121 datasets found

9 manganese nodules from sites in the Central Pacific Ocean were analyzed at Scripps Institution of Oceanography using X-ray fluorescence analysis. From 1983 until 1989...

14 manganese nodules and crusts from sites in the Pacific Ocean were analyzed at Scripps Institution of Oceanography using Atomic absorption spectrophotometry (AAS) From 1983...

142 manganese nodules and crusts from sites in the Pacific Ocean were analyzed at Scripps Institution of Oceanography using X-ray emission spectrometry (XES). From 1983 until...

59 samples of metalliferous sediments taken from 17 box cores retrieved from DOMES Sites A, B and C have been analysed. Samples, including pore water salts, were dried at 1100C....

Preliminary results of a 14-day cruise of the USC&GS ship Oceanographer to the area near the junction of Juan de Fuca Ridge and the Blanco Fracture Zone are reported. About...

Analyses of the total alpha radioactivity distribution in 31 North Pacific manganese nodules yield an average growth rate of 6.8 ( 2) mm /m.y. Samples from a single box core...

We report here that a manganese nodule from the Central Pacific manganese nodule province has been dated by fossil diatoms found in mud scraped from near the nodule's centre....

Erosion of sediment at two sites within the siliceous-clay province of the northeast equatorial Pacific is investigated by examining radionuclide, radiolarian and percent...

Pelagic sediment recovered at DOMES Site A in the equatorial North Pacific (151°W, 9° 15?N) consists of a surface homogeneous layer, approximately 10 cm thick, overlying a...

The major and minor element composition of ferromanganese nodules from DOMES Site A has been determined by X-ray fluorescence methods. Three phases appear to control the bulk...

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...

The study of the chemical composition of DOMES Site C sediment was undertaken in order to establish important baseline parameters in the overall characterization of the...

The distribution of rare earth elements (REE) in ferromanganese nodules from DOMES Site A has been determined by instrumental neutron activation methods. The concentrations of...

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,...

Determination of radium, thorium, uranium isotopes, and 210Pb in sediments and sediment pore waters from North Equatorial Pacific deep-sea clay-silicous oozes shows that the...

Three ferromanganese nodules handpicked from the tops of 2500 cm2 area box cores taken from the north equatorial Pacific have been analysed for their U-Th series nuclides....

Methods of estimating manganese nodule grade and concentration were investigated using bottom photographs from a well-explored east-central Pacific manganese nodule deposit....

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...

Analyses of the bulk oxidation state of marine manganese nodules indicates that more than 98% of the Mn in deep ocean nodules is present as Mn(IV). The samples were collected...

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...