Zobrazeno 1 - 10
of 145
pro vyhledávání: '"Alexander A. Nemchin"'
Autor:
Joshua F. Snape, Alexander A. Nemchin, Martin J. Whitehouse, Qiu-Li Li, Yu Liu, Nicholas E. Timms, Timmons Erickson, Gretchen K. Benedix
Publikováno v:
Royal Society Open Science, Vol 11, Iss 5 (2024)
The Apollo 14 and 16 missions returned several samples commonly interpreted as crystalline impact melt, with ages of approximately 3800–3850 Ma. Previous work has suggested that these rocks formed in one or more pre-Imbrium basin forming impact(s).
Externí odkaz:
https://doaj.org/article/eaec2417fa754104828819e8add9e695
Autor:
Leonid Shumlyanskyy, Stepan Tsymbal, Monika A. Kusiak, Simon A. Wilde, Alexander A. Nemchin, Iryna Tarasko, Liudmyla Shumlianska, Mandy Hofmann
Publikováno v:
Geosciences, Vol 11, Iss 12, p 487 (2021)
The results of a laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) U–Pb dating and a Hf isotope study of zircon crystals separated from small eclogite xenoliths found in Devonian kimberlites within the Prypyat horst, Ukraine,
Externí odkaz:
https://doaj.org/article/3b25c7a5e3d343f79cfa2c95b3bd38fc
Autor:
Joshua F. Snape, Alexander A. Nemchin, Tim Johnson, Stefanie Luginbühl, Jasper Berndt, Stephan Klemme, Laura J. Morrissey, Wim van Westrenen
Publikováno v:
Geochimica et Cosmochimica Acta, 326, 119-148. Elsevier Limited
Snape, J F, Nemchin, A A, Johnson, T, Luginbühl, S, Berndt, J, Klemme, S, Morrissey, L J & van Westrenen, W 2022, ' Experimental constraints on the long-lived radiogenic isotope evolution of the Moon ', Geochimica et Cosmochimica Acta, vol. 326, pp. 119-148 . https://doi.org/10.1016/j.gca.2022.04.008
Snape, J, Nemchin, A A, Johnson, T, Luginbühl, S, Berndt, J, Klemme, S, Morrissey, L & van Westrenen, W 2022, ' Experimental constraints on the long-lived radiogenic isotope evolution of the Moon ', Geochimica et Cosmochimica Acta, pp. 119 . https://doi.org/10.1016/j.gca.2022.04.008
Snape, J F, Nemchin, A A, Johnson, T, Luginbühl, S, Berndt, J, Klemme, S, Morrissey, L J & van Westrenen, W 2022, ' Experimental constraints on the long-lived radiogenic isotope evolution of the Moon ', Geochimica et Cosmochimica Acta, vol. 326, pp. 119-148 . https://doi.org/10.1016/j.gca.2022.04.008
Snape, J, Nemchin, A A, Johnson, T, Luginbühl, S, Berndt, J, Klemme, S, Morrissey, L & van Westrenen, W 2022, ' Experimental constraints on the long-lived radiogenic isotope evolution of the Moon ', Geochimica et Cosmochimica Acta, pp. 119 . https://doi.org/10.1016/j.gca.2022.04.008
This study presents the results of high pressure and temperature experiments to investigate the mineral–melt trace element partitioning behaviour for minerals predicted to have formed during the crystallisation of the Lunar Magma Ocean (LMO). The f
Autor:
Chipui Tang, Shaolin Li, Dunyi Liu, Alexander A. Nemchin, Yexing Luo, Sky Beard, Xiaochao Che, 徐伟彪 (Weibiao Hsu), Tao Long
Publikováno v:
Geochimica et Cosmochimica Acta. 309:79-95
Silicate-bearing iron meteorites record metal–silicate separation and mixing processes of planetesimals. Of particular interest is the IIE group as its silicate inclusions show great petrological diversity, probably resulting from the complex petro
Autor:
Robert T. Pidgeon, Alexander A. Nemchin, Malcolm P. Roberts, Paul Guagliardo, Denis Fougerouse
Publikováno v:
Chemical Geology. 621:121357
Autor:
Maria T. Zuber, Katarina Miljković, Alexander A. Nemchin, M. Laneuville, Phil A. Bland, Mark A. Wieczorek
Publikováno v:
Nature Communications, Vol 12, Iss 1, Pp 1-6 (2021)
Nature Communications
Nature Communications, Nature Publishing Group, 2021, 12 (1), ⟨10.1038/s41467-021-25818-7⟩
Nature Communications
Nature Communications, Nature Publishing Group, 2021, 12 (1), ⟨10.1038/s41467-021-25818-7⟩
The lunar cratering record is used to constrain the bombardment history of both the Earth and the Moon. However, it is suggested from different perspectives, including impact crater dating, asteroid dynamics, lunar samples, impact basin-forming simul
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2847bf89aa753a67d24d6a4d4d80f1fe
https://doi.org/10.5194/egusphere-egu22-2214
https://doi.org/10.5194/egusphere-egu22-2214
Autor:
Joshua F. Snape, D.M. Martin, John F. Pernet-Fisher, David A. Kring, Alexander A. Nemchin, Romain Tartèse, Martin J. Whitehouse, Vladimir Vishnyakov, Katherine H. Joy
Publikováno v:
Royal Society Open Science, Vol 7, Iss 6 (2020)
Royal Society Open Science, 7(6), 1-21. Royal Society, The
Royal Society Open Science
Joy, K H, Snape, J F, Nemchin, A A, Tartèse, R, Martin, D M, Whitehouse, M J, Vishnyakov, V, Pernet-Fisher, J F & Kring, D A 2020, ' Timing of geological events in the lunar highlands recorded in shocked zircon-bearing clasts from Apollo 16 ', Royal Society Open Science, vol. 7, no. 6, 200236, pp. 1-21 . https://doi.org/10.1098/rsos.200236
Royal Society Open Science, 7(6), 1-21. Royal Society, The
Royal Society Open Science
Joy, K H, Snape, J F, Nemchin, A A, Tartèse, R, Martin, D M, Whitehouse, M J, Vishnyakov, V, Pernet-Fisher, J F & Kring, D A 2020, ' Timing of geological events in the lunar highlands recorded in shocked zircon-bearing clasts from Apollo 16 ', Royal Society Open Science, vol. 7, no. 6, 200236, pp. 1-21 . https://doi.org/10.1098/rsos.200236
Apollo 16 soil-like regolith breccia 65745,7 contains two zircon-bearing clasts. One of these clasts is a thermally annealed silica-rich rock, which mineralogically has affinities with the High Alkali Suite (Clast 1), and yields zircon dates ranging
Tracing martian surface interactions with the triple O isotope compositions of meteoritic phosphates
Autor:
Joshua F. Snape, Renaud E. Merle, Gavin G. Kenny, Philip A. Bland, Jeremy J. Bellucci, Gretchen Benedix, Alexander A. Nemchin, Martin J. Whitehouse
Publikováno v:
Earth and Planetary Science Letters, 531:115977, 1-8. Elsevier
Bellucci, J J, Whitehouse, M J, Nemchin, A A, Snape, J F, Kenny, G G, Merle, R E, Bland, P A & Benedix, G K 2020, ' Tracing martian surface interactions with the triple O isotope compositions of meteoritic phosphates ', Earth and Planetary Science Letters, vol. 531, 115977, pp. 1-8 . https://doi.org/10.1016/j.epsl.2019.115977
Bellucci, J J, Whitehouse, M J, Nemchin, A A, Snape, J F, Kenny, G G, Merle, R E, Bland, P A & Benedix, G K 2020, ' Tracing martian surface interactions with the triple O isotope compositions of meteoritic phosphates ', Earth and Planetary Science Letters, vol. 531, 115977, pp. 1-8 . https://doi.org/10.1016/j.epsl.2019.115977
The triple oxygen isotope compositions of phosphate grains in six martian meteorites have been measured by Secondary Ion Mass Spectrometry (SIMS) and combined together with their chlorine isotope and halogen concentrations have been used to constrain
Autor:
Zhengbin Deng, Laura C. Bouvier, Jussi Petteri Suuronen, Tim E. Johnson, Arnaud Agranier, Martin Bizzarro, Laure Martin, Frédéric Moynier, M. M. Costa, Alexander A. Nemchin, Takashi Mikouchi, James N. Connelly, Ninna K. Jensen, Matthew S.A. Horstwood
Publikováno v:
'Proceedings of the National Academy of Sciences of the USA ', vol: 117, pages: 30973-30979 (2020)
Proceedings of the National Academy of Sciences
Proceedings of the National Academy of Sciences of the United States of America
Costa, M M, Jensen, N K, Bouvier, L C, Connelly, J N, Mikouchi, T, Horstwood, M S A, Suuronen, J-P, Moynier, F, Deng, Z, Agranier, A, Martin, L A J, Johnson, T E, Nemchin, A A & Bizzarro, M 2020, ' The internal structure and geodynamics of Mars inferred from a 4.2-Gyr zircon record ', Proceedings of the National Academy of Sciences of the United States of America, vol. 117, no. 49, pp. 30973-30979 . https://doi.org/10.1073/pnas.2016326117
Proceedings of the National Academy of Sciences of the United States of America, 2020, 117 (49), pp.30973-30979. ⟨10.1073/pnas.2016326117⟩
Proceedings Of The National Academy Of Sciences Of The United States Of America (0027-8424) (Natl Acad Sciences), 2020-12, Vol. 117, N. 49, P. 30973-30979
Proceedings of the National Academy of Sciences
Proceedings of the National Academy of Sciences of the United States of America
Costa, M M, Jensen, N K, Bouvier, L C, Connelly, J N, Mikouchi, T, Horstwood, M S A, Suuronen, J-P, Moynier, F, Deng, Z, Agranier, A, Martin, L A J, Johnson, T E, Nemchin, A A & Bizzarro, M 2020, ' The internal structure and geodynamics of Mars inferred from a 4.2-Gyr zircon record ', Proceedings of the National Academy of Sciences of the United States of America, vol. 117, no. 49, pp. 30973-30979 . https://doi.org/10.1073/pnas.2016326117
Proceedings of the National Academy of Sciences of the United States of America, 2020, 117 (49), pp.30973-30979. ⟨10.1073/pnas.2016326117⟩
Proceedings Of The National Academy Of Sciences Of The United States Of America (0027-8424) (Natl Acad Sciences), 2020-12, Vol. 117, N. 49, P. 30973-30979
Significance We discovered a zircon record in a Martian meteorite that spans 4.2 Gyr, nearly the entire geologic history of Mars. Ancient zircons define a bimodal distribution with groupings at 4474 ± 10 Ma and 4442 ± 17 Ma, reflecting intense bomb
Autor:
Alexander A. Nemchin, Martin J. Whitehouse, Thomas N. Hopkinson, Mahesh Anand, Joshua F. Snape, Renaud E. Merle
Publikováno v:
Snape, J F, Nemchin, A A, Whitehouse, M J, Merle, R E, Hopkinson, T & Anand, M 2019, ' The timing of basaltic volcanism at the Apollo landing sites ', Geochimica Et Cosmochimica Acta, vol. 266, pp. 29-53 . https://doi.org/10.1016/j.gca.2019.07.042
Geochimica et Cosmochimica Acta, 266, 29-53. Elsevier Limited
Geochimica et Cosmochimica Acta
Snape, J F, Nemchin, A A, Whitehouse, M J, Merle, R E, Hopkinson, T & Anand, M 2019, ' The timing of basaltic volcanism at the Apollo landing sites ', Geochimica et Cosmochimica Acta, vol. 266, pp. 29-53 . https://doi.org/10.1016/j.gca.2019.07.042
Geochimica et Cosmochimica Acta, 266, 29-53. Elsevier Limited
Geochimica et Cosmochimica Acta
Snape, J F, Nemchin, A A, Whitehouse, M J, Merle, R E, Hopkinson, T & Anand, M 2019, ' The timing of basaltic volcanism at the Apollo landing sites ', Geochimica et Cosmochimica Acta, vol. 266, pp. 29-53 . https://doi.org/10.1016/j.gca.2019.07.042
Precise crystallisation ages have been determined for a range of Apollo basalts from Pb-Pb isochrons generated using Secondary Ion Mass Spectrometry (SIMS) analyses of multiple accessory phases including K-feldspar, K-rich glass and phosphates. The s