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Bourles, Didier L; Raisbeck, Grant M (1988): Al and Be isotope composition of two ferromanganese crusts from the Pacific Ocean. PANGAEA,, Supplement to: Bourles, 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.; 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),

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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.
Source data set:
Grant, John Bruce; Moore, Carla J; Alameddin, George; Chen, Kuiying; Barton, Mark (1992): The NOAA and MMS Marine Minerals Geochemical Database. National Geophysical Data Center, NOAA,
Further details:
Warnken, Robin R; Virden, William T; Moore, Carla J (1992): The NOAA and MMS Marine Minerals Bibliography. National Geophysical Data Center, NOAA,
Median Latitude: 20.759500 * Median Longitude: 173.390000 * South-bound Latitude: 20.752000 * West-bound Longitude: 173.340000 * North-bound Latitude: 20.767000 * East-bound Longitude: 173.440000
Date/Time Start: 1971-05-17T00:00:00 * Date/Time End: 1971-05-18T00:00:00
Minimum Elevation: -1834.0 m * Maximum Elevation: -1285.0 m
ARIES-012D * Latitude: 20.752000 * Longitude: 173.440000 * Date/Time: 1971-05-17T00:00:00 * Elevation: -1834.0 m * Location: Pacific Ocean * Campaign: ARIES * Basis: Thomas Washington * Device: Dredge (DRG)
ARIES-015D * Latitude: 20.767000 * Longitude: 173.340000 * Date/Time: 1971-05-18T00:00:00 * Elevation: -1285.0 m * Location: Pacific Ocean * Campaign: ARIES * Basis: Thomas Washington * Device: Dredge (DRG)
#NameShort NameUnitPrincipal InvestigatorMethodComment
1Event labelEventRaisbeck, Grant M
2IdentificationIDRaisbeck, Grant M
3DEPTH, sediment/rockDepthmRaisbeck, Grant MGeocode
4DISTANCEDistancecmRaisbeck, Grant MGeocode
5Distance, minimumDist minmmRaisbeck, Grant M
6Distance, maximumDist maxmmRaisbeck, Grant M
7Aluminium 2727Almg/kgRaisbeck, Grant MAccelerator mass spectrometry (AMS)
8Aluminium 2626Al106 atoms/gRaisbeck, Grant MAccelerator mass spectrometry (AMS)
9Aluminium 26, standard deviation26Al std dev±Raisbeck, Grant M
10Beryllium 1010Be109 atoms/gRaisbeck, Grant MAccelerator mass spectrometry (AMS)
11Beryllium 10, standard deviation10Be std dev±Raisbeck, Grant M
12Deposit typeDeposit typeRaisbeck, Grant M
13DescriptionDescriptionRaisbeck, Grant M
20 data points

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