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  • 1
    Electronic Resource
    Electronic Resource
    Non-chondritic distribution of the highly siderophile elements in mantle sulphides (2000)
    [s.l.] : Macmillian Magazines Ltd.
    Nature 407 (2000), S. 891-894 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The abundances of highly siderophile (iron-loving) elements (HSEs) in the Earth's mantle provide important constraints on models of the Earth's early evolution. It has long been assumed that the relative abundances of HSEs should reflect the composition of chondritic meteorites—which ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/35038049
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    In situ Os isotopes in abyssal peridotites bridge the isotopic gap between MORBs and their source mantle (2005)
    [s.l.] : Nature Publishing Group
    Nature 436 (2005), S. 1005-1008 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Abyssal peridotites are assumed to represent the mantle residue of mid-ocean-ridge basalts (MORBs). However, the osmium isotopic compositions of abyssal peridotites and MORB do not appear to be in equilibrium, raising questions about the cogenetic relationship between those two reservoirs. ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/nature03902
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  • 3
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    Geochemistry of highly depleted peridotites of the Mid-Atlantic Ridge (2008)
    PANGAEA
    In:  Supplement to: Godard, Marguerite; Lagabrielle, Yves; Alard, Olivier; Harvey, Jason (2008): Geochemistry of the highly depleted peridotites drilled at ODP Sites 1272 and 1274 (Fifteen-Twenty Fracture Zone, Mid-Atlantic Ridge): Implications for mantle dynamics beneath a slow spreading ridge. Earth and Planetary Science Letters, 267(3-4), 410-425, https://doi.org/10.1016/j.epsl.2007.11.058
    Details
    Publication Date: 2024-01-09
    Description: During ODP Leg 209, a magma-starved area of the Mid-Atlantic Ridge (MAR) was drilled in the vicinity of the Fifteen-Twenty Fracture Zone (FZ) that offsets one of the slowest portions of the spreading ridge. We present here the results of a bulk rock multi-elemental study of 27 peridotites drilled at Sites 1272 and 1274 (to the south and the north of the FZ, respectively). The peridotites comprise mainly of harzburgites with minor dunites. Clinopyroxene (Cpx), which is interstitial and interpreted as secondary, is observed in Site 1274 peridotites. Sites 1272 and 1274 peridotites have low Al2O3 contents (〈1 anhydrous wt.%), high Mg# (〉91.5), and bulk rock trace elements compositions mostly below 0.1X primitive mantle (PM). These peridotites, and in particular Site 1272 peridotites, represent the most depleted peridotites yet sampled at a slow spreading ridge. Their compositions indicate high degrees of partial melting and melt extraction. A single open-system melting event (melting plus percolation of melts produced within upwelling mantle) can explain their highly depleted yet linear chondrite-normalized REE patterns, characterized by a steady depletion from HREE to LREE. Late melt-rock reactions and precipitation of Cpx explains the slightly less depleted compositions of Site 1274 peridotites. Hence, the differences in composition between Sites 1272 and 1274 peridotites do not provide evidence for regional variations in the degrees of partial melting from the south to the north of the FZ. The occurrence of highly refractory peridotites in the Fifteen-Twenty area suggests we sampled a more actively convecting mantle than generally supposed below slow spreading centers.
    Keywords: 209-1272A; 209-1274A; DRILL; Drilling/drill rig; Joides Resolution; Leg209; Ocean Drilling Program; ODP; South Atlantic Ocean
    Type: Dataset
    Format: application/zip, 2 datasets
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  • 4
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    (Table 1) Major element concentrations in abyssal peridotites from ODP Hole 209-1274A (2006)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 209-1274A; Aluminium oxide; Calcium oxide; Calculated; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Iron oxide, Fe2O3; Joides Resolution; Leg209; Loss on ignition; Magnesium number; Magnesium oxide; Manganese oxide; Ocean Drilling Program; ODP; Potassium oxide; Sample code/label; Silicon dioxide; Sodium oxide; South Atlantic Ocean; Titanium dioxide; X-ray fluorescence (XRF)
    Type: Dataset
    Format: text/tab-separated-values, 240 data points
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  • 5
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    (Table 3) Re-Os isotope ratios of abyssal peridotites from ODP Hole 209-1274A (2006)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 209-1274A; Age model; Age model, optional; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Joides Resolution; Leg209; Lithology/composition/facies; Negative-thermal ionization mass spectrometry (N-TIMS); Ocean Drilling Program; ODP; Osmium; Osmium-187/Osmium-188, error; Osmium-187/Osmium-188 ratio; Rhenium; Rhenium-187/Osmium-188 ratio; Sample code/label; South Atlantic Ocean
    Type: Dataset
    Format: text/tab-separated-values, 251 data points
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  • 6
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    (Table 2) Trace element concentrations in abyssal peridotites from ODP Hole 209-1274A (2006)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 209-1274A; Barium; Chromium; Cobalt; Copper; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Dysprosium; Erbium; Hafnium; Holmium; Inductively coupled plasma - mass spectrometry (ICP-MS); Joides Resolution; Leg209; Lutetium; Nickel; Ocean Drilling Program; ODP; Sample code/label; South Atlantic Ocean; Strontium; Uranium; Vanadium; Ytterbium; Zinc; Zirconium
    Type: Dataset
    Format: text/tab-separated-values, 220 data points
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  • 7
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    (Table 4) Re-Os isotope ratios of sulphides from ODP Hole 209-1274A (2006)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 209-1274A; Age model; Age model, optional; Blank effect; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Joides Resolution; Leg209; Mass; Negative-thermal ionization mass spectrometry (N-TIMS); Ocean Drilling Program; ODP; Osmium; Osmium-187/Osmium-188, error; Osmium-187/Osmium-188 ratio; Rhenium; Rhenium-187/Osmium-188 ratio; Sample code/label; South Atlantic Ocean
    Type: Dataset
    Format: text/tab-separated-values, 143 data points
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  • 8
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    (Table 1, Appendix A2) Bulk rock composition of ODP Hole 209-1272A peridotites (2008)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 209-1272A; Aluminium oxide; Barium; Barium, standard deviation; Caesium; Caesium, standard deviation; Calcium oxide; Cerium; Cerium, standard deviation; Chromium; Clinopyroxene; Cobalt; Copper; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Dysprosium; Dysprosium, standard deviation; Erbium; Erbium, standard deviation; Europium; Europium, standard deviation; Gadolinium; Gadolinium, standard deviation; Hafnium; Hafnium, standard deviation; Holmium; Holmium, standard deviation; Inductively coupled plasma - mass spectrometry (ICP-MS); Iron oxide, Fe2O3; Joides Resolution; Lanthanum; Lanthanum, standard deviation; Lead; Lead, standard deviation; Leg209; Lithium; Lithology/composition/facies; Loss on ignition; Lutetium; Lutetium, standard deviation; Magnesium number; Magnesium oxide; Manganese oxide; Neodymium; Neodymium, standard deviation; Nickel; Niobium; Niobium, standard deviation; Ocean Drilling Program; ODP; Olivine; Orthopyroxene; Phosphorus pentoxide; Potassium oxide; Praseodymium; Praseodymium, standard deviation; Rubidium; Rubidium, standard deviation; Sample code/label; Scandium; Silicon dioxide; Sodium oxide; South Atlantic Ocean; Spinel; Strontium; Strontium, standard deviation; Tantalum; Tantalum, standard deviation; Terbium; Terbium, standard deviation; Thorium; Thorium, standard deviation; Thulium; Thulium, standard deviation; Titanium; Titanium dioxide; Uranium; Uranium, standard deviation; X-ray fluorescence (XRF); Ytterbium; Ytterbium, standard deviation; Yttrium; Yttrium, standard deviation; Zirconium; Zirconium, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 666 data points
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  • 9
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    (Table 1, Appendix A2) Bulk rock composition of ODP Hole 209-1274A peridotites (2008)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 209-1274A; Aluminium oxide; Barium; Barium, standard deviation; Caesium; Caesium, standard deviation; Calcium oxide; Cerium; Cerium, standard deviation; Chromium; Clinopyroxene; Cobalt; Copper; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Dysprosium; Dysprosium, standard deviation; Erbium; Erbium, standard deviation; Europium; Europium, standard deviation; Gadolinium; Gadolinium, standard deviation; Hafnium; Hafnium, standard deviation; Holmium; Holmium, standard deviation; Inductively coupled plasma - mass spectrometry (ICP-MS); Iron oxide, Fe2O3; Joides Resolution; Lanthanum; Lanthanum, standard deviation; Lead; Lead, standard deviation; Leg209; Lithium; Lithology/composition/facies; Loss on ignition; Lutetium; Lutetium, standard deviation; Magnesium number; Magnesium oxide; Manganese oxide; Neodymium; Neodymium, standard deviation; Nickel; Niobium; Niobium, standard deviation; Ocean Drilling Program; ODP; Olivine; Orthopyroxene; Phosphorus pentoxide; Potassium oxide; Praseodymium; Praseodymium, standard deviation; Rubidium; Rubidium, standard deviation; Samarium; Samarium, standard deviation; Sample code/label; Scandium; Silicon dioxide; Sodium oxide; South Atlantic Ocean; Spinel; Strontium; Strontium, standard deviation; Tantalum; Tantalum, standard deviation; Terbium; Terbium, standard deviation; Thorium; Thorium, standard deviation; Thulium; Thulium, standard deviation; Titanium; Titanium dioxide; Uranium; Uranium, standard deviation; X-ray fluorescence (XRF); Ytterbium; Ytterbium, standard deviation; Yttrium; Yttrium, standard deviation; Zirconium; Zirconium, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 1132 data points
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  • 10
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    Geochemisty and Re-Os isotope ratios of peridotites from ODP Hole 209-1274A from the Mid-Atlantic ridge (2006)
    PANGAEA
    In:  Supplement to: Harvey, Jason; Gannoun, Abdelmouhcine; Burton, Kevin W; Rogers, Nick; Alard, Olivier; Parkinson, Ian J (2006): Ancient melt extraction from the oceanic upper mantle revealed by Re-Os isotopes in abyssal peridotites from the Mid-Atlantic ridge. Earth and Planetary Science Letters, 244(3-4), 606-621, https://doi.org/10.1016/j.epsl.2006.02.031
    Details
    Publication Date: 2024-01-09
    Description: Comprehensive major-, trace-element and rhenium-osmium (Re-Os) isotope data are presented for abyssal peridotites from Ocean Drilling Program (ODP) Leg 209, in the North Atlantic. The samples are from a single core (Site 1274A) located on the western wall of the axial rift valley of the Mid-Atlantic ridge, and their study allows elemental and isotope information to be precisely related to spatial variations in primary lithology, serpentinisation and seafloor weathering. The harzburgites and dunites at this site are highly serpentinised (with the degree of serpentinisation increasing with depth below the sea floor). Petrographic observations and variations of fluid mobile elements (such as Ba, Sr, U, and Re) are consistent with seawater interaction in the upper part of the core. Nevertheless, major and trace element indicators of the extent of melt depletion indicate extreme melt loss, and suggest that these are amongst the most depleted abyssal peridotites recovered thus far. Despite the evidence for extensive serpentinisation and sea floor weathering all of the samples possess 187Os/188Os isotope compositions that are less radiogenic than estimates for the primitive upper mantle (PUM), lower than any yet reported for abyssal peridotites, and consistent with melt loss over, at least, the past 1.5Ga. Single sulphide Re-Os data show evidence for recent recrystallisation or diffusional modification either due to partial melting or seawater alteration. However, some grains are extremely unradiogenic (187Os/188Os=0.114) providing unequivocal evidence for at least some degree of melt depletion at ca. 2Ga. Taken with recently published data these results suggest that ancient melt depletion may be a widespread feature of the oceanic upper lithosphere, even though evidence for this depleted reservoir has not yet been observed in the Re-Os chemistry of mid-ocean ridge basalts.
    Keywords: 209-1274A; DRILL; Drilling/drill rig; Joides Resolution; Leg209; Ocean Drilling Program; ODP; South Atlantic Ocean
    Type: Dataset
    Format: application/zip, 4 datasets
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