(Table 2) Location, age of accompanied sediments, chemical and Sr isotopic compositions of manganese nodules in DSDP/ODP cores, supplement to: Ito, Takashi; Usui, Akira; Kajiwara, Yoshimichi; Nakano, Takanori (1998): Strontium isotopic compositions and paleoceanographic implication of fossil manganese nodules in DSDP/ODP cores, Leg 1-126. Geochimica et Cosmochimica Acta, 62(9), 1545-1554


Strontium isotopic compositions of acetic acid (HOAc) leachate fractions of eight manganese oxide deposits from the modern seafloor, and of twenty-one buried manganese nodules from Cretaceous to Recent sediments in DSDP/ODP cores were measured. ratios of HOAc leachates in all modern seafloor manganese oxides of various origins are identical with present seawater. The ratios of the HOAc leachates of buried nodules from DSDP/ODP cores are significantly lower than those of nodules from the modern seafloor and are mostly identical with coeval seawater values estimated from the age of associated sediments. It is suggested that the buried nodules in DSDP/ODP cores are not artifacts transported from the present seafloor during the drilling process, but are in situ fossil deposits from the past deep-sea floor during Cretaceous to Quaternary periods. The formation of deep-sea fossil nodules prior to the formation of Antarctic Bottom Water (AABW) indicates that the circulation of oxygenated deep seawaters have activately deposited manganese oxides since the Eocene Epoch, or earlier.

DOI https://doi.org/10.1594/PANGAEA.696424
Related Identifier https://doi.org/10.1016/S0016-7037(98)00051-9
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.696424
Creator Ito, Takashi; Usui, Akira; Kajiwara, Yoshimichi; Nakano, Takanori
Publisher PANGAEA - Data Publisher for Earth & Environmental Science
Publication Year 1998
Rights Creative Commons Attribution 3.0 Unported
OpenAccess true
Language English
Resource Type Supplementary Dataset
Format text/tab-separated-values
Size 257 data points
Discipline Earth System Research
Spatial Coverage (-19.386W, -51.542S, 115.541E, 56.290N); North Atlantic Ocean; South Atlantic Ocean; South Indian Ridge, South Indian Ocean; Caribbean Sea/BASIN; North Pacific/BASIN; South Atlantic/BASIN; North Pacific/HILL; North Pacific/CONT RISE; North Atlantic/PLATEAU; North Pacific
Temporal Coverage Begin 1969-05-10T00:00:00Z
Temporal Coverage End 1988-07-14T13:00:00Z