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Dissertations / Theses on the topic 'Crustal tomography'

Author: Grafiati

Published: 11 March 2023

Last updated: 31 July 2025

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1

Liu, Kui. "Surface Wave Propagation and Global Crustal Tomography." Diss., Virginia Tech, 2014. http://hdl.handle.net/10919/25428.

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In this thesis, a finite-frequency theory is developed to calculate Born sensitivity kernels for Rayleigh-wave phase and amplitude measurements that are valid in regions near seismic stations. Calculations of sensitivity kernels for inter-station measurements show that exact travelling-wave representation of Green tensor is necessary when station spacing is close to or smaller than the seismic wavelength. This finite-frequency theory will allow us to take advantage of dense seismic arrays to obtain high-resolution surface-wave tomography using inter-station measurements. The non-linear dep

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2

Lynner, Colton, and Robert W. Porritt. "Crustal structure across the eastern North American margin from ambient noise tomography." AMER GEOPHYSICAL UNION, 2017. http://hdl.handle.net/10150/625356.

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Passive tectonic margins, like the eastern North American margin (ENAM), represent the meeting of oceanic and continental material where no active deformation is occurring. The recent ENAM Community Seismic Experiment provides an opportunity to examine the crustal structure across the ENAM owing to the simultaneous deployment of offshore and onshore seismic instrumentation. Using Rayleigh wave phase and group velocities derived from ambient noise data, we invert for shear velocity across the ENAM. We observe a region of transitional crustal thicknesses that connects the oceanic and continental

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3

Villagomez, Diaz Darwin R. 1973. "Crustal and upper mantle structure beneath the Galapagos arechipelago from seismic tomography." Thesis, University of Oregon, 2010. http://hdl.handle.net/1794/11071.

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xv, 151 p. : ill. (some col.) A print copy of this thesis is available through the UO Libraries. Search the library catalog for the location and call number.<br>To explain the origin of several distinct aspects of the Galápagos volcanic hotspot, such as the broad geographical extent of recent volcanism and the unusual pattern of geochemical anomalies, we conducted seismic tomography studies of the upper mantle and crust beneath the Galápagos Archipelago. The studies combine measurements of group and phase velocities of surface waves and delay times of body waves. We find that upper mantle se

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4

Day, Anthony James. "Seismic imaging of crustal structure at mid-ocean ridges : a three-dimensional approach." Thesis, Durham University, 2001. http://etheses.dur.ac.uk/4274/.

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Over recent years geological, geochemical and geophysical surveys of mid-ocean ridges have revealed a significant degree of along-axis variability not only in seabed morphology, but also in crustal structure, particularly Numerous geophysical surveys of the Valu Fa Ridge, southwest Pacific, have mapped the extent of an axial mid-crustal reflector. This reflector has been interpreted as representing the top of a sill-like melt lens, comprising a high percentage of partial melt, lying at the top of a crustal magma chamber. In 1995, a controlled-source, wide-angle seismic dataset was acquired at

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5

Beachly, Matthew William 1986. "The Upper Crustal P-wave Velocity Structure of Newberry Volcano, Central Oregon." Thesis, University of Oregon, 2011. http://hdl.handle.net/1794/11475.

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xii, 98 p. : ill. (some col.)<br>The upper-crustal seismic-velocity structure of Newberry volcano, central Oregon, is imaged using P-wave travel time tomography. The inversion combines a densely-spaced seismic line collected in 2008 with two USGS seismic experiments from the 1980s. A high-velocity ring (7 km EW by 5 km NS) beneath the inner caldera faults suggests an intrusive ring complex 200 to 500 m thick. Within this ring shallow low velocities (<2 km depth) are interpreted as caldera fill and a subsided block. High velocities below 2 km depth could be intrusive complexes. There appears to

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6

White, Donald John. "Shallow crustal structure beneath the Juan de Fuca ridge from 2[sup D] seismic refraction tomography." Thesis, University of British Columbia, 1989. http://hdl.handle.net/2429/29317.

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The formation of oceanic lithosphere along ocean ridges, and the role that crustal magma chambers play in the accretionary process, continue to be fundamental issues in plate tectonics. To address these issues, a multi-receiver airgun/ocean bottom seismograph refraction line, designed to allow definition of lateral velocity and attenuation variations within the shallow crust, was shot across the Endeavour segment of the Juan de Fuca Ridge near 48° N, 129° W. A tomographic inversion procedure has been developed to invert the first arrival travel times and amplitudes from this profile for 2[sup

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7

Van, Avendonk Hermanus Josephus Antonius. "An investigation of the crustal structure of the Clipperton transform fault area using 3D seismic tomography /." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 1998. http://wwwlib.umi.com/cr/ucsd/fullcit?p9823314.

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8

Delph, Jonathan, and Jonathan Delph. "Crustal and Upper Mantle Structure of the Anatolian Plate: Imaging the Effects of Subduction Termination and Continental Collision with Seismic Techniques." Diss., The University of Arizona, 2016. http://hdl.handle.net/10150/622908.

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The neotectonic evolution of the eastern Mediterranean is intimately tied to interactions between the underthrusting/subducting slab along the southern margin of Anatolia and the overriding plate. The lateral variations in the subduction zone can be viewed as a temporal analogue of the transition between continuous subduction and subduction termination by continent-continent collision. By investigating the lateral variations along this subduction zone in the overriding plate, we can gain insight into the processes that precede continent collision. This dissertation summarizes the results of th

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9

Kashubin, Artem. "Seismic Studies of Paleozoic Orogens in SW Iberia and the Middle Urals." Doctoral thesis, Uppsala universitet, Geofysik, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-9405.

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Controlled source seismic methods were employed in this study to investigate the reflectivity and velocity structure of two Hercynian orogens – the Uralides and Variscides. Conventional common depth point (CDP) sections from five reflection seismic campaigns and a velocity model obtained from tomographic inversion of wide-angle observations were the main datasets studied from the Middle Urals. These were complemented with the near-vertical seismic sections and velocity models from the Southern Urals. In the Variscides, conventional CDP processing, along with non-standard processing and synthet

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10

Hardwick, Anthony James. "New insights into the crustal structure of the England, Wales and Irish Seas areas from local earthquake tomography and associated seismological studies." Thesis, University of Leicester, 2009. http://hdl.handle.net/2381/8615.

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For the past three decades, deep crustal studies of the British Isles have been restricted to the interpretation of 2-D seismic reflection and refraction profiles, mostly acquired offshore. During this period, the British Geological Survey (BGS) seismic monitoring network has developed to an unrivalled density for a region of low intraplate seismicity. In an average year, the modern network records approximately 40 earthquakes in the crust beneath the British Isles with local magnitudes > 2. Statistical tests show the modern and historical pattern is not random. Understanding of the tectonic p

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11

Tiberi, Lara. "Tomografia crostale della Pianura Padana e calibrazione di procedure di localizzazione." Doctoral thesis, Università degli studi di Trieste, 2014. http://hdl.handle.net/10077/10125.

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2012/2013<br>I terremoti costituiscono un disastro naturale ricorrente su tutto il territorio italiano e per questo sono estremamente importanti interventi mirati e rapidi di protezione civile. La rapidità di questi interventi dipende dalla produzione di localizzazioni veloci e possibilmente in tempo reale degli eventi sismici. La precisione delle localizzazioni, inoltre, è necessaria per identificare le faglie sismogenetiche. Per questi due aspetti, è necessario un miglioramento dei sistemi di monitoraggio esistenti in modo da poter accrescere la qualità delle localizzazioni automatiche in t

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12

Han, Liang. "Seismic imaging and thermal modeling of active continental rifting processes in the Salton Trough, Southern California." Diss., Virginia Tech, 2016. http://hdl.handle.net/10919/78906.

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Continental rifting ultimately creates a deep accommodation space for sediment. When a major river flows into a late-stage rift, thick deltaic sediment can change the thermal regime and alter the mechanisms of extension and continental breakup. The Salton Trough, the northernmost rift segment of the Gulf of California plate boundary, has experienced the same extension as the rest of the Gulf, but is filled to sea level by sediment from the Colorado River. Unlike the southern Gulf, seafloor spreading has not initiated. Instead, seismicity, high heat flow, and minor volcanoes attest to ongoing r

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13

Mihoubi, Abdelhafid. "Imagerie sismique de la structure profonde de la marge Algérienne orientale (secteur de Jijel) : implications en terme de potentiel pétrolier." Thesis, Brest, 2014. http://www.theses.fr/2014BRES0037/document.

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Cette thèse a été conduite dans le cadre du programme de coopération de recherche Algéro-française SPIRAL (Sismique Profonde et Investigations Régionales du Nord de l’Algérie). Ce projet vise à étudier la structure profonde de la marge algérienne par une approche combinée des techniques sismiques ; grand-angle et multi-canal. Le domaine couvert par la présente étude se concentre dans la région de Jijel dans la marge algérienne orientale. L’objectif principal de notre thèse est d'améliorer en profondeur l'imagerie de la marge algérienne en utilisant une combinaison de données sismiques grand-an

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Mihoubi, Abdelhafid. "Imagerie sismique de la structure profonde de la marge Algérienne orientale (secteur de Jijel) : implications en terme de potentiel pétrolier." Electronic Thesis or Diss., Brest, 2014. http://www.theses.fr/2014BRES0037.

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Cette thèse a été conduite dans le cadre du programme de coopération de recherche Algéro-française SPIRAL (Sismique Profonde et Investigations Régionales du Nord de l’Algérie). Ce projet vise à étudier la structure profonde de la marge algérienne par une approche combinée des techniques sismiques ; grand-angle et multi-canal. Le domaine couvert par la présente étude se concentre dans la région de Jijel dans la marge algérienne orientale. L’objectif principal de notre thèse est d'améliorer en profondeur l'imagerie de la marge algérienne en utilisant une combinaison de données sismiques grand-an

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15

Bazin, Sara. "Three-dimensional crustal structure of East Pacific rise discontinuities from tomographic inversions /." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2000. http://wwwlib.umi.com/cr/ucsd/fullcit?p3035403.

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16

Araujo, Sebastián. "Travel time tomography of the crust and the mantle beneath Ecuador from data of the national seismic network." Thesis, Université Grenoble Alpes (ComUE), 2016. http://www.theses.fr/2016GREAU015/document.

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Bien que de nombreuses études géodynamiques et tectoniques aient été effectuées à partir l'activité sismique en Equateur, il n'existait pas à ce jour une tomographie complète utilisant l'ensemble des données du réseau sismologique Equatorien (RENSIG), mise à part une étude prélimaire sur la partie centrale de l'Equateur menée en 1994 par Prévot et coll. et de plusieurs profils sismiques déterminés à la suite des campagnes marines SALIERI et SISTEUR. Inverser les centaines de millier de temps d'arrivées d'ondes P et S, de qualité inégale, formant le catalogue RENSIG était le défi qu'a constitué

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17

Macquet, Marie. "Tomographie crustale des Pyrénées et des régions avoisinantes par corrélation de bruit." Thesis, Grenoble, 2014. http://www.theses.fr/2014GRENU037/document.

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Durant cette thèse, nous appliquons la méthode de la corrélation de bruit ambiant dans la région particulièrement hétérogène des Pyrénées et des ses alentours (socle rocheux affleurant et bassin sédimentaires épais). Le jeu de données utilisé est une combinaison de deux réseaux temporaires large-bande français et espagnol (PYROPE et IBERARRAY) et de stations des réseaux permanents large-bande français et catalan. Le bruit sismique, enregistré pendant un an par les 158 stations est utilisé pour calculer les corrélations dans la gamme de période 5-55 s. Les vitesses de groupe de l'onde de Raylei

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18

Lecomte, Isabelle. "Structure crustale d'une dorsale lente : tomographie sismique 3D sur la dorsale de Mohn (72°20N, 1°30E)." Université Louis Pasteur (Strasbourg) (1971-2008), 1990. http://www.theses.fr/1990STR1A003.

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19

Huang, Hui Ph D. Massachusetts Institute of Technology. "Ambient noise tomography for wavespeed and anisotropy in the crust of southwestern China." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/87518.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Earth, Atmospheric, and Planetary Sciences, 2014.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references.<br>The primary objective of this thesis is to improve our understanding of the crustal structure and deformation in the southeastern Tibetan Plateau and adjacent regions using surface wave tomography. Green's functions for Rayleigh and Love waves are extracted from ambient noise interferometry. Using the Green's functions, we first conduct traditional traveltime tomography for the two shear wavesp

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20

Saygin, Erdinc, and erdinc saygin@anu edu au. "Seismic Receiver and Noise Correlation Based Studies in Australia." The Australian National University. Research School of Earth Sciences, 2007. http://thesis.anu.edu.au./public/adt-ANU20091009.115242.

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This thesis is directed at exploiting information in the coda of seismic phases and the ambient noise field to provide new constraints on the structure of the Australian Continent. ¶ The exploitation of the immediate coda following the onset of P waves from a distant earthquake using radial receiver functions is now a well established method. The 40 sec interval following P contains reverberations and conversions, by deconvolving the radial component trace with the vertical components, the conversions are emphasized by canceling the part of the response that are common to both components. A m

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21

Wagner, Diana [Verfasser]. "Tomographic investigation of the crust of Central Java, Indonesia / Diana Wagner." Kiel : Universitätsbibliothek Kiel, 2008. http://d-nb.info/1019754621/34.

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22

Sun, Youshun 1970. "P- and S- wave tomography of the crust and uppermost mantle in China and surrounding areas." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/33172.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 2005.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Includes bibliographical references.<br>This thesis involves inverting the seismic structure of the crust and uppermost mantle in China from the P- and S-wave travel-time tomography. The main contributions of this research are: 1) introducing the adaptive moving window method to obtain 2338 1D P and S models in China; 2) introduci

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23

Hubans, Fabien. "Utilisation des corrélations de bruit micro-sismique pour l'analyse des propriétés du champ d'onde et l'imagerie crustale." Phd thesis, Grenoble, 2010. http://tel.archives-ouvertes.fr/tel-00564324.

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Depuis 10 ans, l'imagerie de la croûte par corrélations de bruit a été utilisée dans différentes régions. Ces études sélectionnent les corrélations sur la base du rapport signal sur bruit des signaux utilisés. Selon la théorie, les corrélations convergent vers les fonctions de Green en temps positif et négatif si la distribution des sources est homogène. Seule la vérification de la parité des corrélations permet d'évaluer la qualité de la convergence. Un écart à la parité fournit des informations sur la synchronisation des horloges des stations et la distribution des sources de bruit. Ainsi, l

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24

Gans, Christine. "Investigations of the Crust and Upper Mantle of Modern and Ancient Subduction Zones, using Pn Tomography and Seismic Receiver Functions." Diss., The University of Arizona, 2011. http://hdl.handle.net/10150/145719.

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Advances in seismology allow us to obtain "high-resolution" images of the Earth's subsurface. This dissertation summarizes the results of three seismic studies on three different continents, with the aim of better understanding the crust and upper mantle structure of seemingly disparate yet ultimately related regions. The seismic techniques of Pn tomography and P-wave receiver function (RF) analysis are applied to central Turkey (Pn tomography), western Argentina and southwestern Wyoming, USA (RF analysis). These studies look at both a present-day convergent margin (Andean subduction zone,

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Olsson, Sverker. "Analyses of Seismic Wave Conversion in the Crust and Upper Mantle beneath the Baltic Shield." Doctoral thesis, Uppsala University, Department of Earth Sciences, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-7930.

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<p>Teleseismic data recorded by broad-band seismic stations in the Swedish National Seismic Network (SNSN) have been used in a suite of studies of seismic wave conversion in order to assess the structure of the crust and upper mantle beneath the Baltic Shield. Signals of seismic waves converted between P and S at seismic discontinuities within the Earth carry information on the velocity contrast at the converting interface, on the depth of conversion and on P and S velocities above this depth. </p><p>The conversion from P to S at the crust-mantle boundary (the Moho) provides a robust tool to c

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Ligdas, Constantina Nadia. "P-wave velocities in the crust and upper mantle of the Aegean area by tomographic inversion." Thesis, University of Reading, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.276207.

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27

GUMIAUX, Charles. "Modélisation du cisaillement hercynien de Bretagne centrale : déformation crustale et implications lithosphériques." Phd thesis, Université Rennes 1, 2003. http://tel.archives-ouvertes.fr/tel-00003938.

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Le Massif Armoricain est situé dans la syntaxe Ibéro-Armoricaine, à l'extrémité Ouest de la chaîne hercynienne d'Europe. Cette structure arquée se referme pendant toute l'histoire de la collision continentale jusqu'au cours du Carbonifère, et de grands décrochements se forment à travers ces domaines. Deux de ces grands décrochements, le Cisaillement Nord Armoricain et le Cisaillement Sud Armoricain, délimitent un domaine supra-crustal peu épaissi au cours de l'orogenèse hercynienne : la Bretagne Centrale. La partie orientale de ce domaine présente tous les caractères d'une zone de cisaillement

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28

Marot, Marianne. "Zones de subduction horizontale versus normale : une comparaison basée sur la tomographie sismique en 3-D et de la modélisation pétrologique de la lithosphère continentale du Chili Central et d’Ouest de l’Argentine (29°S-35°S)." Thesis, Nice, 2013. http://www.theses.fr/2013NICE4046/document.

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Sous le Chili central et l’ouest de l'Argentine (29°-35°S), la plaque océanique Nazca, en subduction sous la plaque continentale Amérique du Sud, change radicalement de géométrie : inclinée à 30°, puis horizontale, engendrée par la subduction de la chaine de volcans de Juan Fernandez. Le but de mon étude est d'évaluer, la variation de nature et de propriétés physiques de la lithosphère chevauchante entre ces deux régions afin de mieux comprendre (1) sa structure profonde et (2) les liens entre les déformations observées en surface et en profondeur. Pour répondre à cette thématique, j’utilise u

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Silvennoinen, H. (Hanna). "3D structure of the crust and upper mantle beneath Northern Fennoscandian shield." Doctoral thesis, University of Oulu, 2015. http://urn.fi/urn:isbn:9789526210681.

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Abstract The crustal and upper mantle structures of the Shield on the regional scale were investigated using the data of the POLENET/LAPNET passive seismic array and the previously published models of active and passive seismic experiments in the study area. This area is centred in northern Finland and it extends to surrounding areas in Sweden, Norway and northwestern Russia. The bedrock there is mostly of the Archaean origin and the lithosphere of the region was reworked by two orogenies during Palaeoproterozoic. One of the results of the thesis was a new map of the Moho depth of the study ar

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Nunn, Ceri. "Tomographic images of the crust and upper mantle beneath the Tibetan Plateau : using body waves, surface waves and a joint inversion." Thesis, University of Cambridge, 2014. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.708398.

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Bouchet, Bert Manoz Romain. "Structure de la lithosphère continentale de l'Ouest USA : contribution des isotopes du Plomb,du Néodyme, et de l'Hafnium." Phd thesis, Ecole normale supérieure de lyon - ENS LYON, 2014. http://tel.archives-ouvertes.fr/tel-01066021.

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La lithosphère continentale est physiquement et chimiquement segmentée. La cartographie des isotopes radiogéniques de roches plutoniques acides, représentatives de la croûte continentale, et de laves basiques, représentatives du manteau, possède des similarités avec la cartographie sismique de la lithosphère sous-jacente. Ces similitudes permettent d'interpréter les observations sismiques en étudiant leurs caractéristiques chimiques et leur âge. Les isotopes du plomb permettent de dater et d'identifier l'empilement de segments crustaux qui forment la croûte. L'écart des âges modèles du plomb a

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Montagner, Jean-Paul. "Etude de la structure profonde de la terre a partir des ondes de surface de longue periode." Paris 6, 1986. http://www.theses.fr/1986PA066188.

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Differentes methodes d'inversion de la vitesse de ces ondes sont appliquees a plusieurs regions du globe: ocean pacifique, afrique, ocean indien. La regionalisation suivant l'age du fond oceanique montre que des heterogeneites laterales de vitesse existent jusqu'a au moins 400 km de profondeur et que la correlation entre la tectonique de surface et la structure profonde est meilleure sous l'ocean pacifique que sous l'ocean indien

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Guilbert, Jocelyn. "Caractérisation des structures lithosphériques sous le Nord Tibet et sous le Massif Central à partir des données sismologiques du programme Lithoscope." Phd thesis, Grenoble 1, 1995. http://www.theses.fr/1995GRE10227.

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L'etude des donnees lithoscope permet d'etudier les structures profondes de la lithosphere. Trois methodes ont ete developpees. La premiere porte sur l'analyse des ondes converties a l'interface croute-manteau afin de contraindre les variations d'epaisseur de croute. La seconde methode caracterise l'orientation des structures dans le manteau, par la mesure de l'anisotropie des ondes s. La troisieme methode mesure l'attenuation des milieux echantillonnes a l'aide de deux methodes d'analyse frequentielle et temporelle. Ces trois methodes ont ete appliquees aux enregistrements provenant du nord t

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Guilbert, Jocelyn. "Caractérisation des structures lithosphériques sous le Nord Tibet et sous le Massif Central à partir des données sismologiques du programme Lithoscope." Phd thesis, Université Joseph Fourier (Grenoble), 1995. http://tel.archives-ouvertes.fr/tel-00721900.

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L'étude des données Lithoscope permet d'étudier les structures profondes de la lithosphère. Trois méthodes ont été développées. La première porte sur l'analyse des ondes converties à l'interface croûte-manteau afin de contraindre les variations d'épaisseur de croûte. La seconde méthode caractérise l'orientation des structures dans le manteau, par la rnesure de l'anisotropie des ondes S. La troisième méthode mesure l'atténuation des milieux échantillonnés à l'aide de deux méthodes d'analyse fréquentielle et temporelle. Ces trois méthodes ont été appliquées aux enregistrements provenant du Nord

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Dash, Ranjan Kumar. "Crustal structure and marine gas hydrate studies near Vancouver Island using seismic tomography." Thesis, 2007. http://hdl.handle.net/1828/2498.

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This dissertation work applies seismic tomographic inversion methods to two different datasets - one to address the earthquake hazard within the Strait of Georgia and the other to estimate hydrate concentration and distribution in the continental slope off Vancouver Island. In the first part of the study, seismic refraction/wide-angle reflection data from onshore-offshore experiments in 1998 and 2002 were inverted for a smooth three-dimensional (3D) velocity structure down to depths of 6-7 km beneath the Strait of Georgia, a seismically active region where an earthquake swarm (with magnitude u

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Cheng, Ching-Yu, and 鄭璟郁. "3-D Shear Wave Shallow Crustal Structures at Meishan Fault Zone using Ambient Noise Tomography." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/fjq945.

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碩士<br>國立中央大學<br>地球科學學系<br>105<br>1906 Ｍ7.1 Meishan earthquake occurred near Chiayi city in southwestern Taiwan and resulted in more than three thousands casualties and six thousands of buildings collapsed. Based on the geological survey, the Meishan fault zone a right-lateral strike-slip fault with a length of 25 kilometers, was the main contributor for this event. In previous studies, many researchers have done lot of investigation about the Meishan Fault zone, including geologic researches at surface and seismic explorations at shallow crust. However, there is still limited information about

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Stephenson, Andrew. "Crustal velocity structure of the Southern Nechako Basin, British Columbia, from wide-angle seismic traveltime inversion." Thesis, 2010. http://hdl.handle.net/1828/3145.

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In the BATHOLITHSonland seismic project, a refraction - wide-angle reflection survey was shot in 2009 across the Coast Mountains and Interior Plateau of central British Columbia. Part of the seismic profile crossed the Nechako Basin, a Jurassic-Cretaceous basin with potential for hydrocarbons within sedimentary rocks that underlie widespread volcanics. Along this 205-km-long line segment, eight explosive shots averaging 750 kg were fired and recorded on 980 seismometers. Forward and inverse modelling of the traveltime data were conducted with two independent methods: ray-tracing based mode

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Cheng, I.-Hsiu, and 鄭亦修. "3-D Multi-scale Finite-frequency Ambient Noise Rayleigh Wave Tomography of Crustal S-Wave Velocity Structure beneath Central Tibet." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/70487862466898554989.

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碩士<br>國立臺灣大學<br>地質科學研究所<br>101<br>Surface wave travel-time tomography has been widely used as a powerful strategy to image shear wave velocity structure of the Earth’s crust and upper mantle. Traditionally with either ray theoretical great-circle approximations or 2-D phase kernels, phase velocity maps are first obtained at multiple frequencies. They are then combined to invert for shear wave velocity structure using 1-D depth-varying Frechet derivatives of phase velocity with respect to shear wave speed. Such approach runs short on considering the directional- and depth-dependence of scatteri

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Darlington, Andrea. "Geophysical constraints on mantle viscosity and its influence on Antarctic glacial isostatic adjustment." Thesis, 2012. http://hdl.handle.net/1828/4001.

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Glacial isostatic adjustment (GIA) is the process by which the solid Earth responds to past and present-day changes in glaciers, ice caps, and ice sheets. This thesis focuses on vertical crustal motion of the Earth caused by GIA, which is influenced by several factors including lithosphere thickness, mantle viscosity profile, and changes to the thickness and extent of surface ice. The viscosity of the mantle beneath Antarctica is a poorly constrained quantity due to the rarity of relative sea-level and heat flow observations. Other methods for obtaining a better-constrained mantle viscosity

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Humphreys, Eugene Drake. "Studies of the crust-mantle system beneath Southern California." Thesis, 1985. http://catalog.hathitrust.org/api/volumes/oclc/30757542.html.

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Saygin, Erdinc. "Seismic Receiver and Noise Correlation Based Studies in Australia." Phd thesis, 2007. http://hdl.handle.net/1885/49353.

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This thesis is directed at exploiting information in the coda of seismic phases and the ambient noise field to provide new constraints on the structure of the Australian Continent. ¶ The exploitation of the immediate coda following the onset of P waves from a distant earthquake using radial receiver functions is now a well established method. The 40 sec interval following P contains reverberations and conversions, by deconvolving the radial component trace with the vertical components, the conversions are emphasized by canceling the part of the response that are common to both components. A me

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Chen, Kai-Xun, and 陳凱勛. "High-resolution 3-D Shear Wave Upper-crust Structures in Ilan Plain using Ambient Noise Tomography." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/09267432428593408826.

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碩士<br>國立中央大學<br>地球科學學系<br>103<br>The Ilan Plain (IP) in NE Taiwan locates on the western end of the Okinawa trough and exhibits high geothermal gradients with abundant hot springs, likely resulting from magmatism associated with the back-arc spreading as manifested by the offshore volcanic island (Kueishantao)(Tong et al., 2008). North and south sides of IP are divided by Lan-Yang River with distinctive characteristics. Comparing to the northern part, the southern part exhibits, relatively, thin unconsolidated Quaternary alluvium layer with depths ranging from 0 to 1 km (Chiang, 1976), high on

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Liu, Kaijian. "Teleseismic Imaging of the Crust and Upper Mantle in the Western United States." Thesis, 2012. http://hdl.handle.net/1911/64700.

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High-resolution seismic images of lithospheric structures allow us to infer the tectonics that modified the lithosphere. We apply such methods to understand Cenozoic modification of the lithosphere by tectonic and magmatic processes in the tectonically active western United States. Using USArray Transportable and Flexible Array data, we present high-resolution images for three regions in this thesis. (1) In the Mendocino triple junction, we use a joint inversion of Rayleigh-wave dispersion data and receiver functions to obtain a new crust and upper Vs model to ~150km depth. The model shows fou

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Pilia, Simone. "3-D tomographic imaging of the Southeast Australian crust : new insight into the evolution of the east Gondwana margin." Phd thesis, 2014. http://hdl.handle.net/1885/156207.

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Seismic tomography is arguably the most powerful geophysical method for imaging the Earth's interior. From its origins in the early 1970s, rapid growth in computing power, increased availability of high quality digital data, and ongoing technique development have all conspired to propel it to a stage where images of unprecedented detail are now produced on a regular basis. In this thesis, cutting edge seismic tomography methods will be used to image 3-D crustal structure in southeast Australia, with the aim of better understanding the tectonic evolution of the former east Gondwana margin. A ke

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KAVIANI, Ayoub. "La chaîn de collision continentale du Zagros (Iran): Structure lithosphérique par analyse de données sismologique." Phd thesis, 2004. http://tel.archives-ouvertes.fr/tel-00006897.

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La chaîne du Zagros située sur la marge septentrionale de la plaque Arabie, est l'une des plus jeunes chaînes de collision continentale. Elle a été structurée par la collision de la plaque Arabie avec le microcontinent d'Iran central. Une expérience sismologique, appelée « Zagros 2000-2001 », a été réalisée dans le cadre d'une collaboration entre le LGIT et l'IIEES pour étudier la structure lithosphérique sous cette chaîne de collision et une partie du bloc d'Iran Central. Le jeu de données de cette expérience nous a permis de caractériser la structure de la croûte et du manteau lithosphérique

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Karousová, Hana. "Teleseismická tomografie svrchního pláště pod Českým masívem." Doctoral thesis, 2014. http://www.nusl.cz/ntk/nusl-328174.

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Passive seismic experiments, MOSAIC, BOHEMA I-III, EgerRift, or, PASSEQ, carried out in the region of the Bohemian Massif (BM), allowed a detailed study of velocity structure of the upper mantle. We present results of tomography studies of the upper mantle beneath the north-eastern and southern parts of the BM based on the data from the BOHEMA II and BOHEMA III experiments (2004-2006). Despite the fact that regions with the highest resolution of velocity perturbations differ in the models, tomography images are similar in overlapping parts. Models of the upper mantle show mostly low- velocity

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Kolínský, Petr. "Analýza a inverze povrchových vln - aplikace na Český masiv." Doctoral thesis, 2010. http://www.nusl.cz/ntk/nusl-296110.

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title: Surface Wave Analysis and Inversion Application to the Bohemian Massif author: Mgr. Petr Kolínský, DiS. author's e-mail address: kolinsky@irsm.cas.cz departments: Department of Geophysics Faculty of Mathematics and Physics Charles University Prague V Holešovičkách 2, Praha 8 - 180 00, Czech Republic and Department of Seismology Institute of Rock Structure and Mechanics, v.v.i. Academy of Sciences of the Czech Republic V Holešovičkách 41, Praha 8 - 182 09, Czech Republic supervisor: RNDr. Johana Brokešová, CSc. supervisor's e-mail address: johana.brokesova@mff.cuni.cz consultant: RNDr. J

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