Blue Mountains Seminar, Fall 2006

Contacts:

Gene Humphreys (ghump@uoregon.edu), Tracy Vallier (tlvallier@hotmail.com), Becky Dorsey (rdorsey@uoregon.edu), Allan Kays (makays@uoregon.edu), Todd LaMaskin (tlamaski@uoregon.edu)

Here is our evolving schedule for the quarter.

Week 1:

Introductory Presentations by

Questions and suggestions for reading Burchfiel et al. (1992)

Additional Reading:

Dickinson (2004) - Evolution of the Western Cordillera of North America: Annual Review of Earth and Planetary Sciences, v. 32, p. 13-45.

DeCelles (2004) - Late Jurassic to Eocene evolution of the Cordilleran thrust belt and foreland basin system, western U.S.A.: American Journal of Science, v. 304, p. 105-168.

Follow-up on Week 2:

Good discussion about Burchfiel et al. (1992) and related issues of Cordilleran Mesozoic tectonics. Below I have posted some supplementary materials as a follow-up on that discussion. See also the nice summary of Cordilleran tectonics that Todd kindly put in everyone's boxes. The images in that handout can be downloaded here, and are from a a course taught at UIUC.

Recall that the Apennine thrust belt is Burchfiel et al.'s (1992) preferred modern analog for the Antler orogeny. They stated rather emphatically that the Apennines (and Antler orogeny) is not an arc-continent collision, but I (Becky) believe there is room for debate on this question. I did a little research and learned that most people regard the Apennine thrust belt as an active collisional orogen that is compressional on its leading (NE) side and is being torn apart by extension on its back (SW) side, perhaps related to deep-seated processes in the upper mantle. The Calabrian arc is not directly slamming into the European margin, as the term "collision" would imply, but many aspects of these plate interactions display the geometry of collisional tectonics where a continental margin is drawn into a subduction zone and associated arc complex. What do you think? Is this mainly a discussion of semantics (which would not be very interesting) ... OR do the different models for the Antler orogeny involve distinct differences in the driving mechanisms and plate-tectonic processes?

To help people think about the complex plate interactions in the Mediterranean region, I:

compiled a simplified tectonic map of the Mediterranean region, grabbed a
summary of the tectonic evolution of the Calabrian arc (adpated from a paper by Gvirtzman and Nur, 2001),
and found some interesting abstracts from the AGU 2004 Fall meeting.
See also Rosenbaum and Lister (2004).

Also, Allan added a presentation on some of his Work in the Wallow Mts and more thought questions.

You can also go back and read material posted above (Week 1) for more information.

Follow-up on Week 3

Basically, just visit the links to

NAVDAT - the Western North America Volcanic and Intrusive Rock Data Base. Link to Animations.

Alan Glazner's homepage - scroll down or link to What's New

For Week 4 ... Remember we meet at 9:00 a.m. Thursday October 19.

Read the two papers by Vic Camp:

Camp and Ross (2004) and Hooper et al. manuscript (in press?)

And check out Vic Camp's web page - link from there to How Volcanoes Work, and Radiating Volcanic Migrations

For Week 5 ... Two sets of papers by Sandra Wyld:

Set 1: High Priority, please read: Wyld and Wright (2001) and Wyld (2002)

Set 2: Additional (optional) reading: Wyld (1996), Wyld et al. (1996), Wyld (2000), Wyld et al (2003), and Wyld et al. (in press) (whew Sandra!).

And an intriguing new model for the Great Valley forearc basin: Wright and Wyld (2007)

For Week 6 ... Two papers by Basil Tikoff:

McClelland et al (2000) , Giorgis et al (2005), and Tikoff et al. (2001) hard copy only.