ORCID Profile
0000-0002-5656-4564
Current Organisation
The University of Texas at Austin
Does something not look right? The information on this page has been harvested from data sources that may not be up to date. We continue to work with information providers to improve coverage and quality. To report an issue, use the Feedback Form.
Publisher: Seismological Society of America (SSA)
Date: 07-09-2016
DOI: 10.1785/0220160124
Publisher: Elsevier BV
Date: 08-2013
Publisher: American Geophysical Union (AGU)
Date: 11-2021
DOI: 10.1029/2021GC010099
Abstract: The style of convective force transmission to plates and strain‐localization within and underneath plate boundaries remain debated. To address some of the related issues, we analyze a range of deformation indicators in southern California from the surface to the asthenosphere. Present‐day surface strain rates can be inferred from geodesy. At seismogenic crustal depths, stress can be inferred from focal mechanisms and splitting of shear waves from local earthquakes via crack‐dependent seismic velocities. At greater depths, constraints on rock fabrics are obtained from receiver function anisotropy, P n and P tomography, surface wave tomography, and splitting of SKS and other teleseismic core phases. We construct a synthesis of deformation‐related observations focusing on quantitative comparisons of deformation style. We find consistency with roughly N‐S compression and E‐W extension near the surface and in the asthenospheric mantle. However, all lithospheric anisotropy indicators show deviations from this pattern. P n fast axes and dipping foliations from receiver functions are fault‐parallel with no localization to fault traces and match post‐Farallon block rotations in the Western Transverse Ranges. Local shear wave splitting orientations deviate from the stress orientations inferred from focal mechanisms in significant portions of the area. We interpret these observations as an indication that lithospheric fabric, developed during Farallon subduction and subsequent extension, has not been completely reset by present‐day transform motion and may influence the current deformation behavior. This provides a new perspective on the timescales of deformation memory and lithosphere‐asthenosphere interactions.
Publisher: Springer Science and Business Media LLC
Date: 19-08-2012
DOI: 10.1038/NGEO1553
Publisher: American Geophysical Union (AGU)
Date: 04-2022
DOI: 10.1029/2022AV000716
Abstract: The editorial board of AGU Advances thanks the in iduals who reviewed for the journal in 2021.
Publisher: American Geophysical Union (AGU)
Date: 03-2021
DOI: 10.1029/2021AV000426
Abstract: The editors thank the 2020 peer reviewers
Publisher: Geological Society of America
Date: 05-02-2021
DOI: 10.1130/G48246.1
Abstract: From west to east along the Sunda-Banda arc, convergence of the Indo-Australian plate transitions from subduction of oceanic lithosphere to arc-continent collision. This region of eastern Indonesia and Timor-Leste provides an opportunity for unraveling the processes that occur during collision between a continent and a volcanic arc, and it can be viewed as the temporal transition of this process along strike. We collected a range of complementary geological and geophysical data to place constraints on the geometry and history of arc-continent collision. Utilizing ∼4 yr of new broadband seismic data, we imaged the structure of the crust through the uppermost mantle. Ambient noise tomography shows velocity anomalies along strike and across the arc that are attributed to the inherited structure of the incoming and colliding Australian plate. The pattern of anomalies at depth resembles the system of salients and embayments that is present offshore western Australia, which formed during rifting of east Gondwana. Previously identified changes in geochemistry of volcanics from Pb isotope anomalies from the inner arc islands correlate with newly identified velocity structures representing the underthrusted and subducted Indo-Australian plate. Reconstruction of uplift from river profiles from the outer arc islands suggests rapid uplift at the ends of the islands of Timor and western Sumba, which coincide with the edges of the volcanic-margin protrusions as inferred from the tomography. These findings suggest that the tectonic evolution of this region is defined by inherited structure of the Gondwana rifted continental margin of the incoming plate. Therefore, the initial template of plate structure controls orogenesis.
Publisher: American Geophysical Union (AGU)
Date: 04-2012
DOI: 10.1029/2011JB008943
Publisher: American Geophysical Union (AGU)
Date: 06-2023
DOI: 10.1029/2023AV000974
Abstract: The editorial board of AGU Advances thanks the in iduals who reviewed for the journal in 2022.
Publisher: Elsevier BV
Date: 12-2014
Publisher: Springer Science and Business Media LLC
Date: 25-05-2021
Publisher: American Geophysical Union (AGU)
Date: 20-04-2020
DOI: 10.1029/2020AV000181
Publisher: Geological Society of America
Date: 22-11-2013
DOI: 10.1130/G34959.1
Publisher: American Geophysical Union (AGU)
Date: 03-2021
DOI: 10.1029/2020AV000296
Abstract: As in iduals serving on the AGU Advances editorial board, we condemn racism, affirm that Black Lives Matter, and recognize that inequality is built into the systems that have allowed us to prosper. We aim to persistently foster discussion about racism, inequity, and the need to make our community more erse and inclusive. This will help AGU Advances do a better job in publishing important science that inclusively reflects the ideas and contributions of all in our community.
Publisher: Wiley
Date: 19-08-2021
Publisher: California Digital Library (CDL)
Date: 15-07-2022
DOI: 10.31223/X5SQ0S
Abstract: Whether mechanical anisotropy is required to explain the dynamics of the lithosphere, in particular near fault zones where it may affect loading stresses, is an important yet open question. If anisotropy affects deformation, how can we quantify its role from observations? Here, we derive analytical solutions and build a theoretical framework to explore how a shear zone with anisotropic viscosity can lead to deviatoric stress heterogeneity as well as non-coaxial principal stress and strain rates. We also develop an open-source finite element approach to explore more complex scenarios in both 2-D and 3-D, and simulate three 3-D scenarios inspired by an anisotropic major strike-slip fault zone, the asthenospheric mantle, and the Leech River Schist above the Cascadia subduction zone. Our findings and new tools may help geoscientists to better understand, detect, and evaluate mechanical anisotropy in natural settings, with potential implications including the transfer of lithospheric stress and deformation including fault loading.
Publisher: American Geophysical Union (AGU)
Date: 04-2012
DOI: 10.1029/2011GC003934
Publisher: American Geophysical Union (AGU)
Date: 24-11-2014
DOI: 10.1002/2014GL061884
Publisher: American Geophysical Union (AGU)
Date: 08-2013
DOI: 10.1002/JGRB.50309
Publisher: Elsevier BV
Date: 09-2014
Publisher: American Geophysical Union (AGU)
Date: 11-08-2014
DOI: 10.1002/2013RG000444
Location: United States of America
No related grants have been discovered for Thorsten Becker.