Rock Magnetic Data from West Antarctic Clasts

Federal Geographic Data Committee (FGDC) Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: Anne Grunow
Publication_Date: June 2004
Title: Rock Magnetic Data from West Antarctic Clasts
Edition:
Geospatial_Data_Presentation_Form: Excel spreadsheet or website by sample
Series_Information:
Series_Name:
Issue_Identification:
Publication_Information:
Publication_Place: Online WWW
Publisher:
Other_Citation_Details:
Online_Linkage: http://bprc.osu.edu/
Description:
Abstract:
The goal of this collaborative pilot project was to obtain the first petrological, geochemical, magnetic characterization of subglacial and basal sediments recovered from boreholes drilled to the base of the West Antarctic Ice Sheet (WAIS). Over the last two decades, samples of subglacial sediment (till) and basal debris were obtained from several locations across the WAIS (see map of locations, Vogel, 2004). Properties of the subglacial till layer were the specific target of hot water drilling at several Whillans, Kamb and Bindschadler Ice Stream (WIS, KIS and BIS) locations. At each site (UpB, newUpB, UpC, UpD, Siple Dome) piston cores up to 3 m long were recovered. Small amounts of subglacial till were recovered when drilling through Crary Ice Rise (CIR). Debris in basal ice (henceforth basal ice debris) was present in ice cores from Byrd Station, Unicorn, Siple Dome (H. Engelhardt and T. Gow personal communication) and the UpC Sticky Spot. The goal of the magnetics part of our pilot project was to provide rock magnetic data that could help identify the provenance of bedrock clasts found in the ice cores. Of particular interest was the identification of basaltic clasts that could be from the Cenozoic volcanoes beneath the WAIS. Grunow measured the intensity and susceptibility on more than 550 clasts found at the base of ice-cores in West Antarctica (see attached figure of magnetic data from granitic clasts). The work included rock density measurements necessary for volume correction of the magnetic data. Susceptiblity was measured on a KLY-3 kappabridge and intensity on a JR5A magnetometer for 550 clasts. Due to the irregular size of the pebbles,all of the data have been normalized to 1 cubic centimeter so that comparisons can be made with existing rock magnetic data found in the Antarctic Rock Magnetic Property database on the web.
Purpose:
Not Available
Supplemental_Information:
REFERENCE: S. W. Vogel, Tulaczyk, S., Grunow, "Provenance of West-Antarctic subglacial sediment" , bibl. SEAP workshop, Boulder, CO, (2003). Abstract Published Vogel, S and Grunow, A.M., "Magnetic properties of subglacial sediment from West-Antarctic Ice Streams" , bibl. West Antarctic Ice Sheet meeting, Algonkian Park, Sterling, New York, Sept 29-Oct 2, 2004, (2004). Abstract Submitted Vogel, S.W., "The basal regime of the West Antarctic Ice Sheet - interaction of subglacial geology with ice dynamics" , bibl. Ph.D thesis, Earth Science, University of California, Santa Cruz, (2004). Thesis Published Vogel, S. W., S. Tulaczyk, S. P. Carter, P. Renne and B. Turrin, "Geologic constraints on subglacial volcanism in West-Antarctica", Nature, vol. , (), p. . Submitted
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 19680101
Ending_Date: 20001231
Currentness_Reference:Unknown
Status:
Progress: Complete
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Description_of_Geographic_Extent:
Bounding_Coordinates:
West_Bounding_Coordinate: -170.0
East_Bounding_Coordinate: -110.0
North_Bounding_Coordinate: -79.0
South_Bounding_Coordinate: -84.0
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 > PALEOCLIMATE > LAND RECORDS > GLACIATION
Theme_Keyword: EARTH SCIENCE > SOLID EARTH > GEOMAGNETISM > MAGNETIC FIELD > MAGNETIC INTENSITY
Theme_Keyword: EARTH SCIENCE > SOLID EARTH > GEOMAGNETISM
Theme_Keyword: EARTH SCIENCE > SOLID EARTH > ROCKS/MINERALS/CRYSTALS > BEDROCK LITHOLOGY
Theme_Keyword: EARTH SCIENCE > SOLID EARTH > ROCKS/MINERALS/CRYSTALS > SEDIMENTARY ROCKS
Theme_Keyword: EARTH SCIENCE > PALEOCLIMATE > LAND RECORDS > BOREHOLES
Theme_Keyword: FIELD INVESTIGATION
Theme_Keyword: MAGNETOMETERS
Theme_Keyword: Rock Magnetics
Theme_Keyword: West Anarctic
Theme_Keyword: Clasts
Theme_Keyword: Subglacial
Theme_Keyword: Till
Theme_Keyword: Magnetic Properties
Theme_Keyword: Wais
Theme_Keyword: West Antarctic Ice Sheet
Theme_Keyword: CLIMATOLOGY/METEOROLOGY/ATMOSPHERE
Theme_Keyword: GEOSCIENTIFIC INFORMATION
Theme_Keyword: ENGLISH
Place:
Place_Keyword_Thesaurus: GCMD
Place_Keyword: CONTINENT > ANTARCTICA
Place_Keyword: GEOGRAPHIC REGION > POLAR
Access_Constraints: No access constraints
Use_Constraints:
no constraints
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: STEFAN VOGEL
Contact_Position: TECHNICAL CONTACT
Contact_Address:
Address_Type: Mailing and Physical Address
Address: BPRC
Address: 108 Scott Hall
Address: 1090 Carmack Rd
City: C olumbus
State_or_Province: Ohio
Postal_Code: 43210
Country: USA
Contact_Voice_Telephone: 614-247-8082
Contact_Electronic_Mail_Address: vogel.118@osu.edu
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Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
Each entry in the database for the West Antarctic subglacial clasts represents an individual measurement on an individual clast.
Logical_Consistency_Report:
Not Available
Completeness_Report:
Not Available
Lineage:
Process_Step:
Process_Description:
Not Available
Process_Date: Unknown
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Spatial_Reference_Information:
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Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: OH-STATE/BPRC > Byrd Polar Research Center, The Ohio State University
Contact_Person: ANNE GRUNOW
Contact_Position: DATA CENTER CONTACT
Contact_Address:
Address_Type: Mailing and Physical Address
Address: United States Polar Rock Repository
Address: Byrd Polar Research Center
Address: Ohio State University
Address: 108 Scott Hall
Address: 1090 Carmack Road
City: Columbus
State_or_Province: Ohio
Postal_Code: 43210
Country: USA
Contact_Voice_Telephone: 614-292-5348
Contact_Electronic_Mail_Address: curator@bprc.mps.ohio-state.edu, grunow.1@osu.edu
Resource_Description: Antarctic Rock Magnetic Database
Distribution_Liability:
Not Available
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: Excel spreadsheet
Transfer_Size: 500kb
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://bprc.osu.edu/
Access_Instructions:
DATA CENTER URL
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://bprc.osu.edu/
Access_Instructions:
Rock Magnetic Clast data are at this website
Fees: 0
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Metadata_Reference_Information:
Metadata_Date: 20040823
Metadata_Review_Date: 20100707
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: GCMD User Support Office
Contact_Organization: NASA Global Change Master Directory
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Not Available
City: Lanham
State_or_Province: MD
Postal_Code: 20706
Country: USA
Contact_Voice_Telephone: Not Available
Contact_Electronic_Mail_Address: gcmduso@gcmd.gsfc.nasa.gov
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
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