Výsledky vyhledávání - "Amelia J. Davies"

Akademický článek

Dual clumped isotopes from Mid-Eocene bivalve shell reveal a hot and summer wet climate of the Paris Basin

Autor: Jorit F. Kniest, Amelia J. Davies, Julia Brugger, Jens Fiebig, Miguel Bernecker, Jonathan A. Todd, Thomas Hickler, Silke Voigt, Alan Woodland, Jacek Raddatz

Publikováno v: Communications Earth & Environment, Vol 5, Iss 1, Pp 1-10 (2024)

Abstract Accurate reconstruction of seasonal atmospheric patterns of the past is essential for reliable prediction of how climate will evolve due to anthropogenic CO2 forcing. The Eocene ‘hot house’ climate, as the warmest epoch during the Cenozo

Externí odkaz: https://doaj.org/article/c6cc0724e56d4780aa089837689e3062

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Evidence for heterothermic endothermy and reptile-like eggshell mineralization in Troodon , a non-avian maniraptoran theropod

Autor: Mattia Tagliavento, Amelia J. Davies, Miguel Bernecker, Philip T. Staudigel, Robin R. Dawson, Martin Dietzel, Katja Götschl, Weifu Guo, Anne S. Schulp, François Therrien, Darla K. Zelenitsky, Axel Gerdes, Wolfgang Müller, Jens Fiebig

Publikováno v: Proceedings of the National Academy of Sciences. 120

The dinosaur–bird transition involved several anatomical, biomechanical, and physiological modifications of the theropod bauplan. Non-avian maniraptoran theropods, such as Troodon , are key to better understand changes in thermophysiology and repro

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7a0f9b242e2f9b8beb1ad7cd4fd4fecd
https://doi.org/10.1073/pnas.2213987120

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The clumped (13C18O) isotope composition of echinoid calcite: Further evidence for 'vital effects' in the clumped isotope proxy

Autor: Amelia J. Davies, Cédric M. John

Publikováno v: Geochimica et Cosmochimica Acta. 245:172-189

Carbonate clumped isotope thermometry is based on the thermodynamically dependent relative abundance of 13C 18O bonds (quantified as Δ47) within the carbonate crystal lattice. The clumping of 13C 18O in carbonates is based on a self-reaction of isot

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::456884875ed761f79fa578f38aa20404
https://doi.org/10.1016/j.gca.2018.07.038

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InterCarb: A community effort to improve inter-laboratory standardization of the carbonate clumped isotope thermometer using carbonate standards

Autor: A. Piasecki, John M. Eiler, Stefano M. Bernasconi, Ilja Kocken, Matthieu Clog, Kristin D. Bergmann, Sierra V. Petersen, Julia R. Kelson, Damien Calmels, M. Hermoso, Jamie Lucarelli, Elise M. Pelletier, Deepshikha Upadhyay, D. Liang, Landon Burgener, N. Meinicke, Ben Elliott, Thomas Jan Leutert, Inigo A. Müller, Ethan G. Hyland, Sean T. Murray, D. Blamart, Miquela Ingalls, Cédric M. John, Andrew J. Schauer, F. Dux, M. Bonifacie, Carine Chaduteau, A. Neary, Peter K. Swart, B. H. Passey, Ian Z. Winkelstern, Anne C. Fetrow, Xavier Mangenot, A. B. Jost, Eugeni Barkan, Aradhna Tripati, N. Packard, Madalina Jaggi, Martin Ziegler, Kathryn E. Snell, Emily J. Beverly, S. L. Goldberg, Naohiro Yoshida, Hagit P. Affek, Naizhong Zhang, D. Yarian, K. W. Huntington, David Bajnai, Jens Fiebig, Tobias Kluge, Amzad H. Laskar, Tyler J. Mackey, Mathieu Daëron, Brett Davidheiser-Kroll, Noah Anderson, S. E. Modestou, Anna Nele Meckler, Torsten Vennemann, Amelia J. Davies, S. A. Katz

Publikováno v: Geochemistry, Geophysics, Geosystems
Geochemistry, Geophysics, Geosystems, 2021, 22 (5), pp.e2020GC009588. ⟨10.1029/2020GC009588⟩
Geochemistry, geophysics, geosystems : G(3), vol 22, iss 5
Geochemistry, Geophysics, Geosystems, vol. 22, no. 5
e2020GC009588
Geochemistry Geophysics Geosystems
Geochemistry, Geophysics, Geosystems, AGU and the Geochemical Society, 2021, 22 (5), ⟨10.1029/2020GC009588⟩
Geochemistry, Geophysics, Geosystems, 22(5). American Geophysical Union
Geochemistry, Geophysics, Geosystems, 22 (5)
Geochemistry, geophysics, geosystems, 22 (5), Art.Nr.e2020GC009588
Geochemistry, Geophysics, Geosystems : G(3)

Increased use and improved methodology of carbonate clumped isotope thermometry has greatly enhanced our ability to interrogate a suite of Earth‐system processes. However, interlaboratory discrepancies in quantifying carbonate clumped isotope (Δ47

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1ddc9fbe8f4377f171029d88af518dee
https://hal.science/hal-03094122/file/Bernasconi_InterCarb_preprint.pdf

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Effects of oxygen plasma ashing treatment on carbonate clumped isotopes

Autor: Qi Adlan, Amelia J. Davies, Cédric M. John

RATIONALE For clumped isotope analysis (Δ47 ), hydrocarbon and organic molecules present an important contaminant that cannot always be removed by CO2 purification through a Porapak-Q trap. Low-temperature oxygen plasma ashing (OPA) is a quick and e

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::52027e4dbbff3c254fd55c3e365497ae
http://hdl.handle.net/10044/1/94285

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Evidence of taxonomic non-equilibrium effects in the clumped isotope composition of modern cephalopod carbonate

Autor: Simon Davis, Amelia J. Davies, Cédric M. John

Publikováno v: Chemical Geology. 578:120317

The stable oxygen isotope composition (δ18O) of ammonites and belemnites is a common proxy for Jurassic and Cretaceous sea temperatures. The challenges and uncertainties associated with cephalopod δ18O and other proxy based paleotemperature reconst

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::63643e690e6265c2c72b3680359c6fce
https://doi.org/10.1016/j.chemgeo.2021.120317

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Clumped-isotope palaeothermometry and LA-ICP-MS U–Pb dating of lava-pile hydrothermal calcite veins

Autor: John MacDonald, Amelia J. Davies, Nick M.W. Roberts, M. Newton, John Faithfull, Cédric M. John, C. M. Holdsworth, S. Williamson, Adrian J. Boyce

Calcite veins are a common product of hydrothermal fluid circulation. Clumped-isotope palaeothermometry is a promising technique for fingerprinting the temperature of hydrothermal fluids, but clumped-isotope systematics can be reset at temperatures o

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f691191e758dc4cc959ac71d54bd3de1

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Reducing contamination parameters for clumped isotope analysis: The effect of lowering Porapak (TM) Q trap temperature to below-50 degrees C

Autor: Cédric M. John, Amelia J. Davies

RATIONALE Carbonate clumped isotope thermometry examines the thermodynamic preference of 13 C-18 O bonds to form within the carbonate crystal lattice. The 13 C18 O16 O isotopologue in analyte CO2 has a natural abundance of 44.4 ppm necessitating stri

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7cd1798420b2450c69977c26041770c6
http://hdl.handle.net/10044/1/51579

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