PANGAEA_888699 (Table 1, page 765) D/L Ratios of Amino Acids in Bone Nuclei of Manganese Nodules from the North Pacific Ocean Kvenvolden, Keith A; Blunt, David J (Table 1, page 765) D/L Ratios of Amino Acids in Bone Nuclei of Manganese Nodules from the North Pacific Ocean 1979 PANGAEA Dataset Supplement to: Kvenvolden, Keith A; Blunt, David J (1979): Amino Acid Dating of Bone Nuclei in Manganese Nodules from the North Pacific Ocean. In: Bischoff J.L., Piper D.Z. (eds) Marine Geology and Oceanography of the Pacific Manganese Nodule Province, Springer, Boston, MS, ISBN 978-1-4684-3518-4, Marine Sciences, 9, 763-774, https://doi.org/10.1007/978-1-4684-3518-4_24 https://doi.pangaea.de/10.1594/PANGAEA.888699 Investigator Keith A Kvenvolden Earth Science Event label Identification DEPTH, sediment/rock Valine D/L ratio Alanine D/L ratio Isoleucine acid D/L ratio Leucine D/L ratio Proline D/L ratio Aspartic acid D/L ratio Glutamic acid D/L ratio Thickness Substrate type Deposit type geoscientificInformation Dredge, bucket SS72/3 SS72/5 SS72-58DB SS72-80DB SS72-87DB SS72-92DB SS72-94DB Gas chromatography 1972-05-01 1972-06-01 Complete 7.83 28.397 -169.05 -148.325 0.0 m (DEPTH, sediment/rock) 0.0 m (DEPTH, sediment/rock) NOAA-MMS NOAA and MMS Marine Minerals Geochemical Database unrestricted CC-BY-3.0: Creative Commons Attribution 3.0 Unported English PANGAEA Data Publisher for Earth & Environmental Science https://www.pangaea.de/ Data Center Contact Michael Diepenbroek info@pangaea.de

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Bremen Bremen 28359 Germany online 79 data points text/tab-separated-values 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, https://doi.org/10.7289/V52Z13FT Warnken, Robin R; Virden, William T; Moore, Carla J (1992): The NOAA and MMS Marine Minerals Bibliography. National Geophysical Data Center, NOAA, https://doi.org/10.7289/V53X84KN

The extent of racemization of isoleucine and aspartic acid has been measured on cetacean ear bones from the center of 8 manganese nodules in order to estimate the ages of the nuclei of the nodules and the rates of accretion of ferromanganese oxide layers. Age estimates obtained range from about 0.4 to 6 m.y., and rates of growth from <1 to about 10 mm/m.y. These rates are consistent with those obtained by other nucleus dating methods (K-Ar and fission track) and by layer dating methods (230Th, 231Pd, 10Be and 26Al). ** For all details see the full metadata description at "https://doi.pangaea.de/10.1594/PANGAEA.888699"! ** The analysed manganese accumulation was seperated by sonication in 1N HCl and dissolved in 10N HCl. The dried residue was then hydrolysed in 6N HCl for 20 hours at 110°C. Amino acids were finally eluded with 2N NH4OH. 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.

https://doi.org/10.1007/978-1-4684-3518-4_24 Amino Acid Dating of Bone Nuclei in Manganese Nodules from the North Pacific Ocean https://doi.org/10.7289/V52Z13FT The NOAA and MMS Marine Minerals Geochemical Database https://doi.org/10.7289/V53X84KN The NOAA and MMS Marine Minerals Bibliography https://en.wikipedia.org/wiki/Aspartic_acid Aspartic acid D/L ratio https://en.wikipedia.org/wiki/Glutamic_acid Glutamic acid D/L ratio https://wiki.pangaea.de/wiki/NOAA-MMS NOAA-MMS DIF 9.4 2026-04-30