Zobrazeno 1 - 10
of 41
pro vyhledávání: '"Gary E. Lofgren"'
Autor:
Kip V. Hodges, Carolyn M. Tewksbury-Christle, Catherine Juranek, Gary E. Lofgren, B. A. Adams, Susan M. Lederer, Sarah K. Noble, B. D. Monteleone, José M. Hurtado, D. W. Ming, James W. Rice, Adrian J. Brown, Brian M. Hynek, David A. Kring, C. a. Evans, Kelsey Young, A. Yingst, Lisa May, Barbara A. Cohen, C. M. Fortezzo, Barbara J. Tewksbury, Friedrich Hörz, Jennifer L. Heldmann, Brent Garry, Jonathan Meyer, D. Archer, Peter J. Isaacson, James A. Skinner, K. K. Klaus, Christopher D. Condit, John Gruener, Alicia Vaughan, Caroline Morisset, Dean Eppler, Margarita M. Marinova, William Carey, John Schutt, Greg Baiden, E. B. Rampe, Trevor G. Graff, Nina Lanza
Publikováno v:
Acta Astronautica. 90:224-241
Desert Research and Technology Studies (Desert RATS) is a multi-year series of hardware and operations tests carried out annually in the high desert of Arizona on the San Francisco Volcanic Field. These activities are designed to exercise planetary s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fc2d0a34b5e7e8449746b96a60e4c410
https://doi.org/10.1016/j.actaastro.2012.03.009
https://doi.org/10.1016/j.actaastro.2012.03.009
Autor:
C. M. Fortezzo, William J. Bluethmann, Jodi S. Graf, Friedrich Horz, James A. Skinner, Gary E. Lofgren, John Gruener, Ernest Bell, Dean Eppler, Marc Seibert
Publikováno v:
Acta Astronautica. 90:254-267
This report describes the traverse planning process for the Desert Research and Technology Studies (D-RATS) 2010 field simulation of a conceptual 14-day planetary mission. This activity took place between August 23 and September 17, 2010 in the San F
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::74dcd945a56d457e772485104c528392
https://doi.org/10.1016/j.actaastro.2012.02.008
https://doi.org/10.1016/j.actaastro.2012.02.008
Publikováno v:
Acta Astronautica. 90:406-415
The National Aeronautics and Space Administration (NASA) is working with international partners to develop the space architectures and mission plans necessary for human spaceflight beyond Earth orbit. The Apollo missions to the Moon demonstrated conc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cfe8ee6eb1123364366d44b9005c111e
https://doi.org/10.1016/j.actaastro.2011.12.006
https://doi.org/10.1016/j.actaastro.2011.12.006
Publikováno v:
Meteoritics & Planetary Science. 41:1059-1071
Dynamic crystallization experiments on the ordinary chondrite Queen Alexandra Range (QUE) 97008 document textural features that occur in partially melted chondrules with changes in the degree of partial melting and cooling rate. We carried out a matr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c88547c7e7cb9ede28ecc5229856804f
https://doi.org/10.1111/j.1945-5100.2006.tb00504.x
https://doi.org/10.1111/j.1945-5100.2006.tb00504.x
Autor:
Michael J. Zieg, Gary E. Lofgren
Publikováno v:
Journal of Volcanology and Geothermal Research. 154:74-88
Textural evolution during a controlled cooling experiment has been quantified using bulk textural characterizations (mean crystal length, total numbers of crystals and modal olivine content) and crystal size distributions (CSDs). The experiments invo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3efcb014959b85334161a2f366029c25
https://doi.org/10.1016/j.jvolgeores.2005.09.020
https://doi.org/10.1016/j.jvolgeores.2005.09.020
Publikováno v:
American Mineralogist. 86:589-600
Megaspherulites occur in the middle zone of a thick sequence of rhyolitic vitrophyre that occupies a small, late Eocene to early Oligocene volcanic-tectonic basin near Silver Cliff, Custer County, Colorado. Diameters of the megaspherulites range from
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::620ccea06e5dce8b3498f25de7e4bdc5
https://doi.org/10.2138/am-2001-5-601
https://doi.org/10.2138/am-2001-5-601
Autor:
D. C. Golden, Howard V. Lauer, C. Schwandt, Gary E. Lofgren, Gordon A. McKay, Douglas W. Ming, Richard V. Morris, R. A. Socki
Publikováno v:
American Mineralogist. 86:370-375
We show experimental evidence that the zoned Mg-Fe-Ca carbonates, magnetite, and Fe sulfides in Martian meteorite ALH84001 may have formed by simple, inorganic processes. Chemically zoned carbonate globules and Fe sulfides were rapidly precipitated u
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b76f8f32bfa2dbe5aab8d250c5fcbf5f
https://doi.org/10.2138/am-2001-2-321
https://doi.org/10.2138/am-2001-2-321
Publikováno v:
Meteoritics & Planetary Science. 35:363-371
The observed textures and chemistry of Ca-Al-rich inclusions (CAIs) are presumed to be the culmination of a series of repeated heating and cooling events in the early history of the solar nebula. We have examined the effects of these heating/cooling
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3aa7443f69ed33c5c3c796da2717ef82
https://doi.org/10.1111/j.1945-5100.2000.tb01782.x
https://doi.org/10.1111/j.1945-5100.2000.tb01782.x
Autor:
Gary E. Lofgren, Timothy J. McCoy
Publikováno v:
Earth and Planetary Science Letters. 173:397-411
Spherulites are usually rounded or spherical objects found in rhyolitic obsidian. They usually comprise acicular crystals of alkali feldspar that radiate from a single point. The radiating array of crystalline fibers typically have a similar crystall
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::64e87b58fa4be3d45c1aaee7efb7da7a
https://doi.org/10.1016/s0012-821x(99)00241-1
https://doi.org/10.1016/s0012-821x(99)00241-1
Publikováno v:
Meteoritics & Planetary Science. 34:735-746
To Test whether Aubrites can be formed by melting of enstatite Chondrites and to understand igneous processes at very low oxygen fugacities, we have conducted partial melting experiments on the Indarch (EH4) chondrite at 1000-1500 C. Silicate melting
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::53785241c2eefc77e6439b4edf62c4f8
https://doi.org/10.1111/j.1945-5100.1999.tb01386.x
https://doi.org/10.1111/j.1945-5100.1999.tb01386.x