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X-ray diffraction data for surface seabed sediments in Jervis Bay, NSW (June 2008)Note: This metadata describes the dataset in accordance with the ANZLIC (Australia New Zealand Land Information Council) Core Metadata Guidelines Version 2. Dataset citationANZLIC unique identifier: ANZCW0703016220 Title: X-ray diffraction data for surface seabed sediments in Jervis Bay, NSW (June 2008) CustodianCustodian: Geoscience Australia Jurisdiction: Australia DescriptionAbstract: Geoscience Australia carried out marine surveys in Jervis Bay (NSW) in 2007, 2008 and 2009 (GA303, GA305, GA309, GA312) to map seabed bathymetry and characterise benthic environments through co-located sampling of surface sediments (for textural and biogeochemical analysis) and infauna, observation of benthic habitats using underwater towed video and stills photography, and measurement of ocean tides and wave-generated currents. Data and samples were acquired using the Defence Science and Technology Organisation (DSTO) Research Vessel Kimbla. Bathymetric mapping, sampling and tide/wave measurement were concentrated in a 3x5 km survey grid (named Darling Road Grid, DRG) within the southern part of the Jervis Bay, incorporating the bay entrance. Additional sampling and stills photography plus bathymetric mapping along transits was undertaken at representative habitat types outside the DRG. This 42 sample data set comprises the mineraology of surface seabed sediment (~0-2 cm) in Jervis Bay. ANZLIC search words:
Spatial domain:
Geographic extent name: AUSTRALIA EXCLUDING EXTERNAL TERRITORIES - AUS - Australia - Australia Geographic extent polygon: 150.6883 -35, 150.78 -35, 150.78 -35.13, 150.6883 -35.13, 150.6883 -35, Note: The format for each Geographic extent name is: Name - Identifier - Category - Jurisdiction (as appropriate) See GEN Register
Data currencyBeginning date: 2008-06-23 Ending date: 2008-06-27 Dataset statusProgress: Complete Maintenance and update frequency: Not Known Access
Access constraints: This material is released under the Creative Commons Attribution 3.0 Australia Licence. Free Data DownloadData qualityLineage: Bottom sediments were collected using a small Shipek type grab sampler.This device can collect an intact sample of sediment up to 5 cm by 12 cm in area and 5 cm thick. Upon triggering, the grab immediately covers the sample, which prevents wash-out of fine sediment during retrieval to the surface. The surface sediments (~0-2 cm) within the grab were spooned into falcon vials and the porewaters were removed by centrifugation (9000 rpm; 5 minutes). The samples were then frozen for transport to the laboratory at Geoscience Australia where they were freeze-dried and ground. Mineralogy was was determined on the powders using a a Siemems D500/D501 series X-ray diffractometer. Mineral identification software was used to identify the d-spacing of the peaks, and Siroquant was used to derive a semi-quantitative estimate of mineral abundance. Positional accuracy: A C-NAV system was used to provide geographical position with a manufacturer accuracy of 10 cm RMS. However, the instruments may have been dragged by currents such that the readings may deviate from the GIS position. Attribute accuracy: Moderate Logical Consistency: consistent Completeness: completed Contact information
Metadata informationMetadata date: 2013-03-08 Additional metadataMetadata reference XHTML: http://www.ga.gov.au/meta/ANZCW0703016220.html Metadata reference XML: http://www.ga.gov.au/meta/ANZCW0703016220.xml . Authors:Hughes, M. |
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