29 datasets found

The manganese content of 7 manganese nodules was determined by neutron activation. The decrease of unsupported 231Pa and 230Th in the outer few tenths of millimeters was used to...

For a pelagic sediment core taken in the Atlantic Ocean, The decrease of unsupported 231Pa was used for the determination of the accretion rate. Because CaCO3 is a Mn-free...

For 4 pelagic sediment cores taken in the Atlantic Ocean, Ericson's paleontologic boundaries X-Y (75 000 yr) and Y-Z (11 000 yr) were used. The age of the upper boundary was...

For 7 pelagic sediment cores, the decrease in unsupported 130Th activity with depth in the core was used to establish the mean accumulation rate over the last 300 000 years....

For 27 pelagic sediment cores, the Brunnes-Matuyama magnetic reversal boundary (700 000 yr) was used to establish the mean sedimentation rate between this level and the core...

Digitized Table 3, Page 410.From 1983 until 1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical Database from journal articles, technical reports and unpublished...

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1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical Database from journal articles, technical reports and unpublished sources from other...

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1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical Database from journal articles, technical reports and unpublished sources from other...

Only the 1cm Mn rich nodule outer rind or Mn crust upper part have been analysed.From 1983 until 1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical Database from...

Samples were dried for 24 hours at 60° C.From 1983 until 1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical Database from journal articles, technical reports and...

All samples have been homogenized to powder before analysis, being irradiated for 6 hours.From 1983 until 1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical...

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1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical Database from journal articles, technical reports and unpublished sources from other...

The chemical composition of ferromanganese crusts retrieved during the KK84 (R/V Kana Keoki) and L583HW (R/V S.P. Lee) was determined using methods developed by Haynes, B. W. at...

9 manganese crusts retrieved from the Manihiki Plateau area by R/V Tui have been analysed by instrumental neutron activation analysis in order to characterize their geochemical...

Five manganese nodules from a range of deep-sea and fossil environments were selected for this study. Most samples were prepared for bulk analysis by grinding the material...

The authors have selected for analysis a manganese nodule from Station 20 of the PLEIADES Mn7601 campaign. This "apple" shaped nodule (6.5x3.0 cm) was laying on a bed of...

The table presents the REE contents and fluxes of manganese nodules and crusts from the Manganese Nodule Program (MANOP) site H (6.5° N, 93° W) in the eastern equatorial...

Manganese nodules, crusts and micronodules from dredges and cores were retrieved during campaign DM14 of R/V Dmitry Mendeleev in the Pacific Ocean. Their chemical composition...

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...