Chemical analysis of major constituents in surface sediment samples from GH79-1 cruise

Surface sediments were collected during the GH79-1 cruise, Geological Survey of Japan, from the area of 10°-13°N and 165°-180°W. Material for this study (34 samples) was selected from box core samples. The samples examined were mainly of an argillaceous or calcareous-argillaceous type. They were dried at 110°C, ground, and subsequently split into fractions. One fraction was analysed with automatic X-ray fluorescence spectrometer JOEL-IOOS for Si, Ti, Al, Fe, Mn, Mg, Ca, Na, K, and P. Other fractions were analysed for total water, ignition loss, dissolved chlorine, ferrous iron, and carbonate.