Publications
74 results found
Collier JS, Singh SC, 1998, Poissons ratio structure of young oceanic crust, Journal of Geophysical Research, Vol: 103, Pages: 20981-20996
Collier JS, Singh SC, 1998, A seismic inversion study of the axial magma chamber reflector beneath the East Pacific Rise near 10 degrees N, Modern Ocean Floor Processes and the Geological Record, Vol: 148, Pages: 17-28
Collier JS, Watts AB, 1997, Seismic-reflection constraints on lithospheric extension: Pure versus simple shear, GEOPHYSICAL JOURNAL INTERNATIONAL, Vol: 129, Pages: 737-748, ISSN: 0956-540X
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- Citations: 3
Watts AB, Peirce C, Collier J, et al., 1997, A seismic study of lithospheric flexure in the vicinity of Tenerife, Canary Islands, Earth and Planetary Science Letters, Vol: 146, Pages: 431-447, ISSN: 0012-821X
Collier JS, Danobeitia JJ, Canales JP, et al., 1997, Evidence for asymmetric accretion and low-angle, planar faults in slow-spreading oceanic crust, Geology, Vol: 25, Pages: 1075-1078
Collier JS, Singh SC, 1997, Detailed structure of the top of the melt body beneath the East Pacific Rise at 9 degrees 40'N from waveform inversion of seismic reflection data, Journal of Geophysical Research-Solid Earth, Vol: 102, Pages: 20287-20304
Collier JS, Buhl P, Torne M, et al., 1994, Moho and Lower Crustal Reflectivity beneath a Young Rift Basin - Results from a 2-Ship, Wide-Aperture Seismic-Reflection Experiment in the Valencia Trough (Western Mediterranean), Geophysical Journal International, Vol: 118, Pages: 159-180
Wiedicke M, Collier J, 1993, Morphology of the Valu Fa Spreading Ridge in the Southern Lau Basin, Journal of Geophysical Research-Solid Earth, Vol: 98, Pages: 11769-11782
Collier JS, Sinha MC, 1992, Seismic mapping of a magma chamber beneath the Valu Fa Ridge, Lau Basin, Journal of Geophysical Research: Solid Earth, Vol: 97, Pages: 14031-14053, ISSN: 0148-0227
<jats:p>We analyze a dense grid of seismic normal incidence and wide‐angle data collected over an active back arc spreading center in the Lau Basin of the southwest Pacific. Our survey area covers the whole of a 35‐km‐long morphological segment and a small overlapping spreading center. A bright reflector, which is coincident with a velocity inversion at a depth of 3.2 ± 0.2 km below the seafloor, is observed on every one of the 40 across‐axis profiles. We interpret this reflector as being the roof of a crustal magma chamber. The widest magma chamber reflector occurs beneath the overlapping spreading center, where it extends up to 4 km, being imaged beneath both ridges and, in places, beneath the overlap basin. Elsewhere the width of the reflector varies between 0.6 and 2.3 ±0.4 km. The narrowest reflectors are observed beneath deviations (devais) of the ridge axis. In addition to being observed on each of the kilometer‐spaced across‐axis profiles the reflector is also seen as a continuous event for at least 10 km on a profile along the ridge axis. The reflection coefficient of the event is between −0.34 and −0.65. This requires the melt at the top of the chamber to have a <jats:italic>P</jats:italic> wave velocity less than 2.7 km/s if the interface is planar or less than 3.8 km/s if the interface is layered.</jats:p>
MINSHULL TA, WHITE RS, BARTON PJ, et al., 1992, DEFORMATION AT PLATE BOUNDARIES AROUND THE GULF-OF-OMAN, MARINE GEOLOGY, Vol: 104, Pages: 265-277, ISSN: 0025-3227
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- Citations: 45
Collier JS, Sinha MC, 1992, The Valu Fa Ridge - the Pattern of Volcanic Activity at a Back-Arc Spreading Center, Marine Geology, Vol: 104, Pages: 243-263
Collier JS, White RS, 1990, Mud Diapirism within Indus Fan Sediments - Murray Ridge, Gulf of Oman, Geophysical Journal International, Vol: 101, Pages: 345-353
Collier J, Sinha M, 1990, Seismic Images of a Magma Chamber beneath the Lau Basin Back-Arc Spreading Center, Nature, Vol: 346, Pages: 646-648
HARDISTY J, COLLIER J, HAMILTON D, 1984, A CALIBRATION OF THE BAGNOLD BEACH EQUATION, MARINE GEOLOGY, Vol: 61, Pages: 95-101, ISSN: 0025-3227
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- Citations: 28
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