
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- Australian and New Zealand Standard Research Classification (ANZSRC)
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Marine Geoscience
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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
- 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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File download
Download the data (xlsx)
- Distribution format
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xlsx
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Resource lineage
- Statement
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Sediment samples for chemical analysis were collected into 58 ml centrifuge tubes that had been pre-washed in 10% nitric acid and rinsed in distilled water. The porewaters were removed from these samples by centrifugation (8000 rpm; 5 minutes) immediately after collection. The residual solid-phase was then frozen, freeze-dried and homogenised prior to undergoing the analyses listed below. Ground sample powders were submitted for quantitative phase analysis using X ray diffraction (XRD) at Sietronics Pty Ltd (Canberra). The samples were prepared as unoriented powder mounts. The XRD patterns were generated using a Bruker-AXS D4 XRD with Cu radiation at 40 kV and 30 mA, over a range of 1.3 to 70o2, with a 0.02 degree step and a 2 sec per step count time. A graphite monochromator was used in the diffracted beam. A mineral search/match analysis was carried out with the aid of the Bruker Diffracplus Search/Match software and the ICDD PDF-2 database. The quantitative phase analysis was performed using the Siroquant V3 software. Carbonate contents were determined on bulk sediments using the carbonate bomb method (Müller and Gastner 1971). A 20% orthophosphoric acid solution was warmed to 50oC and placed in a warm (35oC) Perspex container. Dried and crushed sediment samples weighing 0.9 g were introduced to the chambers. Pressure gauges were screwed onto the top of the chambers to form a seal. The chambers were then agitated until all carbonate dissolved to produce CO2 gas. The mass of carbonate was determined by a calibration curve of the CO2 gas pressure as a function of carbonate content. The accuracy of the method was ± 0.5%.
Thanks to the crew of the RV Solander for help with sample collection.
- Hierarchy level
- Dataset
- 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/08e10292-83e6-2c3a-e054-00144fdd4fa6
- 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
- Dataset
- Name
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dataset
Alternative metadata reference
- Title
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Geoscience Australia - short identifier for metadata record with
uuid
- Citation identifier
- eCatId/82533
- Date info (Revision)
- 2018-04-22T08:21:23
- Date info (Creation)
- 2014-11-28T00:00:00
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