Capri Chasma is located in the eastern portion of the Valles Marineris canyon system on Mars, the largest known canyon system in the Solar System. Deeply incised canyons such as this are excellent targets for studying the Martian crust, as the walls may reveal many distinct types of bedrock.
This section of the canyon was targeted by HiRISE based on a previous spectral detection of hematite-rich deposits in the area. Hematite, a common iron-oxide mineral, was first identified here by the Mars Global Surveyor Thermal Emission Spectrometer (TES). In this TES image, red pixels indicate higher abundances of hematite, while the blue and green pixels represent different types of volcanic rocks (e.g., basalt).
Hematite in the Meridiani Planum region was also detected with the TES instrument (which we can see with the bright red spot on the Global TES mineral map). As a consequence, Meridiani Planum was the first landing site selected on Mars due to the spectral detection of a mineral that may have formed in the presence of liquid water.
Shortly after landing, the Opportunity rover detected the presence of hematite in the form of concretions called "blueberries." The blueberries are found in association with layers of sulfate salt-rich rocks. The salts are hypothesized to have formed through the raising and lowering of the groundwater table. During one such an event, the rock altered to form the hematite-rich blueberries. As the rock was eroded away, the more resistant hematite-rich blueberries were plucked out and concentrated on the plains as a "lag" deposit. Martian blueberries are observed to be scattered across the plains of Meridiani along Opportunity's traverse from Eagle Crater to Endeavor Crater, where Opportunity continues to explore after its mission began over 10 years ago.
This infrared-color image close-up highlights what is possibly the hematite-rich deposits nestled between different types of bedrock terraces in Capri Chasma. The bluish terrace is likely volcanic in origin, possibly basaltic, whereas the greenish rocks remain unidentified.
The central reddish terrace is possibly where some of the hematite may be concentrated. The higher elevation terrace with the lighter-colored materials is likely a sulfate-rich rock (based on CRISM data in the area). Given the presence of both sulfate salts and hematite in this area, akin to the deposits and associations explored by the Opportunity rover in Meridiani Planum, it might be that these materials in Capri Chasma may share a similar origin.
The yellow rectangular box shown on the TES spectral map outlines the corresponding location of the HiRISE image. Although the outline does not appear to contain a high hematite abundance, we note that the lower resolution of TES (about 3 to 6 kilometers per pixel) may exclude smaller exposures and finer sub-pixel details not-yet captured, but could be with HiRISE. A follow-up observation by the CRISM spectrometer may reveal additional details and a spectral signature for hematite in the vicinity at a finer resolution than TES.
The University of Arizona, Tucson, operates HiRISE, which was built by Ball Aerospace & Technologies Corp., Boulder, Colo. NASA's Jet Propulsion Laboratory, a division of Caltech in Pasadena, California, manages the Mars Reconnaissance Orbiter Project for NASA's Science Mission Directorate, Washington.
experimental adventurer augment Transcoded signal from Capri Chasma (Mars) | |
| 5 Likes | 5 Dislikes |
| 80 views views | followers |
| Music | Upload TimePublished on 15 Jan 2017 |
Related keywords
experimental variable,experimental probability,glitch serie,glitch fortnite saison 9,experimental error,glitch effect photoshop,experimental study,glitch gta 5 online,experimental aircraft for sale,idmsa apple,experimental method,experimental aircraft association,imdb,idmar,experimental research,idm download,experimental biology 2020,20170,glitch gta 5 online ps4,2017 oscar,glitch effect after effect,idmss lite,experimental group definition,2017 eurovision,experimental group,experimental music,2017 election,glitch art,glitch gta 5 ps4,2017a,experimental psychology,idml file,2017 dizileri,experimental probability definition,idm superbike,idm 2019,idmss plus,2017 film,idm zkratka,glitch saison 3,2017 signe chinois,glitch effect,glitch paris,idnes ostrava,idm chrome,glitch festival,idnes počasí,idml,glitch gta 5 xbox one,2017 en espagnol,2017 en chiffre romain,glitch gta 5,glitch traduction,glitch adidas,https://www.idnes.cz/,experimental research design,glitch fortnite,idnes,idm music,experimental design,2017 uel road to the final sbc,2017 en anglais,glitch casino gta 5,idmss,experimental frenzy,idmedia,experimental aircraft,experimental webkit features,2017 nba draft,2017 peugeot 3008,idm most,glitch fortnite saison 10,2017 calendrier,2017 musique,2017 année chinoise,2017 roland garros,2017 movies,2017 audi cup scores,glitch pokemon go,
Không có nhận xét nào:
Đăng nhận xét