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Pavonis Mons

Coordinates:1°29′N247°02′E/ 1.48°N 247.04°E/1.48; 247.04
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Pavonis Mons
THEMISdaytime IR mosaic of Pavonis Mons. A large fan-shaped expanse of knobby deposits (the Pavonis Sulci) believed left by past glaciation extends northwestward from the mountain.
Feature typeShield volcano
Coordinates1°29′N247°02′E/ 1.48°N 247.04°E/1.48; 247.04[1]
Peak8.7 km (5.4 mi) 28,543 ft (8,700 m)
DiscovererMariner 9(1971)
EponymLatin -Mount Peacock

Pavonis Mons/pəˈvoʊnɪsˈmɒnz/[2](Latinfor "peacockmountain ") is a largeshield volcanolocated in theTharsisregion of the planetMars.It is the middle member of a chain of three volcanic mountains (collectively known as theTharsis Montes) that straddle the Martian equator between longitudes 235°E and 259°E. The volcano was discovered by theMariner 9spacecraft in 1971, and was originally called Middle Spot.[3]Its name formally became Pavonis Mons in 1973.[4]The equatorial location of its peak and its height make it the ideal terminus for aspace elevator,[5][6]and it has often been proposed as a space elevator location, especially in science fiction. It is also an ideal location for aSky Ramp.

General description

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Map ofTharsis quadrangle.Pavonis Mons is located at the southern edge.

Pavonis Mons stands at the southern edge of theTharsis quadrangle- approximately 400 km southwest ofAscraeus Mons(the northernmost of the Tharsis Montes) and 400 km northeast ofArsia Mons(the southernmost member of the chain). The Tharsis Montes volcanoes lie along the crest of a northeast-trending rise (Tharsis bulge) that extends more than 3,000 km across the western equatorial region of Mars.[7]Olympus Mons,the tallest volcano in theSolar Systemlies at the edge of the Tharsis bulge, about 1,200 km northwest of Pavonis Mons.

Pavonis Mons is the smallest of the Tharsis Montes volcanoes, measuring about 375 km across[4]and standing 14 km above Mars' mean surface level. As ashield volcano,Pavonis Mons has an extremely low profile with flank slopes that average only 4°.[8]The summit contains a deep, circularcalderathat is 47 km in diameter and almost 5 km deep.[9]A larger, shallower depression lies immediately northeast of the smaller caldera. The large depression is about 90 km in diameter and structurally more complex than the small caldera.[10]

Like most of the Tharsis region, Pavonis Mons has a highalbedo(reflectivity) and lowthermal inertia,indicating that the volcano and surrounding areas are covered with large amounts of fine dust (seeMartian surface). The dust forms a mantle over the surface that obscures or mutes much of the fine-scale topography and geology of the region.[11]Tharsis is probably dusty because of its high elevations. The summit experiences an atmospheric pressure of around 130Pa(1.3 mbar),[12]about 21% of Mars' mean surface pressure. The atmospheric density is too low to mobilize and remove dust once it is deposited.[13]

Geology

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MOLA colorized topography of Pavonis Mons

The bulk of the volcano's surface consists of lava flows of the earlyAmazonian age.The northern flanks of the volcano are highly faulted with grabens and normal faults concentric to the volcano's summit caldera.[7]To its lower east flank, there is a chain of elliptical, or oval-shaped, pits, lined up down the center of a shallow trough. These features were formed by faulting and associated collapse; the scarp on each side of the trough is a fault line.

Glaciers

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UsingMGSandOdysseydata, combined with developments in the study of glaciers, scientists suggest that glaciers once existed on Pavonis Mons and probably still do to some extent.[14][15]Evidence for this includes concentric ridges (moraines "dropped" by glaciers), a knobby area (caused by ice sublimating), and a smooth section that flows over other deposits (debris-covered glacial ice). The ice could have been deposited when the tilt of Mars changed the climate, thereby causing more moisture to be present in the atmosphere. Studies suggest the glaciation happened in the Late Amazonian period, the most recent period in Mars chronology. Multiple stages of glaciation probably occurred.[16]The ice present today represents one more resource for possible future colonization of the planet.

Possible evidence of plate tectonics

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Pavonis Mons is the middle of three volcanos (collectively known as Tharsis Montes) on the Tharsis bulge near the equator of the planet Mars. The other Tharsis volcanoes are Ascraeus Mons and Arsia Mons. The three Tharsis Montes, together with some smaller volcanoes to the north, form a fairly straight line. It has been proposed that this straight line of volcanoes is the result of the sort of plate motion which on Earth makeschains of "hot spot" volcanoes.[17][18][19][20][21]

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  • Pavonis Mons provides the putative setting for the song "Approaching Pavonis Mons by Balloon (Utopia Planitia)" byThe Flaming Lips,released as part of the albumYoshimi Battles the Pink Robots.
  • InKim Stanley Robinson'sMars Trilogy,Mars'sspace elevatorhas its base on the southern rim of Pavonis – the highest place on the equator – and the city of Sheffield is built around it.
  • Pavonis Mons is also the base of Mars'sspace elevatorin theGURPSTranshuman Spaceroleplaying game setting. The city of New Shanghai, the largest on Mars, is built around the elevator.Deimosis used as the anchor, having been shifted from its current orbit.[22]Pavonis Mons also hosts a space elevator in other GURPS settings, includingGURPS Mars.
  • Pavonis Mons hosts a space elevator to Deimos in theBuck Rogers in the 25th Centuryfranchise.[22]
  • Pavonis Mons is the name of a Settlement Defense Front destroyer in the game Call of Duty: Infinite Warfare in the mission "Operation Deep Execute", Captain Khosi Siyada was the ship's commander.
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  • Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) wide angle color composite image
    Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) wide angle color composite image
  • Mars Global Surveyor MOC image showing mantle of dust near summit of Pavonis Mons. The dust makes the image look blurry.
    Mars Global SurveyorMOCimage showing mantle of dust near summit of Pavonis Mons. The dust makes the image look blurry.
  • THEMIS image of channels and pits on southern flank of Pavonis Mons.
    THEMISimage of channels and pits on southern flank of Pavonis Mons.
  • A cinder cone on southern flank of Pavonis Mons.
    Acinder coneon southern flank of Pavonis Mons.
  • The summit caldera of Pavonis Mons
    The summitcalderaof Pavonis Mons
  • HiRISE image (color) of a 35 m wide lava tube skylight surrounded by a collapse pit on Pavonis Mons
    HiRISEimage (color) of a 35 m widelava tubeskylight surrounded by a collapse pit on Pavonis Mons
  • HiRISE image of a 35 m wide lava tube skylight surrounded by a collapse pit on Pavonis Mons
    HiRISEimage of a 35 m widelava tubeskylight surrounded by a collapse pit on Pavonis Mons
  • HiRISE image of a 180 m wide lava tube skylight on the volcano's southeast flank
    HiRISE image of a 180 m wide lava tube skylight on the volcano's southeast flank

See also

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References

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  1. ^"Pavonis Mons".Gazetteer of Planetary Nomenclature.USGS Astrogeology Research Program.
  2. ^"Pavo".Dictionary Unabridged(Online). n.d.
    "Mons".Dictionary Unabridged(Online). n.d.
  3. ^Carr, Michael H. (1973). "Volcanism on Mars".Journal of Geophysical Research.78(20): 4049–4062.Bibcode:1973JGR....78.4049C.doi:10.1029/JB078i020p04049.
  4. ^ab"Gazetteer of Planetary Nomenclature".planetarynames.wr.usgs.gov.
  5. ^Genta, Giancarlo (2017).Next Stop Mars.Switzerland: Springer.doi:10.1007/978-3-319-44311-9.ISBN978-3-319-44311-9.
  6. ^Morton, Oliver (October 4, 2002).Mapping Mars.Picador. p. 296.ISBN9780312707934.
  7. ^abScott, D.H.; Dohm, J.M.; Zimbleman, J.R. (1998). Geologic Maps of Pavonis Mons, Mars. USGS, I-2561.
  8. ^Plescia, J. B. (2004)."Morphometric Properties of Martian Volcanoes".Journal of Geophysical Research.109:E03003.Bibcode:2004JGRE..109.3003P.doi:10.1029/2002JE002031.Table 1.
  9. ^Carr, Michael H. (2006).The Surface of Mars.Cambridge University Press.p.49.ISBN978-0-521-87201-0.
  10. ^Mouginis-Mark, P.J.; Harris, A.J.L.; Rowland, S.K. (2007). Terrestrial Analogs to the Calderas of the Tharsis Volcanoes on Mars inThe Geology of Mars: Evidence from Earth-based Analogs,M. Chapman, Ed.; Cambridge University Press: Cambridge, UK, p. 76.
  11. ^Zimbleman, J.R. (1985)."Surface Properties of Ascraeus Mons: Dust Deposits on a Tharsis Volcano"(PDF).Lunar and Planetary Science.XVI:934–935.Bibcode:1985LPI....16..934Z.
  12. ^Martian Weather ObservationArchived2007-03-11 at theWayback MachineNASA MGS data 0.7 degrees N 245.9 degrees E 13368 meters
  13. ^ Hartmann, W.K. (2003-01-01).A Traveller's Guide to Mars: The Mysterious Landscapes of the Red Planet.New York: Workman. p.59.ISBN978-0-7611-2606-5.
  14. ^Shean, David E. (2005)."Origin and Evolution of Cold-Based Tropical Mountain Glacier on Mars: the Pavonis Mons Fan-Shaped Deposit".Journal of Geophysical Research.110(E5): E05001.Bibcode:2005JGRE..110.5001S.doi:10.1029/2004JE002360.
  15. ^Michael H. Carr (2006).The surface of Mars.Cambridge University Press.ISBN978-0-521-87201-0.Retrieved21 March2011.
  16. ^Shean, David E.; Head, James W.; Marchant, David R. (2005)."Origin and evolution of a cold-based tropical mountain glacier on Mars: The Pavonis Mons fan-shaped deposit"(PDF).Journal of Geophysical Research.110(E5): E05001.Bibcode:2005JGRE..110.5001S.doi:10.1029/2004JE002360.
  17. ^Bell, Jim (2008-06-05).The Martian Surface: Composition, Mineralogy and Physical Properties.Cambridge University Press.ISBN978-0-521-86698-9.
  18. ^ Sleep, Norman H. (1994). "Martian plate tectonics".Journal of Geophysical Research.99(E3): 5639–5655.Bibcode:1994JGR....99.5639S.CiteSeerX10.1.1.452.2751.doi:10.1029/94JE00216.
  19. ^Barlow, Nadine (2008-01-10).Mars: An Introduction to its Interior, Surface and Atmosphere.Cambridge University Press.ISBN978-0-521-85226-5.
  20. ^dsc.discoveryArchived2011-06-03 at theWayback Machine
  21. ^ Connerney, J. E. P. (2005)."Tectonic implications of Mars crustal magnetism".Proceedings of the National Academy of Sciences.102(42): 14970–14975.Bibcode:2005PNAS..10214970C.doi:10.1073/pnas.0507469102.PMC1250232.PMID16217034.
  22. ^abNygren, Ezekial (February 28, 2015).Hypothetical Spacecraft and Interstellar Travel.Lulu.ISBN9781312955929.
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