Topic
Duricrust
About: Duricrust is a research topic. Over the lifetime, 227 publications have been published within this topic receiving 4282 citations.
Papers published on a yearly basis
Papers
TL;DR: Elemental analyses of fines in the Martian regolith at two widely separated landing sites, Chryse Planitia and Utopia Planitia, produced remarkably similar results.
Abstract: Elemental analyses of fines in the Martian regolith at two widely separated landing sites, Chryse Planitia and Utopia Planitia, produced remarkably similar results. At both sites, the uppermost regolith contains abundant Si and Fe, with significant concentrations of Mg, Al, S, Ca, and Ti. The S concentration is one to two orders of magnitude higher, and K(<0.25 percent by weight) is at least 5 times lower than the average for the earth's crust. The trace elements Sr, Y, and possibly Zr, have been detected at concentrations near or below 100 parts per million. Pebblesized fragments sampled at Chryse contain more S than the bulk fines, and are thought to be pieces of a sulfate-cemented duricrust.
224 citations
California Institute of Technology1, State University of New York at Geneseo2, Smithsonian Institution3, Free University of Berlin4, University of Nantes5, Planetary Science Institute6, Imperial College London7, Kaiserslautern University of Technology8, Royal Observatory of Belgium9, Centre national de la recherche scientifique10, Institut supérieur de l'aéronautique et de l'espace11, Institut de Physique du Globe de Paris12, Johns Hopkins University13, Goddard Space Flight Center14, Institut Universitaire de France15, Cornell University16
TL;DR: The surficial geology of the landing site is characterized and observations are consistent with expectations made from remote sensing data prior to landing indicating a surface composed of an impact-fragmented regolith overlying basaltic lava flows.
Abstract: The Interior Exploration using Seismic Investigations, Geodesy and Heat Transport (InSight) spacecraft landed successfully on Mars and imaged the surface to characterize the surficial geology. Here we report on the geology and subsurface structure of the landing site to aid in situ geophysical investigations. InSight landed in a degraded impact crater in Elysium Planitia on a smooth sandy, granule- and pebble-rich surface with few rocks. Superposed impact craters are common and eolian bedforms are sparse. During landing, pulsed retrorockets modified the surface to reveal a near surface stratigraphy of surficial dust, over thin unconsolidated sand, underlain by a variable thickness duricrust, with poorly sorted, unconsolidated sand with rocks beneath. Impact, eolian, and mass wasting processes have dominantly modified the surface. Surface observations are consistent with expectations made from remote sensing data prior to landing indicating a surface composed of an impact-fragmented regolith overlying basaltic lava flows.
154 citations
TL;DR: A geochronology of 147 grains of goethite cements extracted from ferruginous duricrusts (cangas) developed on banded iron-formations from the Quadrilatero Ferrifero region, Minas Gerais, Brazil, records a history of protracted mineral dissolution as discussed by the authors.
130 citations
TL;DR: An integrated study of O and H isotopes in the lateritic profile of Yaou, French Guiana, was undertaken to investigate the usefulness of stable isotopes as tracers of climatic changes in continental environments.
83 citations
TL;DR: In this article, the authors used a chemical remanent magnetization (CRM) signal to interpret the succession of horizons, from the weathering front to the top of the duricrust surface of a thick bauxitic profile in French Guiana.
82 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2021 | 6 |
| 2020 | 7 |
| 2019 | 11 |
| 2018 | 12 |
| 2017 | 10 |
| 2016 | 10 |