247 datasets found

Manganese nodules were selected from various potential mining sites of the Pacific ocean. They were dried by heating at 1000°C until total evaporation and ground to powder...

Manganese nodules were selected from various potential mining sites of the Pacific ocean. They were dried by heating at 110°C for 24 hours and ground to powder before their...

Manganese nodules were selected from various potential mining sites of the Pacific ocean. They were dried by heating at 110°C for 24 hours and ground to powder before their...

Manganese crust samples were dredged from the Line Islands Ridge and the MidPacific Mountains that were recently taken during the R/V Sonne SO18 (Midpac 81) cruise. The metal...

Manganese nodules dredged in the Indian Ocean by R/V Marion Dufresne have been selected in conjunction with cores taken in their vicinity. Most of these samples are spherical or...

Cores retrieved in the Indian Ocean by R/V Marion Dufresne have been selected in conjunction with manganese nodules dredged in their vicinity. A sample was taken for each ore...

As a part of a continuing study of the distribution and abundance of tellurium in various materials of the earth's crust, analyses were made of 12 samples of manganese nodules...

Manganese nodules were selected from various areas of the Pacific, Indian and Atlantic ocean. They were analysed using a mercury vapour discharge technique. The minimum...

Selected manganese deposits from the Hawaiian Archipelago were submitted to chemical analysis using two methods. Atomic absorption spectrophotometry was used for the analysis of...

The chemical composition of layered deposit inside zones has been determined for ferromanganese nodules and crusts retrieved in the South Pacific Ocean during various R/V...

The ratio of 230 Thorium excess over 232 Thorium isotopes has been determined for different layered deposit zones inside ferromanganese nodules and crusts retrieved in the South...

From 1983 until 1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical Database from journal articles, technical reports and unpublished sources from other...

Chemical analyses were made on one hundred and forty five powder samples taken from defined parts of manganese nodules retrieved during the GH80-5 campaign of the R/V...

Ten manganese nodules from the Northeast Pacific Ocean have been sampled from box cores retrieved during R/V Valdivia campaign V13/1. Cross-sections for each of the nodules have...

Bottom dredging during the KK84 campign of the R/V Kana Kenoki recovered numerous ferromanganese crusts on a large variety of substrate (basalt, volcanics, limsetone and...

On the basis of the macroscopically visible layers, chemical analyses were carried out on various ferromanganese crust samples from VA 13/2 (station 237 KD) for minor elements...

On the basis of the macroscopically visible layers, chemical analyses were carried out on various ferromanganese crust samples from VA 13/2 (sample 237 KD) for Mn, Fe, Ni, Cu,...

During Valdivia cruise VA 13/2 dredging brought exceptionnally thick Mn crusts on top of basalt. One of these deposits is 22 cm thick and consists of three main zones and...

Ferromanganese deposits from the North Pacific and Blake Plateau have been sampled from potential mining sites either by the industry (Deepsea Ventures, Kennecott Corporation,...

Manganese nodules have been shown to consist of heterogeneous mixtures of a variety of biogenic, detrital and authigenic particles in a finely laminated structure. On a...