Upper‐Crustal Shear‐Wave Velocity Structure of the South‐Central Rio Grande Rift above the Socorro Magma Body Imaged with Ambient Noise by the Large‐N Sevilleta Seismic Array

• DOI: 10.1785/0220180074
• Publication Date: 2018-08-08T14:49:26Z
• Authors: N. R. Ranasinghe; L. L. Worthington; C. Jiang; B. Schmandt; T. S. Finlay; S. L. Bilek; R. C. Aster
• Keywords: 01 natural sciences; 0105 earth and related environmental sciences

Research Article| August 08, 2018 Upper‐Crustal Shear‐Wave Velocity Structure of the South‐Central Rio Grande Rift above Socorro Magma Body Imaged with Ambient Noise by Large‐N Sevilleta Seismic Array N. R. Ranasinghe; Ranasinghe aDepartment Earth and Planetary Sciences, University New Mexico, MSCO3‐2040, 1, Albuquerque, Mexico 87131 U.S.A., [e-mail] Search for other works this author on: GSW Google Scholar L. Worthington; Worthington C. Jiang; Jiang B. Schmandt; Schmandt T. S. Finlay; Finlay Bilek; Bilek bDepartment Environmental Institute Mining Technology, 801 Leroy Place, Socorro, 87801 U.S. A. Aster cDepartment Geosciences, Warner College Natural Resources, Colorado State University, 1482, Fort Collins, 80523 U.S.A. Seismological Letters (2018) 89 (5): 1708–1719. https://doi.org/10.1785/0220180074 Article history first online: 08 Aug Cite View This Citation Add to Manager Share Icon Facebook Twitter LinkedIn Email Tools Get Permissions Site Ranasinghe, Worthington, Jiang, Schmandt, Finlay, Bilek, Aster; Array. 2018;; doi: Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search nav input auto suggest filter All ContentBy SocietySeismological Advanced ABSTRACT The Albuquerque–Belen basins reside in central rift partially overlie midcrustal magma body (SMB), inflation which contributes ongoing seismicity localized uplift region. Rayleigh‐wave dispersion measurements extracted from ambient noise cross correlation seismic data collected ∼800 station array southern Albuquerque northern were inverted obtain phase‐velocity maps at 3–7 s. Tomography results indicate large (⁠±6%⁠) lateral variations phase velocities period range. utilizing a nonlinear Monte Carlo Markov chain method 3D S‐wave velocity uppermost 10 km crust. At shallow depths (⁠<5 km⁠), models show low‐velocity (⁠2.90–3.10 km/s⁠) anomalies axis, mainly due Cenozoic sediments, relatively higher (⁠3.20–3.40 local mountain ranges could be older or volcanic rocks. 8–10 depth, relationship is inverted, (⁠3.7–3.85 are generally more present beneath axis than surrounding ranges. We that elevated related (30 12 km) granitic pluton found below sediment cover Consortium Continental Reflection Profiling (COCORP) reflection profiles Abo Pass survey (line 2A). low structural changes moderate‐to‐high‐grade metamorphism rocks upper‐crustal extension part SMB. You do not currently have access article.