Zobrazeno 1 - 10
of 522
pro vyhledávání: '"J. Krawczynski"'
Publikováno v:
Geochemistry, Geophysics, Geosystems, Vol 24, Iss 12, Pp n/a-n/a (2023)
Abstract We provide a new algorithm for mass‐balance calculations in petrology and geochemistry based on the log‐ratio approach championed initially by John Aitchison (e.g., Aitchison, 1982, https://doi.org/10.1111/j.2517-6161.1982.tb01195.x; Ait
Externí odkaz:
https://doaj.org/article/f7d0b0439baa4609a396bb1c1befebe9
Publikováno v:
American Mineralogist. 107:2084-2100
Oxygen fugacity is an important but difficult parameter to constrain for primitive arc magmas. In this study, the partitioning behavior of Fe3+/Fe2+ between amphibole and glass synthesized in piston-cylinder and cold-seal apparatus experiments is dev
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d03196684aabe46e8b86791f9d2c6649
https://doi.org/10.2138/am-2022-8031
https://doi.org/10.2138/am-2022-8031
Autor:
Amanda C. Stadermann, Bradley L. Jolliff, Michael J. Krawczynski, Christopher W. Hamilton, Jessica J. Barnes
Publikováno v:
Meteoritics & Planetary Science. 57:794-816
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::31de603c99789358a4853662e0b25611
https://doi.org/10.1111/maps.13795
https://doi.org/10.1111/maps.13795
Autor:
Nicolas Dauphas, Timo Hopp, Grant Craig, Zhe J. Zhang, Maria C. Valdes, Philipp R. Heck, Bruce L. A. Charlier, Elizabeth A. Bell, T. Mark Harrison, Andrew M. Davis, Laure Dussubieux, Patrick R. Williams, Michael J. Krawczynski, Claudia Bouman, Nicholas S. Lloyd, Darren Tollstrup, Johannes B. Schwieters
Publikováno v:
Journal of Analytical Atomic Spectrometry. 37:2420-2441
Double-Wien filter-selection-aperture and hexapole-collision-cell technologies coupled to laser ablation multicollector inductively coupled plasma mass spectrometry (LA-MC-ICP-MS/MS) enables in situ analysis of 87Sr variations produced by 87Rb decay.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::abb5044574427e5a65270ed27ca70d2d
https://doi.org/10.1039/d2ja00135g
https://doi.org/10.1039/d2ja00135g
Autor:
Penny E Wieser, Adam J R Kent, Christy B Till, John Donovan, David A Neave, Dawnika L Blatter, Michael J Krawczynski
Publikováno v:
Journal of Petrology. 64
The composition of clinopyroxene and clinopyroxene-liquid (Cpx-Liq) pairs are frequently used to calculate crystallization/equilibration pressures in igneous systems. While canonical uncertainties are often assigned to calculated pressures based on f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0cb5a55fb55d599e036733f38bbcaa01
https://doi.org/10.1093/petrology/egac126
https://doi.org/10.1093/petrology/egac126
Autor:
Zhe Zhang, Fang-Zhen Teng, Corliss Kin I Sio, Jiyong Zhao, S. M. Aarons, Jennika Greer, Michael J. Krawczynski, Frank S. Spear, Hao Zeng, Kelsey B. Prissel, Xi Chen, Nicolas Dauphas, J. Y. Hu, N. X. Nie, Anat Shahar, Wenli Bi, Da Wang, Heng-Ci Tian, M. Roskosz, Philipp R. Heck, Esen E. Alp, Michael Y. Hu
Publikováno v:
Geochimica et Cosmochimica Acta. 302:18-45
Interpreting isotopic signatures documented in natural rocks requires knowledge of equilibrium isotopic fractionation factors. Here, we determine equilibrium Fe isotope fractionation factors between several common rock-forming minerals using a compar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c33401bb1a48696ce1f0caf78abdcf01
https://doi.org/10.1016/j.gca.2021.03.014
https://doi.org/10.1016/j.gca.2021.03.014
Publikováno v:
American Mineralogist. 104:936-948
Here we present a study on the quenchability of hydrous mafic melts. We show via hydrothermal experiments that the ability to quench a mafic hydrous melt to a homogeneous glass at cooling rates relevant to natural samples has a limit of no more than
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bf24b278f472d2ea36c421110f398c51
https://doi.org/10.2138/am-2019-6735
https://doi.org/10.2138/am-2019-6735
Autor:
Hélène Couvy, Max Eisele, Justin Filiberto, Michael J. Krawczynski, Cosette Dwyer, Ryan C. Ogliore
Publikováno v:
Applied Spectroscopy. 73:767-773
We report an infrared (IR) spectroscopic technique to detect quartz grains with large isotope anomalies. We synthesized isotopically doped quartz and used Fourier transform infrared spectroscopy (FT-IR) in two different instruments: a traditional far
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1b386a2b9935422c75a4ea1038cc52ea
https://doi.org/10.1177/0003702819842558
https://doi.org/10.1177/0003702819842558
Mafic enclaves preserve a record of deep differentiation of primitive magmas in arc settings. We analyze the petrology and geochemistry of mafic enclaves from Shiveluch volcano in the Kamchatka peninsula to determine the differentiation histories of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::07ba9f99e6f7d528041aacba6dd38065
Publikováno v:
Contributions to Mineralogy and Petrology. 175
The Fe–Mg and Fe–Mn interdiffusion coefficients for ilmenite have been determined as a function of temperature and crystallographic orientation. Diffusion annealing experiments were conducted at 1.5 GPa between 800 and 1100 $$^{\circ }\hbox {C}$$
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::82fb92b02fdddab1acc51b0ca6ab06d3
https://doi.org/10.1007/s00410-020-01695-z
https://doi.org/10.1007/s00410-020-01695-z