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Radioactive and magnetic investigationsAge and growth pattern determination of manganese nodules were explored. Two methods are discussed: (1) measurement of the presence of radioactive iodine isotopes; which is effective only up to 3.105 years, and (2) measurements of magnetism. The growth rates of three nodules were determined. The surface of the nodule was recent, and the overall age of the nodule could be determined with accuracy of better than 30%. Measurement of paleomagnetic effect was attempted to determine wider age ranges, however, the measured sign changes could not be interpreted as paleomagnetic reversals.
Document ID
19810014315
Acquisition Source
Legacy CDMS
Document Type
Technical Memorandum (TM)
Authors
Heye, D. (NASA Headquarters Washington, DC United States)
Beiersdorf, H. (NASA Headquarters Washington, DC United States)
Date Acquired
September 4, 2013
Publication Date
July 1, 1979
Subject Category
Atomic And Molecular Physics
Report/Patent Number
NASA-TM-75508
Accession Number
81N22848
Funding Number(s)
CONTRACT_GRANT: NASW-3199
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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