Zobrazeno 1 - 10 of 76 pro vyhledávání: '"L. E. Nyquist"'
1
Shock experiments on basalt—Ferric sulfate mixes and their possible relevance to the sulfide bleb clusters in large impact melts in shergottites
Autor: M. N. Rao, L. E. Nyquist, P. D. Asimow, D. K. Ross, S. R. Sutton, T. H. See, C. Y. Shih, D. H. Garrison, S. J. Wentworth, J. Park, Natalia Artemieva
Large impact-melt pockets in shergottites contain both Martian regolith components and sulfide/sulfite bleb clusters that yield high sulfur concentrations locally compared to bulk shergottites. The regolith may be the source of excess sulfur in the s
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1f838d7438fd0dee9a923724cf6d2ff8
https://resolver.caltech.edu/CaltechAUTHORS:20211209-456542000
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2
40 Ar/ 39 Ar ages of Northwest Africa 7034 and Northwest Africa 7533
Autor: Carl C. Swisher, Jacob Setera, Munir Humayun, J. Park, L. E. Nyquist, Brigitte Zanda, Jeremy S. Delaney, Christa Göpel, Keisuke Nagao, Brent D. Turrin, C.-Y. Shih, Gregory F. Herzog, Roger H. Hewins, F. N. Lindsay
Publikováno v: Meteoritics and Planetary Science
Meteoritics and Planetary Science, 2021, 56 (3), pp.515-545. ⟨10.1111/maps.13637⟩
Meteoritics and Planetary Science, Wiley, 2021, 56 (3), pp.515-545. ⟨10.1111/maps.13637⟩
International audience; The Martian breccias NWA 7034, NWA 7533, and paired meteorites record events ranging in age from 4.47 Ga to 1 wt% K and thought to be rich in feldspar and one containing
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6535374b211e95ed10ab634586a3ea6a
https://hal.science/hal-03470392
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4
Extreme early solar system chemical fractionation recorded by alkali-rich clasts contained in ordinary chondrite breccias
Autor: M. J. Tappa, L. E. Nyquist, Osamu Okano, Tatsunori Yokoyama, Shigekazu Yoneda, K. Misawa, Justin I. Simon, Chi Yu Shih
Publikováno v: Earth and Planetary Science Letters. 458:233-240
New K–Ca and Rb–Sr isotopic analyses have been performed on alkali-rich igneous rock fragments in the Yamato (Y)-74442 and Bhola LL-chondritic breccias to better understand the extent and timing of alkali enrichments in the early solar system. Th
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::30efdd4c7f2ead3881d6ba8ccf205f46
https://doi.org/10.1016/j.epsl.2016.10.037
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5
Rb‐Sr and Sm‐Nd isotopic and REE studies of igneous components in the bulk matrix domain of Martian breccia Northwest Africa 7034
Autor: Paul V. Burger, Francis M. McCubbin, C.-Y. Shih, Carl B. Agee, L. E. Nyquist, Charles K. Shearer, A. R. Santos, Zhan X. Peng
Publikováno v: Meteoritics & Planetary Science. 51:483-498
The bulk matrix domain of the Martian breccia NWA 7034 was examined petrographically and isotopically to better understand the provenance and age of the source material that make up the breccia. Both 147Sm-143Nd and 146Sm-142Nd age results for minera
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5b9ab5199896e356e503e9f95ca552cc
https://doi.org/10.1111/maps.12606
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6
Crystal accumulation in a 4.2 Ga lunar impact melt
Autor: C.-Y. Shih, Marc D. Norman, L. E. Nyquist, Lawrence A. Taylor
Publikováno v: Geochimica et Cosmochimica Acta. 172:410-429
The ages of lunar impact basins and the role of fractional crystallization in producing compositional heterogeneity of lunar melt sheets are long-standing problems with significant implications for solar system dynamics and the petrologic evolution o
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d292ebc47db82217cdce4de5818f97d5
https://doi.org/10.1016/j.gca.2015.09.021
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9
Rb–Sr isotopic systematics of alkali-rich fragments in the Yamato-74442 LL-chondritic breccia
Autor: M. J. Tappa, Justin I. Simon, Chi Yu Shih, Tatsunori Yokoyama, K. Misawa, Shigekazu Yoneda, L. E. Nyquist, Osamu Okano
Publikováno v: Earth and Planetary Science Letters. 366:38-48
We have undertaken mineralogical, petrographical and Rb–Sr isotopic studies on alkali-rich igneous rock fragments in the Yamato (Y)-74442 LL-chondritic breccia. The fragments are a few mm in size and are composed mainly of porphyritic olivine and d
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::da4f634f508924a5a89817eb96da88e3
https://doi.org/10.1016/j.epsl.2013.01.037
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10
Cosmic-ray exposure history of the Norton County enstatite achondrite
Autor: Young Reese, Peixue Ma, Gunther Korschinek, Roy Middleton, C.-Y. Shih, L. E. Nyquist, Jacob Klein, Donald D. Bogard, Robert C. Reedy, Gregory F. Herzog, David Fink, Jozef Masarik, Georg Rugel, A. Albrecht, Daniel H. Garrison, Thomas Faestermann
Publikováno v: Meteoritics & Planetary Science. 46:284-310
– We report measurements of cosmogenic nuclides in up to 11 bulk samples from various depths in Norton County. The activities of 36Cl, 41Ca, 26Al, and 10Be were measured by accelerator mass spectrometry; the concentrations of the stable isotopes of
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::aaa984fa398c4b065d996dbadee2ff5b
https://doi.org/10.1111/j.1945-5100.2010.01154.x
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