Preprints

Filtering by Subject: Planetary Geology

Preservation of Organic Carbon in Dolomitized Cambrian Stromatolites and Implications for Microbial Biosignatures in Diagenetically Replaced Carbonate Rock

Ashley Elizabeth Murphy, Scott T. Wieman, Juliane Gross, Jennifer C. Stern, Andrew Steele, Mihaela Glamoclija

Published: 2020-05-26
Subjects: Biogeochemistry, Earth Sciences, Geochemistry, Geology, Physical Sciences and Mathematics, Planetary Geology, Planetary Sciences

Stromatolites have been a major focus in the search for ancient microbial biosignatures, however, the organic carbon biosignatures of dolomitized stromatolites have not yet been fully characterized and correlated with their dolomitizing conditions. The lack in detailed dolomitic stromatolite studies is likely because dolomitization rarely preserves microbial morphology, which hampers the [...]

Coupling Mars ground and orbital views: generate viewsheds of Mastcam images from the Curiosity rover, using ArcGIS® and public datasets.

Marion Nachon, Schuyler Borges, Ryan Ewing, Frances Rivera-Hernández, Nathan Stein, Jason Van Beek

Published: 2020-04-30
Subjects: Other Planetary Sciences, Physical Sciences and Mathematics, Planetary Geology, Planetary Sciences

The Mastcam (Mast Camera) instrument onboard the NASA Curiosity rover provides an exclusive view of Mars: the color high-resolution Mastcam images allow users to study Gale crater’s geological terrains and landscapes along the rover path. This view from the ground complements the spatially broader view provided by spacecrafts from orbit. However, for a given Mastcam image, it can be challenging [...]

Tectono-magmatic, sedimentary and hydrothermal history of Arsinoes and Pyrrhae Chaos, Mars

Erica Luzzi, Angelo Pio Rossi, Cristian Carli, Francesca Altieri

Published: 2020-01-09
Subjects: Physical Sciences and Mathematics, Planetary Geology, Planetary Sciences

Arsinoes and Pyrrhae Chaos are two adjacent chaotic terrains located east of Valles Marineris and west of Arabia Terra, on Mars. In this work we produced a morpho‐stratigraphic map of the area, characterized by a volcanic bedrock disrupted into polygonal mesas and knobs (Chaotic Terrain Unit) and two non‐disrupted units. The latter present a spectral variation, likely associated with hydrated [...]

The effect of remote sensing resolution limits on aeolian sandstone measurements and the reconstruction of ancient dune fields on Mars: Numerical experiment using the Page Sandstone, Earth

Benjamin T. Cardenas, Travis Eric Swanson, Timothy A. Goudge, R. Wayne Wagner, David Mohrig

Published: 2019-09-10
Subjects: Physical Sciences and Mathematics, Planetary Geology, Planetary Sciences

The distribution of cross-set thicknesses is important field-collected data for reconstructing ancient aeolian dune fields from the strata they accumulated, but most aeolian strata on Mars must be observed with remote sensing. We hypothesize that remote sensing resolution limits will affect cross-set thickness measurements and the dune field reconstructions that follow. Here, we test this [...]

A PCA-based framework for determining remotely-sensed geological surface orientations and their statistical quality

Daven Quinn, Bethany Ehlmann

Published: 2018-11-07
Subjects: Earth Sciences, Geology, Physical Sciences and Mathematics, Planetary Geology, Planetary Sciences, Planetary Sedimentology, Statistical Methodology, Statistics and Probability, Stratigraphy, Tectonics and Structure

The orientations of planar rock layers are fundamental to our understanding of structural geology and stratigraphy. Remote-sensing platforms including satellites, unmanned aerial vehicles (UAVs), and LIDAR scanners are increasingly used to build three-dimensional models of structural features on Earth and other planets. Remotely-gathered orientation measurements are straightforward to calculate [...]

Mars Global Simulant MGS-1: A Rocknest-based open standard for basaltic martian regolith simulants

Kevin Cannon, Daniel Britt, Trent Smith, Ralph Fritsche, Daniel Batcheldor

Published: 2018-06-04
Subjects: Physical Sciences and Mathematics, Planetary Geology, Planetary Sciences

The composition and physical properties of martian regolith are dramatically better understood compared to just a decade ago, particularly through the use of X-ray diffraction by the Curiosity rover. Because there are no samples of this material on Earth, researchers and engineers rely on terrestrial simulants to test future hardware and address fundamental science and engineering questions. Even [...]

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