Publication Date:
2023-08-28
Description:
During the campaign SO23/2 (R/V Sonne) in the South China sea various manganese deposits were retrieved by dredging. Two representative samples were selected for chemical analysis: one Mn crust (0.4 cm thick) attached to a vesicular olivine basalt fragment for station 40KD and one irregular spheroidal shaped Mn nodule with rough surface and a Miocene chalk core for station 44KD. In order to study the distribution of Th and U with distance, samples were drilled and the result was divided in equal parts. Liquid chromatography was used to separate and purify the Th isotopes. U and Th concentrations were determined using alpha spectrometry and 232Th isotope using atomic absorption spectroscopy.
Keywords:
40KD; 44KD; Alpha spectrometry; Atomic absorption spectroscopy; Deposit type; DEPTH, sediment/rock; Distance; Distance, maximum; Distance, minimum; Dredge, box; DRG_B; Elevation of event; Event label; Geochemistry; Identification; Latitude of event; Longitude of event; manganese micronodule; manganese nodule; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; ocean; sediment; SO23/2; SO23/2_40KD; SO23/2_44KD; Sonne; Thorium-230; Thorium-230, standard deviation; Thorium-230 excess; Thorium-230 excess, standard deviation; Thorium-232; Thorium-232, standard deviation; Uranium-234; Uranium-234, standard deviation; Zulu Sea
Type:
Dataset
Format:
text/tab-separated-values, 257 data points
