CONSTRAINTS IMPOSED BY THE SHAPE OF MARINE MAGNETIC ANOMALIES ON THE MAGNETIC SOURCE.

Steven C. Cande, Dennis V. Kent

Research output: Contribution to journalArticlepeer-review

56 Scopus citations

Abstract

A two-layer source model for marine magnetic anomalies can accommodate several observations made on the shapes of anomalies in the Pacific and southeast Indian oceans. The layers are defined on the basis of cooling history and magnetic properties. The upper layer consists of rapidly cooled basalts, which acquire a strong magnetization near the ridge axis. This layer, with narrow transition zones, can account for the observed short polarity events. The lower layer consists of moderately magnetized, slowly cooled intrusive rocks in the lower oceanic crust. The transition zones in this layer are broad, sloping boundaries reflecting the delayed acquisition of magnetization with depthexample, along a sloping Curie point isotherm. The lower layer can account for a skewness discrepancy of 10 degree -15 degree in the observed skewness of some anomalies. It is shown that the upper layer has to contribute about three quarters of the total amplitude of magnetic anomalies in order for this model to simulate the observed shape of the anomalies.

Original languageEnglish (US)
Pages (from-to)4157-4162
Number of pages6
JournalJ Geophys Res
Volume81
Issue number23
DOIs
StatePublished - Jan 1 1976
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Forestry
  • Oceanography
  • Aquatic Science
  • Ecology
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Palaeontology

Fingerprint Dive into the research topics of 'CONSTRAINTS IMPOSED BY THE SHAPE OF MARINE MAGNETIC ANOMALIES ON THE MAGNETIC SOURCE.'. Together they form a unique fingerprint.

Cite this