scholarly journals Scientists Turn Back Time to Track Methane Emissions on Mars

Eos ◽  
2022 ◽  
Vol 103 ◽  
Author(s):  
JoAnna Wendel
Keyword(s):  
Methane Emissions ◽  
Gale Crater ◽  
Curiosity Rover

Period spikes of methane on Mars could originate inside Gale crater, where NASA’s Curiosity rover is currently exploring.s

MORPHOLOGICAL DIVERSITY OF MARTIAN EOLIAN BEDFORMS AS REVEALED BY THE CURIOSITY ROVER AT GALE CRATER, MARS

2017 ◽  
Author(s):  
Mathieu G.A. Lapotre ◽  
◽  
Ryan C. Ewing ◽  
Ryan C. Ewing ◽  
Michael P. Lamb ◽  
...  
Keyword(s):  
Morphological Diversity ◽  
Gale Crater ◽  
Curiosity Rover

A surface gravity traverse on Mars indicates low bedrock density at Gale crater

Science ◽  
2019 ◽  
Vol 363 (6426) ◽  
pp. 535-537 ◽  
Author(s):  
Kevin W. Lewis ◽  
Stephen Peters ◽  
Kurt Gonter ◽  
Shaunna Morrison ◽  
Nicholas Schmerr ◽  
...  
Keyword(s):  
Gravitational Field ◽  
Precise Measurement ◽  
Attitude Determination ◽  
Sedimentary Rocks ◽  
Gravitational Acceleration ◽  
High Porosity ◽  
Rock Density ◽  
Gravitational Fields ◽  
Gale Crater ◽  
Curiosity Rover

Gravimetry, the precise measurement of gravitational fields, can be used to probe the internal structure of Earth and other planets. The Curiosity rover on Mars carries accelerometers normally used for navigation and attitude determination. We have recalibrated them to isolate the signature of the changing gravitational acceleration as the rover climbs through Gale crater. The subsurface rock density is inferred from the measured decrease in gravitational field strength with elevation. The density of the sedimentary rocks in Gale crater is 1680 ± 180 kilograms per cubic meter. This value is lower than expected, indicating a high porosity and constraining maximum burial depths of the rocks over their history.

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

2015 ◽  
Vol 112 (14) ◽  
pp. 4245-4250 ◽  
Author(s):  
Jennifer C. Stern ◽  
Brad Sutter ◽  
Caroline Freissinet ◽  
Rafael Navarro-González ◽  
Christopher P. McKay ◽  
...  
Keyword(s):  
Nitrogen Cycle ◽  
Volcanic Plume ◽  
Science Laboratory ◽  
Fixed Nitrogen ◽  
Total N ◽  
Gale Crater ◽  
Sedimentary Deposits ◽  
Aeolian Deposits ◽  
Aeolian Sediments ◽  
Curiosity Rover

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 N per sample. After subtraction of known N sources in SAM, our results support the equivalent of 110–300 ppm of nitrate in the Rocknest (RN) aeolian samples, and 70–260 and 330–1,100 ppm nitrate in John Klein (JK) and Cumberland (CB) mudstone deposits, respectively. Discovery of indigenous martian nitrogen in Mars surface materials has important implications for habitability and, specifically, for the potential evolution of a nitrogen cycle at some point in martian history. The detection of nitrate in both wind-drifted fines (RN) and in mudstone (JK, CB) is likely a result of N2 fixation to nitrate generated by thermal shock from impact or volcanic plume lightning on ancient Mars. Fixed nitrogen could have facilitated the development of a primitive nitrogen cycle on the surface of ancient Mars, potentially providing a biochemically accessible source of nitrogen.

scholarly journals Gale crater: the Mars Science Laboratory/Curiosity Rover Landing Site

2012 ◽  
Vol 12 (1) ◽  
pp. 25-38 ◽  
Author(s):  
James J. Wray
Keyword(s):  
Clay Minerals ◽  
Environmental Conditions ◽  
Spectral Properties ◽  
Landing Site ◽  
Science Laboratory ◽  
Deep Lakes ◽  
Mars Science Laboratory ◽  
Gale Crater ◽  
Diagenetic Processes ◽  
Curiosity Rover

AbstractGale crater formed from an impact on Mars ∼3.6 billion years ago. It hosts a central mound nearly 100 km wide and ∼5 km high, consisting of layered rocks with a variety of textures and spectral properties. The oldest exposed layers contain variably hydrated sulphates and smectite clay minerals, implying an aqueous origin, whereas the younger layers higher on the mound are covered by a mantle of dust. Fluvial channels carved into the crater walls and the lower mound indicate that surface liquids were present during and after deposition of the mound material. Numerous hypotheses have been advocated for the origin of some or all minerals and layers in the mound, ranging from deep lakes to playas to mostly dry dune fields to airfall dust or ash subjected to only minor alteration driven by snowmelt. The complexity of the mound suggests that multiple depositional and diagenetic processes are represented in the materials exposed today. Beginning in August 2012, the Mars Science Laboratory rover Curiosity will explore Gale crater by ascending the mound's northwestern flank, providing unprecedented new detail on the evolution of environmental conditions and habitability over many millions of years during which the mound strata accumulated.

Estimation of Water Content in Vera Rubin Ridge and Glen Torridon areas Based on Measurements of the MSL/DAN Instrument in Gale crater

2021 ◽  
Author(s):  
Sergei Nikiforov ◽  
Maya Djachkova ◽  
Igor Mitrofanov ◽  
Maxim Litvak ◽  
Denis Lisov ◽  
...  
Keyword(s):  
Water Content ◽  
Qualitative Difference ◽  
Bound Water ◽  
Data Set ◽  
Imaging Spectrometer ◽  
Gale Crater ◽  
Martian Soil ◽  
Notable Increase ◽  
Bound Water Content ◽  
Curiosity Rover

<p>This work presents the latest results on the estimations of Water Equivalent Hydrogen (WEH) gathered in martian areas Vera Rubin ridge (VRR) and Glen Torridon (GT) by the Dynamic Albedo of Neutron (DAN) instrument installed onboard NASA’s Curiosity rover. The main science objective of DAN is to study bound water content in shallow layer of martian subsurface down to 0.6 m [1].</p><p>Extensive scientific campaign on Vera Rubin ridge was started in the middle of 2017 and lasted until the beginning of 2019 when the rover reached another region – Glen Torridon. VRR is mostly related to hematite minerals that might be formed in the presence of liquid water. On the other hand, GT region is thought to be associated with clay minerals, according to CRISM observations [2].</p><p>We will present the latest results on DAN passive observations in these Mars areas. Data are referred to the period of more than 3 years of observations or MSL traverse segment from 17 km to 23 km. The main result is the notable increase of WEH in GT in comparison with VRR, as well as in comparison with the whole Curiosity traverse. Possibly, the increase may indicate on the qualitative difference in neutron-absorption elements that are forming the soil of the GT region.</p><p>References:</p><p>[1] <em>Mitrofanov, I. G., et al., (2014). Water and chlorine content in the Martian soil along the first 1900 m of the Curiosity rover traverse as estimated by the DAN instrument. J. Geophys. Res., 119(7), 1579–1596. doi:10.1002/2013JE004553.</em></p><p>[2] <em>Murchie, S. L., et al. (2009), Compact Reconnaissance Imaging Spectrometer for Mars investigation and data set from the Mars Reconnaissance Orbiter's primary science phase, J. Geophys. Res., 114, E00D07, doi:10.1029/2009JE003344.</em></p>

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