Geochemical variations in mid-ocean ridge basalts have been attributed to differing proportions of compositionally distinct mantle components in their sources, some of which may be recycled crust. Oxygen isotopes are strongly fractionated by near-surface interactions of rocks with the hydrosphere, and thus provide a tracer of near-surface materials that have been recycled into the mantle. We present here oxygen isotope analyses of basaltic glasses from the mid-Atlantic ridge south of and across the Azores platform. Variations in δ^(18)O in these samples are subtle (range of 0.47‰) and may partly reflect shallow fractional crystallization; we present a method to correct for these effects. Relatively high fractionation-corrected δ^(18)O in th...
The hypothesis that subducted sediments survive dehydration and/or melting in subduction zones to be...
The subduction of oceanic lithosphere is thought to enrich the mantle in elements concentrated in al...
New major and trace element and Sr–Nd–Pb isotope data have been determined for 21 basaltic samples f...
A long-wavelength geochemical gradient in Mid-Atlantic Ridge (MAR) samples collected between 33 and...
Mid-ocean-ridge basalts (MORBs) are the most abundant terrestrial magmas and are believed to form by...
Oxygen isotope ratios of olivine have become a widely used tool for the study of magmatic systems, e...
Recycling of oceanic crust into the deep mantle via subduction is a widely accepted mechanism for cr...
Oxygen isotope ratios are reported for olivine phenocrysts from sixty-seven samples of ocean island ...
The Azores archipelago in the central North Atlantic has been studied wideley over the last few deca...
Partial melting of Earth’s mantle generates oceanic crust and leaves behind a chemically depleted re...
The decay of 187Re to 187Os provides a unique tracer of recycled lithosphere in the Earth's upper ma...
The hypothesis that subducted sediments survive dehydration and/or melting in subduction zones to be...
The subduction of oceanic lithosphere is thought to enrich the mantle in elements concentrated in al...
New major and trace element and Sr–Nd–Pb isotope data have been determined for 21 basaltic samples f...
A long-wavelength geochemical gradient in Mid-Atlantic Ridge (MAR) samples collected between 33 and...
Mid-ocean-ridge basalts (MORBs) are the most abundant terrestrial magmas and are believed to form by...
Oxygen isotope ratios of olivine have become a widely used tool for the study of magmatic systems, e...
Recycling of oceanic crust into the deep mantle via subduction is a widely accepted mechanism for cr...
Oxygen isotope ratios are reported for olivine phenocrysts from sixty-seven samples of ocean island ...
The Azores archipelago in the central North Atlantic has been studied wideley over the last few deca...
Partial melting of Earth’s mantle generates oceanic crust and leaves behind a chemically depleted re...
The decay of 187Re to 187Os provides a unique tracer of recycled lithosphere in the Earth's upper ma...
The hypothesis that subducted sediments survive dehydration and/or melting in subduction zones to be...
The subduction of oceanic lithosphere is thought to enrich the mantle in elements concentrated in al...
New major and trace element and Sr–Nd–Pb isotope data have been determined for 21 basaltic samples f...