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Noble Gas Isotope Geochemistry of Mid-Ocean Ridge and Ocean Island Basalts: Characterization of Mantle Source Reservoirs
The study of noble gases in oceanic basalts is central to understanding chemical heterogeneity of the Earth’s mantle and origin of the atmosphere. In the terrestrial environment the abundances ofExpand
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Erosion of lithospheric mantle beneath the East African Rift system: geochemical evidence from the Kivu volcanic province
Abstract This study presents new major and trace element and Sr–Nd isotopic results for a suite of Miocene–Recent mafic lavas from the Kivu volcanic province in the western branch of the East AfricanExpand
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Lead and Helium Isotope Evidence from Oceanic Basalts for a Common Deep Source of Mantle Plumes
Linear arrays in lead isotope space for mid-ocean ridge basalts (MORBs) converge on a single end-member component that has intermediate lead, strontium, and neodymium isotope ratios compared with theExpand
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Seismic and geochemical evidence for large-scale mantle upwelling beneath the eastern Atlantic and western and central Europe
Seismic tomography and the isotope geochemistry of Cenozoic volcanic rocks suggest the existence of a large, sheet-like region of upwelling in the upper mantle which extends from the eastern AtlanticExpand
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Mid-ocean ridge popping rocks: implications for degassing at ridge crests
The vesicle size distribution (VSD) and rare gas abundances in popping rocks from 14°N on the Mid-Atlantic Ridge provide constraints on the behavior of volatiles during ridge crest volcanism. TheseExpand
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Magmatic and amagmatic seafloor generation at the ultraslow-spreading Gakkel ridge, Arctic Ocean
A high-resolution mapping and sampling study of the Gakkel ridge was accomplished during an international ice-breaker expedition to the high Arctic and North Pole in summer 2001. For thisExpand
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Carbon and oxygen isotopic disequilibria of recent deep-sea benthic foraminifera☆
Abstract The carbon and oxygen isotopic compositions of 149 samples of benthic foraminifera from deep-sea core tops indicate that none of the nine species studied secrete calcium carbonate inExpand
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Discovery of abundant hydrothermal venting on the ultraslow-spreading Gakkel ridge in the Arctic Ocean
Submarine hydrothermal venting along mid-ocean ridges is an important contributor to ridge thermal structure, and the global distribution of such vents has implications for heat and mass fluxes fromExpand
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Correlated geophysical, geochemical, and volcanological manifestations of plume-ridge interaction along the Galápagos Spreading Center
[1] As the Galapagos hot spot is approached from the west along the Galapagos Spreading Center there are systematic increases in crustal thickness and in the K/Ti, Nb/Zr, 3He/4He, H2O, and Na2OExpand
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Helium isotope composition of the early Iceland mantle plume inferred from the Tertiary picrites of West Greenland
Picrites from the 61 million year old Vaigat Formation of the Nuussuaq Peninsula in West Greenland have 3 He= 4 He ratios trapped in olivine phenocrysts which range up to 30 times the atmosphericExpand
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