GEON Research Objectives J.S. Oldow, University of Idaho

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GEON Research ObjectivesJ.S. Oldow, University
of Idaho

• 1. Kinematic model for Northern Rocky Mtns,
  Cascadia, northern Great Basin, and northern
  Sierra Nevada (0 to 15 Ma)
• 2. 3-D crustal and lithospheric architecture
• 3. Role of structural inheritance in nucleation
  and evolution of late Cenozoic structures
• 4. Address Regional Tectonic Questions
• - western expression of northern end of
  Intermountain Seismic Belt
• - northern termination of Great Basin
  extensional system
• - origin and tectonic history of Owyhee
  Plateau
• - kinematic characterization of
  transition between contraction and
  extension within Inland Northwest
• - role of Snake River Plain in
  differential Eocene/Miocene extension
• 5. Develop ground-based LIDAR acquisition,
  visualization, and analysis methods

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Northern Rocky Mountains

• Data Compilation (at or near completion)
• - 90 m topography (30 and 10 m as needed)
• - ANSS and NEIC seismicity focal
  mechanisms
• - GPS velocity field
• - Moho depth (SW Canada N Rocky Mtns)
• - Decollement systems (Jurassic-Eocene)
• - Tectonic domains (0-15 Ma)
• - Local GIS development
• - New gravity database
• Data Compilation (in progress)
• - Active fault map
• - Paleo-strain rate tensor maps
• - State geologic maps
• - Isotopic boundaries
• - Magnetics and heat flow

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Northern Rocky Mountains

• Methods
• - focused student thesis projects (8
  graduate students)
• - regional reconstruction via
  class/research setting
• - team discussion of data organization and
  access
• - GIS development in Arc 8.3
• - identify primary tectonic domain
  boundaries
• - retrodeformable maps (using Arc 8.3
  tools) based on geologic input
• Products
• - Map restoration and kinematically
  compatible forward model
• - website with data and sources (tutorial
  and readme files)
• - publication of results (if minimum
  requirements achieved)

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Northern Rocky Mountains

• Case Study
• - integrate geospatially registered datasets
  (GIS)
• - develop time-integrated kinematic model (0
  to 9 Ma)
• - produce testable hypotheses to guide data
  acquisition/compilation
• - provide basic data compilations for
  community consumption

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TRANSITION FROM ACTIVE BASIN AND RANGE EXTENSION
TO CONTRACTION AND BLOCK ROTATION, BLUE
MOUNTAINS, NORTHEAST OREGON, SOUTHEAST
WASHINGTON, AND WESTERN IDAHO

• John S. Oldow and Thomas E. Jones
• Geological Sciences
• University of Idaho
• Moscow, Idaho

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