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Global Change Master Directory (GCMD)
Central Scotia Seafloor and the Drake Passage Deep Ocean Current Gateway
Entry ID: NSF-ANT06-36850


Summary
Abstract: This project studies the opening of the Drake Passage between South America and Antarctica through a combined marine geophysical survey and geochemical study of dredged ocean floor basalts. Dating the passage's opening is key to understanding the formation of the circum-Antarctic current, which plays a major role in worldwide ocean circulation, and whose formation is connected with growth of the Antarctic ice sheet. Dredge samples will undergo various geochemical studies to determine their age and constrain mantle flow beneath the region. Broader impacts include support for graduate education, as well as undergraduate and K12 teacher involvement in a research cruise. The project also involves international collaboration with the UK and is part of IPY Project #77: Plates&Gates, which aims to reconstruct the geologic history of polar ocean basins and gateways for computer simulations of climate change. See http://www.ipy.org/index.php?/ipy/detail/plates_gates/ for more information.

Related URL
Link: View Related Information
Description: Original data submitted by lead investigator.


Link: View Related Information
Description: NSF Award Abstract #0636850

Geographic Coverage
 N: -52.0 S: -62.0  E: -35.0  W: -70.0

Data Set Citation
Version: Not provided


Temporal Coverage
Start Date: 2007-07-15
Stop Date: 2009-06-30


Location Keywords
OCEAN > SOUTHERN OCEAN
GEOGRAPHIC REGION > POLAR
VERTICAL LOCATION > SEA FLOOR
SOLID EARTH > CRUST


Science Keywords
OCEANS >BATHYMETRY/SEAFLOOR TOPOGRAPHY    [Definition]
SOLID EARTH >GEOMAGNETISM >MAGNETIC FIELD >MAGNETIC ANOMALIES    [Definition]
SOLID EARTH >ROCKS/MINERALS/CRYSTALS >IGNEOUS ROCKS    [Definition]


Project
USARP >U.S. Antarctic Research Program    [Information]


Data Set Progress
COMPLETE


Data Center
United States Antarctic Program Data Center    [Information]
Data Center URL: http://www.usap-dc.org/

Data Center Personnel
Name: ROBERT A. ARKO
Email: info at usap-data.org
Contact Address:
Lamont-Doherty Earth Observatory
61 Route 9W
City: Palisades
Province or State: NY
Postal Code: 10964
Country: USA


Personnel
IAN DALZIEL
Role: INVESTIGATOR
Email: ian at ig.utexas.edu
Contact Address:
University of Texas Institute for Geophysics
City: Austin
Province or State: TX
Postal Code: 78758
Country: US


LAWRENCE LAWVER
Role: INVESTIGATOR
Email: lawver at ig.utexas.edu
Contact Address:
University of Texas Institute for Geophysics
City: Austin
Province or State: TX
Postal Code: 78758
Country: US


Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2009-04-15
Last DIF Revision Date: 2018-11-12



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