Elysium Mons /ɪˈlɪziəm ˈmɒnz/ is a volcano on Mars located in the volcanic province Elysium, at 25°01′N 147°13′E / 25.02°N 147.21°E, in the Martian eastern hemisphere. It stands about 12.6 km (41,000 ft) above its base,[2] and about 14.1 km (46,000 ft) above the Martian datum,[2] making it the third tallest Martian mountain in terms of relief and the fourth highest in elevation. Its diameter is about 240 km (150 mi), with a summit caldera about 14 km (8.7 mi) across. It is flanked by the smaller volcanoes Hecates Tholus to the northeast, and Albor Tholus to the southeast.
![]() 2001 Mars Odyssey THEMIS daytime infrared image mosaic | |
Feature type | Shield volcano |
---|---|
Coordinates | 25°01′N 147°13′E / 25.02°N 147.21°E[1] |
Peak |
|
Discoverer | Mariner 9 |
Discovery
editElysium Mons was discovered in 1972 in images returned by the Mariner 9 orbiter.
Terrestrial analog
editThe terrestrial volcano Emi Koussi (in Chad) has been studied as an analog of Elysium Mons. The two shield volcanoes have summit calderas of similar size, but Elysium Mons is 3.5 times larger in diameter and 6 times higher than its counterpart on Earth.
Possible source of nakhlites
editA 6.5 km diameter crater at 29.674 N, 130.799 E, in the volcanic plains to the northwest of Elysium Mons has been identified as a possible source for the nakhlite meteorites, a family of similar basaltic Martian meteorites with cosmogenic ages of about 10.7 Ma, suggesting ejection from Mars by a single impact event. The dates of the igneous rocks of the nakhlites range from 1416 ± 7 Ma to 1322 ± 10 Ma. These dates plus the crater dimensions suggest a growth rate of the source volcano during that interval of 0.4–0.7 m per Ma, far slower than would be expected for a terrestrial volcano. This implies that Martian volcanism had slowed greatly by that point in history.[3]
Gallery
edit-
Viking Orbiter 1 mosaic (1977)
-
Topography of the Elysium Mons area, from MOLA
-
Mars Global Surveyor view of the summit area
-
Rim of Elysium Mons caldera, as seen by HiRISE
Interactive Mars map
edit
See also
editReferences
edit- ^ "Elysium Mons". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
- ^ a b Plescia, J. B. (2004). "Morphometric properties of Martian volcanoes". Journal of Geophysical Research. 109 (E3): E03003. Bibcode:2004JGRE..109.3003P. doi:10.1029/2002JE002031. ISSN 0148-0227.
- ^ Cohen, B. E.; Mark, D. F.; Cassata, W. S.; Lee, M. R.; Tomkinson, T.; Smith, C. L. (2017). "Taking the pulse of Mars via dating of a plume-fed volcano". Nature Communications. 8 (1): 640. Bibcode:2017NatCo...8..640C. doi:10.1038/s41467-017-00513-8. PMC 5626741. PMID 28974682.
External links
edit- Google Mars - zoomable map centered on Elysium Mons
- "Elysium Mons Volcano" - NASA images of Elysium Mons, from Malin Space Science Systems
This article about an extraterrestrial geological feature is a stub. You can help Wikipedia by expanding it.