962 datasets found

The Carnegie Ridge is a linear, aseismic, submarine ridge lying between the Galapagos Islands and the coast of South America. Surface ship, near bottom, and grain size studies...

An elongate ENE-trending seamount in the New Caledonia Basin is interpreted as the product of basaltic fissure eruption. The age is unknown, but Pleistocene-Recent shallow water...

he proposed mining of ferromanganese deposits from the deep sea will affect benthic and pelagic environments depending to a great extent on the method of nodule retrieval and...

A German coring device (Reineck, 1958) has been improved to obtain oriented, undisturbed cores at any depth of water. The samples are rectangular in shape, 8 × 12 inches in plan...

In surface sediment at the three DOMES sites in the equatorial North Pacific, the percentage of reworked fauna and the thickness of the acoustically transparent uppermost layer...

Cores, submarine photography and dredges described in this report were taken during the R/V Melville Cruise Vulcan-1 in September 1980 by the School of Oceanography, Oregon...

The oxide portion of marine manganese nodules deserves intensive study because it probably reflects directly the conditions under which nodules form in the Bea. A better...

The environmental conditions and processes that result in the origin and growth of marine manganese nodules have been of interest to both science and industry for more than 100...

Internal growth features of manganese nodules reveal that many nodules are structurally, chemically, and mineralogically non-uniform, largely as a result of a complex growth...

Manganese nodules collected off Baja California have layers (zones) which are texturally and compositionally distinct. Massive and mottled zones consist mostly of...

Recent study of many box cores and deep sea photographs from DOMES Sites A, B, and C throws new light on the mode or occurrence of manganese nodules in the Horn Region o f the...

This dataset is part of the NOAA and MMS Marine Minerals Geochemical Database. From 1983 until 1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical Database from...

During Dive 408 of Shinkai 2000 on the flank of the Kaikata Seamount located on the volcanic front of the Izu-Ogasawara (Bonin) Arc, possibly recent hydrothermal manganese...

Testing of a continuous bucket-line dredging system was carried out in the South Pacific August 23 through September 14, 1970 by Japan Resources Association aboard the vessel...

Occurrences and associations of ferro-manganese deposits at relatively shallow depths in the Hawaiian Archipelago were revealed by a series of cruises on the R/V Teritu. The...

DOMES area C sediment is quite heterogeneous, but most commonly is classified as mud (clay minerals, quartz, and feldspar) or siliceous ooze. However, in several samples Fe-Mn...

An extremely large manganese encrusted rock (allegedly called, manganese nodule) inadvertently retrieved by the USGC PONTCHARTRAIN (WHEC-70) during a deep Nansen cast on Ocean...

Based on chemical, spectrographic and X-ray analyses, 34 samples from the experimental Mohole consist of variable proportions of calcite (0-60 percent), biogenic opal (0-50...

Cores, submarine photography and dredges described in this report were taken during the R/V Knorr Cruise K79-05 in 1979. Cores and dredges were recovered for 43 stations. From...

The author analysed a collection of 91 tub-specimens, taken during the two voyages of the Ingolf-expedition in the summers of 1895 and 1896. From 1983 until 1989 NOAA-NCEI...