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Hafnium isotope characterization of the GJ-1 zircon reference material by solution and laser-ablation MC-ICPMS
Abstract Twenty four splits from two different GJ-1 reference material zircon crystals were analyzed for their Lu and Hf concentrations, Lu/Hf and Hf isotopic compositions by solution ID-MC-ICPMS.Expand
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Evaluation of the 87Rb decay constant by age comparison against the U-Pb system
Abstract The Rb–Sr decay system is one of the most widely used geochronometers for obtaining ages and cooling rates of terrestrial magmatic, metamorphic, and hydrothermal events. It has also beenExpand
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Combined Separation of Cu, Fe and Zn from Rock Matrices and Improved Analytical Protocols for Stable Isotope Determination
Isotope ratios of heavy elements vary on the 1/10000 level in high temperature materials, providing a fingerprint of the processes behind their origin. Ensuring that the measured isotope ratio isExpand
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Iron isotope systematics in planetary reservoirs
Abstract Iron is the only polyvalent major element, and controls reduction–oxidation (redox) reactions in a host of geologic processes and reservoirs, from the mineral- to planetary-scale, on EarthExpand
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Petrogenesis and Geochemistry of Archean Komatiites
Komatiites are products of decompression melting of mantle so hot that they are almost exclusively restricted to the Archean. The high degree of partial melting (F) and pressure (P) required forExpand
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Initial Hf isotope compositions in magmatic zircon from early Proterozoic rocks from the Gawler Craton, Australia: A test for zircon model ages
Abstract We evaluate the validity of age information obtained from two-stage Hf model ages in zircon. Multiple isotope investigations of minerals from the Kiana Granite of the Archean SleafordianExpand
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Redox-variability and controls in subduction zones from an iron-isotope perspective
Abstract An ongoing controversy in mantle geochemistry concerns the oxidation state of the sources of island arc lavas (IAL). Three key factors control oxidation–reduction (redox) of IAL sources: (i)Expand
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Reworking of Earth's first crust: Constraints from Hf isotopes in Archean zircons from Mt. Narryer, Australia
Abstract Discoveries of >4 Ga old zircon grains in the northwest Yilgarn of Western Australia led to the conclusion that evolved crust formed on the Earth within the first few 100 Ma after accretion.Expand
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Hafnium and iron isotopes in early Archean komatiites record a plume-driven convection cycle in the Hadean Earth
Abstract Archean (>2.5 billion years) komatiites are considered expressions of mantle plumes that originate from and thereby sample the lowermost mantle overlying the Earth's core. Some komatiitesExpand
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The role of detrital zircons in Hadean crustal research
Abstract Meso-Archean sedimentary sequences at Mt. Narryer and the Jack Hills of the Narryer Terrane in Western Australia's Yilgarn Craton contain detrital zircon grains with ages as old as 4.37 Ga,Expand
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