Keck Geology Consortium - 2012

Award Date: November 2012

Summary

John Garver, Professor of Geology, has been awarded a Keck Geology Consortium grant in the amount of $26,666 to support his collaborative research project with Professor Cameron Davidson of Carleton College.   This project, entitled “Tectonic Evolution of the Flysch of the Chugach Terrane on Baranof Island, Alaska (Year Three)” continues a multi-year Keck project focused on understanding the tectonic evolution of the Chugach-Prince William terrane in south central Alaska.  The field work will involve four undergraduate students, and integrates with Prof. Garver's National Science Foundation grant (Award ID # EAR-1116554). 

Abstract

View the complete project description: Tectonic Evolution of the Flysch of the Chugach Terrane on Baranof Island, Alaska (Year Three)

WHAT: This project focuses on the tectonic evolution of the Chugach-Prince William terrane in Southeast Alaska, and it is a continuation of our 2011, and 2012 projects. This thick accretionary complex is dominated by Campanian-Paleocene (c. 75-55 Ma) trench fill turbidites likely derived from a volcano-plutonic complex. Near-trench plutons of the Sanak-Baranof belt imprinted a distinctive thermal event on these rocks and are a key indicator of plate position between 61-50 Ma. The primary study area for 2013 is the Sitka Graywacke in Sitka, Alaska, and the nearby and presumed metamorphosed equivalent, Baranof Schist in Whale Bay in the South Baranof Wilderness Area. Student projects will be focused on metamorphism and thermal evolution of these rocks, and sedimentary provenance including U/Pb dating of detrital zircon.

WHERE: Central and Southeast Alaska, transport through the Yukon. Schedule: [1] Gathering in University of Alaska (Anchorage) and field trips, [2] drive with gear east across Alaska to the Yukon, south to Haines [3] Travel by ferry to Sitka;  [4] Whale Bay, Baranof Island; [5] return Anchorage, pack, and depart.   Canada travel is part of this effort, so a passport is required.

WHO: Four students and project Leaders: John I. Garver (Union) (tectonics, thermochronology, sedimentation and tectonics) and Cameron Davidson (Carleton) (metamorphic petrology, structural geology and tectonics).

The 2013 Field Season
Baranof Island.  For the 2013 field season (2013-14 project) we plan to target two areas on Baranof Island near Sitka with a goal of understanding the relationship between the Sitka Graywacke and the Baranof Schist, and to address the timing of post-metamorphic cooling.