Chemical Composition of Sediments

Abstract

Most of the samples obtained during Leg 35 were noncalcareous because this part of the Southeast Pacific Basin lies in a zone where production of biogenic carbonate is sharply curtailed, and the carbonate compensation depth (CCD) lies considerably shallower than the water depth of the sites. However, the Paleocene sediments of Site 323 contained interbedded layers of coccolith-rich sediment composed of 28%-29% CaCOs. Typi-'Translated from Russian.

Geochemistry of Deep Sea Sediments from the Nankai Trough, the Japan Trench, and Adjacent Regions

“…For the sediments collected by DSDP, even the major element geochemistry has not been examined for all sites, and minor or trace element geochemistry has been reported for only a few. Although the REEs are useful for drawing inferences regarding the origin of constituent materials and for understanding processes and environments of sedimentation, their abundances in the DSDP sediment samples are reported in only a few papers (e.g., Dymond et al, 1976;Bogdanov et al, 1976;Tarney and Donnellan, 1977).…”