Search Results - "Bogard, D."

Ages and Geologic Histories of Martian Meteorites by Nyquist, Le, Bogard, Dd, Shih, C-y, Greshake, A, Stöffler, D, Eugster, O

“…We review the radiometric ages of the 16 currently known Martian meteorites, classified as 11 shergottites (8 basaltic and 3 lherzolitic), 3 nakhlites…”
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The variety of lithologies in the Yamato-86032 lunar meteorite: Implications for formation processes of the lunar crust by Yamaguchi, A., Karouji, Y., Takeda, H., Nyquist, L., Bogard, D., Ebihara, M., Shih, C.-Y., Reese, Y., Garrison, D., Park, J., McKay, G.

“…We performed a petrologic, mineralogical, geochemical, and isotopic study of several lithologies in the Y-86032 feldspathic breccia. This study leads us to…”
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Isotopic evidence for a Martian regolith component in shergottite meteorites by Rao, M. N., Nyquist, L. E., Bogard, D. D., Garrison, D. H., Sutton, S. R., Michel, R., Reedy, R. C., Leya, I.

“…The 80Kr excesses determined in the gas‐rich impact‐melt (GRIM) glasses in EET79001 and Shergotty correlate poorly with the 129XeM (Martian atmosphere)…”
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Magnesian anorthosites and a deep crustal rock from the farside crust of the moon by Takeda, Hiroshi, Yamaguchi, A., Bogard, D.D., Karouji, Y., Ebihara, M., Ohtake, M., Saiki, K., Arai, T.

“…Among over thirty lunar meteorites recovered from the hot deserts and Antarctica, Dhofar 489 is the most depleted in thorium (0.05 ppm), FeO, and rare earth…”
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Concordant Rb–Sr, Sm–Nd, and Ar–Ar ages for Northwest Africa 1460: A 346 Ma old basaltic shergottite related to “lherzolitic” shergottites by Nyquist, L.E., Bogard, D.D., Shih, C.-Y., Park, J., Reese, Y.D., Irving, A.J.

“…Multiple lines of evidence show that the Rb–Sr, Sm–Nd, and Ar–Ar isotopic systems individually give robust crystallization ages for basaltic (or diabasic)…”
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Feldspathic clasts in Yamato-86032: Remnants of the lunar crust with implications for its formation and impact history by Nyquist, L., Bogard, D., Yamaguchi, A., Shih, C.-Y., Karouji, Y., Ebihara, M., Reese, Y., Garrison, D., McKay, G., Takeda, H.

“…Low concentrations of Th and Fe in the Yamato (Y)-86032 bulk meteorite support earlier suggestions that Y-86032 comes from a region of the moon far distant…”
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Dhofar 378 Martian shergottite: Evidence of early shock melting by Park, Jisun, Bogard, Donald D., Mikouchi, Takashi, McKay, Gordon A.

“…Shock heating of the Dhofar 378 (Dho 378) Martian shergottite produced melting, vesiculation, and flow of the plagioclase, which upon cooling recrystallized…”
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K–Ar ages of meteorites: Clues to parent-body thermal histories by Bogard, Donald D.

“…Whereas most radiometric chronometers give formation ages of individual meteorites >4.5 Ga ago, the K–Ar chronometer rarely gives times of meteorite formation…”
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Incidence and characteristics of failures in obstetric neuraxial analgesia and anesthesia: a retrospective analysis of 19,259 deliveries by Pan, P.H., Bogard, T.D., Owen, M.D.

“…A retrospective analysis was performed on 19,259 deliveries that occurred in our institution from January 2000 to December 2002. Anesthesia records and quality…”
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Chronology, geochemistry, and petrology of a ferroan noritic anorthosite clast from Descartes breccia 67215: Clues to the age, origin, structure, and impact history of the lunar crust by Norman, Marc D., Borg, Lars E., Nyquist, Lawrence E., Bogard, Donald D.

“…— The petrology, major and trace element geochemistry, and Nd‐Ar‐Sr isotopic compositions of a ferroan noritic anorthosite clast from lunar breccia 67215 have…”
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Rb–Sr, Sm–Nd and Ar–Ar isotopic systematics of Martian dunite Chassigny by Misawa, K., Shih, C.-Y., Reese, Y., Bogard, D.D., Nyquist, L.E.

“…Isotopic analysis of the Martian meteorite Chassigny yields a Rb–Sr age of 1406 ± 14 Ma with an initial 87Sr/ 86Sr ratio of 0.702251 ± 0.000034, a Sm–Nd age of…”
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Graves Nunataks 95209: A snapshot of metal segregation and core formation by McCoy, T.J., Carlson, W.D., Nittler, L.R., Stroud, R.M., Bogard, D.D., Garrison, D.H.

“…GRA 95209 may provide our best opportunity to date to understand the earliest stages of core formation in asteroidal bodies. This lodranite preserves a…”
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Martian Volatiles: Isotopic Composition, Origin, and Evolution by Bogard, D D, Clayton, R N, Marti, K, Owen, T, Turner, G

“…Information about the composition of volatiles in the Martian atmosphere and interior derives from Viking spacecraft and ground-based measurements, and…”
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The SNC meteorites are from Mars by Treiman, Allan H., Gleason, James D., Bogard, Donald D.

“…The 14 SNC meteorites are all igneous rocks, either basalts or basaltic cumulates. They are inferred to be from Mars, based on direct comparison with Martian…”
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Cosmic-ray exposure history of the Norton County enstatite achondrite by HERZOG, G. F., ALBRECHT, Achim, MA, Peixue, FINK, David, KLEIN, Jeffrey, MIDDLETON, Roy, BOGARD, Donald D., NYQUIST, L. E., SHIH, C.-Y., GARRISON, D. H., REESE, Young, MASARIK, J., REEDY, R. C., RUGEL, G., FAESTERMANN, T., KORSCHINEK, G.

“…– 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…”
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39Ar-40Ar dating of the Zagami Martian shergottite and implications for magma origin of excess 40Ar by BOGARD, Donald D., PARK, Jisun

“…— The Zagami shergottite experienced a complex, petrogenetic formation history (McCoy et al. 1992, 1999). Like several shergottites, Zagami contains excess…”
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Brachinites: Igneous rocks from a differentiated asteroid by Mittlefehldt, David W., Bogard, Donald D., Berkley, John L., Garrison, Daniel H.

“…— We have done petrologic studies of brachinites Allan Hills (ALH) 84025, Elephant Moraine (EET) 99402, and EET 99407; bulk geochemical studies of EET 99402…”
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DNA Double-strand Break Signaling Is a Therapeutic Target in Head and Neck Cancer by Wu, Jianchun, Galvan, Kate Jillian, Bogard, Ryan D, Peterson, Caryn E, Shergill, Ardaman, Crowe, David L

“…Head and neck cancer (HNC) is common worldwide. Given poor outcomes for patients with HNC, research into targeted therapies is needed. Ataxia telangiectasia…”
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A petrologic and isotopic study of winonaites: evidence for early partial melting, brecciation, and metamorphism by Benedix, G.K., McCoy, T.J., Keil, K., Bogard, D.D., Garrison, D.H.

“…We have conducted detailed petrologic, chemical, and isotopic studies of winonaites to ascertain the genesis of this group of meteorites. Winonaites have…”
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A petrologic and isotopic study of lodranites: Evidence for early formation as partial melt residues from heterogeneous precursors by McCoy, T.J., Keil, K., Clayton, R.N., Mayeda, T.K., Bogard, D.D., Garrison, D.H., Wieler, R.

“…We have conducted petrologic, chemical, and isotopic studies of lodranites in an attempt to constrain their genesis. Lodran, Gibson, Y-791491, Y-791493,…”
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