4. Data Report: Site Survey Results from Cruise EW99031

Douglas S. Wilson,2 Eric Hallenborg,3 Alistair J. Harding,3 and Graham M. Kent3


Cruise EW9903 of the Maurice Ewing sailed from Panama to San Diego in March and April 1999, with goals of determining the structure of oceanic crust formed at superfast spreading rates and conducting site survey work in support of Joint Oceanographic Institutions for Deep Earth Sampling (JOIDES) proposal 522. Three survey grids were collected in the Guatemala Basin at sites formed at spreading rates >200 mm/yr (Wilson, 1996), and one grid was collected in the Alijos Rocks area west of Baja California (Figs. F1, F2). This report presents basic data bathymetry, magnetics, and gravity data for all of the grids and migrated multichannel seismic reflection (MCS) sections for the Guatemala Basin sites. Seismic refraction results will be reported separately (Harding et al., unpubl. data).

1Wilson, D.S., Hallenborg, E., Harding, A.J., and Kent, G.M., 2003. Data report: Site survey results from cruise EW9903. In Wilson, D.S., Teagle, D.A.H., Acton, G.D., et al. (Eds.), Proc. ODP, Init. Repts., 206 [Online]. Available from World Wide Web: <http://www-odp.tamu.edu/publications/206_IR/chap_04/chap_04.htm>. [Cited YYYY-MM-DD]
Department of Geological Sciences and Marine Science Institute, University of California, Santa Barbara, Santa Barbara CA 93016-9630, USA. wilson@geol.ucsb.edu 
3Cecil H. and Ida M. Green Institute of Geophysics and Planetary Physics, Scripps Institution of Oceanography, University of California, San Diego, La Jolla CA 92037, USA.

Ms 206IR-104