Palmer Deep, on the inner continental shelf southwest of Anvers Island off the Antarctic Peninsula, is a glacially overdeepened basin consisting of three subbasins. Two sites, 1098 and 1099, were drilled in the Palmer Deep area.
A high-resolution porosity curve has been calculated from density data and subsequently plotted against the shipboard lithologic logs. These new data correspond accurately to the lithologic logs, magnetic susceptibility, and gamma ray attenuation (GRA) density data and offer information on the heterogeneity of the sediments.
Petrophysical groups have been generated to investigate interrelationships between different physical attributes. To develop these petrophysical groups, crossplots of the available physical properties data were performed. The results for the GRA density and magnetic susceptibility crossplots demonstrate distinct clusters. Plotting the magnetic susceptibility and GRA density data logs (divided into these new petrophysical groups) against lithology provided information to subdivide the lithologic unit(s) into a series of petrophysical units.
1Hatfield, K.L., Evans, A.J., and Harvey, P.K., 2002. Defining petrophysical units of the Palmer Deep sites from Leg 178. In Barker, P.F., Camerlenghi, A., Acton, G.D., and Ramsay, A.T.S. (Eds.), Proc. ODP, Sci. Results, 178 [Online]. Available from World Wide Web: <http://www-odp.tamu.edu/publications/178_SR/chap_30/chap_30.htm>. [Cited YYYY-MM-DD]
2Amerada Hess Ltd., 33 Grosvenor Place, London, SW1X 7HY, United Kingdom. kate.hatfield@hess.com
3School of Geography, Leeds University, Leeds, LS2 9JT, United Kingdom.
4Geology Department, Leicester University, Leicester, LE1 7RH, United Kingdom.
Initial
receipt: 30 July 1999
Acceptance: 17 October 2001
Web publication: 21 February 2002
Ms 178SR-201