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SCEC Workshop on Establishing a Geologic Framework in Southern California

Conveners: Michael Oskin, Whitney Behr, Liz Hearn, and Wayne Thatcher
Date: June 8-9, 2016
Location: Kellogg West Conference Center, Pomona, CA
SCEC Award: 16183
Attendance: If interested in attending, please complete application (due May 9).

OVERVIEW: Understanding stress conditions within the crust is a key component of physics-based earthquake rupture forecasting. SCEC5 will feature a community rheology model (CRM) that formally links strain rate to stressing rate, and, ultimately, absolute stress state in southern California. A geologic framework, containing lithology and thermal properties, is a necessary constituent of such a model. This workshop will bring together geologists, geophysicists, and geodynamicists to define how a geologic framework for southern California should be constructed. There is a deep body of knowledge of the lithology and lithospheric architecture of southern California, but no comprehensive three-dimensional model yet exists. The workshop will be structured around defining goals for a geologic framework model that can be realistically achieved over SCEC5.

    DAY 1: Full-Day of topical sessions, limited invited presentations, & breakout group discussions.
    DAY 2: Half-Day of writing and discussion for workshop conveners & science contributors.

PARTICIPANTS: Amir Allam (University of Utah), Kali Allison (Stanford University), Tanya Atwater (retired from University of California, Santa Barbara), Nick Beeler (U.S. Geological Survey), Whitney Behr (University of Texas at Austin), Kevin Brown (Scripps Institution of Oceanography), David Chapman (University of Utah (& Kitsilano GeoThinkers)), Michele Cooke (University of Massachusetts Amherst), Andrea Donnellan (NASA Jet Propulsion Laboratory), John Fletcher (CICESE), Heather Ford (University of California, Riverside), Gary Fuis (U.S. Geological Survey), Maggi Glasscoe (NASA Jet Propulsion Laboratory), Ruth Harris (U.S. Geological Survey), Egill Hauksson (California Institute of Technology), Elizabeth Hearn (Capstone Geophysics), Mehran Hosseini (University of Southern California), Tran Huynh (USC/SCEC), Susanne Janecke (Utah State University), Frank Jordan (San Bernardino County), Katherine Kendrick (U.S. Geological Survey), Simon Klemperer (Stanford University), Victoria Langenheim (U.S. Geological Survey), Mark Legg (Legg Geophysical), Jon Marshak (Cal Poly Pomona), Jonathan Matti (U.S. Geological Survey), David Miller (U.S. Geological Survey), Walter Mooney (U.S. Geological Survey), Karl Mueller (University of Colorado, Boulder), Craig Nicholson (University of California, Santa Barbara), Jonathan Nourse (Cal Poly Pomona), Michael Oskin (University of California, Davis), Andreas Plesch (Harvard University), Bob Powell (U.S. Geological Survey), Chris Rollins (California Institute of Technology), Zheng-Kang Shen (University of California, Los Angeles), Joann Stock (California Institute of Technology), Wayne Thatcher (U.S. Geological Survey), Terry Tullis (Brown University), Chris Wills (California Geological Survey), Scott Wipperfurth (University of Maryland-College Park), and Yuehua Zeng (U.S. Geological Survey)

Presentation slides may be downloaded by clicking the title of the presentation. PLEASE NOTE: Files are the author’s property. They may contain unpublished or preliminary information and should only be used while viewing the talk.

JUNE 7, 2016

18:00-20:00 Dinner KWCC Dining Room

JUNE 8, 2016

07:30-08:30 Breakfast KWCC Dining Room
08:30-09:00 Workshop Check-In Valley Vista Room
09:00-09:15 Introduction to workshop and fellow attendees Whitney Behr
09:15-09:30 Motivation of the Community Rheology Model (PDF, 1.9MB) Liz Hearn
09:30-09:45 Essential Elements of a Geologic Framework (PDF, 260.6kB) Mike Oskin
09:45-10:00 Developing and Distributing USR Community Models (PDF, 562.6kB) Andreas Plesch
10:00-11:30 Session I: Constraints from Surface Geology  
  Onshore Geology: Litho-tectonic Provinces of Southern California Jon Matti
  Offshore Geology: Continental Borderland and Paleo-Trench (PDF, 2.8MB) Mark Legg
  Constraints from Palinspastic Reconstruction Bob Powell
  Implications of Large-Magnitude Rotations (PDF, 1.3MB) Craig Nicholson
  Distribution and Emplacement of Pelona-Orocopia Schist Sarah Brownlee
  Lithospheric Structure of the Salton Trough - Gulf of California Joann Stock
11:30-12:15 Lunch  
12:15-12:45 Session II: Crustal constraints from Imaging and Potential Fields  
  Information from Seismic imaging — LARSE and SSIP (PDF, 3.7MB) Gary Fuis
  Information from Potential Fields (PDF, 1.5MB) Vicki Langenheim
12:45-13:30 Session III: Upper Mantle Structure  
  Tomography and basement & upper mantle structure Egill Hauksson
  Mantle lid, delamination, etc. (PDF, 15.2MB) Simon Klemperer
  Rheological constraints from seismic anisotropy (PDF, 2.0MB) Heather Ford
13:30-14:00 Session IV: Faults as Rheological Elements  
  Fault-Zone Structure and Stress State (PDF, 10.9MB) John Fletcher
  Faults in the Mid-Crust and Upper Mantle (PDF, 6.5MB) Whitney Behr
14:00-14:15 Break  
14:15-17:00 Session V: CRM Planning  
14:15-15:50 Breakout Groups (4)  
16:00-16:30 Breakout Group reports  
16:30-17:00 Open discussion / synthesis  
17:00 Adjourn  
18:00-20:00 Dinner KWCC Dining Room

JUNE 9, 2016

07:00-08:30 Breakfast KWCC Dining Room
08:30-13:00 Workshop synthesis, report, and drafting of CRM geologic framework research plan Garden Vista Room
17:00 Adjourn  


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