Zobrazeno 1 - 10
of 191
pro vyhledávání: '"E. Bruce Watson"'
Publikováno v:
Life, Vol 13, Iss 9, p 1899 (2023)
The origin of life on earth requires the synthesis of protobiopolymers in realistic geologic environments along strictly abiotic pathways that rely on inorganic phases (such as minerals) instead of cellular machinery to promote condensation. One such
Externí odkaz:
https://doaj.org/article/0f5795cd1c2d4a02a181df2ac4f76220
Autor:
Christopher M. Hoff, E. Bruce Watson
Publikováno v:
Physics and Chemistry of Minerals. 48
The solubility of aluminum in rutile has been studied in the systems Al2O3–TiO2–H2O and Al2O3–SiO2–TiO2–H2O at 700–1200 °C and 0.075–3.3 GPa. Electron probe microanalysis (EPMA) measurements of rutile crystals grown in equilibrium with
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1ec0f31258cef4f545ff7a0db185c956
https://doi.org/10.1007/s00269-021-01169-z
https://doi.org/10.1007/s00269-021-01169-z
Autor:
Daniele J. Cherniak, E. Bruce Watson
Publikováno v:
American Mineralogist. 104:1638-1649
Diffusion of Al and Si has been measured in synthetic and natural rutile under anhydrous conditions. Experiments used Al2O3 or Al2O3-TiO2 powder mixtures for Al diffusant sources, and SiO2-TiO2 powder mixtures or quartz-rutile diffusion couples for S
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e7d608dac20685ae11cf526a27868bdd
https://doi.org/10.2138/am-2019-7030
https://doi.org/10.2138/am-2019-7030
Publikováno v:
Chemical Geology. 510:10-17
The diffusivity of isotopes of a given element in magmas can be significantly different, leading to observable effects on isotope ratios. Similarly, the Soret effect, or thermal diffusion, can also lead to considerable isotopic fractionations. Seekin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f19d29098c1a448d13d31fc49e10adc1
https://doi.org/10.1016/j.chemgeo.2019.02.008
https://doi.org/10.1016/j.chemgeo.2019.02.008
Autor:
Ruslan A. Mendybaev, Frank M. Richter, L. Saper, Steven B. Simon, Johan Villeneuve, Andrew M. Davis, Marc Chaussidon, E. Bruce Watson
Elemental abundance and isotopic fractionation profiles across zoned minerals from a martian meteorite (Shergotty) and from a lunar olivine-normative mare basalt (Apollo 15555) were used to place constraints on the thermal evolution of their host roc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::aefcd255240103699f13baa7024deea3
https://resolver.caltech.edu/CaltechAUTHORS:20210225-150425007
https://resolver.caltech.edu/CaltechAUTHORS:20210225-150425007
Autor:
Claire I.O. Nichols, Benjamin P. Weiss, Athena Eyster, Adam C. Maloof, Timothy Greenfield, Nigel M. Kelly, Mike Zawaski, Stephen J. Mojzsis, E. Bruce Watson, Daniel J. Cherniak
Publikováno v:
Goldschmidt Abstracts.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b2a5625f29c954b43ec0a2c04a024d33
https://doi.org/10.46427/gold2020.1926
https://doi.org/10.46427/gold2020.1926
Autor:
Megan Holycross, E. Bruce Watson
Publikováno v:
Geochimica et Cosmochimica Acta. 232:14-29
Piston-cylinder experiments were run to determine the chemical diffusivities of 21 trace elements (Sc, V, Y, Zr, Nb, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Yb, Lu, Hf, Th and U) in hydrous rhyolitic melts at 1 GPa pressure and temperatures from
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3cca985b7c5651497f47e7ed5b753fa9
https://doi.org/10.1016/j.gca.2018.04.006
https://doi.org/10.1016/j.gca.2018.04.006
Autor:
Sujoy Mukhopadhyay, Shipeng Shu, Michael J. Krawczynski, Dane Morgan, James A. Van Orman, Henry Wu, E. Bruce Watson, Zhewen Song, Daniele J. Cherniak
Publikováno v:
Physics and Chemistry of Minerals. 45:641-654
The distribution of He isotopes is used to trace heterogeneities in the Earth’s mantle, and is particularly useful for constraining the length scale of heterogeneity due to the generally rapid diffusivity of helium. However, such an analysis is cha
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9fb9129a00c58c7b79bf136255fae99d
https://doi.org/10.1007/s00269-018-0949-y
https://doi.org/10.1007/s00269-018-0949-y
Publikováno v:
American Journal of Science. 318:iii-viii
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dd53b16ddb7ccf634a9c958b9ee3884d
https://doi.org/10.2475/01.2018.01
https://doi.org/10.2475/01.2018.01
Publikováno v:
Earth and Planetary Science Letters. 480:15-24
Previous experimental studies have revealed that the difference in diffusivity of two isotopes can be significant in some media and can lead to an observable fractionation effect in silicate melts based on isotope mass. Here, we report the first char
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e402f55cc81dcb4b7456d47afb1353d9
https://doi.org/10.1016/j.epsl.2017.09.042
https://doi.org/10.1016/j.epsl.2017.09.042