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Oceanic crustal thickness from seismic measurements and rare earth element inversions
Seismic refraction results show that the igneous section of oceanic crust averages 7.1±0.8 km thick away from anomalous regions such as fracture zones and hot-spots, with extremal bounds of 5.0–8.5Expand
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A Sm-Nd isotopic study of atmospheric dusts and particulates from major river systems
143Nd/144Nd ratios, and Sm and Nd abundances, are reported for particulates from major and minor rivers of the Earth, continental sediments, and aeolian dusts collected over the Atlantic, Pacific,Expand
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Mg isotopic composition of carbonate: insight from speleothem formation
Simultaneous high-precision measurement of 24 Mg, 25 Mg and 26 Mg isotopic compositions were made by multiple collector inductively coupled mass spectrometry (MC-ICP-MS) relative to the internationalExpand
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Rare-earth abundances in chondritic meteorites
Abstract Fifteen chondrites, including eight carbonaceous chondrites, have been analyzed for rare earth element (REE) abundances by isotope dilution. These analyses complement and extend earlierExpand
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Sm-Nd studies of Archaean metasediments and metavolcanics from West Greenland and their implications for the Earth's early history
Metasedimentary and metavolcanic rocks from the Archaean of West Greenland have been examined for evidence of crustal components greater than 3.8 Ga in age and for their compatibility with theExpand
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Determination of natural Cu-isotope variation by plasma-source mass spectrometry: implications for use as geochemical tracers
Abstract Techniques for the high precision measurement of 65 Cu/ 63 Cu ratios by multiple-collector plasma-source mass spectrometry has been developed. Two approaches, namely Zn-doping andExpand
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Mass fractionation processes of transition metal isotopes
Recent advances in mass spectrometry make it possible to utilise isotope variations of transition metals to address some important issues in solar system and biological sciences. Realisation of theExpand
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The formation of chondrules at high gas pressures in the solar nebula.
High-precision magnesium isotope measurements of whole chondrules from the Allende carbonaceous chondrite meteorite show that some aluminum-rich Allende chondrules formed at or near the time ofExpand
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Closure of the Central American Isthmus and its effect on deep-water formation in the North Atlantic
Modern ocean thermohaline-driven circulation influences global climate by transporting heat to high latitudes1,2 and by affecting the exchange of CO2 between ocean and atmosphere3. North AtlanticExpand
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