PPT-Seismic anisotropy and mantle deformation in NW Iran through splitting measurements of

Introduction The present tectonics of Iran has resulted from the continental convergence of the Arabian and Eurasian plates Our study area Fig1 comprises a part of this collision zone and consists of an assemblage of distinct lithospheric . Thermal diffusivity measurements of seven naturally deformed upper mantle rocks were made as a function of pressure up to 1 GPa temperature up to 1250 K and the deformation fabric of the samples For each sample the straininduced crystal preferred or By Paul Delgado. Motivation. Flow. -. Deformation Equations. Discretization. . Operator Splitting. Multiphysics. Coupling. Fixed State. Splitting. Other . Splitting. Conclusions. Outline. (Quasi-Static) . Seismology- lecture 5. Barbara Romanowicz, UC Berkeley. CIDER2012, KITP. Seismological tools. Seismic tomography: surface waves, overtones. Volumetric distribution of heterogeneity. “smooth” structure – depth resolution ~50 km. Seismic velocities – P & S. Relationship to elastic moduli. Seismic anisotropy. . -- directional variation in seismic velocity. Seismic Attenuation – 1/. Q. p. & 1/Q. s. . -- What is seismic attenuation?. Are you planning to visit Iran? Are you wondering It is safe to visit Iran? or Do I need a visa for Iran? And how hard is to get a visa? or even Is it safe for US citizens to visit Iran? There lots of important information to do or not to do in Iran, and on this slides we have listed some of most important tips that you need to know before or during visit Iran. We hope that these tips help you to get the most out of your trip to Iran. Selwyn’s career goal #__: What does the . asthenosphere. have to do with earthquakes, crustal motions, and mantle convection?. Upper crust. Lower crust. Upper mantle. Upper crust. Lower crust. Upper mantle. Miles Osmaston. , Woking, UK.. Why do we need a new and versatile MOR model - THREE reasons . MOR structures change a lot with spreading rate (mm/yr). :-. Fast. (EPR 70-150) - straight axes, orthogonal segmentation, smooth flanks. of the . Moment Tensor. :. M. ij . = M. ji. Now assume the earthquake is a pure double couple, that means there is . no net volume. change, which means . trace must be 0. .. M11 + M22 + M33 = 0. That means independent elements can be represented by 5 independent parameters: . Huaiyu . Yuan. 1,2,3. . , Scott . French. 4. and. . Barbara A. . Romanowicz. 4,5,6. 1. . CCFS, EPS, Macquarie . University, . Australia. 2. . CET, University . of Western Australia, . Australia. Fascinating region due to. rich tectonic history and. abundant data from TA . Isotropic Vs. Fast Craton and its Boundary . wrt. . the western US. Fast . Vs. 100-200 km under Great Plains. Slow Ridges (<100 km). Shear velocity of olivine. Data from . Kumazawa. & Anderson. [1969]. Seismic Anisotropy . Anisotropy of . Polycrystaline. Rocks. Twin Sisters . Dunite. Babuska. , 1972. Deformation and fabric in mantle rocks. 15 Feb 2017. © A.R. Lowry . 2017. Read for . Wed 17 . Feb: . S&W. 62-75 (§2.5). Last time:. . Seismology as Investigative Tool. Deep-Earth . investigations use earthquakes as sources,. three-component broadband seismometers as receivers,. Seismic . Waves. . are shock . waves . given off by earthquakes. . There are 2 types:. 1. . Body Waves. . originate from the . focus. (. F. ). travel . through. . the earth. . They’re used to locate . Seismology- lecture 5. Barbara Romanowicz, UC Berkeley. CIDER2012, KITP. Seismological tools. Seismic tomography: surface waves, overtones. Volumetric distribution of heterogeneity. “smooth” structure – depth resolution ~50 km.