Sea-floor spreading in the Lau back-arc basin

Details Sea-floor spreading in the Lau back-arc basin Sea-floor spreading in the Lau back-arc basin

Oct 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996e%26psl.144...35t&link_type=abstract

Earth and Planetary Science Letters, Volume 144, Issue 1-2, p. 35-40.

Physics

42

Scientific paper

We report the first 3-D magnetization inversion of bathymetry and magnetics data for the entire Lau Basin and confirm a history of southward-propagating sea-floor spreading during the past 4 Myr. Magnetic lineations, seafloor fabric and ridge segmentation patterns indicate that lithospheric accretion on discrete spreading centers in this back-arc basin is fundamentally similar to that occurring on mid-ocean ridges. The Brunhes Chron spreading rates (65-100 mm/yr) are < 75% of the opening rates determined geodetically. In the absence of earthquake evidence for significant off-axis deformation between 18-21°S, we infer that opening rates have recently increased on the central and east Lau spreading centers.

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