R.J. Rosenbauer J. L. Bischoff 1977 <p>Quaternary sediments cored in the northeast Pacific nodule area (DOMES site C, 14°N, 126°W) contain a significant amount of hydrothermal metalliferous mud. Water content, color, mineralogy, and chemical composition are analogous to metalliferous sediments of the subequatorial East Pacific Rise.</p><p>Correction for contribution of pelagic clay indicates the metalliferous fraction to be about 40% of the sediment. SiO₂<span>&nbsp;</span>and Mg are major components in the corrected composition, as they are for other metalliferous sediments similarly corrected from a variety of East Pacific Rise and DSDP metalliferous sediments. A correlation between Mg and SiO₂<span>&nbsp;</span>for these corrected sediments could indicate a hydrothermal origin for a significant portion of the SiO₂.</p><p>Results from DSDP in the nodule area suggest that metalliferous globules are a ubiquitous minor component of the Clipperton Oceanic Formation, which underlies much of the Pacific ferromanganese nodule belt. This indicates that <span>deposition of hydrothermal precipitates is not confined to spreading centers.</span></p> application/pdf 10.1016/0012-821X(77)90089-9 en Elsevier Recent metalliferous sediment in the North Pacific manganese nodule area article