DSpace Repository

Browsing by Author "Mittlefehldt, David W."

Browsing by Author "Mittlefehldt, David W."

Sort by: Order: Results:

  • Asteroid (4) Vesta II: Exploring a geologically and geochemically complex world with the Dawn Mission 
    McCoy, Timothy J.; Beck, Andrew W.; Prettyman, Thomas H.; Mittlefehldt, David W. (2015)
    More than 200 years after its discovery, asteroid (4) Vesta is thought to be the parent body for the howardite, eucrite and diogenite (HED) meteorites. The Dawn spacecraft spent ~14 months in orbit around this largest, ...
  • Composition of the Rheasilvia basin, a window into Vesta's interior 
    McSween, Harry Y.; Ammannito, Eleonora; Reddy, Vishnu; Prettyman, Thomas H.; Beck, Andrew W.; De Sanctis, M. Cristina; Nathues, Andreas; Le Corre, Lucille; O'Brien, David P.; Yamashita, Naoyuki; McCoy, Timothy J.; Mittlefehldt, David W.; Toplis, Michael J.; Schenk, Paul; Palomba, Ernesto; Turrini, Diego; Tosi, Federico; Zambon, Francesca; Longobardo, Andrea; Capaccioni, Fabrizio; Raymond, Carol A.; Russell, Christopher T. (2013)
    The estimated excavation depth of the huge Rheasilvia impact basin is nearly twice the likely thickness of the Vestan basaltic crust, so the mantle should be exposed. Spectral mapping by the Dawn spacecraft reveals ...
  • Compositional constraints on the genesis of diogenites, Compositional constraints on the genesis of diogenites 
    Mittlefehldt, David W.; Beck, Andrew W.; Lee, Cin-Ty A.; McSween, Harry Y.; Buchanan, Paul C. (2012)
    Abstract- We have done bulk rock compositional analyses (INAA, ICP-MS) and petrologic study of a suite of diogenite meteorites. Most contain orthopyroxenes with mg#s of 70.6-79.0. Meteorite Hills (MET) 00425 is magnesian ...
  • Diverse Lithologies and Alteration Events on the Rim of Noachian-Aged Endeavour Crater, Meridiani Planum, Mars: In Situ Compositional Evidence 
    Mittlefehldt, David W.; Gellert, Ralf; Ming, Douglas W.; Yen, Albert S.; Clark, Benton C.; Morris, Richard V.; Schroder, Christian; Crumpler, Larry S.; Grant, John A.; Jolliff, Bradley L.; Arvidson, Raymond E.; Farrand, William H.; Herkenhoff, Kenneth E.; Bell, James F., III; Cohen, Barbara A.; Klingelhoefer, Goestar; Schrader, Christian M.; Rice, James W. (2018)
    We report the results of geological studies by the Opportunity Mars rover on the Endeavour Crater rim. Four major units occur in the region (oldest to youngest): the Matijevic, Shoemaker, Grasberg, and Burns formations. ...
  • Elemental Mapping by Dawn Reveals Exogenic H in Vesta's Regolith 
    Prettyman, Thomas H.; Mittlefehldt, David W.; Yamashita, Naoyuki; Lawrence, David J.; Beck, Andrew W.; Feldman, William C.; McCoy, Timothy J.; McSween, Harry Y.; Toplis, Michael J.; Titus, Timothy N.; Tricarico, Pasquale; Reedy, Robert C.; Hendricks, John S.; Forni, Olivier; Le Corre, Lucille; Li, Jian-Yang; Mizzon, Hugau; Reddy, Vishnu; Raymond, Carol A.; Russell, Christopher T. (2012)
    Using Dawn's Gamma Ray and Neutron Detector, we tested models of Vesta's evolution based on studies of howardite, eucrite, and diogenite (HED) meteorites. Global Fe/O and Fe/Si ratios are consistent with HED ...
  • Geology and Geochemistry of Noachian Bedrock and Alteration Events, Meridiani Planum, Mars: MER Opportunity Observations 
    Mittlefehldt, David W.; Gellert, Ralf; vanBommel, Scott; Arvidson, Raymond E.; Ashley, James W.; Clark, Benton C.; Crumpler, Larry S.; Farrand, William H.; Golombek, Matthew P.; Grant, John A.; Morris, Richard, V.; Schroder, Christian (2021)
    We have used Mars Exploration Rover Opportunity data to investigate the origin and alteration of lithic types along the western rim of Noachian-aged Endeavour crater on Meridiani Planum. Two geologic units are identified ...
  • HED Meteorites and Their Relationship to the Geology of Vesta and the Dawn Mission 
    McSween, Harry Y., Jr.; Mittlefehldt, David W.; Beck, Andrew W.; Mayne, Rhiannon G.; McCoy, Timothy J. (2011)
    Howardite-eucrite-diogenite (HED) meteorites, thought to be derived from 4 Vesta, provide the best sampling available for any differentiated asteroid. However, deviations in oxygen isotopic composition from a common ...
  • The Kaidun chondrite breccia: Petrology, oxygen isotopes, and trace element abundances 
    Macpherson, Glenn J.; Mittlefehldt, David W.; Lipschutz, Michael E.; Clayton, Robert N.; Bullock, Emma S.; Ivanov, Andrei V.; Mayeda, Toshiko K.; Wang, Ming-Sheng (2009)
    Oxygen isotope and trace element data for 13 samples of the Kaidun chondritic breccia reaffirm the complex polymict nature of this unique meteorite. Bulk Kaidun samples most closely resemble CR chondrites, but the matrix ...
  • Neutron absorption constraints on the composition of 4 Vesta 
    Prettyman, Thomas H.; Mittlefehldt, David W.; Yamashita, Naoyuki; Beck, Andrew W.; Feldman, William C.; Hendricks, John S.; Lawrence, David J.; McCoy, Timothy J.; McSween, Harry Y.; Peplowski, Patrick N.; Reedy, Robert C.; Toplis, Michael J.; Le Corre, Lucille; Mizzon, Hugau; Reddy, Vishnu; Titus, Timothy N.; Raymond, Carol A.; Russell, Christopher T. (2013)
    Global maps of the macroscopic thermal neutron absorption cross section of Vesta's regolith by the Gamma Ray and Neutron Detector (GRaND) on board the NASA Dawn spacecraft provide constraints on the abundance and ...
  • Sulfide-dominated partial melting pathways in brachinites 
    Crossley, Samuel D.; Ash, Richard D.; Sunshine, Jessica M.; Corrigan, Catherine M.; McCoy, Timothy J.; Mittlefehldt, David W.; Puchtel, Igor S. (2020)
    Petrogenetic relationships among members of the brachinite family were established by analyzing major and trace element concentrations of minerals for 9 representative specimens: Al Huwaysah 010, Eagles Nest, Northwest ...

Search DSpace

Browse

My Account