Zobrazeno 1 - 10
of 12
pro vyhledávání: '"Gregory J. Archer"'
Autor:
Gregory J. Archer, Gerrit Budde, Emily A. Worsham, Andreas Stracke, Matthew G. Jackson, Thorsten Kleine
Publikováno v:
Geochemistry, Geophysics, Geosystems, Vol 24, Iss 2, Pp n/a-n/a (2023)
Abstract Ocean island basalts (OIB) show variable 182W deficits that have been attributed to either early differentiation of the mantle or core‐mantle interaction. However, 182W variations may also reflect nucleosynthetic isotope heterogeneity inhe
Externí odkaz:
https://doaj.org/article/8078c631c7a545e099b9f7434a75d3b8
Publikováno v:
Journal of Analytical Atomic Spectrometry. 37:2005-2021
We provide critical new insights into the nature and origin of a widespread isotope effect for W: it is inconsistent with a nuclear field shift, induced during the chemical separation procedure, and also controlled by the amount of W processed.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::15243a744f62c022f56907d9510380ec
https://doi.org/10.1039/d2ja00102k
https://doi.org/10.1039/d2ja00102k
Autor:
Gregory J. Archer, Gerrit Budde, Emily A. Worsham, Andreas Stracke, Matthew G. Jackson, Thorsten Kleine
Publikováno v:
Geochemistry, Geophysics, Geosystems. 24
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a9f2122646cff090261c32594dff8fda
https://doi.org/10.1029/2022gc010688
https://doi.org/10.1029/2022gc010688
Autor:
Alessandro Morbidelli, Qing-Zhu Yin, Harry Becker, Natalia Artemieva, Wladimir Neumann, Kai Wünnemann, Gregory J. Archer, Meng-Hua Zhu, David C. Rubie, James M.D. Day
Publikováno v:
Nature Astronomy. 5:1286-1296
Abundances of the highly siderophile elements (HSEs) in silicate portions of Earth and the Moon provide constraints on the impact flux to both bodies, but only since ~100 Myr after the beginning of the Solar System (hereafter tCAI). The earlier impac
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ffbe3b1085f3a0aee79b9e2b6eb5405e
https://doi.org/10.1038/s41550-021-01475-0
https://doi.org/10.1038/s41550-021-01475-0
Autor:
Qing-Zhu Yin, Kazuhito Ozawa, Ryoji Tanaka, Richard J. Walker, Tsuyoshi Iizuka, Akira Yamaguchi, Yuki Hibiya, Tomoki Nakamura, Gregory J. Archer, Matthew E. Sanborn, Anthony J. Irving, Yuya Sato
Publikováno v:
Geochimica et Cosmochimica Acta. 245:597-627
Northwest Africa (NWA) 6704 is a unique achondrite characterized by a near-chondritic major element composition with a remarkably intact igneous texture. To investigate the origin of this unique achondrite, we have conducted a combined petrologic, ch
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::335dea4e82c7a0788463630fedea63f4
https://doi.org/10.1016/j.gca.2018.04.031
https://doi.org/10.1016/j.gca.2018.04.031
Autor:
Richard J. Walker, J. L. Hellmann, Thomas S. Kruijer, Terrence Blackburn, Gregory J. Archer, Jonathan Tino
Publikováno v:
Geochimica et Cosmochimica Acta. 245:556-576
The abundances of highly siderophile elements (HSE: Re, Os, Ir, Ru, Pt, Pd), as well as (187)Re-(187)Os and (182)Hf-(182)W isotopic systematics were determined for separated metal, slightly magnetic, and nonmagnetic fractions from seven H4 to H6 ordi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dc80c777d30c73ab9a1f1d492b773a4a
https://doi.org/10.1016/j.gca.2018.11.012
https://doi.org/10.1016/j.gca.2018.11.012
Publikováno v:
Nature Geoscience. 14:714-715
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d46db035e7945cf98d4642a69501b401
https://doi.org/10.1038/s41561-021-00820-2
https://doi.org/10.1038/s41561-021-00820-2
Publikováno v:
Goldschmidt2021 abstracts.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e3eedc516928200cf993822cd89c1e7d
https://doi.org/10.7185/gold2021.8063
https://doi.org/10.7185/gold2021.8063
Publikováno v:
Geochim Cosmochim Acta
The abundances of highly siderophile elements (HSE; including Re, Os, Ir, Ru, Pt, and Pd) and (187)Re-(187)Os isotopic systematics were determined for two fragments from ungrouped achondrite NWA 7325. Rhenium-Os systematics are consistent with closed
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::37950e886643964f96742f8249c99774
https://europepmc.org/articles/PMC8312601/
https://europepmc.org/articles/PMC8312601/
Publikováno v:
International journal of mass spectrometry. 414
Here we describe a new analytical technique for the high-precision measurement of 182W/184W and 183W/184W using negative thermal ionization mass spectrometry (N-TIMS). We improve on the recently reported method of Trinquier et al. (2016), which descr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bb6cabcc96d89d49275b832bbae1f5cd
https://pubmed.ncbi.nlm.nih.gov/30713466
https://pubmed.ncbi.nlm.nih.gov/30713466