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doi:10.2204/iodp.proc.308.214.2009

Data report: X-ray analyses of bulk sediment in IODP Holes U1320A and U1324B, northern Gulf of Mexico¹

Cédric M. John^2, 3 and Thierry Adatte⁴

Abstract

We present the results of 276 X-ray diffraction analyses of bulk sediment from Brazos-Trinity IV (Integrated Ocean Drilling Program [IODP] Hole U1320A) and Ursa (IODP Hole U1324B) Basins. The mineralogy at both locations is qualitatively very similar, with quartz and phyllosilicates dominating the assemblages and calcite, dolomite, K-feldspars, plagioclases, and halite present in varying amounts. Ankerite (iron-rich dolomite) was observed in only one sample. Although the composition of the sediment is relatively monotonous, trends in the percent occurrence of each fraction are observed and can be linked to changes in the lithostratigraphic units and core descriptions from Expedition 308. The data presented here will help establish a link between geomechanical behaviors of the sediments and matrix effects driven by mineral composition.

¹John, C.M., and Adatte, T., 2009. Data report: X-ray analyses of bulk sediment in IODP Holes U1320A and U1324B, northern Gulf of Mexico. In Flemings, P.B., Behrmann, J.H., John, C.M., and the Expedition 308 Scientists, Proc. IODP, 308: College Station, TX (Integrated Ocean Drilling Program Management International, Inc.). doi:10.2204/​iodp.proc.308.214.2009

²Integrated Ocean Drilling Program, 1000 Discovery Drive, College Station TX 77845-9547, USA.

³Present address: Department of Earth Science and Engineering, Imperial College London, London SW7 2BP, United Kingdom. cedric.john@imperial.ac.uk

⁴Institut de Géologie et Paléontologie, UNIL, CH-1015 Lausanne, Switzerland.

Initial receipt: 22 August 2008
Acceptance: 15 April 2009
Publication: 29 June 2009
MS 308-214

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