Remanent magnetization of cement cores from Hole 648B: a possible logging tool for the downhole measurements of magnetic field

Y. Hamano, M. Ohno

Research output: Contribution to journalArticle

Abstract

The remanence properties of 62 cement samples from Cores 7R, 11R, and 12R recovered from Hole 648B were examined. The remanent magnetization consists of two components, where the soft component is carried by the basalt fragments in the cement sample and the hard component is carried by fine magnetic grains originally contained in cement. The hard component was used to estimate the variation of the magnetic field inclination within the hole. The result indicates that some parts of the basalt section within the sub-bottom depth between 15 and 20m are reversely magnetized, which can be attributed to the displacement of pillow basalt after its solidification. -Authors

Original languageEnglish
Pages (from-to)275-281
Number of pages7
JournalUnknown Journal
Publication statusPublished - Jan 1 1990

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remanent magnetization
cement
basalt
magnetic field
solidification

All Science Journal Classification (ASJC) codes

  • Environmental Science(all)
  • Earth and Planetary Sciences(all)

Cite this

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abstract = "The remanence properties of 62 cement samples from Cores 7R, 11R, and 12R recovered from Hole 648B were examined. The remanent magnetization consists of two components, where the soft component is carried by the basalt fragments in the cement sample and the hard component is carried by fine magnetic grains originally contained in cement. The hard component was used to estimate the variation of the magnetic field inclination within the hole. The result indicates that some parts of the basalt section within the sub-bottom depth between 15 and 20m are reversely magnetized, which can be attributed to the displacement of pillow basalt after its solidification. -Authors",
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N2 - The remanence properties of 62 cement samples from Cores 7R, 11R, and 12R recovered from Hole 648B were examined. The remanent magnetization consists of two components, where the soft component is carried by the basalt fragments in the cement sample and the hard component is carried by fine magnetic grains originally contained in cement. The hard component was used to estimate the variation of the magnetic field inclination within the hole. The result indicates that some parts of the basalt section within the sub-bottom depth between 15 and 20m are reversely magnetized, which can be attributed to the displacement of pillow basalt after its solidification. -Authors

AB - The remanence properties of 62 cement samples from Cores 7R, 11R, and 12R recovered from Hole 648B were examined. The remanent magnetization consists of two components, where the soft component is carried by the basalt fragments in the cement sample and the hard component is carried by fine magnetic grains originally contained in cement. The hard component was used to estimate the variation of the magnetic field inclination within the hole. The result indicates that some parts of the basalt section within the sub-bottom depth between 15 and 20m are reversely magnetized, which can be attributed to the displacement of pillow basalt after its solidification. -Authors

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