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          Continental Dynamics Program

 


 

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Understanding the Causes of
Continental Intraplate Tectonomagmatism:
A Case Study in the Pacific Northwest

Final Project Workshop in Bend

 

 

 

 

 

 

Over 30 people participated in the final project workshop held in Bend from September 12-15. The group, housed at the Sunriver complex, discussed the results from the project and developed an outline for over 25 chapters describing the results of the project.  The outline will serve as the basis for a compendium of papers to be published as a virtual monograph in either a GSA or AGU journal. 

Presentations from the workshop will be posted to the "Publications and Presentations" page of the HLP webpage in the coming weeks.

 
The Project

This project is being funded by the Continental Dynamics Program of the National Science Foundation's Earth Sciences Division. Collaborators on the project include scientists from the Carnegie Institution of Washington; Arizona State University; Miami University of Ohio; The University of Texas, El Paso; Oregon State University; University of Oklahoma University of Rhode Island; Massachusetts Institute of Technology; and the US Geological Survey.

Starting in 2005 and extending into 2010, the HLP project seeks to establish a better understanding of why the Pacific Northwest, specifically eastern Oregon's High Lava Plains, is so volcanically active. This region, chosen for study because of its accessibility, its high volcanic flux (this the most volcanically active area of the continental United States), and its relatively young age, provides the team with an interesting and challenging problem. None of the accepted paradigms about crustal formation and magmatism fit eastern Oregon. By applying numerous techniques ranging from geochemistry and petrology to active and passive seismic imaging to geodynamic modeling, the group will be able to examine an assemblage of new data that they hope will give them key information about the roles of lithosphere structure, tectonics, flat-slab subduction, slab roll-back, and plumes as instigators of aerially extensive magmatism continuing from plate margins into the interior of the continent.
 
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