A5017916668- earthquake and tectonic studies
- Methane Hydrates and Related Phenomena
- Geological and Geochemical Analysis
- Reservoir Engineering and Simulation Methods
- Geological and Geophysical Studies
- Seismic Imaging and Inversion Techniques
- Drilling and Well Engineering
- Seismic Waves and Analysis
- High-pressure geophysics and materials
- Hydraulic Fracturing and Reservoir Analysis
- Hydrocarbon exploration and reservoir analysis
- Geological and Tectonic Studies in Latin America
- Seismology and Earthquake Studies
- Offshore Engineering and Technologies
- Geology and Paleoclimatology Research
- Atmospheric and Environmental Gas Dynamics
- Geological formations and processes
- Geological and Geophysical Studies Worldwide
- Geological Modeling and Analysis
- Botany and Geology in Latin America and Caribbean
- Geological Studies and Exploration
- Underwater Acoustics Research
- Geophysics and Sensor Technology
- Geophysics and Gravity Measurements
- Geochemistry and Geologic Mapping
The University of Texas at Austin
2016-2025
University of Texas Institute for Geophysics
2010-2024
GNS Science
2023
Japan Agency for Marine-Earth Science and Technology
2007-2023
Western Washington University
2023
Badan Pengkajian dan Penerapan Teknologi
2015
University of Houston
2011-2013
Burnet Institute
2009-2011
Geological Survey of Canada
2010
Natural Resources Canada
2010
Megasplay faults, very long thrust faults that rise from the subduction plate boundary megathrust and intersect sea floor at landward edge of accretionary prism, are thought to play a role in tsunami genesis. We imaged megasplay system along Nankai Trough three dimensions, which allowed us map splay fault geometry its lateral continuity. The is continuous main interface upwards floor, where it cuts older slices frontal prism. evidence large-scale slumping surficial sediments show active...
We present results of a seismic reflection and refraction investigation the Aleutian island arc, designed to test hypothesis that volcanic arcs constitute building blocks continental crust. The arc has requisite thickness (30 km) build crust, but it differs strongly from crust in its composition reflectivity structure. Seismic velocities compositions erupted lavas suggest mafic bulk composition, contrast andesitic continents. silicic upper reflective lower are characteristic conspicuously...
Log and core data document gas saturations as high 90% in a coarse‐grained turbidite sequence beneath the hydrate stability zone (GHSZ) at south Hydrate Ridge, Cascadia accretionary complex. The geometry of this gas‐saturated bed is defined by strong, negative‐polarity reflection 3D seismic data. Because buoyancy, pressure equals or exceeds overburden stress immediately GHSZ summit. We conclude that focused into from large volume complex trapped until forces to migrate through seafloor...
Many major geological terranes are interpreted as accretionary complexes, and there several speculative models for their structure mode of formation. The seismic reflection section across the Barbados Ridge complex at lat 16°12′N presented here shows, first time, entire cross-sectional shape a large wedge its forearc basin. Atlantic oceanic crust underlies 122 km then passes beneath Caribbean plate, where it can be traced 15 farther; dips landward 9°. basement seaward to meet ocean crust....
Seismic reflection data acquired in the vicinity of Isla Mocha across southern coast Chile image structures formed along continental margin and reveal an episodic history accretion, nonaccretion, possibly erosion. Structures at toe slope suggest frontal accretion ¾ to 1 km trench fill. images also that a small accretionary wedge, 20–30 wide, abuts truncated metamorphic basement extends seaward from beneath shelf. The size wedge on three profiles examined here is not consistent with long...
Research Article| October 01, 1993 Free gas at the base of hydrate zone in vicinity Chile triple junction Nathan L. B. Bangs; Bangs 1Institute for Geophysics, University Texas Austin, 8701 Mopac Expressway, 78759 Search other works by this author on: GSW Google Scholar Dale S. Sawyer; Sawyer 2Department Geology and Rice University, P.O. Box 1892, Houston, 77251 Xenia Golovchenko 3Lamont-Doherty Earth Observatory, Columbia Palisades, New York 10964 Author Article Information Publisher:...
Research Article| May 01, 1994 Seismically inferred dilatancy distribution, northern Barbados Ridge decollement: Implications for fluid migration and fault strength Thomas H. Shipley; Shipley 1Institute Geophysics, University of Texas, Austin, Texas 78759 Search other works by this author on: GSW Google Scholar Gregory F. Moore; Moore 2Department Geology Hawaii, Honolulu, Hawaii 96822 Nathan L. Bangs; Bangs J. Casey 3Earth Sciences, California, Santa Cruz, California 95064 Paul Stoffa Author...
Research Article| April 01, 2004 Evolution of the Nankai Trough décollement from trench into seismogenic zone: Inferences three-dimensional seismic reflection imaging Nathan L. Bangs; Bangs 1Institute for Geophysics, University Texas, 4412 Spicewood Springs Road, Austin, Texas 78759, USA Search other works by this author on: GSW Google Scholar Thomas H. Shipley; Shipley Sean P.S. Gulick; Gulick Gregory F. Moore; Moore 2Department Geology and Hawaii at Manoa, Honolulu, 96822, Shinichi...
Research Article| August 01, 2006 Seamount subduction erosion in the Nankai Trough and its potential impact on seismogenic zone Nathan L.B. Bangs; Bangs 1Institute for Geophysics, University of Texas at Austin, 4412 Spicewood Springs Road, 78759, USA Search other works by this author on: GSW Google Scholar Sean P.S. Gulick; Gulick Thomas H. Shipley Author Article Information Publisher: Geological Society America Received: 22 Nov 2005 Revision 08 Mar Accepted: 12 First Online: 09 2017 Online...
Three wide‐aperture (0–5 km offset) seismic profiles were shot perpendicular to the strike of Barbados Ridge accretionary complex at 16°12′N (line 465), 14°23′N 480), and 13°20′N 484) image deep structure obtain velocity data. Velocity analyses on full‐fold common depth point (CDP) gathers used provide velocity/depth functions 1 separation along each line map variation in with distance across complex. The sediments within show consolidation increasing laterally greater age as indicated by...
Research Article| March 01, 2010 A low-velocity zone with weak reflectivity along the Nankai subduction Jin-Oh Park; Park * 1Ocean Institute, University of Tokyo, Tokyo 164-8639, Japan2Institute for on Earth Evolution, Japan Agency Marine-Earth Science and Technology, Yokohama 236-0001, *E-mail: jopark@ori.u-tokyo.ac.jp. Search other works by this author on: GSW Google Scholar Gou Fujie; Fujie 2Institute Lalith Wijerathne; Wijerathne Takane Hori; Hori Shuichi Kodaira; Kodaira Yoshio Fukao;...
Quake Control Large earthquakes occur at the margins of two colliding plates, where one plate subducts beneath other a shallow angle. These megathrust often cause destructive tsunamis owing to displacement large volumes water fault along boundary. Two related studies seismic structure subduction zones attempt reveal underlying mechanisms (see Perspective by Wang ). Kimura et al. (p. 210 ) compared reflection images and microearthquake locations Philippine Sea it obliquely Japan. The...
Abstract In 2011 we acquired an 11 × 55 km, 3‐D seismic reflection volume across the Costa Rica margin, NW of Osa Peninsula, to accurately image subduction thrust in 3‐D, examine fault zone properties, and infer hydrogeology that controls fluid accumulation along thrust. Following processing remove water column multiples, noise, acquisition artifacts, constructed a velocity model for Kirchhoff prestack depth migration imaging. Images plate boundary show high‐reflection amplitudes underneath...
We conducted discrete numerical simulations to examine the effects of seamount collisions with forearcs along actively accreting subduction margins. Modeled interactions leave behind distinctive structures in overriding that differ from those found at non-accreting Whereas accretion above a planar decollement produces evenly spaced thrust faults uniform displacements, seamounts activate one or more large-offset splay accommodate substantial offset. Locally oversteepened slopes develop...
Abstract Four decades of seismic reflection, onshore‐offshore and ocean‐bottom data are integrated to constrain a high‐resolution 3‐D P‐wave velocity model the Hikurangi subduction zone. Our shows wavespeeds in offshore forearc be 0.5–1 km/s higher south than central northern segments ( V P ≤ 4.5 km/s). Correlation with onshore geology reflection sets suggest wavespeed variability overthrusting plate reflects spatial distribution Late Jurassic basement terranes. The crustal backstop is 25–35...