(Fig 3, page 49) Variations with depth of the SMOW Relative Deuterium/Hydrogen Ratio (DeltaD) values of Pacific Ocean manganese deposits, supplement to: Hariya, Yu; Tsutsumi, Makoto (1981): Hydrogen-isotopic composition of some hydrous manganese minerals. Chemical Geology, 34(1-2), 43-52


Initial data on the hydrogen-isotopic compositions in hydrous Mn minerals from various occurrences fall in a wide range from -298 to -84 per mil, relative to SMOW. DeltaD-values of todorokite and cryptomelane from Tertiary deposits show -89 and -150 per mil. 10 Angström-manganite and Delta-MnO2 from deep-sea nodules have relatively restricted DeltaD-values ranging from -96 to -84 per mil. The DeltaD-values for manganese bog ores from recent hot springs show almost -105 per mil. It is recognized that the isotopic values obtained for the deep-sea nodules and recent bog ores are slightly different ranged. Manganite and groutite are unique in their hydrogen-isotopic compositions, having the most depleted DeltaD-values ranging from -298 to -236 per mil. MnO(OH) minerals are more deuterium-depleted hydrous minerals than any other hydrothermal minerals from various ore deposits. Hydrogen-isotope fractionation factors between manganite and water were experimentally determined to be 0.7894, 0.7958 and 0.8078 at 150°, 200° and 250°C, respectively. the present experimental results indicate that if manganites were formed at temperatures below 250°C, under isotopic equilibrium conditions, most of the manganite mineralization in the Tertiary manganese deposits must have precipitated from meteoric hydrothermal solutions.

DOI https://doi.org/10.1594/PANGAEA.872361
Related Identifier https://doi.org/10.1016/0009-2541(81)90070-X
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.872361
Creator Hariya, Yu; Tsutsumi, Makoto
Publisher PANGAEA - Data Publisher for Earth & Environmental Science
Publication Year 1981
Rights Creative Commons Attribution 3.0 Unported
OpenAccess true
Language English
Resource Type Supplementary Dataset
Format text/tab-separated-values
Size 12 data points
Discipline Earth System Research
Spatial Coverage (-175.035W, 8.970S, 149.683E, 12.533N); Pacific Ocean
Temporal Coverage Begin 1973-08-15T00:00:00Z
Temporal Coverage End 1977-02-26T00:00:00Z