Dertermining the Exposure Ages and Erosion Rates of Bedrock Surfaces in Antarctic with in Situ Produced Radionuclides
{'Code': '01020304', 'Directorate': {'Abbreviation': 'O/D', 'LongName': 'Office Of The Director'}, 'Division': {'Abbreviation': 'OPP', 'LongName': 'Office of Polar Programs'}}
{'SignBlockName': 'Mary Campbell', 'PO_EMAI': None, 'PO_PHON': None}
This study seeks to develop a technique to determine                       exposure ages and erosion rates of bedrock surfaces by studying,                by accelerator mass spectrometry, the history of production in                  situ, radioactive decay, and erosional loss of the cosmogenic                   radionuclides Be and Al in quartz samples from those surfaces.                  Preliminary measurements on a variety of samples indicate that                  Antarctic bedrock surfaces retain very high concentrations of Be                and Al, apparently a consequence of very slow erosion rates.                         This technique is now ready for application in a systematic                way on a suite of 73 samples of quartz-rich rock from the dry                   valleys of the Antarctic and from a sedimentary veneer on the                   Elephant Moraine.  Be and Al concentrations will be measured in                 quartz separated from those samples to determine the extent of                  prior glacial cover of bedrock surfaces now exposed and the                     chronology of accumulation of moraine particles on the surface of               the Elephant Moraine.  This investigation will be a collaborative               effort by scientists at the University of Pennsylvania and Ohio                 State University.
[{'FirstName': 'Robert', 'LastName': 'Giegengack', 'PI_MID_INIT': 'F', 'PI_SUFX_NAME': None, 'PI_FULL_NAME': 'Robert F Giegengack', 'EmailAddress': 'rgiegeng@pennsas.upenn.edu', 'NSF_ID': '000177544', 'StartDate': '03/01/1988', 'EndDate': None, 'RoleCode': 'Principal Investigator'}, {'FirstName': 'Roy', 'LastName': 'Middleton', 'PI_MID_INIT': None, 'PI_SUFX_NAME': None, 'PI_FULL_NAME': 'Roy Middleton', 'EmailAddress': 'jklein@dept.physics.upenn.edu', 'NSF_ID': '000208358', 'StartDate': '03/01/1988', 'EndDate': None, 'RoleCode': 'Co-Principal Investigator'}]
{'Name': 'University of Pennsylvania', 'CityName': 'PHILADELPHIA', 'ZipCode': '191046205', 'PhoneNumber': '2158987293', 'StreetAddress': '3451 WALNUT ST STE 440A', 'StreetAddress2': None, 'CountryName': 'United States', 'StateName': 'Pennsylvania', 'StateCode': 'PA', 'CONGRESSDISTRICT': '03', 'CONGRESS_DISTRICT_ORG': 'PA03', 'ORG_UEI_NUM': 'GM1XX56LEP58', 'ORG_LGL_BUS_NAME': 'TRUSTEES OF THE UNIVERSITY OF PENNSYLVANIA, THE', 'ORG_PRNT_UEI_NUM': 'GM1XX56LEP58'}
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[{'Code': '5112', 'Text': 'ANT Earth Sciences'}, {'Code': '5116', 'Text': 'ANT Glaciology'}]
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