Geoscience Reference
In-Depth Information
rate inhibited a large amount of mantle melting within an intermediate-spreading
ridge, also attaining the Tucholke et al's limited window of the condition of magma
supply in an otherwise robust magmatic environment.
Acknowledgments
Most of the geophysical data (including bathymetry) for the Parece Vela
Basin were obtained through Japan's legal continental shelf survey. We thank our colleagues in
Continental Shelf Survey Office of the Hydrographic and Oceanographic Department of Japan for
compiling these data. Most of the bottom rock samplings in the Parece Vela Basin were conducted
through academic research expeditions with R/Vs
Kairei, Yokosuka
and
Hakuho.
The bathymetric
data used for Fig. 3 are from the Marine Geoscience Data System (
http://www.marine-geo.org/
).
We thank Osamu Ishizuka, Kenichiro Tani, Katsutyoshi Michibayahsi, Yumiko Harigane and
Teruaki Ishii for discussion. We thank Eric Hellebrand for providing the unpublished Ascension
peridotite data. We thank the helpful reviews by Hidenori Kumagai and Yildirim Dilek. We also
thank Yujiro Ogawa, Yildirim Dilek, and Ryo Amma for the editorial efforts.
References
Bach W, Erzinger J, Dosso L, Bollinger C, Bougault H, Etoubleau J, Sauerwein J (1996)
Unusually large Nb-Ta depletions in North Chile ridge basalts at 36°50¢ to 38°56'S: major
element, trace element, and isotopic data. Earth Planet Sci Lett 142:223-240
Behn MD, Boettcher MS, Hirth G (2007) Thermal structure of oceanic transform faults. Geology
35:307-310
Bell RE, Buck R (1992) Crustal control of ridge segmentation inferred from observations of the
Reykjanes Ridge. Nature 357:583-586
Blackman DK, Cann JR, Janssen B, Smith D (1998) Origin of extensional core complexes: evidence
from the Mid-Atlantic Ridge at Atlantis Fracture Zone. J Geophys Res 103(B9):21315-21333
Blackman DK, Canales JP, Harding A (2009) Geophysical signatures of oceanic core complexes.
Geophys J Int 178:593-613
Bonatti E, Seyler M, Sushevskaya N (1993) A cold suboceanic mantle belt at the Earth's equator.
Science 261:315-320
Brozena JM (1986) Temporal and spatial variability of seafloor spreading processes in the northern
South Atlantic. J Geophys Res 91((B1):497-510
Brozena JM, White RS (1990) Ridge jumps and propagations in the South Atlantic Ocean. Nature
348:149-152
Bruguier NJ, Minshull TA, Brozena JM (2003) Morphology and tectonics of the Mid-Atlantic
Ridge 7°-12°S. J Geophys Res. doi:10.1029/2001JB001172
Brunelli D, Seyler M (2010) Asthenospheric percolation of alkaline melts beneath the St. Paul
region (Central Atlantic Ocean). Earth Planet Sci Lett 289:393-405
Buck WR, Lavier LL, Poliakov ANB (2005) Modes of faulting at mid-ocean ridges. Nature
434:719-723
Cann JR, Blackman DK, Smith DK, McAllister E, Janssen B, Mello S, Avgerinos E, Pascoe AR,
Escartín J (1997) Corrugated slip surfaces formed at ridge-transform intersections on the Mid-
Atlantic Ridge. Nature 385:329-332
Cannat M, Sauter D, Mendel V, Ruellean E, Okino K, Escartín J, Combier V, Baala M (2006)
Modes of seafloor generation at a melt-poor ultraslow-spreading ridge. Geology 34:605-608
Christie DM, West BP, Pyle DG, Hanan BB (1998) Chaotic topography, mantle flow and mantle
migration in the Australian-Antarctic discordance. Nature 394:637-644
Constantin M (1999) Gabbroic intrusions and magmatic metasomatism in harzburgites from the
Garrett transform fault: implications for the nature of the mantle±crust transition at fast-
spreading ridges. Contrib Mineralog Petrol 136:111-130
Search WWH ::
Custom Search