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Structure And Petrophysical Properties Of The Southern Chile Subduction Zone Along 3825s From Seismic Data
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Book Synopsis Structure and Petrophysical Properties of the Southern Chile Subduction Zone Along 38.25°S from Seismic Data by : Catalina Ramos
Download or read book Structure and Petrophysical Properties of the Southern Chile Subduction Zone Along 38.25°S from Seismic Data written by Catalina Ramos and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Active and passive source data from two seismic experiments within the interdisciplinary project TIPTEQ (from The Incoming Plate to mega Thrust EarthQuake processes) were used to image and identify the structural and petrophysical properties (such as P- and S-velocities, Poisson's ratios, pore pressure, density and amount of fluids) within the Chilean seismogenic coupling zone at 38.25°S, where in 1960 the largest earthquake ever recorded (Mw 9.5) occurred. Two S-wave velocity models calculated using traveltime and noise tomography techniques were merged with an existing velocity model to obtain a 2D S-wave velocity model, which gathered the advantages of each individual model. In a following step, P- and S-reflectivity images of the subduction zone were obtained using different pre stack and post-stack depth migration techniques. Among them, the recent prestack line-drawing depth migration scheme yielded revealing results. Next, synthetic seismograms modelled using the reflectivity method allowed, through their input 1D synthetic P- and S-velocities, to infer the composition and rocks within the subduction zone. Finally, an image of the subduction zone is given, jointly interpreting the results from this work with results from other studies. The Chilean seismogenic coupling zone at 38.25°S shows a continental crust with highly reflective horizontal, as well as (steep) dipping events. Among them, the Lanalhue Fault Zone (LFZ), which is interpreted to be east-dipping, is imaged to very shallow depths. ...
Book Synopsis Investigating Trench Sediment Consolidation and Upper Plate Structures and Their Links to Seismic Behavior Using Active-source 2D Seismic Data in South-central Chile and Hikurangi by : Kelly Marie Olsen
Download or read book Investigating Trench Sediment Consolidation and Upper Plate Structures and Their Links to Seismic Behavior Using Active-source 2D Seismic Data in South-central Chile and Hikurangi written by Kelly Marie Olsen and published by . This book was released on 2021 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt: Subduction zones are convergent margins where one tectonic plate slides beneath another and is recycled into the mantle. Pelagic, hemi-pelagic, and terrigenous sediment deposited onto the subducting plate is off-scraped onto the overriding plate to form an accretionary prism or subduct beneath the overriding plate on top of the subducting plate, where the sediment is either accreted to the base of the upper plate or subducted to at least volcanic depths, or a combination of these processes can occur. Here, I use 2D active-source marine seismic data to create pre-stack depth migrated images and p-wave velocity models to investigate properties of accreted and subducted sediment and examine accretionary wedge and shallow upper plate structures on two thick-sedimented subduction zone margins, the south-central Chile and Hikurangi margin. These two subduction zones have very different seismic behavior; the south-central Chile margin is the location of the largest and sixth largest instrumentally recorded earthquakes, and has a long history of great earthquakes, while the Hikurangi margin has no evidence of very large ruptures, but both deep and shallow slow slip events are observed along this margin. I first examine the south-central Chile margin using 13 seismic transects across the trench and frontal wedge in south-central Chile to investigate along-strike variations in trench sediment properties to understand the partitioning of trench sediment into accreted vs subducted sediment, and link the properties of the subducting sediment to large megathrust earthquakes that have occurred along this margin. I then analyze upper plate structures along the 13 transects, such as thrust and normal faults imaged in the slope sediment, and discuss the relationship between the mechanisms that formed the faults, the stability of the wedge, and how wedge stability may vary throughout the seismic cycle. I then focus on the Hikurangi margin, where the Hikurangi Plateau, part of the Pacific Plate, subducts beneath the Australian Plate. I use three transects across the trench and accretionary prism to investigate differences in sediment consolidation and frontal wedge development due to seamounts on the incoming plate, and discuss potential implications for slow slip events
Book Synopsis Subduction Zones Part II by : Larry J. Ruff
Download or read book Subduction Zones Part II written by Larry J. Ruff and published by Birkhäuser. This book was released on 2012-12-06 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: Subduction zones consume oceanic lithosphere and are an indispensible part of plate tectonics. Unlike the oceanic lithosphere production system which can be linked as a nearly continuous, albeit sinuous, strand around the earth, subduction zones are a rather dissociated group and are found in several isolated corners of the world. While plate tectonics can predict that subduction zones are required along certain plate boundaries, it does not stipulate how subduction zones initiate and develop. The preservation of newly created oceanic lithosphere and the propensity for spreading centers to fragment continents leaves a wealth of geological informa tion on the initiation and evolution of spreading. On the other hand, the subject of subduction initiation has little observational basis. To find such observations, we need to look at some muddled tectonic regimes. The Macquarie Ridge complex presents a natural laboratory for studies of subduction initiation. 2. Tectonics of the Macquarie Ridge Complex The Macquarie Ridge complex is a complicated physiographic feature that trends approximately north-south between South Island, New Zealand and the Pacific-Antarctica spreading center. This feature consists of a sequence of troughs and ridges, with Macquarie Island as the only exposed expression. The seismically active Macquarie Ridge complex (hereafter: MRC) is crudely continuous with the Tonga-Kermadec-New Zealand seismic activity. The basic physiographic features and seismicity of the MRC are shown in Figure I. The earthquake epicenters generally cluster about the bathymetric expression of the MRC.
Book Synopsis The South Chilean Subduction Zone Between 41° and 43.5°S by : Dietrich Lange
Download or read book The South Chilean Subduction Zone Between 41° and 43.5°S written by Dietrich Lange and published by . This book was released on 2008 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Crustal Structure and Earthquake Hazards of the Subduction Zone in Southwestern British Columbia and Western Washington by : Michael A. Fisher
Download or read book Crustal Structure and Earthquake Hazards of the Subduction Zone in Southwestern British Columbia and Western Washington written by Michael A. Fisher and published by Geological Survey (USGS). This book was released on 2005 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Characterization of the Subduction Zone Seismic Cycle of the Northern Chile-Southern Peru Seismic Gap Region by : Felix Hoffmann
Download or read book Characterization of the Subduction Zone Seismic Cycle of the Northern Chile-Southern Peru Seismic Gap Region written by Felix Hoffmann and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Seismic Velocity Structure of the Southern Cascadia Subduction Zone from Forward Modeling of Delay Times by : Jeffrey B. Roth
Download or read book Seismic Velocity Structure of the Southern Cascadia Subduction Zone from Forward Modeling of Delay Times written by Jeffrey B. Roth and published by . This book was released on 2006 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Seismic Structure Beneath the Aysén Region of Chile by : Matthew Robert Miller
Download or read book The Seismic Structure Beneath the Aysén Region of Chile written by Matthew Robert Miller and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Subduction Zones written by Larry J. Ruff and published by . This book was released on 1989 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Cascadia Subduction Zone and Related Subduction Systems by : Stephen H. Kirby
Download or read book The Cascadia Subduction Zone and Related Subduction Systems written by Stephen H. Kirby and published by . This book was released on 2015-02-16 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Book Synopsis Seismic structure of the central Andean subduction zone from local earthquake data by :
Download or read book Seismic structure of the central Andean subduction zone from local earthquake data written by and published by . This book was released on 2001 with total page 125 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis New Insights on the Structure of the Cascadia Subduction Zone from Amphibious Seismic Data by : Helen A. Janiszewski
Download or read book New Insights on the Structure of the Cascadia Subduction Zone from Amphibious Seismic Data written by Helen A. Janiszewski and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Major findings include that oceanic plate cooling models do not explain the velocities observed beneath the Juan de Fuca plate, that slow velocities in the forearc appear to be more prevalent in areas modeled to have experienced high slip in past Cascadia megathrust earthquakes, and along strike variations in phase velocity reflect variations in arc structure and backarc tectonics.
Book Synopsis Structure of the Subduction System in Southern Peru from Seismic Array Data by : Kristin Eileen Phillips-Alonge
Download or read book Structure of the Subduction System in Southern Peru from Seismic Array Data written by Kristin Eileen Phillips-Alonge and published by . This book was released on 2013 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis High Resolution Earthquake Locations Along the Subduction Zone Between 310S and 350S in Central Chile by : Douglas Alberto Garcia Gonzalez
Download or read book High Resolution Earthquake Locations Along the Subduction Zone Between 310S and 350S in Central Chile written by Douglas Alberto Garcia Gonzalez and published by . This book was released on 1990 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Evolution of the Seismic Structure of the Incoming, Subducting Oceanic Nazca Plate Off South Central Chile by : Eduardo Contreras-Reyes
Download or read book Evolution of the Seismic Structure of the Incoming, Subducting Oceanic Nazca Plate Off South Central Chile written by Eduardo Contreras-Reyes and published by . This book was released on 2008 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Seismic structure of the deep Kurile subduction zone by : Xiao-yang Ding
Download or read book Seismic structure of the deep Kurile subduction zone written by Xiao-yang Ding and published by . This book was released on 1995 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Seismic Structure Around the 660 in Subduction Zone and Its Implication by : Tao Wang
Download or read book Seismic Structure Around the 660 in Subduction Zone and Its Implication written by Tao Wang and published by . This book was released on 2013 with total page 95 pages. Available in PDF, EPUB and Kindle. Book excerpt:
