Ten large (surface area = 50-360 cm 2) manganese nodules and crusts from the Pacific, Atlantic and the Indian Oceanshave been selected for ¹⁰Be and ⁹Be isotopes evaluation. In-depth samples from each nodule were collected by chipping with the aid of a stainless steel chisel and hammer as well as using a dental drill. Powdered resulting material was ovendried (at 110°C overnight). Separation procedure used in either hydroxylamine hydrochloride or 6 M HCI + H2O2. 10Be concentration was evaluated using a radiometric beta counter. 9Be was measured using a HGA 500 graphite furnace (Perkin Elmer, U.S.A.) coupled to a model 305A atomic absorption spectrophotometer on a suitably diluted aliquot of acid leaches. The solution was dried at ll0°C, charred at 800°C and atomized at 2650°C using Ar as the carrier gas.

From 1983 until 1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical Database from journal articles, technical reports and unpublished sources from other institutions. At the time it was the most extended data compilation on ferromanganese deposits world wide. Initially published in a proprietary format incompatible with present day standards it was jointly decided by AWI and NOAA to transcribe this legacy data into PANGAEA. This transfer is augmented by a careful checking of the original sources when available and the encoding of ancillary information (sample description, method of analysis...) not present in the NOAA-MMS database.This dataset represents the digitized Table 2, page 238, of the related publication.