de.pangaea.dataset755695 und dataset PANGAEA

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https://www.pangaea.de/ information pointOfContact 2026-02-06T10:45:05Z https://doi.pangaea.de/10.1594/PANGAEA.755695 1990-01-01 publication https://doi.org/10.1594/PANGAEA.755695 Greenough, John D author Fryer, Brian J author PANGAEA

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https://www.pangaea.de/ information publisher tableDigital Supplement to: Greenough, John D; Fryer, Brian J (1990): Distribution of gold, palladium, platinum, rhodium, ruthenium, and iridium in Leg 115 hotspot basalts: implications for magmatic processes. In: Duncan, RA; Backmann, J; Peterson, LC; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 115, 71-84, https://doi.org/10.2973/odp.proc.sr.115.128.1990 A comparison of 50 basalts recovered at Sites 706, 707, 713, and 715 along the Reunion hotspot trace during Ocean Drilling Program Leg 115 in the Indian Ocean shows that seafloor alteration had little effect on noble metal concentrations (Au, Pd, Pt, Rh, Ru, and Ir), determined by inductively coupled plasma-mass spectrometry (ICP-MS), which generally tend to decrease with magma evolution. Their compatible-element behavior may be related to the precipitation of Ir-Os-based alloys, chromite, sulfides, and/or olivine and clinopyroxene in some combination. The simplest explanation indicates silicate control of concentrations during differentiation. Basalts from the different sites show varying degrees of alkalinity. Noble metal abundances tend to increase with decreasing basalt alkalinity (i.e., with increasing percentages of mantle melting), indicating that the metals behave as compatible elements during mantle melting. The retention of low-melting-point Au, Pd, and Rh in mantle sulfides, which mostly dissolve before significant proportions of Ir-Os-based alloys melt, explains increasing Pd/Ir ratios with decreasing alkalinity (increasing melting percentages) in oceanic basalts. High noble metal concentrations in Indian Ocean basalts (weighted averages of Au, Pd, Rh, Pt, Ru, and Ir in Leg 115 basalts are 3.2, 8.1, 0.31, 7.3, 0.22, and 0.11 ppb, respectively), compared with basalts from some other ocean basins, may reflect fundamental primary variations in upper- mantle noble metal abundances completed Greenough, John D principalInvestigator ODP Ocean Drilling Program theme 1995-01-01 creation PANGAEA

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https://www.pangaea.de/ information pointOfContact copyright copyright CC-BY-3.0: Creative Commons Attribution 3.0 Unported textTable und geoscientificInformation 59.0168 73.8313 -13.114 5.0815 1987-05-22T23:15:00 1987-06-28T07:45:00 Event label thematicClassification Sample code/label thematicClassification DSDP/ODP/IODP sample designation Lithologic unit/sequence thematicClassification Gold physicalMeasurement ng/kg ng/kg Palladium physicalMeasurement ng/kg ng/kg Rhodium physicalMeasurement ng/kg ng/kg Platinum physicalMeasurement ng/kg ng/kg Ruthenium physicalMeasurement ng/kg ng/kg Iridium physicalMeasurement ng/kg ng/kg text/tab-separated-values unknown https://doi.pangaea.de/10.1594/PANGAEA.755695?format=textfile download dataset The data set was checked for completeness, correctness, and consistency of metainformation. Validity of used methods was checked and - if applicable - precision and range of data. EVENT LABEL: 115-706A * LATITUDE: -13.114000 * LONGITUDE: 61.371000 * DATE/TIME START: 1987-05-22T23:15:00 * DATE/TIME END: 1987-05-23T08:00:00 * ELEVATION: -2517.0 m * Penetration: 47.5 m * Recovery: 39.28 m * LOCATION: South Indian Ridge, South Indian Ocean * CAMPAIGN: Leg115 * BASIS: Joides Resolution * METHOD/DEVICE: Drilling/drill rig 6 cores; 47.5 m cored; 0 m drilled; 82.7 % recovery 1987-05-22T23:15:00 EVENT LABEL: 115-706C * LATITUDE: -13.114000 * LONGITUDE: 61.371000 * DATE/TIME START: 1987-05-24T03:30:00 * DATE/TIME END: 1987-05-26T00:45:00 * ELEVATION: -2518.0 m * Penetration: 121.7 m * Recovery: 19.72 m * LOCATION: South Indian Ridge, South Indian Ocean * CAMPAIGN: Leg115 * BASIS: Joides Resolution * METHOD/DEVICE: Drilling/drill rig 8 cores; 77.4 m cored; 0 m drilled; 25.5 % recovery 1987-05-24T03:30:00 EVENT LABEL: 115-707C * LATITUDE: -7.545300 * LONGITUDE: 59.016800 * DATE/TIME START: 1987-05-29T10:30:00 * DATE/TIME END: 1987-06-02T03:30:00 * ELEVATION: -1552.0 m * Penetration: 443.2 m * Recovery: 91.56 m * LOCATION: South Indian Ridge, South Indian Ocean * CAMPAIGN: Leg115 * BASIS: Joides Resolution * METHOD/DEVICE: Drilling/drill rig 27 cores; 259.4 m cored; 0 m drilled; 35.3 % recovery 1987-05-29T10:30:00 EVENT LABEL: 115-713A * LATITUDE: -4.193000 * LONGITUDE: 73.394200 * DATE/TIME START: 1987-06-16T23:30:00 * DATE/TIME END: 1987-06-20T09:15:00 * ELEVATION: -2920.0 m * Penetration: 191.7 m * Recovery: 114.98 m * LOCATION: Indian Ocean * CAMPAIGN: Leg115 * BASIS: Joides Resolution * METHOD/DEVICE: Drilling/drill rig 22 cores; 191.7 m cored; 0 m drilled; 60 % recovery 1987-06-16T23:30:00 EVENT LABEL: 115-715A * LATITUDE: 5.081500 * LONGITUDE: 73.831300 * DATE/TIME START: 1987-06-24T16:00:00 * DATE/TIME END: 1987-06-28T07:45:00 * ELEVATION: -2273.0 m * Penetration: 287.8 m * Recovery: 137.62 m * LOCATION: Lakshadweep Sea * CAMPAIGN: Leg115 * BASIS: Joides Resolution * METHOD/DEVICE: Drilling/drill rig 31 core; 287.8 m cored; 0 m drilled; 47.8 % recovery 1987-06-24T16:00:00