Astrogeology Science Center

Publications

Filter Total Items: 860
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Year Published: 2019

Clastic pipes and mud volcanism across Mars: Terrestrial analog evidence of past Martian groundwater and subsurface fluid mobilization

Clastic pipes are cylindrical injection features that vertically crosscut bedding with sharp contacts. Terrestrial pipes have cylindrical morphologies, massive or radially graded interiors, and raised outer rims. Increased grain size and subsequent cementation along the more porous edges makes the rims more resistant to weathering. Pipes have...

Wheatley, D. F.; Chan, M. A.; Okubo, Chris

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Year Published: 2019

The compositions of the lunar crust and upper mantle: Spectral analysis of the inner rings of lunar impact basins

The innermost ring in impact basins exposes material originating from various depths, and can be used to study the composition of the lunar crust with depth. In this study, we conduct quantitative mineralogical analyses of the innermost ring in 13 lunar impact basins using reflectance data from the Kaguya Multiband Imager and...

Lemelin, Myriam; Lucey, Paul G.; Miljković, Katarina; Gaddis, Lisa R.; Hare, Trent M.; Ohtake, Makiko

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Year Published: 2019

The formation of gullies on Mars today

A decade of high-resolution monitoring has revealed extensive activity in fresh Martian gullies. Flows within the gullies are diverse: they can be relatively light, neutral or dark, colourful or bland, and range from superficial deposits to 10 m-scale topographic changes. We observed erosion and transport of material within gullies, new terraces,...

Dundas, Colin M.; McEwen, Alfred S.; Diniega, Serina; Hansen, Candice J.; McElwaince, Jim N.

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Year Published: 2019

The flood lavas of Kasei Valles, Mars

Both the northern and southern arms of Kasei Valles are occupied by platy-ridged flood lavas. We have mapped these flows and examined their morphology to better understand their emplacement. The lavas were emplaced as high-flux, turbulent flows (exceeding 106 m3 s−1). Lava in southern Kasei Valles can be traced back up onto the...

Dundas, Colin M.; Cushing, Glen E.; Kestay, Laszlo P.

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Year Published: 2019

The NASA Roadmap to Ocean Worlds

In this article, we summarize the work of the NASA Outer Planets Assessment Group (OPAG) Roadmaps to Ocean Worlds (ROW) group. The aim of this group is to assemble the scientific framework that will guide the exploration of ocean worlds, and to identify and prioritize science objectives for ocean worlds over the next several decades. The...

Hendrix, A. Noble; Hurford, T.; Barge, L.M.; Bland, Michael T.; Bowman, J.S.; Brinckerhoff, W.; Buratti, B.J.; Cable, M.; Castillo-Rogez, J. C.; Collins, G. C.; Diniega, S.; German, C.R.; Hayes, A.G.; Hoehler, T.M.; Hosseini, S. Mehran; Howett, C.; McEwen, A.S.; Neish, C.; Neveu, M.; Nordheim, T.A.; Patterson, G.W.; Patthoff, D.A.; Phillips, C.; Rhoden, A.; Schmidt, B.; Singer, K.; Soderblom, J. M.; Vance, S.D.

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Year Published: 2019

Impact cratering of Mercury

No abstract available.

Chapman, Clark R.; Baker, David M. H.; Barnouin, Olivier S.; Fassett, Caleb I.; Marchi, Simone; Merline, William; Ostrach, Lillian; Prockter, Louise; Strom, Robert G.

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Year Published: 2019

The volcanic character of Mercury

No abstract available.

Byrne, Paul K; Whitten, Jennifer L; Klimczak, Christian; McCubbin, Francis M.; Ostrach, Lillian

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Year Published: 2019

Overview of spirit microscopic imager results

This paper provides an overview of Mars Exploration Rover Spirit Microscopic Imager (MI) operations and the calibration, processing, and analysis of MI data. The focus of this overview is on the last five Earth years (2005–2010) of Spirit's mission in Gusev crater, supplementing the previous overview of the first 450 sols of the...

Herkenhoff, Kenneth E.; Squyres, Steve W; Arvidson, Raymond E.; Cole, Shoshanna B; Sullivan, Rob; Yingst, Aileen; Cabrol, Nathalie; Lee, Ella (Contractor); Richie, Janet; Sucharski, Robert M.; Calef, Fred J.; Bell, James F. ; Chapman, Mary; Geissler, Paul; Edgar, Lauren A.; Franklin, Brenda; Hurowitz, Joel A.; Jensen, Elsa; Johnson, Jeffrey R.; Kirk, Randolph L.; Lanagan, Peter; Mullins, Kevin; Leff, Craig; Maki, Justin; Redding, Bonnie L.; Rice, Melissa; Sims, Michael H.; Springer, Richard; Sunda, Annette; Spanovich, Nicole; Soderblom, Laurence A.; Vaughan, Alicia

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Year Published: 2019

Bright carbonate surfaces on Ceres as remnants of salt-rich water fountains

Vinalia and Cerealia Faculae are bright and salt-rich localized areas in Occator crater on Ceres. The predominance of the near-infrared signature of sodium carbonate on these surfaces suggests their original material was a brine. Here we analyze Dawn Framing Camera's images and characterize the surfaces as composed of a central structure, either a...

Ottavian Ruesch; Quick, Lynnae; Landis, Margaret Evelyn; Sori, M.M.; Čadek, O.; Brož, P.; Otto, K.A.; Bland, Michael T.; Byrne, S.; Castillo-Rogez, J.C.; Hiesinger, H.; Jaumann, R.; Krohn, K.; McFadden, L.A.; Nathues, A.; Neesemann, A.; Preusker, F.; Roatsch, T.; Schenk, P.M.; Scully, J.E.C.; Sykes, M.V.; Williams, D.A.; Raymond, C.A.; Russell., C.T.

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Year Published: 2018

Revisiting the Apollo photogrammetric mapping system

The integrated photogrammetric mapping system flown on the last three Apollo lunar missions (15, 16, and 17) in 1971 and 1972 incorporated a Metric (mapping) Camera, a high-resolution Panoramic Camera, and a star camera and laser altimeter to provide support data. The U.S. Geological Survey’s Astrogeology Science Center, the Intelligent Robotics...

Edmundson, Kenneth; Alexandrov, Oleg; Archinal, Brent; Becker, Kris J.; Becker, Tammy L; Mapel, Jesse; Moratto, Zachary M.; Nefian, Ara V.; Richie, Janet; Robinson, Mark S.; Shepherd, Makayla; Shinaman, John; Smith, Ethan

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Year Published: 2018

Degradation of 100‐m‐scale rocky ejecta craters at the InSight Landing Site on Mars and implications for surface processes and erosion rates in the hesperian and amazonian

Rocky ejecta craters (RECs) at the Interior Exploration using Seismic Investigations, Geodesy and Heat Transport (InSight) landing site on Elysium Planitia, Mars, provide constraints on crater modification and rates for the Hesperian and Amazonian. The RECs are between 10 m and 1.2 km in diameter and exhibit five classes of preservation...

Sweeney, J.; Warner, N. H; Ganti, V.; Golombek, Matthew P.; Lamb, M. P.; Fergason, Robin L.; Kirk, Randolph L.

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Year Published: 2018

Image mosaic and topographic maps of Mercury

Map DescriptionsSheet 1: This image mosaic is based on observations acquired by the Mercury Dual Imaging System (MDIS; Hawkins and others, 2009), an instrument on the National Aeronautics and Space Agency (NASA) MErcury Surface, Space ENvironment, Geochemistry, and Ranging (MESSENGER) spacecraft (Solomon and others, 2007). The Mercator projection...

Hunter, Marc A.; Hare, Trent M.; Hayward, Rosalyn K.; Chabot, Nancy L.; Hash, Christopher D.; Denevi, Brett W.; Ernst, Carolyn M.; Murchie, Scott L.; Blewett, David T.; Malaret, Erick R.; Solomon, Sean C.; Becker, Kris J.; Becker, Tammy L.; Weller, Lynn A.; Edmundson, Kenneth L.; Neuman, Gregory A.; Mazarico, Erwan; Perry, Mark E.
Hunter, M.A., Hare, T.M., Hayward, R.K., Chabot, N.L., Hash, C.D., Denevi, B.W., Ernst, C.M., Murchie, S.L., Blewett, D.T., Malaret, E.R., Solomon, S.C., Becker, K.J., Becker, T.L., Weller, L.A., Edmundson, K.L., Neuman, G.A., Mazarico, E., and Perry, M.E., 2018, Image mosaic and topographic maps of Mercury: U.S. Geological Survey Scientific Investigations Map 3404, scale 1:20,000,000 and 1:12,157,366, https://doi.org/10.3133/sim3404.