Viscous demagnetization and the longevity of paleomagnetic polarity messages
Denham, Charles R.
MetadataShow full item record
Viscous decay of magnetic polarity messages in rocks is slowed 3- to-6 fold by the reversing nature of the geomagnetic field, compared with the effect expected in a field that is constantly polarized oppositely to the original remanence. The process is studied analytically and numerically for the known geomagnetic polarity sequence, as well as for simulated sequences having constant-length and Poisson-distributed lengths of polarity intervals. For equal average-interval lengths, the random Poisson reversing process causes more rapid decay than does the periodic reversing process.
Also published as: Geophysical Research Letters 8 (1981): 137-140
Suggested CitationDenham, C. R. (1981). Viscous demagnetization and the longevity of paleomagnetic polarity messages. Woods Hole Oceanographic Institution. https://doi.org/10.1575/1912/10263
Showing items related by title, author, creator and subject.
Deep-sea sediment records of the Laschamp geomagnetic field excursion (∼41,000 calendar years before present) Lund, Steve P.; Schwartz, Martha; Keigwin, Lloyd D.; Johnson, Thomas (American Geophysical Union, 2005-04-02)We have recovered two new high-resolution paleomagnetic records of the Laschamp Excursion (∼41,000 calendar years B.P.) from deep-sea sediments of the western North Atlantic Ocean. The records document that the Laschamp ...
Chave, Alan D. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1980-06)This thesis consists of three papers applying the techniques of time series analysis to geophysical data. Surface wave dispersion along the Walvis Ridge, South Atlantic Ocean, is obtained by bandpass filtering the ...
The origin of the ninetyeast ridge and the northward motion of India, based on DSDP paleolatitudes Peirce, John Wentworth (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1977-01)This thes is is a collection of papers on the paleomagnetics of samples from several Deep Sea Drilling Project (DSDP) sites in the Indian Ocean. These papers present the basic paleomagnetic data, discuss the statistical ...