|STRUCTURAL CONTROLS ON MAGMA TRANSPORT
AND VERTICAL COUPLING IN THE CONTINENTAL LITHOSPHERE
Fiordland, New Zealand
Dates: April 26-May 6, 2003
Leaders: Keith Klepeis1, Geoffrey Clarke 2 , Tracy Rushmer 1, Andrew Tulloch 3
1University of Vermont; 2University of Sydney; 3Institute of Geological and Nuclear Sciences.
The mechanisms by which magma is generated, segregated and transported through continental crust and how these processes affect the mechanical evolution of orogens are two of the least understood issues of continental dynamics. Few field sites allow us to examine directly structural and magmatic features that evolved simultaneously within large sections of the lower crust. The Early Cretaceous granulite belt of Fiordland , New Zealand provides an unusual opportunity to examine feedbacks among magmatic, metamorphic and deformation processes at very deep levels of an ancient orogen (25-50 km paleodepths). This belt contains one of the world's best examples of high-pressure (14-16 kbar) migmatites, granulite facies mineral assemblages, and lower crustal structural features that enable us to observe the effects of lower crustal magmatism, sources of partial melting, the mechanisms and pathways of melt generation and escape, and how migrating magma interacted with deformation on a crustal scale. We plan to use these spectacular exposures to address the following issues:
Logistics, Participants and Costs
For 5 days we will live aboard the vessel Milford Wanderer to access remote sites along the waterways of Fiordland National Park. The Milford Wanderer is a fully enclosed, comfortable boat with three decks, 35 berths, tendercraft and a crew of five. First night in Dunedin will be in a motel. We also will stay 3 nights at the Milford Lodge (comfortable budget accommodation) where we will visit field sites and hold an informal conference prior to boarding the Milford Wanderer . We may use short helicopter trips if weather permits. While aboard the Milford Wanderer we will visit outcrops using small boats and anchor in protected areas for the evening. Dinners at 6-7:00 will be followed with informal discussions. Participants should be physically fit and comfortable walking on steep, rocky terrain. Limited roadside access will involve short walks (<0.5 km). Elsewhere we will be in mountain valleys (<1500 meters) or landing on coastal outcrops. Participants should be prepared for wind, rain, and cool (5-10°C, 40-50°F) temperatures. A list of recommended clothing will be provided.
This Field Forum is limited to 30 people. We encourage all geoscientists, and especially graduate students, with an interest in deformation, metamorphism and magmatism in the deep crust to apply. We aim to attract geologists, geophysicists, modelers and experimentalists. Participants should make their own travel arrangements to and from Dunedin, New Zealand. A registration fee of US$960 covers guidebook and all transportation, meals and lodging within New Zealand. Please send a letter of application to Keith Klepeis including a statement of interests, recent work relevant to the meeting’s themes, the subject of any proposed presentation (verbal or poster), and contact information (e-mail address). The registration fee is due by February 17, 2003 .
Registration Applications and Information
For more information please contact Keith Klepeis, Dept. of Geology, University of Vermont, Burlington, VT 05405, U.S.A. (802) 656-0246, fax: (802) 656-0045, firstname.lastname@example.org . Website: http://www.uvm.edu/~kklepeis/fieldforum/