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Comparison of the magnetic properties and Mossbauer analysis of glass from the Cretaceous-Tertiary boundary, Beloc, Haiti, with tektitesThe magnetic properties of black Beloc glass have been measured. The Curie constant, the magnetization, and the magnetic susceptibility of the Beloc glass fall within the known ranges observed for tektites. However, the temperature-independent component of the magnetic susceptibility is slightly higher than that found for tektites. Moreover, it is not possible to match the experimental magnetic data for the Beloc glass with the calculated values using the previously reported Fe(3+)/Fe(2+) ratio of 0.7. The oxidation state of Fe was therefore redetermined by Mossbauer measurements, and the Fe(3+)/Fe(2+) ratio was found to be 0.024 plus or minus 0.015. Using the redetermined value of the ratio, the magnetic parameters were again calculated using formulas that are applicable to tektites, and good agreement was found between the calculated and experimental values. The experimental magnetic measurements and the redetermined Fe(3+)/Fe(2+) ratio of the Beloc glass specimens are essentially the same as those found for tektite glass.
Document ID
19950028410
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Thorpe, A. N.
(Howard University Washington, DC, United States)
Senftle, F. E.
(Howard University Washington, DC, United States)
May, L.
(Catholic University Washington, DC, United States)
Barkatt, A.
(Catholic University Washington, DC, United States)
Adel-Hadadi, M. A.
(Catholic University Washington, DC, United States)
Marbury, G. S.
(Catholic Univ. Washington, DC, United States)
Izett, G. A.
(US Geological Survey, Denver, CO United States)
Maurrasse, F. R.
(Florida International University Miami, FL, United States)
Date Acquired
August 16, 2013
Publication Date
May 25, 1994
Publication Information
Publication: Journal of Geophysical Research
Volume: 99
Issue: E5
ISSN: 0148-0227
Subject Category
Geophysics
Accession Number
95A60009
Funding Number(s)
CONTRACT_GRANT: EEC-9222622
CONTRACT_GRANT: NAG5-1057
Distribution Limits
Public
Copyright
Other

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