Al and Be isotope composition of two ferromanganese crusts from the Pacific Ocean

DOI

The technique of accelerator mass spectrometry (A.H.S.) has opened up a number of new potential geochronological applications of long lived cosmogenic nuclei- However the absence of any obvious stage leading to equilibrium between the radioactive and corresponding stable isotope(s) in the geochemical cycle of many of these species, complicates considerably their potential dating applications. The radioisotope 10Be (half-life 1.5 My) is formed by spallation reactions between cosmic rays and 14N, 16O in the atmosphere. It is transferred to the oceans in soluble form by precipitation and dry deposition. The 10Be et 16Al having similar chemical behaviours and being influenced by the same geophysical and geochemical phenomena before being incorporated into the marine sediments, their ratio is tested in order to date those sediments. This approach is also applied to manganese nodules and ferromanganese crusts.

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1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical Database from journal articles, technical reports and unpublished sources from other institutions.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

Supplement to: Bourlès, Didier L (1988): Etude de la géochimie de l'isotope cosmogénique 10Be et de son isotope stable 9Be en milieu océanique. Application à la datation des sédiments marins = Study of the geochemistry of the cosmogenic isotope 10Be and the stable isotope 9Be in oceanic environment. Application to marine sediment dating. Ph. D. Dissertation, Université de Paris-Sud, Centre d'Orsay, France. https://inis.iaea.org/search/search.aspx?orig_q=RN:23046328; supplement to Raisbeck G. M., Yiou F., Klein J., Middleton R., Sharma P. and Somayajulu B. L. K. (private communication), 227 pp (pdf 3.3 MB)

Identifier
DOI https://doi.org/10.1594/PANGAEA.874277
Related Identifier https://store.pangaea.de/Projects/NOAA-MMS/Bourles_1988.pdf
Related Identifier https://doi.org/10.7289/V52Z13FT
Related Identifier https://doi.org/10.7289/V53X84KN
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.874277
Provenance
Creator Bourlès, Didier L ORCID logo; Raisbeck, Grant M
Publisher PANGAEA
Publication Year 1988
Rights Creative Commons Attribution 3.0 Unported; https://creativecommons.org/licenses/by/3.0/
OpenAccess true
Representation
Language English
Resource Type Supplementary Dataset; Dataset
Format text/tab-separated-values
Size 20 data points
Discipline Earth System Research
Spatial Coverage (173.340W, 20.752S, 173.440E, 20.767N); Pacific Ocean
Temporal Coverage Begin 1971-05-17T00:00:00Z
Temporal Coverage End 1971-05-18T00:00:00Z