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doi:10.2204/iodp.proc.311.204.2009 IntroductionThis report presents the results of X-ray diffraction (XRD) and carbonatometry analyses of samples from five sites cored during Integrated Ocean Drilling Program (IODP) Expedition 311 (see the "Expedition 311 summary" chapter). Sites U1325–U1327 and U1329 are located along a southwest–northeast transect across the Cascadia margin, whereas Site U1328 corresponds to an active seafloor seepage near Site U1327 (Fig. F1). Authigenic carbonates have been previously recognized at the Cascadia margin (e.g., Sample and Kopf, 1995; Bohrmann et al., 1998; Greinert et al., 2001; Teichert et al., 2005; Teichert and Bohrmann, 2006) and may help evaluate the environmental conditions (i.e., temperature and geochemistry of pore fluids) during carbonate formation. |
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