hafnium isotope geochronology

  • U–Pb geochronology and Hf–Nd isotope compositions of

    2003-3-30 · The Cadomian orogen includes a belt of late Neoproterozoic–Cambrian rocks exposed in the North Armorican Massif of northern France and in the British Channel Islands ().The orogen is of particular importance to our understanding of the evolution of the major Neoproterozoic circum-Atlantic terranes as it is the only one with exposed Paleoproterozoic (2.0 Ga) basement (e.g. ) and because

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  • Geochronology Petrogenesis and Oxidation State of the

    Whole-rock Sr-Nd isotope compositions of the Goonumbla Wombin and ore-associated suites are similar with (87 Sr/ 86 Sr) i = 0.704112 to 0.704424 and ε Nd = 5.6 to 6.9 which is typical of primitive intraoceanic island arcs and their Pb isotope values lie within the MORB array.

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  • Hafnium-Neodymium isotope trace element and U-Pb

    2020-12-1 · Hf-Nd whole-rock isotope systematics. Whole-rock Hafnium and Neodymium isotope compositions and element concentrations for ultramafic mafic and felsic volcanic and metasedimentary rocks are reported in Table 1 Table 2. The ultramafic rocks have Lu and Hf concentrations between 0.026 µg/g to 0.13 µg/g and 0.045 µg/g to 0.95 µg/g respectively.

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  • Detrital zircon geochronology and Hf isotope geochemistry

    Sedimentary strata along convergent margins provide a record of subduction-related magmatism oceanic plateau and arc collisional processes and regional sediment transport pathways (e.g. Dickinson 1974 Ingersoll 1979 Plafker and Berg 1994 Surpless et al. 2014 Stevens Goddard et al. 2018).Recent advances in techniques such as detrital zircon geochronology and Hf isotope analyses have

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  • Geochronology Recent Development in the Lutetium-176

    The application of the lutetium-176/ hafnium-176 method to gram quantities of minerals containing rare earths is made possible by the development of analytical and isotope dilution techniques for microgram amounts of lutetium and hafnium. The geological redetermination of the half-life of lutetium-176 (3.3 ± 0.5 x 1010 years) is in agreement with recent physical measurements.

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  • Determination of the isotopic composition of hafnium using

    2019-7-23 · MIF in MC-ICPMS. Most studies of hafnium isotopic composition focus on a single isotope ratio ( R176/177) and the results of this isotope ratio are internally normalized to a fixed assumed value e.g. R179/177 = 0.7325 using exponential mass fractionation model ( n = 1) Regression model calibrates each isotope ratio of hafnium separately

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  • Geochronology trace elements and Hf isotopic geochemistry

    As hafnium is most compatible with zircon the ages determined by the U–Pb dating are also used for the Lu–Hf isotope system which is the best choice for determining the evolution of igneous and metamorphic rocks in collisional zones . Lu is least compatible with the zircon while hafnium and zirconium are geochemically similar and 1–4

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  • Zircon lutetium hafnium isotope map of Western Australia

    2021-7-9 · exploration datasets. The Zircon lutetium–hafnium isotope map digital data are also available as a free download from the Data and Software Centre via Datasets — Statewide spatial datasets — Geochronology Isotope Geology — Zircon lutetium-hafnium isotope map as ESRI shapefiles and MapInfo TAB files.

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  • Determination of the isotopic composition of hafnium using

    2019-7-23 · MIF in MC-ICPMS. Most studies of hafnium isotopic composition focus on a single isotope ratio ( R176/177) and the results of this isotope ratio are internally normalized to a fixed assumed value e.g. R179/177 = 0.7325 using exponential mass fractionation model ( n = 1) Regression model calibrates each isotope ratio of hafnium separately

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  • New geochemical U–Pb SIMS geochronology and Lu–Hf

    2021-6-1 · In accordance with their most concordant U–Pb ages zircons of the granodiorite and gneiss were selected for Hafnium isotope measurements at the Geochronology and Isotope Geochemistry-SGIker facility of the University of the Basque Country UPV/EHU Spain using a Neptune MC-ICP-MS (Thermo Fisher Scientific) coupled to an UP-213 (New Wave

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  • Geochronology recent development in the lutetium-176

    2018-7-3 · The application of the lutetium-176/ hafnium-176 method to gram quantities of minerals containing rare earths is made possible by the development of analytical and isotope dilution techniques for microgram amounts of lutetium and hafnium.

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  • Detrital zircon U-Pb geochronology and Hf isotope

    Hafnium isotope compositions are used to determine the geochemical character of the magma in which the zircons crystallized. When combined with U-Pb ages Hf isotope composition provides a powerful complement for interpreting sedimentary provenance ( Bahlburg et al. 2011 Gehrels and Pecha 2014 ).

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  • Research Data JCUHafnium isotope data for the Simuku

    2021-5-27 · Hafnium isotope data for the Simuku Igneous Complex New Britain Papua New Guinea. Hafnium isotope data related to "Melanesian arc far-field response to collision of the Ontong Java Plateau geochronology and petrogenesis of the Simuku Igneous Complex New Britain Papua New Guinea". Understanding the evolution of the mid-Cenozoic Melanesian

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  • Geochronology Recent Development Lutetium

    isotope dilution value. The precision Hf measurement is nobetter than 10 percent (2a) for sev-eral reasons including the instability of theion current isobaric interfer-ence of the rare earths the poor en-richment of the Hf spike and the low content of radiogenic 176Hf in the gadolinite. For the common hafnium correction the measured

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  • Zircon M127 AHomogeneousReferenceMaterialforSIMS

    2016-12-2 · SIMS in combination with hafnium and stable isotope (oxygen and potentially also lithium) determination. Keywords zircon reference material SIMS U–Pb geochronology oxygen isotopes hafnium isotopes lithium isotopes. l age (U-Th)/He de 426 ± 7 Ma (2s) ce qui est typique d un zircon du Sri Lanka non chauff e nous permettent

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  • Zircon M127 A Homogeneous Reference Material for

    2018-11-20 · SIMS in combination with hafnium and stable isotope (oxygen and potentially also lithium) determination. Keywords zircon reference material SIMS U–Pb geochronology oxygen isotopes hafnium isotopes lithium isotopes. l age (U-Th)/He de 426 ± 7 Ma (2s) ce qui est typique d un zircon du Sri Lanka non chauffe nous permettent

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  • U–Pb geochronology and Hf–Nd isotope compositions of

    2003-3-30 · The Cadomian orogen includes a belt of late Neoproterozoic–Cambrian rocks exposed in the North Armorican Massif of northern France and in the British Channel Islands ().The orogen is of particular importance to our understanding of the evolution of the major Neoproterozoic circum-Atlantic terranes as it is the only one with exposed Paleoproterozoic (2.0 Ga) basement (e.g. ) and because

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  • Zircon M127A Homogeneous Reference Material for SIMS

    2016-5-17 · Zircon M127A Homogeneous Reference Material for SIMS U–Pb Geochronology Combined with Hafnium Oxygen and Potentially Lithium Isotope Analysis. Lutz Nasdala. Corresponding Author. E-mail address lutz.nasdala univie.ac.at. Institut für Mineralogie und Kristallographie Universität Wien 1090 A Wien Austria.

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  • Geochronology Recent Development Lutetium

    isotope dilution value. The precision Hf measurement is nobetter than 10 percent (2a) for sev-eral reasons including the instability of theion current isobaric interfer-ence of the rare earths the poor en-richment of the Hf spike and the low content of radiogenic 176Hf in the gadolinite. For the common hafnium correction the measured

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  • U-PB ZIRCON AND MONAZITE GEOCHRONOLOGY AND

    2019-4-22 · Hf isotope data from the high Sr/Y suite range from -14.6 to 5.6. I propose that the transition from Neoacadian low Sr/Y mid-crustal partial melting to Early Alleghanian high Sr/Y deep crustal partial melting reflects thickening of the EBR during Neoacadian deformation. Hf isotope values also transition from crustal values (- Hf) to a mixed

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  • Geochronology trace elements and Hf isotopic geochemistry

    As hafnium is most compatible with zircon the ages determined by the U–Pb dating are also used for the Lu–Hf isotope system which is the best choice for determining the evolution of igneous and metamorphic rocks in collisional zones . Lu is least compatible with the zircon while hafnium and zirconium are geochemically similar and 1–4

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  • Isotope Geochemistry and Geochronology Research Centre

    2021-1-15 · Isotope Geochemistry Geochronology Research Centre Carleton University Welcome to the Isotope Geochemistry and Geochronology Research Centre (IGGRC) at Carleton University Ottawa Canada. Here you will find information about our facilities

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  • Geochronology trace elements and Hf isotopic geochemistry

    As hafnium is most compatible with zircon the ages determined by the U–Pb dating are also used for the Lu–Hf isotope system which is the best choice for determining the evolution of igneous and metamorphic rocks in collisional zones . Lu is least compatible with the zircon while hafnium and zirconium are geochemically similar and 1–4

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  • OXYGEN AND HAFNIUM ISOTOPE GEOCHEMISTRY OF

    2014-12-16 · U-Pb Geochronology and Hafnium Isotope Geochemistry U/Pb ages from seven samples within the Crawfish Inlet pluton and one sample from a small satellite sill (CP13-08) range from 47.3±1.2 to 53.1±0.8 Ma. Sample KP13-01 from the Krestof pluton yields an

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  • New geochemical U–Pb SIMS geochronology and Lu–Hf

    2021-6-1 · In accordance with their most concordant U–Pb ages zircons of the granodiorite and gneiss were selected for Hafnium isotope measurements at the Geochronology and Isotope Geochemistry-SGIker facility of the University of the Basque Country UPV/EHU Spain using a Neptune MC-ICP-MS (Thermo Fisher Scientific) coupled to an UP-213 (New Wave

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  • Research Data JCUHafnium isotope data for the Simuku

    2021-5-27 · Hafnium isotope data for the Simuku Igneous Complex New Britain Papua New Guinea. Hafnium isotope data related to "Melanesian arc far-field response to collision of the Ontong Java Plateau geochronology and petrogenesis of the Simuku Igneous Complex New Britain Papua New Guinea". Understanding the evolution of the mid-Cenozoic Melanesian

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  • Three‐Dimensional Evolution of the Early Paleozoic Western

    2017-9-18 · Uranium-lead (U-Pb) geochronology and Hafnium (Hf) isotope geochemistry of detrital zircons of the Harmony Formation of north central Nevada provide new insights into the tectonic evolution of the Late Paleozoic western Laurentian margin. Using laser-ablation inductively coupled plasma mass spectrometry 10 arenite samples were analyzed for U

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  • U-Th-Pb Geochronology and Lu-Hf Isotope Geochemistry of

    2020-9-14 · Michelle N. Dafov Anahi Carrera George E. Gehrels Dan Alberts Mekha Pereira M. Robinson Cecil Margaret E. Rusmore Harold H. Stowell Glenn J. Woodsworth U-Th-Pb Geochronology and Lu-Hf Isotope Geochemistry of Detrital Zircons in Metasedimentary Rocks of the Southern Coast Mountains Batholith .

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  • U-Th-Pb Geochronology and Lu-Hf Isotope Geochemistry of

    2020-9-14 · Michelle N. Dafov Anahi Carrera George E. Gehrels Dan Alberts Mekha Pereira M. Robinson Cecil Margaret E. Rusmore Harold H. Stowell Glenn J. Woodsworth U-Th-Pb Geochronology and Lu-Hf Isotope Geochemistry of Detrital Zircons in Metasedimentary Rocks of the Southern Coast Mountains Batholith .

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  • Geochronology Recent Development Lutetium

    isotope dilution value. The precision Hf measurement is nobetter than 10 percent (2a) for sev-eral reasons including the instability of theion current isobaric interfer-ence of the rare earths the poor en-richment of the Hf spike and the low content of radiogenic 176Hf in the gadolinite. For the common hafnium correction the measured

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  • U–Pb geochronology and Hf isotope ratios of magmatic

    2008-9-30 · Hafnium isotope analysis. For Hf isotope analysis of zircons masses 172 to 179 were measured in Faraday collectors. Ablation conditions were beam diameter 55 μm (aperture imaging mode) pulse frequency 5 Hz beam energy density 1 J/cm 2. Each ablation was preceded by a 30 s on-mass background measurement.

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  • Geochronology trace elements and Hf isotopic geochemistry

    As hafnium is most compatible with zircon the ages determined by the U–Pb dating are also used for the Lu–Hf isotope system which is the best choice for determining the evolution of igneous and metamorphic rocks in collisional zones . Lu is least compatible with the zircon while hafnium and zirconium are geochemically similar and 1–4

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  • Geochronology and Isotopic Mapping Exploring for the

    2021-4-15 · The Geochronology and Isotopic Mapping component of the Exploring for the Future program provides key isotopic datasets in both tabulated compilations and map form for visualisation with other geological datasets. Geochronology and Isotopic Mapping provides geologists with an understanding of the changing nature of the geology of northern

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  • U-Th-Pb Geochronology and Lu-Hf Isotope Geochemistry of

    2020-9-14 · Michelle N. Dafov Anahi Carrera George E. Gehrels Dan Alberts Mekha Pereira M. Robinson Cecil Margaret E. Rusmore Harold H. Stowell Glenn J. Woodsworth U-Th-Pb Geochronology and Lu-Hf Isotope Geochemistry of Detrital Zircons in Metasedimentary Rocks of the Southern Coast Mountains Batholith .

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  • Geochronology Recent Development Lutetium

    isotope dilution value. The precision Hf measurement is nobetter than 10 percent (2a) for sev-eral reasons including the instability of theion current isobaric interfer-ence of the rare earths the poor en-richment of the Hf spike and the low content of radiogenic 176Hf in the gadolinite. For the common hafnium correction the measured

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  • OXYGEN AND HAFNIUM ISOTOPE GEOCHEMISTRY OF

    2014-12-16 · U-Pb Geochronology and Hafnium Isotope Geochemistry U/Pb ages from seven samples within the Crawfish Inlet pluton and one sample from a small satellite sill (CP13-08) range from 47.3±1.2 to 53.1±0.8 Ma. Sample KP13-01 from the Krestof pluton yields an

    Chat Online
  • Zircon M127 AHomogeneousReferenceMaterialforSIMS

    2016-12-2 · SIMS in combination with hafnium and stable isotope (oxygen and potentially also lithium) determination. Keywords zircon reference material SIMS U–Pb geochronology oxygen isotopes hafnium isotopes lithium isotopes. l age (U-Th)/He de 426 ± 7 Ma (2s) ce qui est typique d un zircon du Sri Lanka non chauff e nous permettent

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  • Determination of the isotopic composition of hafnium using

    2019-7-23 · MIF in MC-ICPMS. Most studies of hafnium isotopic composition focus on a single isotope ratio ( R176/177) and the results of this isotope ratio are internally normalized to a fixed assumed value e.g. R179/177 = 0.7325 using exponential mass fractionation model ( n = 1) Regression model calibrates each isotope ratio of hafnium separately

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