CEAMARC marine sediment samples

Federal Geographic Data Committee (FGDC) Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: Unknown
Publication_Date: Unknown
Title: CEAMARC marine sediment samples
Description:
Abstract:
Marine sediment samples were obtained from box corer, Smith-MacIntyre and Van Veen grabs. Samples were named by: 1. CEAMARC site (e.g. 16) 2. Instrument (e.g. box corer = BC; Smith-MacIntyre = GRSM; Van Veen = GRVV) 3. Sequence of sample at each site (e.g. first sample = 01; second sample = 02) So 16BC02 is the second sample at CEAMARC site 16, using the box corer. From each successful sample, a sub-sample was obtained: 1. 200 g surface scrape (labelled A) 2. short (20 cm) push core (labelled B) 3. bulk (labelled Bulk) 4. rocks-only (labelled Rocks) e.g. 16BC02A is a 200 g surface scrape subsample from 16BC02. 16BC02B is a push core subsample from 16BC02 16BC02Bulk is a bulk sediment subsample from 16BC02. 16BC02Rocks is a rocks-only subsample from 16BC02. Post-cruise analyses: 1. Grain size 2. Total organic carbon 3. Total organic nitrogen 4. Carbon and nitrogen isotopes 5. Biogenic silica and carbonate 6. Physical properties of cores 7. Zircon dating 8. X-rays for infauna and sedimentary structures Added by Alix Post - March 2010: Seabed samples were collected from 52 sites across the George V Shelf. Most samples were collected with a box corer (BC), though more gravelly sediments required a Smith-McIntyre (GRSM) or Van-Veen grab (GRVV) as indicated by the station name in the spreadsheet. A small volume of sediment was frozen following collection and later analysed for organic carbon and nitrogen content, in addition to carbon and nitrogen isotopes. Organic carbon and nitrogen values are express as percent of the total sediment, and have been corrected back to the total sediment volume. Isotopic values are expressed as values per mil. Where sufficient volume of sediment was collected, a mini-core was pushed into the sediment to provide a depth profile of the sample, and a bulk surface sample was also taken. Surface sediment samples analysed for sieve grainsize, calcium carbonate and biogenic silica content. All values are expressed as percentage values. The naming convention of the samples describes the type of gear used and the nature of the sediment analysed: e.g. 01BC01Bulk is a bulk sediment sample collected with a box core; 38GRVV02B/0-1 is a slice taken from 0 to 1 cm at the top of a van veen grab.
Purpose:
Not Available
Supplemental_Information:
Not Available
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20071223
Ending_Date: 20080117
Currentness_Reference:Unknown
Status:
Progress: Complete
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Description_of_Geographic_Extent:
Bounding_Coordinates:
West_Bounding_Coordinate: 139.333
East_Bounding_Coordinate: 145.333
North_Bounding_Coordinate: -65.812
South_Bounding_Coordinate: -67.051
Keywords:
Theme:
Theme_Keyword_Thesaurus: GCMD SCIENCE PARAMETERS
Theme_Keyword_Thesaurus: GCMD PLATFORM
Theme_Keyword_Thesaurus: GCMD INSTRUMENT
Theme_Keyword_Thesaurus: ANCILLARY KEYWORDS
Theme_Keyword_Thesaurus: ISO TOPIC CATEGORY
Theme_Keyword_Thesaurus: DATA SET LANGUAGE
Theme_Keyword: EARTH SCIENCE > OCEANS > MARINE SEDIMENTS > GEOTECHNICAL PROPERTIES
Theme_Keyword: EARTH SCIENCE > OCEANS > MARINE SEDIMENTS > SEDIMENT COMPOSITION
Theme_Keyword: EARTH SCIENCE > OCEANS > MARINE SEDIMENTS
Theme_Keyword: EARTH SCIENCE > OCEANS > MARINE SEDIMENTS > SEDIMENT CHEMISTRY
Theme_Keyword: EARTH SCIENCE > BIOSPHERE > AQUATIC ECOSYSTEMS > BENTHIC HABITAT
Theme_Keyword: SHIPS
Theme_Keyword: GRAB SAMPLERS
Theme_Keyword: SEDIMENT CORERS
Theme_Keyword: GAS CHROMATOGRAPHS
Theme_Keyword: MASS SPECTROMETERS
Theme_Keyword: Sediment Samples
Theme_Keyword: Surface Sediment
Theme_Keyword: Grainsize
Theme_Keyword: Calcium Carbonate
Theme_Keyword: Biogenic Silica
Theme_Keyword: Grab Sample
Theme_Keyword: Box Core Sample
Theme_Keyword: Box Core
Theme_Keyword: Van Veen Grab
Theme_Keyword: Smith-mcintyre Grab
Theme_Keyword: Sieves
Theme_Keyword: Laser Particle Sizer
Theme_Keyword: Organic Carbon
Theme_Keyword: Nitrogen
Theme_Keyword: Carbon Isotopes
Theme_Keyword: Nitrogen Isotopes
Theme_Keyword: High-temperature Oxidation Column
Theme_Keyword: GEOSCIENTIFIC INFORMATION
Theme_Keyword: OCEANS
Theme_Keyword: ENGLISH
Place:
Place_Keyword_Thesaurus: GCMD
Place_Keyword: OCEAN > SOUTHERN OCEAN
Place_Keyword: GEOGRAPHIC REGION > POLAR
Temporal:
Temporal_Keyword_Thesaurus: GCMD
Temporal_Keyword: 1 Min
Access_Constraints: These data are publicly available for download from the provided URLs. Contact the investigators for permission to use the data. The dataset contains two excel spreadsheets detailing the sediment isotopes and the grainsize compositions, plus a pdf which provides further information about the laser grainsize data. Furthermore a link to Geoscience Australia's Marine Sediments Database is included. Data can also be found here.
Use_Constraints:
This data set conforms to the PICCCBY Attribution License (http://creativecommons.org/licenses/by/3.0/). Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=CEAMARC-200708_V3_MARINE_SEDIMENT_SAMPLES when using these data.
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: PHILIP EDWARD O'BRIEN
Contact_Person_Primary:
Contact_Person: ROBIN JORDAN BEAMAN
Contact_Person_Primary:
Contact_Person: ALIX POST
Contact_Person_Primary:
Contact_Person: JUNHONG CHEN
Contact_Person_Primary:
Contact_Person: CHRISTIAN THUN
Contact_Position: INVESTIGATOR
Contact_Position: TECHNICAL CONTACT
Contact_Position: INVESTIGATOR
Contact_Position: TECHNICAL CONTACT
Contact_Position: INVESTIGATOR
Contact_Position: TECHNICAL CONTACT
Contact_Position: TECHNICAL CONTACT
Contact_Position: TECHNICAL CONTACT
Contact_Address:
Address_Type: Mailing and Physical Address
Contact_Address:
Address_Type: Mailing and Physical Address
Address: James Cook University PO Box 6811
City: Cairns
State_or_Province: QLD
Postal_Code: 4870
Country: Australia
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Geoscience Australia
Address: Corner of Jerrabomberra Av. and Hindmarsh Drv.,
Address: GPO Box 378
City: Symonston
State_or_Province: Australian Capital Territory
Postal_Code: 2609
Country: Australia
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Geoscience Australia
Address: Corner of Jerrabomberra Av. and Hindmarsh Drv.,
Address: GPO Box 378
City: Symonston
State_or_Province: Australian Capital Territory
Postal_Code: 2609
Country: Australia
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Geoscience Australia
Address: Corner of Jerrabomberra Av. and Hindmarsh Drv.,
Address: GPO Box 378
City: Symonston
State_or_Province: Australian Capital Territory
Postal_Code: 2609
Country: Australia
Contact_Voice_Telephone: +61 7 4042 1693
Contact_Voice_Telephone: +61 2 6249 9023
Contact_Voice_Telephone: +61 2 6249 9202
Contact_Voice_Telephone: +61 2 6249 9557
Contact_Facsimile_Telephone: +61 7 4042 1284
Contact_Electronic_Mail_Address: phil.obrien.ant@gmail.com
Contact_Electronic_Mail_Address: robin.beaman@jcu.edu.au
Contact_Electronic_Mail_Address: alix.post@ga.gov.au
Contact_Electronic_Mail_Address: junhong.chen@ga.gov.au
Contact_Electronic_Mail_Address: christian.thun@ga.gov.au
Back to Top
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
Data quality is good for all sediment records. Tin-wrapped samples are loaded into carousels with 49 samples in each tray and 3 trays making up a full run of 147 samples. The carousels are placed on an AS200 autosampler that drops a sample in response to a pulse of compressed air. Gases are swept through the columns and GC by an approximately 100 ml min-1 flow of high purity helium. The sample dropper uses a sliding port that maintains the approximately 1 atmosphere pressure of the helium required to force the gases through the columns and GC. The autosampler sits on top of a Carlo Erba CE1110 CHN-S analyser containing the two furnaces, the scrubber and the GC (Gas Chromatograph). After the GC in the gas stream sits a TCD (Thermal Conductivity Detector) which is used to measure peak area when the machine is used as an elemental analyser. The samples are dropped into the left-hand furnace which is the oxidising furnace and is maintained at 1050 degrees C. It consists of a silica glass tube filled with chromium oxide to the midpoint, with cobaltous silver oxide under it. A tube takes the carrier gas from the bottom of this reactor to the second, reducing furnace tube which the mixed gases flow up through. The second silica glass tube is filled with metallic copper pellets and is kept at 660 degrees C. The gases flow out of the top of this tube and through a scrubber filled with magnesium perchlorate to absorb all water vapour. The dried gases then pass through a packed GC consisting of a 1/4" stainless steel tube with Porapak QS 50-80 mesh. This is held at about 25 degrees C. Nitrogen gas exits from the GC, followed by carbon dioxide after about one minute. These flow to an open split where they are sucked into the mass spectrometer through a 75 micro silica capillary. The gas pulses, still mixed with the helium carrier, flow into the Fisons Isochrom CF-IRMS (Continuous-flow Isotope Ratio Mass Spectrometer) where their isotopic compositions are determined. Surface sediment samples were analysed to determine the gravel, sand and mud content by washing through 2 mm and 63 micron sieves. The less than 2 mm fraction was also analysed for laser particle size. Carbonate content was determined on the bulk material as well as the mud and sand fractions using the carbonate bomb method (Muller and Gastner, 1971). The carbonate content of the gravel fraction was determined by visual analysis. The biogenic silica content of the bulk sediment was measured based on the method of Mortlock and Froelich (1989). Muller, G., Gastner, M., 1971. The "Karbonat-Bombe," a simple device for the determination of the carbonate content in sediments, soils and other materials. Neues Jahrbuch fur Mineralogie, Monatshefte 10, 466-469. Mortlock, R.A., Froelich, P.N., 1989. A simple method for the rapid determination of biogenic opal in pelagic marine sediments. Deep Sea Research 36, 1415-1426.
Logical_Consistency_Report:
Not Available
Completeness_Report:
Not Available
Lineage:
Process_Step:
Process_Description:
Not Available
Process_Date: Unknown
Back to Top
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Geographic:
Latitude_Resolution: 0.0001 degree or 11.1 metres
Longitude_Resolution: 0.0001 degree or 11.1 metres
Geographic_Coordinate_Units: Decimal degrees
Vertical_Coordinate_System_Definition:
Altitude_System_Definition:
Altitude_Datum_Name: Not Available
Altitude_Resolution: 5 metres
Altitude_Distance_Units: Not Available
Altitude_Encoding_Method: Implicit coordinate
Depth_System_Definition:
Depth_Datum_Name: Not Available
Depth_Resolution: 5 metres
Depth_Distance_Units: Not Available
Depth_Encoding_Method: Implicit coordinate
Back to Top
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: AU/AADC > Australian Antarctic Data Centre, Australia
Contact_Person: DATA OFFICER AADC
Contact_Position: DATA CENTER CONTACT
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Australian Antarctic Division
Address: 203 Channel Highway
City: Kingston
State_or_Province: Tasmania
Postal_Code: 7050
Country: Australia
Contact_Voice_Telephone: +61 3 6232 3244
Contact_Facsimile_Telephone: +61 3 6232 3351
Contact_Electronic_Mail_Address: metadata@aad.gov.au
Resource_Description: CEAMARC-200708_V3_MARINE_SEDIMENT_SAMPLES
Distribution_Liability:
Not Available
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: excel, pdf
Transfer_Size: 677 kb
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://data.aad.gov.au
Access_Instructions:
DATA CENTER URL
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://data.aad.gov.au/aadc/portal/download_file.c...
Access_Instructions:
Download point for the data at the Australian Antarctic Data Centre
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://www.ga.gov.au/oracle/mars
Access_Instructions:
Access point for Geoscience Australia's Marine Sediments Database
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
https://secure3.aad.gov.au/proms/public/projects/r...
Access_Instructions:
Public information for ASAC project 2201
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://data.aad.gov.au/aadc/metadata/citation.cfm?...
Access_Instructions:
Citation reference for this metadata record and dataset.
Fees: Free
Back to Top
Metadata_Reference_Information:
Metadata_Date: 20080224
Metadata_Review_Date: 20140110
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: DAVE J. CONNELL
Contact_Position: DIF AUTHOR
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Australian Antarctic Division
Address: 203 Channel Highway
City: Kingston
State_or_Province: Tasmania
Postal_Code: 7050
Country: Australia
Contact_Voice_Telephone: +61 3 6232 3244
Contact_Facsimile_Telephone: +61 3 6232 3351
Contact_Electronic_Mail_Address: dave.connell@aad.gov.au
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
Back to Top
[ Update this Record ]


Link to Web Site