Zobrazeno 1 - 10 of 13 pro vyhledávání: '"Tanya A. Ewing"'
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Paleocene metamorphism along the Pennine–Austroalpine suture constrained by U–Pb dating of titanite and rutile (Malenco, Alps)
Autor: Othmar Müntener, Suzanne Picazo, Tanya A. Ewing
Publikováno v: Swiss Journal of Geosciences. 112:517-542
We present in situ rutile and titanite U–Pb geochronology for three samples from the Ur breccia, which forms the boundary between the Malenco unit and the Margna nappe (Eastern Central Alps) near Pass d’Ur in southeast Switzerland. These sampled
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8c245d8f351b25b92ffa109b11bc9a39
https://doi.org/10.1007/s00015-019-00346-1
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3
U − Pb geochronology of epidote by laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) as a tool for dating hydrothermal-vein formation
Autor: Tanya A. Ewing, Veronica Peverelli, Pierre Lanari, Daniela Rubatto, Alfons Berger, Martin Wille, Marco Herwegh, Igor M. Villa, Thomas Pettke
Publikováno v: Geochronology, Vol 3, Pp 123-147 (2021)
Peverelli, Veronica; Ewing, Tanya; Rubatto, Daniela; Wille, Martin; Berger, Alfons; Villa, Igor Maria; Lanari, Pierre; Pettke, Thomas; Herwegh, Marco (2021). U − Pb geochronology of epidote by laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) as a tool for dating hydrothermal-vein formation. Geochronology, 3(1), pp. 123-147. Copernicus Publications 10.5194/gchron-3-123-2021
Epidote – here defined as minerals belonging to the epidote–clinozoisite solid solution – is a low-μ (μ=238U/204Pb) mineral occurring in a variety of geological environments and participating in many metamorphic reactions that is stable throu
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::498c8302e5816574a4aad01a673501b3
https://gchron.copernicus.org/articles/3/123/2021/
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4
U–Pb geochronology of epidote by LA–ICP–MS as a tool for dating hydrothermal-vein formation
Autor: Thomas Pettke, Martin Wille, Daniela Rubatto, Igor M. Villa, Veronica Peverelli, Marco Herwegh, Tanya A. Ewing, Pierre Lanari, Alfons Berger
Monoclinic epidote is a low-µ (µ = 283U / 204Pb) mineral occurring in a variety of geological environments, participating in many metamorphic reactions and stable throughout a wide range of pressure–temperature conditions. Despite contain
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d724ab41fb9ceb7a363554b39cc63ce5
https://gchron.copernicus.org/preprints/gchron-2020-27/
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5
The Kuunga Orogeny in the Eastern Ghats Belt: Evidence from geochronology of biotite, amphibole and rutile, and implications for the assembly of Gondwana
Autor: Emelie Sofia Axelsson, Klaus Mezger, Tanya A. Ewing
Publikováno v: Precambrian Research. 347:105805
The Eastern Ghats Belt, India, is a high grade polymetamorphic terrane; most of it was metamorphosed under high temperature to ultra-high temperature (UHT) conditions at 1000–900 Ma. This study presents new Rb–Sr biotite, 40Ar–39Ar amphibole an
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7226d605baf9a1279ff057bb74837080
https://doi.org/10.1016/j.precamres.2020.105805
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7
The mantle source of island arc magmatism during early subduction: Evidence from Hf isotopes in rutile from the Jijal Complex (Kohistan arc, Pakistan)
Autor: Tanya A. Ewing, Othmar Müntener
The Cretaceous–Paleogene Kohistan arc complex, northern Pakistan, is renowned as one of the most complete sections through a preserved paleo-island arc. The Jijal Complex represents a fragment of the plutonic roots of the Kohistan arc, formed durin
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::110321c3cf190a6366d285ece5d979d3
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8
Source and fractionation controls on subduction-related plutons and dike swarms in southern Patagonia (Torres del Paine area) and the low Nb/Ta of upper crustal igneous rocks
Autor: Mélina Manzini, Thibaud Roux, Tanya A. Ewing, Pierre Pellaud, Othmar Müntener, Luc Allemann, Lukas P. Baumgartner
Publikováno v: Müntener, Othmar; Ewing, Tanya A.; Baumgartner, Lukas P.; Manzini, Mélina; Roux, Thibaud; Pellaud, Pierre; Allemann, Luc (2018). Source and fractionation controls on subduction-related plutons and dike swarms in southern Patagonia (Torres del Paine area) and the low Nb/Ta of upper crustal igneous rocks. Contributions to mineralogy and petrology, 173(5), p. 38. Springer-Verlag 10.1007/s00410-018-1467-0
Contributions to Mineralogy and Petrology. Beitrage Zur Mineralogie Und Petrologie
The subduction system in southern Patagonia provides direct evidence for the variability of the position of an active continental arc with respect to the subducting plate through time, but the consequences on the arc magmatic record are less well stu
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9
Hafnium isotopes and Zr/Hf of rutile and zircon from lower crustal metapelites (Ivrea–Verbano Zone, Italy): Implications for chemical differentiation of the crust
Autor: Daniela Rubatto, Jörg Hermann, Tanya A. Ewing
Publikováno v: Earth and Planetary Science Letters. 389:106-118
We have used granulite facies metapelites from the classic Ivrea–Verbano Zone (IVZ) lower crustal section, northern Italy, to investigate the behaviour of the hafnium (Hf) isotope system in rutile and zircon under conditions of high temperature (70
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a74e9a9a5e262b4164cbf31981d25329
https://doi.org/10.1016/j.epsl.2013.12.029
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10
In situ measurement of hafnium isotopes in rutile by LA–MC-ICPMS: Protocol and applications
Autor: Stephen Eggins, Joerg Hermann, Tanya A. Ewing, Daniela Rubatto
Publikováno v: Chemical Geology. 281:72-82
This work presents a rigorous assessment of the accuracy and precision with which 176Hf/177Hf can be measured in rutile by laser ablation (LA) MC-ICPMS. For rutile with ≥ 40 ppm Hf, we demonstrate that 176Hf/177Hf can be measured accurately and rep
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ed1ebfd00a99a613a588f56a019cece1
https://doi.org/10.1016/j.chemgeo.2010.11.029
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