Search Results - "SQUYRES, S. W"

Detection of Silica-Rich Deposits on Mars by Squyres, S.W, Arvidson, R.E, Ruff, S, Gellert, R, Morris, R.V, Ming, D.W, Crumpler, L, Farmer, J.D, Marais, D.J. Des, Yen, A, McLennan, S.M, Calvin, W, Bell, J.F. III, Clark, B.C, Wang, A, McCoy, T.J, Schmidt, M.E, de Souza, P.A. Jr

“…Mineral deposits on the martian surface can elucidate ancient environmental conditions on the planet. Opaline silica deposits (as much as 91 weight percent…”
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Compositional stratigraphy of clay-bearing layered deposits at Mawrth Vallis, Mars by Wray, J. J., Ehlmann, B. L., Squyres, S. W., Mustard, J. F., Kirk, R. L.

“…Phyllosilicates have previously been detected in layered outcrops in and around the Martian outflow channel Mawrth Vallis. CRISM spectra of these outcrops…”
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Alpha Particle X-Ray Spectrometer (APXS): Results from Gusev crater and calibration report by Gellert, R, Rieder, R, Brueckner, J, Clark, B C, Dreibus, G, Klingelhoefer, G, Lugmair, G, Ming, D W, Waenke, H, Yen, A, Zipfel, J, Squyres, S W

“…The chemical composition of rocks and soils on Mars analyzed during the Mars Exploration Rover Spirit Mission was determined by X‐ray analyses with the Alpha…”
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Jarosite and Hematite at Meridiani Planum from Opportunity's Mössbauer Spectrometer by Klingelhöfer, G., Morris, R. V., Bernhardt, B., Schröder, C., Rodionov, D. S., de Souza, P. A., Yen, A., Gellert, R., Evlanov, E. N., Zubkov, B., Foh, J., Bonnes, U., Kankeleit, E., Gütlich, P., Ming, D. W., Renz, F., Wdowiak, T., Squyres, S. W., Arvidson, R. E.

“…Mössbauer spectra measured by the Opportunity rover revealed four mineralogical components in Meridiani Planum at Eagle crater: jarosite- and hematite-rich…”
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Columbus crater and other possible groundwater-fed paleolakes of Terra Sirenum, Mars by Wray, J. J., Milliken, R. E., Dundas, C. M., Swayze, G. A., Andrews-Hanna, J. C., Baldridge, A. M., Chojnacki, M., Bishop, J. L., Ehlmann, B. L., Murchie, S. L., Clark, R. N., Seelos, F. P., Tornabene, L. L., Squyres, S. W.

“…Columbus crater in the Terra Sirenum region of the Martian southern highlands contains light‐toned layered deposits with interbedded sulfate and phyllosilicate…”
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Chemistry of Rocks and Soils at Meridiani Planum from the Alpha Particle X-ray Spectrometer by Rieder, R., Gellert, R., Anderson, R. C., Brückner, J., Clark, B. C., Dreibus, G., Economou, T., Klingelhöfer, G., Lugmair, G. W., Ming, D. W., Squyres, S. W., d'Uston, C., Wänke, H., Yen, A., Zipfel, J.

“…The Alpha Particle X-ray Spectrometer on the Opportunity rover determined major and minor elements of soils and rocks in Meridiani Planum. Chemical…”
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Aeolian processes at the Mars Exploration Rover Meridiani Planum landing site by Weitz, C. M, Malin, M, Yen, A, Grotzinger, J, Squyres, S. W, Greeley, R, Golombek, M, Calvin, W, Jerolmack, D, Watters, W. A, Bell, J. F, Thompson, S, Banfield, D, Soderblom, L. A, Sullivan, R, Ming, D, Fike, D, Herkenhoff, K

“…The martian surface is a natural laboratory for testing our understanding of the physics of aeolian (wind-related) processes in an environment different from…”
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Chemistry of Rocks and Soils in Gusev Crater from the Alpha Particle X-ray Spectrometer by Gellert, R., Rieder, R., Anderson, R. C., Brückner, J., Clark, B. C., Dreibus, G., Economou, T., Klingelhöfer, G., Lugmair, G. W., Ming, D. W., Squyres, S. W., d'Uston, C., Wänke, H., Yen, A., Zipfel, J.

“…The alpha particle x-ray spectrometer on the Spirit rover determined major and minor elements of soils and rocks in Gusev crater in order to unravel the…”
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Sulfates hydrating bulk soil in the Martian low and middle latitudes by Karunatillake, S., Wray, J. J., Gasnault, O., McLennan, S. M., Rogers, A. D., Squyres, S. W., Boynton, W. V., Skok, J. R., Ojha, L., Olsen, N.

“…The evidence for sulfate‐bearing strata, across Late‐Noachian to Amazonian eons, suggests a central role for sulfates in acidity and salinity of Martian…”
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Global Distribution of Neutrons from Mars: Results from Mars Odyssey by Feldman, W. C., Boynton, W. V., Tokar, R. L., Prettyman, T. H., Gasnault, O., Squyres, S. W., Elphic, R. C., Lawrence, D. J., Lawson, S. L., Maurice, S., McKinney, G. W., Moore, K. R., Reedy, R. C.

“…Global distributions of thermal, epithermal, and fast neutron fluxes have been mapped during late southern summer/northern winter using the Mars Odyssey…”
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Global distribution of near-surface hydrogen on Mars by Feldman, W. C., Prettyman, T. H., Maurice, S., Plaut, J. J., Bish, D. L., Vaniman, D. T., Mellon, M. T., Metzger, A. E., Squyres, S. W., Karunatillake, S., Boynton, W. V., Elphic, R. C., Funsten, H. O., Lawrence, D. J., Tokar, R. L.

“…Neutron data observed using the Neutron Spectrometer aboard 2001 Mars Odyssey provide a lower limit to the global inventory of Martian water‐equivalent…”
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Atmospheric Imaging Results from the Mars Exploration Rovers: Spirit and Opportunity by Lemmon, M. T., Wolff, M. J., Smith, M. D., Clancy, R. T., Banfield, D., Landis, G. A., Ghosh, A., Smith, P. H., Spanovich, N., Whitney, B., Whelley, P., Greeley, R., Thompson, S., Bell, J. F., Squyres, S. W.

“…A visible atmospheric optical depth of 0.9 was measured by the Spirit rover at Gusev crater and by the Opportunity rover at Meridiani Planum. Optical depth…”
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Erosion rates at the Mars Exploration Rover landing sites and long-term climate change on Mars by Golombek, M. P., Grant, J. A., Crumpler, L. S., Greeley, R., Arvidson, R. E., Bell III, J. F., Weitz, C. M., Sullivan, R., Christensen, P. R., Soderblom, L. A., Squyres, S. W.

“…Erosion rates derived from the Gusev cratered plains and the erosion of weak sulfates by saltating sand at Meridiani Planum are so slow that they argue that…”
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The new Athena alpha particle X-ray spectrometer for the Mars Exploration Rovers by Rieder, R., Gellert, R., Brückner, J., Klingelhöfer, G., Dreibus, G., Yen, A., Squyres, S. W.

“…The new alpha particle X‐ray spectrometer (APXS) is part of the Athena payload of the two Mars Exploration Rovers (MER). The APXS sensor head is attached to…”
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In situ and experimental evidence for acidic weathering of rocks and soils on Mars by Hurowitz, J. A., McLennan, S. M., Tosca, N. J., Arvidson, R. E., Michalski, J. R., Ming, D. W., Schröder, C., Squyres, S. W.

“…Experimental data for alteration of synthetic Martian basalts at pH = 0–1 indicate that chemical fractionations at low pH are vastly different from those…”
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Geochemical properties of rocks and soils in Gusev Crater, Mars: Results of the Alpha Particle X-Ray Spectrometer from Cumberland Ridge to Home Plate by Ming, D. W., Gellert, R., Morris, R. V., Arvidson, R. E., Brückner, J., Clark, B. C., Cohen, B. A., d'Uston, C., Economou, T., Fleischer, I., Klingelhöfer, G., McCoy, T. J., Mittlefehldt, D. W., Schmidt, M. E., Schröder, C., Squyres, S. W., Tréguier, E., Yen, A. S., Zipfel, J.

“…Geochemical diversity of rocks and soils has been discovered by the Alpha Particle X‐Ray Spectrometer (APXS) during Spirit's journey over Husband Hill and down…”
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Iron mineralogy and aqueous alteration from Husband Hill through Home Plate at Gusev Crater, Mars: Results from the Mössbauer instrument on the Spirit Mars Exploration Rover by Morris, R. V., Klingelhöfer, G., Schröder, C., Fleischer, I., Ming, D. W., Yen, A. S., Gellert, R., Arvidson, R. E., Rodionov, D. S., Crumpler, L. S., Clark, B. C., Cohen, B. A., McCoy, T. J., Mittlefehldt, D. W., Schmidt, M. E., de Souza Jr, P. A., Squyres, S. W.

“…Spirit's Mössbauer (MB) instrument determined the Fe mineralogy and oxidation state of 71 rocks and 43 soils during its exploration of the Gusev plains and the…”
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Phyllosilicates and sulfates at Endeavour Crater, Meridiani Planum, Mars by Wray, J. J., Noe Dobrea, E. Z., Arvidson, R. E., Wiseman, S. M., Squyres, S. W., McEwen, A. S., Mustard, J. F., Murchie, S. L.

“…Phyllosilicates have been identified on the Martian surface from orbit, and are hypothesized to have formed under wet, non‐acidic conditions early in the…”
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Sulfate deposition in subsurface regolith in Gusev crater, Mars by Wang, Alian, Haskin, L. A., Squyres, S. W., Jolliff, B. L., Crumpler, L., Gellert, R., Schröder, C., Herkenhoff, K., Hurowitz, J., Tosca, N. J., Farrand, W. H., Anderson, Robert, Knudson, A. T.

“…Excavating into the shallow Martian subsurface has the potential to expose stratigraphic layers and mature regolith, which may hold a record of more ancient…”
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Mineralogy at Gusev Crater from the Mössbauer Spectrometer on the Spirit Rover by Morris, R. V., Klingelhöfer, G., Bernhardt, B., Schröder, C., Rodionov, D. S., de Souza, P. A., Yen, A., Gellert, R., Evlanov, E. N., Foh, J., Kankeleit, E., Gütlich, P., Ming, D. W., Renz, F., Wdowiak, T., Squyres, S. W., Arvidson, R. E.

“…Mössbauer spectra measured on Mars by the Spirit rover during the primary mission are characterized by two ferrous iron doublets (olivine and probably…”
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