Roughly 900 km of high-quality single-channel seismic reflection profiles were completed on the eastern flank of the northern Juan de Fuca Ridge in 1995 and 1996 to provide structural context for a variety of geophysical and geochemical investigations of hydrothermal circulation and crustal alteration in this young, thickly sedimented environment. Lines are disposed along five primary transects and several local detailed arrays, with most striking normal to local isochrons. The most northerly transect extends from the ridge axis to a point roughly 150 km east over crust 5 Ma in age, and crosses sites drilled during Ocean Drilling Program Leg 168. A brief description of the profiles is provided, although the primary purpose of this report is to provide the reader full access to the data. Towards this end, we provide all profiles in both unmigrated and migrated SEG-Y formats. We also include files of full-resolution differential Global Positioning System navigation and manually picked traveltimes to seafloor and basement reflections.
1Fisher, A., Davis, E.E., and Escutia, C. (Eds.), 2000. Proc. ODP, Sci. Results, 168 [Online]. Available from World Wide Web: <http://www-odp.tamu.edu/publications/168_SR/168sr.htm>. [Cited YYYY-MM-DD]
2Fachbereich Geowissenschaften, University of Bremen, Postfach 330-440, D-28334 Bremen, Germany. vill@uni-bremen.de
3Pacific Geoscience Centre, Geological Survey of Canada, P.O. Box 6000, Sidney, BC V8L 4B2, Canada.
Date of initial
receipt: 30 November 1998
Date of acceptance: 27 June 1999
Ms 168SR-021