Cynthia K. Little

Radiation-induced alteration of apatite on the surface of Mars: first in situ observations with SuperCam Raman onboard Perseverance

Elise Clavé, Sylvain Bernard, Susanne Schröder, Kristin Rammelkamp et autres

Planetary exploration relies considerably on mineral characterization to advance our understanding of the solar system, the planets and their evolution. Thus, we must understand past and present processes that can alter materials exposed on the surface, affecting space mission data. Here, we …

de, fr, us, es, it, ca, dk (code pays fourni par la source)

Restoration of the Autofocus capability of the ChemCam instrument onboard the Curiosity rover

Laurent Péret, Olivier Gasnault, Robert Dingler, Y. Langevin et autres

fr, us, my (code pays fourni par la source)

Evidence for indigenous nitrogen in sedimentary and aeolian deposits from the Curiosity rover investigations at Gale crater, Mars

Jennifer C. Stern, B. Sutter, Caroline Freissinet, Rafael Navarro-González et autres

The Sample Analysis at Mars (SAM) investigation on the Mars Science Laboratory (MSL) Curiosity rover has detected oxidized nitrogen-bearing compounds during pyrolysis of scooped aeolian sediments and drilled sedimentary deposits within Gale crater. Total N concentrations ranged from 20 to 250 nmol …

us, mx, fr, es, lu, se, cn (code pays fourni par la source)

Volatile and Organic Compositions of Sedimentary Rocks in Yellowknife Bay, Gale Crater, Mars

D. W. Ming, Paul Douglas Archer, Daniel P. GLAVIN, J. L. Eigenbrode et autres

H2O, CO2, SO2, O2, H2, H2S, HCl, chlorinated hydrocarbons, NO, and other trace gases were evolved during pyrolysis of two mudstone samples acquired by the Curiosity rover at Yellowknife Bay within Gale crater, Mars. H2O/OH-bearing phases included 2:1 phyllosilicate(s), bassanite, akaganeite, and …

us, fr, ca, gb, mx, fi, au (code pays fourni par la source)

Mars’ Surface Radiation Environment Measured with the Mars Science Laboratory’s Curiosity Rover

Donald M. Hassler, Cary J. Zeitlin, Robert F. Wimmer-Schweingruber, Bent Ehresmann et autres

The Radiation Assessment Detector (RAD) on the Mars Science Laboratory's Curiosity rover began making detailed measurements of the cosmic ray and energetic particle radiation environment on the surface of Mars on 7 August 2012. We report and discuss measurements of the absorbed …

us, de, fr, es (code pays fourni par la source)

Mineralogy of a Mudstone at Yellowknife Bay, Gale Crater, Mars

David T. Vaniman, D. L. Bish, D. W. Ming, T. F. Bristow et autres

Sedimentary rocks at Yellowknife Bay (Gale crater) on Mars include mudstone sampled by the Curiosity rover. The samples, John Klein and Cumberland, contain detrital basaltic minerals, calcium sulfates, iron oxide or hydroxides, iron sulfides, amorphous material, and trioctahedral smectites. The John Klein …

us, fr, gb (code pays fourni par la source)

A Habitable Fluvio-Lacustrine Environment at Yellowknife Bay, Gale Crater, Mars

J. P. Grotzinger, Dawn Y. Sumner, Linda C. Kah, Kathryn M. Stack et autres

The Curiosity rover discovered fine-grained sedimentary rocks, which are inferred to represent an ancient lake and preserve evidence of an environment that would have been suited to support a martian biosphere founded on chemolithoautotrophy. This aqueous environment was characterized by neutral pH, …

us, gb, fr, ca (code pays fourni par la source)

Elemental Geochemistry of Sedimentary Rocks at Yellowknife Bay, Gale Crater, Mars

S. M. McLennan, R. B. Anderson, James F. Bell III, J. C. Bridges et autres

Sedimentary rocks examined by the Curiosity rover at Yellowknife Bay, Mars, were derived from sources that evolved from an approximately average martian crustal composition to one influenced by alkaline basalts. No evidence of chemical weathering is preserved, indicating arid, possibly cold, paleoclimates …

us, gb, ca, fr, au (code pays fourni par la source)

Volatile, Isotope, and Organic Analysis of Martian Fines with the Mars Curiosity Rover

Laurie A. Leshin, Paul Robert Mahaffy, C. R. Webster, Michel Cabane et autres

Samples from the Rocknest aeolian deposit were heated to ~835°C under helium flow and evolved gases analyzed by Curiosity's Sample Analysis at Mars instrument suite. H2O, SO2, CO2, and O2 were the major gases released. Water abundance (1.5 to 3 weight percent) …

us, fr, mx (code pays fourni par la source)

X-ray Diffraction Results from Mars Science Laboratory: Mineralogy of Rocknest at Gale Crater

D. L. Bish, D. Blake, D. T. Vaniman, S. J. Chipera et autres

The Mars Science Laboratory rover Curiosity scooped samples of soil from the Rocknest aeolian bedform in Gale crater. Analysis of the soil with the Chemistry and Mineralogy (CheMin) x-ray diffraction (XRD) instrument revealed plagioclase (~An57), forsteritic olivine (~Fo62), augite, and pigeonite, with …

us (code pays fourni par la source)

The Petrochemistry of Jake_M: A Martian Mugearite

Edward M. Stolper, M. B. Baker, Megan Newcombe, M. E. Schmidt et autres

"Jake_M," the first rock analyzed by the Alpha Particle X-ray Spectrometer instrument on the Curiosity rover, differs substantially in chemical composition from other known martian igneous rocks: It is alkaline (>15% normative nepheline) and relatively fractionated. Jake_M is compositionally similar to terrestrial …

us, ca, fr, au (code pays fourni par la source)

Soil Diversity and Hydration as Observed by ChemCam at Gale Crater, Mars

Pierre‐Yves Meslin, Olivier Gasnault, O. Forni, Susanne Schröder et autres

The ChemCam instrument, which provides insight into martian soil chemistry at the submillimeter scale, identified two principal soil types along the Curiosity rover traverse: a fine-grained mafic type and a locally derived, coarse-grained felsic type. The mafic soil component is representative of …

fr, us, de, fi, ca, dk (code pays fourni par la source)