Global topography and bathymetry grid improves research efforts

Lindquist, K. G.; Engle, Kevin; Stahlke, Dan; Price, Evelyn

doi:10.1029/2004eo190003

Cited by 75 publications

(51 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As a result, the thermal state varies and leads to a latitudinally different buoyancy of the subducted Nazca Plate, which contributes, along with the decreasing sediment input at lower latitudes, to the northward increasing water depth at the trench axis. Values range from c. 8200 mbsl (metres below sea level) off northern Chile (at 23820'S) to around 4100 mbsl at 448S and 3300 mbsl at the Chile Triple Junction (Smith & Sandwell 1997;Lindquist et al 2004). Height differences of up to 15 km from the highest Andean peaks to the deepest parts in the trench (e.g.…”

Section: Plate-tectonic Oceanographic and Climatic Settingmentioning

confidence: 99%

Holocene sediments from the Southern Chile Trench: a record of active margin magmatism, tectonics and palaeoseismicity

Heberer

Röser²,

Behrmann

et al. 2010

JGS

View full text Add to dashboard Cite

Sedimentology, petrography and the provenance of Holocene sediments from the Southern Chile Trench (36-478S) were investigated in an integrated approach combining description of a collection of gravity cores, measurements of physical properties, quantitative X-ray petrography and modal analysis. The sediments studied were trench hemipelagic sediments, fan deposits, and more distal hemipelagic sediments from the Nazca Plate. The trench is mostly fed by multiple point sources via submarine canyons. Sandy turbidites show a southward increase in sediment maturity. Whereas volcanic lithic fragments and plagioclase represent the dominant fraction in the north, quartz content strongly increases in the southern part of the study area, in line with source lithologies. Further north, active volcanoes in the Main Cordillera represent almost the entire provenance signal as a result of a strong contribution of highly erodible volcanic rocks. Recurrence rates of sandy and silty turbidites in the trench fan sediments indicate a link to the palaeoseismic record on land. Our study documents the potential usefulness of proximal turbidites to reconstruct palaeoseismicity, even at a scale of single segments of the plate boundary.

show abstract

Section: Plate-tectonic Oceanographic and Climatic Settingmentioning

confidence: 99%

Holocene sediments from the Southern Chile Trench: a record of active margin magmatism, tectonics and palaeoseismicity

Heberer

Röser²,

Behrmann

et al. 2010

JGS

View full text Add to dashboard Cite

show abstract

“…1a), which both form morphological highs, deepens from *3,800 m below sea level at 44°S to *5,000 m at 36°S (e.g. Lindquist et al 2004;Kukowski and Oncken 2006). The present average trench fill is *2 km thick with high average sedimentation rates since the Pliocene linked to glaciation/deglaciation and fast denudation of the Andean Cordillera (e.g.…”

Section: Introductionmentioning

confidence: 97%

Complete recycling of a magmatic arc: evidence from chemical and isotopic composition of Quaternary trench sediments in Chile (36°–40°S)

Lucassen

Wiedicke

Franz

2009

Int J Earth Sci (Geol Rundsch)

View full text Add to dashboard Cite

Marine Quaternary trench and slope sediments were sampled along the margin of the Southern Andes, Chile between 36°and 40°S. Major and trace element contents indicate only minor influence of weathering and transport fractionation. The whole rock composition of the sediments is similar to the average rock of the Cretaceous to Holocene magmatic arc of this section of the southern volcanic zone. Sr, Nd, and Pb isotope composition of the sediments also resembles closely the average composition of the magmatic arc. The contribution of compositionally distinct Palaeozoic crust, which makes up most of the volume of the forearc, is *0-20% crustal Sr, Nd, and Pb according to the isotope record of the trench and slope sediments. Input of sediments from the continent into the subduction system was dominated by detritus from the magmatic arc at least for the last 20 My on the basis of the Oligocene to Holocene exhumation history of the margin.

show abstract

“…8 for subevent 3). Background map file is from Lindquist et al (2004). 90 s, coincident with the peak on the acceleration trace.…”

Section: Timing and Location Of Subeventsmentioning

confidence: 99%

“…The computer programs for making synthetic seismograms for plane-layered media can be obtained from Lupei Zhu of St. Louis University. The background map file was made by Lindquist et al (2004) and is available from http://www.agu.org/pubs/ crossref/2004/2004EO190003.shtml (last accessed March 2012). GMT (Wessel and Smith, 1991) was used to make the maps (http://gmt.soest.hawaii.edu; last accessed March 2012).…”

Section: Data and Resourcesmentioning

confidence: 99%

Rupture History of the 2011 M 9 Tohoku Japan Earthquake Determined from Strong-Motion and High-Rate GPS Recordings: Subevents Radiating Energy in Different Frequency Bands

Frankel

2013

Bulletin of the Seismological Society of America

View full text Add to dashboard Cite

Strong-motion records from KiK-net and K-NET, along with 1 sample/s Global Positioning System (GPS) records from GEONET, were analyzed to determine the location, timing, and slip of subevents of the M 9 2011 Tohoku earthquake. Timing of arrivals on stations along the coast shows that the first subevent was located closer to the coast than subevent (2), which produced the largest slip. A waveform inversion of data from 0 to 0.2 Hz indicates that the first subevent primarily ruptured down-dip and north of the hypocenter and had an M of 8.5. The areas of this subevent that generated the low (< 0:2 Hz) and high (> 0:2 Hz) frequency energy are located in the same vicinity. The inversion result for the second subevent (M 9.0) has large slip on the shallow part of the fault with peak slip of about 65 m above about 25 km depth. This slip generated the tsunami. The preferred inversion has initiation of subevent 2 on the shallow portion of the fault so that rupture proceeded down-dip and mainly to the south. Subevent 2 started about 35 s after subevent 1, which allows for the possibility of dynamic triggering from subevent 1. The slip model predicts displacements comparable to those found from ocean-bottom transducers near the epicenter. At frequencies that most affect tall buildings (0.1-0.5 Hz), there is a strong pulse (subevent 3) in the strong-motion records that arrives after the near-field ramp from subevent 2. High-frequency subevent 3 was located down-dip and south of the high-slip portion of subevent 2 and was initiated as rupture from subevent 2 proceeded down-dip. The compact pulse for subevent 3 is modeled with an M 8.0 source in a 75 by 30 km area that ruptured down-dip and to the south with a high slip velocity, indicating high stress drop.

show abstract

Global topography and bathymetry grid improves research efforts

Abstract: Combining altimetric height with broadscale profile data to estimate steric height, heat storage, subsurface temperature, and sea-surface tempera ture variability^ Geophys. Res., /0£(C9),3292,

Cited by 75 publications

References 3 publications

Holocene sediments from the Southern Chile Trench: a record of active margin magmatism, tectonics and palaeoseismicity

Holocene sediments from the Southern Chile Trench: a record of active margin magmatism, tectonics and palaeoseismicity

Complete recycling of a magmatic arc: evidence from chemical and isotopic composition of Quaternary trench sediments in Chile (36°–40°S)

Rupture History of the 2011 M 9 Tohoku Japan Earthquake Determined from Strong-Motion and High-Rate GPS Recordings: Subevents Radiating Energy in Different Frequency Bands

Contact Info

Product

Resources

About