Nature of the Jurassic Magnetic Quiet Zone
MetadataShow full item record
The nature of the Jurassic Quiet Zone (JQZ), a region of low-amplitude oceanic magnetic anomalies, has been a long-standing debate with implications for the history and behavior of the Earth's geomagnetic field and plate tectonics. To understand the origin of the JQZ, we studied high-resolution sea surface magnetic anomalies from the Hawaiian magnetic lineations and correlated them with the Japanese magnetic lineations. The comparison shows the following: (i) excellent correlation of anomaly shapes from M29 to M42; (ii) remarkable similarity of anomaly amplitude envelope, which decreases back in time from M19 to M38, with a minimum at M41, then increases back in time from M42; and (iii) refined locations of pre-M25 lineations in the Hawaiian lineation set. Based on these correlations, our study presents evidence of regionally and possibly globally coherent pre-M29 magnetic anomalies in the JQZ and a robust extension of Hawaiian isochrons back to M42 in the Pacific crust.
Author Posting. © American Geophysical Union, 2015. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Geophysical Research Letters 42 (2015): 8367–8372, doi:10.1002/2015GL065394.
Suggested CitationGeophysical Research Letters 42 (2015): 8367–8372
Showing items related by title, author, creator and subject.
Magnetic mineral populations in lower oceanic crustal gabbros (Atlantis Bank, SW Indian Ridge): implications for marine magnetic anomalies Bowles, Julie A.; Morris, Antony; Tivey, Maurice A.; Lascu, Ioan (American Geophysical Union, 2020-02-28)To learn more about magnetic properties of the lower ocean crust and its contributions to marine magnetic anomalies, gabbro samples were collected from International Ocean Discovery Program Hole U1473A at Atlantis Bank on ...
Malkus, Willem V. R.; Berry, Mary Evans (Woods Hole Oceanographic Institution, 1988-05)Our principal lecturer, Stephen Childress, can be seen emerging from the "magnetic cottage" he constructed to edify those of us who attended G.F.D. '87. His central theme was the kinematic properties of the "fast" ...
Investigation of a marine magnetic polarity reversal boundary in cross section at the northern boundary of the Kane Megamullion, Mid-Atlantic Ridge, 23°40′N Xu, Min; Tivey, Maurice A. (John Wiley & Sons, 2016-05-12)Near-bottom magnetic field measurements made by the submersible Nautile during the 1992 Kanaut Expedition define the cross-sectional geometry of magnetic polarity reversal boundaries and the vertical variation of crustal ...