Publication Date:
2023-08-28
Description:
Using radiochemical methods, the authors have measured the distribution of uranium, thorium, radium, polonium and protactinium isotopes from the top and bottom sides of the 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 siliceous ooze (see illustrations). Successive thin layers of the nodule were carefully scraped from the surface of the measured area with a sharp surgical blade. All samples reduced to powder were air-dried at 110°C for at least two hours before analysis. The relative gross alpha activities from each layer were assayed by Alpha spectrometry using a thick-source counting in a scintillation counter.
Keywords:
Alpha spectrometry; BC; Box corer; Deposit type; DEPTH, sediment/rock; DISTANCE; Distance, maximum; Distance, minimum; Elevation of event; Event label; Geochemistry; Identification; Latitude of event; Longitude of event; manganese micronodule; manganese nodule; Melville; MN76-01, Pleiades; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; ocean; Pacific Ocean; PLDS04MV-109BX; PLDS-4; Polonium-210; Protactinium-231; Protactinium-231 excess; Protactinium-231 excess, standard deviation; Radium-226; Sample type; sediment; Thorium-228; Thorium-230; Thorium-230 excess; Thorium-230 excess, standard deviation; Thorium-232; Uranium-234; Uranium-238
Type:
Dataset
Format:
text/tab-separated-values, 218 data points
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