A5065418268- Planetary Science and Exploration
- Astro and Planetary Science
- Space Exploration and Technology
- Geology and Paleoclimatology Research
- Space Science and Extraterrestrial Life
- Geochemistry and Geologic Mapping
- Methane Hydrates and Related Phenomena
- Hydrocarbon exploration and reservoir analysis
- Marine and environmental studies
- Mineralogy and Gemology Studies
- Geological and Geochemical Analysis
- Maritime and Coastal Archaeology
- Scientific Research and Discoveries
- Paleontology and Stratigraphy of Fossils
- Geological Studies and Exploration
- Archaeology and ancient environmental studies
- Spaceflight effects on biology
- Service-Learning and Community Engagement
- Historical and Architectural Studies
- Scientific Computing and Data Management
- Aeolian processes and effects
- Geological formations and processes
- Spectroscopy and Chemometric Analyses
- Clay minerals and soil interactions
- Atmospheric and Environmental Gas Dynamics
Planetary Science Institute
2010-2023
Ames Research Center
2004-2019
KISS Institute for Practical Robotics
2015
Oak Ridge Associated Universities
2015
Jet Propulsion Laboratory
2004-2010
Space Science Institute
2004-2010
California Institute of Technology
2007-2009
Search for Extraterrestrial Intelligence
2004-2008
University of California, Santa Cruz
2008
Stanford University
2008
Martian aqueous mineral deposits have been examined and characterized using data acquired during Mars Reconnaissance Orbiter's (MRO) primary science phase, including Compact Imaging Spectrometer for hyperspectral images covering the 0.4–3.9 μ m wavelength range, coordinated with higher–spatial resolution HiRISE Context Imager images. MRO's new high‐resolution measurements, combined earlier from Thermal Emission Spectrometer; System; Observatoire pour la Minéralogie, L'Eau, les Glaces et...
The Mars Global Surveyor Orbiter Camera has acquired data that establish the present-day impact cratering rate and document new deposits formed by downslope movement of material in mid-latitude gullies on Mars. Twenty impacts created craters 2 to 150 meters diameter within an area 21.5 × 10 6 square kilometers between May 1999 March 2006. values predicted models scale lunar are close observed rate, implying surfaces devoid truly young as yet unrecognized processes denudation must be...
Observations by the Mars Reconnaissance Orbiter/Compact Imaging Spectrometer for in Mawrth Vallis region show several phyllosilicate species, indicating a wide range of past aqueous activity. Iron/magnesium (Fe/Mg)–smectite is observed light-toned outcrops that probably formed via alteration basalt ancient cratered terrain. This unit overlain rocks rich hydrated silica, montmorillonite, and kaolinite may have subsequent leaching Fe Mg through extended events or change chemistry. A spectral...
Juventae Chasma contains four light‐toned sulfate‐bearing mounds (denoted here as A–D from west to east) inside the trough, mafic outcrops at base of and in wall rock, layered deposits opal ferric sulfates on plateau. Hyperspectral visible/near‐infrared Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) spectra were used identify monohydrated polyhydrated sulfate (PHS) material bright mounds. Most signatures closely resemble those szomolnokite (FeSO 4 ·H 2 O), characterized by a...
Mawrth Vallis contains one of the largest exposures phyllosilicates on Mars. Nontronite, montmorillonite, kaolinite, and hydrated silica have been identified throughout region using data from Compact Reconnaissance Imaging Spectrometer for Mars (CRISM). In addition, saponite has in observation within a crater. These individual minerals are distinguished by features at 1.38–1.42, ∼1.91, 2.17–2.41 μ m. There two main phyllosilicate units region. The lowermost unit is nontronite bearing,...
Analyses of MRO/CRISM images the greater Mawrth Vallis region Mars affirm presence two primary phyllosilicate assemblages throughout a ∼1000 × 1000 km. These units consist an Fe/Mg‐phyllosilicate assemblage overlain by Al‐phyllosilicate and hydrated silica assemblage. The lower unit contains Fe/Mg‐smectites, sometimes combined with one or more these other Fe/Mg‐phyllosilicates: serpentine, chlorite, biotite, and/or vermiculite. It is than 100 m thick finely layered at meter scales. upper...
The Eridania region in the southern highlands of Mars once contained a vast inland sea with volume water greater than that all other Martian lakes combined. Here we show most ancient materials within are thick (>400 m), massive (not bedded), mottled deposits containing saponite, talc-saponite, Fe-rich mica (for example, glauconite-nontronite), Fe- and Mg-serpentine, Mg-Fe-Ca-carbonate probable Fe-sulphide likely formed deep (500-1,500 m) hydrothermal setting. basin occurs some terrain on...
Panoramic Camera images at Gusev crater reveal a rock-strewn surface interspersed with high- to moderate-albedo fine-grained deposits occurring in part as drifts or small circular swales hollows. Optically thick coatings of ferric iron-rich dust dominate most bright soil and rock surfaces. Spectra some darker surfaces regions exposed by brushing grinding show near-infrared spectral signatures consistent the presence mafic silicates such pyroxene olivine. Atmospheric observations steady...
Panoramic Camera (Pancam) images from Meridiani Planum reveal a low-albedo, generally flat, and relatively rock-free surface. Within around impact craters fractures, laminated outcrop rocks with higher albedo are observed. Fine-grained materials include dark sand, bright ferric iron-rich dust, angular rock clasts, millimeter-size spheroidal granules that eroding out of the rocks. Spectra one plains consistent mafic silicates such as pyroxene olivine. both spherules indicate presence...
Phyllosilicates have been identified on the Martian surface from orbit, and are hypothesized to formed under wet, non‐acidic conditions early in planet's history. Exposures of these minerals not yet examined by a landed mission. Using Mars Reconnaissance Orbiter data, we report detection phyllosilicate‐bearing outcrops that may be accessible Exploration Rover Opportunity currently exploring Meridiani Planum. The phyllosilicates associated with layered, polygonally fractured rocks exposed rim...
Research Article| October 01, 2007 Evidence for a sedimentary origin of clay minerals in the Mawrth Vallis region, Mars Joseph R. Michalski; Michalski 1Jet Propulsion Laboratory, M.S. 183-501, 4800 Oak Grove, Pasadena, California 91109, USA Search other works by this author on: GSW Google Scholar Eldar Z. Noe Dobrea 2Malin Space Science Systems, P.O. Box 910148, San Diego, 92121, Geology (2007) 35 (10): 951–954. https://doi.org/10.1130/G23854A.1 Article history received: 15 Mar rev-recd: 04...
The previous discovery of extensive deposits hydrated minerals in Olympia Planum the north polar region Mars by Express OMEGA instrument raises important questions about origin and subsequent redistribution these minerals. Here we present a new map distribution within applying both standard spectral analysis techniques to near‐infrared data from OMEGA. Our results are agreement with observations but also show more detections throughout circumpolar plains, as well on surface Boreum troughs....
Abstract A strategy for planetary exploration using a rover capable of science autonomy is presented. We encoded into set driving hypotheses pertaining to the geologic origin field site and equipped with instrumentation needed measure observables related hypotheses, as well software tools analyze them relatively high level confidence. investigated effects different strategies that make use compared operational efficiency yield three geological scenarios: (1) standard human-directed...
Orbital topographic, image, and spectral data show that sulfate‐ hematite‐bearing plains deposits similar to those explored by the MER rover Opportunity unconformably overlie northeastern portion of 160 km in diameter Miyamoto crater. Crater floor materials exhumed west contact exhibit CRISM OMEGA NIR signatures consistent with presence Fe/Mg‐rich smectite phyllosilicates. Based on superposition relationships, phyllosilicate‐bearing formed either in‐situ or were deposited crater prior...
We have conducted a spectroscopic analysis of the rim and interior Endeavour Crater using CRISM data in order to further constrain mineralogical variability area identify targets interest for in‐situ by Opportunity. Our reveals that spectral character both sulfates phyllosilicates is more diverse than has been reported date, with present on crater as well surrounding plains. Spectra adjacent crater's mound exhibit features are consistent component Ca‐sulfates. The Fe/Mg smectites, but there...
We used emissivity spectra from the Thermal Emission Spectrometer (TES) to identify signature of crystalline gray hematite in Capri Chasma. Geologic units associated with major concentrations were then mapped using HiRISE, CRISM, and CTX images Mars Reconnaissance Orbiter (MRO). Along northern portion Interior Layered Deposit (ILD), a lower polyhydrated sulfate (PHS) unit lies beneath thicker kieserite unit, above which is thinner upper PHS. An exposure at thickest central ILD reveals...
Visible and near-infrared wavelength (VNIR, λ = 0.35-5 mm) laboratory diffuse reflectance spectra corresponding optical functions (real imaginary refractive indices) for several iron sulfates (natural K- Na-jarosite, szomolnokite, rhomboclase) are presented. On Mars, jarosite has been identified in Meridiani Planum, Mawrth Vallis, Melas Chasma, Eridania Basin; szomolnokite found as distinct layers at Columbus Crater outcrops Juventae rhomboclase Gusev Crater. Constraining the mineralogy...
Abstract We spectrally characterize ( λ = 0.35–10 µm) the low‐humidity polymorph of kieserite (MgSO 4 ·H 2 O), which is abundant on Mars and likely present Europa, at various grain sizes temperatures (100–300 K) relevant to surfaces Europa. Compositional analysis these often relies remote sensing using imaging spectrometers such as Reconnaissance Orbiter Compact Imaging Spectrometer for (CRISM), Express Observatoire pour la Minéralogie, l'Eau, les Glaces et l'Activité, Galileo Near‐Infrared...
Abstract A system for rapid analysis of spectroscopy data with emphasis on planetary surfaces, both imaging and single-spectrum data, is described. The system, called Tetracorder, commanded by an expert developed spectroscopists. Tetracorder the apply multiple algorithms to analyze a spectrum in segments, leveraging advantages each spectral region’s sensitivity detecting different compounds, whether solid, liquid, or gas. compare measured spectra properties materials libraries. libraries...