(Fig 3, page 49) Variations with depth of the SMOW Relative Deuterium/Hydrogen Ratio (DeltaD) values of Pacific Ocean manganese deposits

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Main Authors:	Hariya, Yu, Tsutsumi, Makoto
Format:	Dataset Open Access
Language:	en
Published:	PANGAEA 1981
Subjects:	Core; CORE; Deposit type; DEPTH, sediment/rock; Dredge, box; DRG_B; Event label; FFGR; Free-fall grab; GH77-1; GH77-1-D212; GH77-1-FG40-1; GH77-1-G384; Hakuho-Maru; Hakurei-Maru (1974); Identification; Isotope ratio mass spectrometry; KH-73-4; KH73-4-2; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; O70; Ocean 70 grab; Pacific Ocean; δ Deuterium
Online Access:	Acceder al recurso
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_version_	1867170072919801856
author	Hariya, Yu Tsutsumi, Makoto
author_facet	Hariya, Yu Tsutsumi, Makoto
collection	Datos científicos de ciencias marinas y ambientales
contents	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.
format	Dataset Open Access
id	pangaea_https___doi_org_10_1594_PANGAEA_872361
institution	PANGAEA
language	en
publishDate	1981
publisher	PANGAEA
record_format	pangaea
spellingShingle	(Fig 3, page 49) Variations with depth of the SMOW Relative Deuterium/Hydrogen Ratio (DeltaD) values of Pacific Ocean manganese deposits Hariya, Yu Tsutsumi, Makoto Core; CORE; Deposit type; DEPTH, sediment/rock; Dredge, box; DRG_B; Event label; FFGR; Free-fall grab; GH77-1; GH77-1-D212; GH77-1-FG40-1; GH77-1-G384; Hakuho-Maru; Hakurei-Maru (1974); Identification; Isotope ratio mass spectrometry; KH-73-4; KH73-4-2; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; O70; Ocean 70 grab; Pacific Ocean; δ Deuterium 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.
title	(Fig 3, page 49) Variations with depth of the SMOW Relative Deuterium/Hydrogen Ratio (DeltaD) values of Pacific Ocean manganese deposits
topic	Core; CORE; Deposit type; DEPTH, sediment/rock; Dredge, box; DRG_B; Event label; FFGR; Free-fall grab; GH77-1; GH77-1-D212; GH77-1-FG40-1; GH77-1-G384; Hakuho-Maru; Hakurei-Maru (1974); Identification; Isotope ratio mass spectrometry; KH-73-4; KH73-4-2; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; O70; Ocean 70 grab; Pacific Ocean; δ Deuterium
url	https://doi.org/10.1594/PANGAEA.872361

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