• 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
Role Organisation / Individual Name Details
Publisher

Geoscience Australia

Canberra
Author

Radke, L.C.

1
Point of contact
Role Organisation / Individual Name Details
Custodian

EGD

Owner

Commonwealth of Australia (Geoscience Australia)

Custodian

Commonwealth of Australia (Geoscience Australia)

Voice
Topic category
  • Oceans

Extent

N
S
E
W


Maintenance and update frequency
As needed
Keywords
  • Marine Data

Theme
  • marine survey

Theme
  • marine park

Theme
  • Continental Shelf

Theme
  • seabed

Theme
  • geochemistry

Theme
  • marine

Keywords
  • AU-QLD

Australian and New Zealand Standard Research Classification (ANZSRC)
  • Marine Geoscience

Keywords
  • Published_External

Resource constraints

Title

Creative Commons Attribution 4.0 International Licence

Alternate title

CC-BY

Edition

4.0

Website

http://creativecommons.org/licenses/

Access constraints
License
Use constraints
License

Resource constraints

Title

Australian Government Security ClassificationSystem

Edition date
2018-11-01T00:00:00
Website

https://www.protectivesecurity.gov.au/Pages/default.aspx

Classification
Unclassified
Language
English
Character encoding
UTF8

Distribution Information

Distributor contact
Role Organisation / Individual Name Details
Distributor

Commonwealth of Australia (Geoscience Australia)

Voice
OnLine resource

File download

Download the data (xlsx)

Distribution format
  • xlsx

Resource lineage

Statement

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

Source data not available.

Metadata constraints

Title

Australian Government Security ClassificationSystem

Edition date
2018-11-01T00:00:00
Website

https://www.protectivesecurity.gov.au/Pages/default.aspx

Classification
Unclassified

Metadata

Metadata identifier
urn:uuid/08e10292-83e6-2c3a-e054-00144fdd4fa6

Title

GeoNetwork UUID

Language
English
Character encoding
UTF8
Contact
Role Organisation / Individual Name Details
Point of contact

Commonwealth of Australia (Geoscience Australia)

Voice

Type of resource

Resource scope
Dataset
Name

dataset

Alternative metadata reference

Title

Geoscience Australia - short identifier for metadata record with

uuid

Citation identifier
eCatId/82533

Metadata linkage

https://ecat.ga.gov.au/geonetwork/srv/eng/catalog.search#/metadata/08e10292-83e6-2c3a-e054-00144fdd4fa6

Date info (Revision)
2018-04-22T08:21:23
Date info (Creation)
2014-11-28T00:00:00

Metadata standard

Title

AU/NZS ISO 19115-1:2014

Metadata standard

Title

ISO 19115-1:2014

Metadata standard

Title

ISO 19115-3

Title

Geoscience Australia Community Metadata Profile of ISO 19115-1:2014

Edition

Version 2.0, September 2018

Citation identifier
https://pid.geoscience.gov.au/dataset/ga/122551

 
 

Spatial extent

N
S
E
W


Keywords

Continental Shelf geochemistry marine marine park marine survey seabed

Provided by

Access to the portal
Read here the full details and access to the data.

Associated resources

Not available


  •  
  •  
  •