Auki (Martian crater)

Auki is an impact crater in the Mare Tyrrhenum quadrangle of Mars, at 15.76 °S latitude and 263.13 °W longitude. It is 40.0 km in diameter and was named after Auki, a town in the Solomon Islands, and the name was approved in 2015 by the International Astronomical Union (IAU) Working Group for Planetary System Nomenclature (WGPSN).[1][2][3]

Strong evidence for hydrothermalism was reported by a team of researchers studying Auki. This crater contains ridges that may have been produced after fractures formed with an impact. Using instruments on the Mars Reconnaissance Orbiter they found the minerals smectite, silica, zeolite, serpentine, carbonate, and chorite that are common in impact-induced hydrothermal systems on Earth.[4][5][6][7][8][9] Other evidence of post-impact hydrothermal systems on Mars from other scientists who studied other Martian craters.[10][11][12]

See also

References

  1. ↑ http://planetarynames.wr.usgs.gov
  2. ↑ http://planetarynames.wr.usgs.gov/SearchResults?target=MARS&featureType=Crater,%20craters
  3. ↑ http://www.google.com/mars/
  4. ↑ Carrozzo, F. et al. 2017. Geology and mineralogy of the Auki Crater, Tyrrhena Terra, Mars: A possible post impact-induced hydrothermal system. 281: 228-239
  5. ↑ Loizeau, D. et al. 2012. Characterization of hydrated silicate-bearing outcrops in tyrrhena Terra, Mars: implications to the alteration history of Mars. Icarus: 219, 476-497.
  6. ↑ Naumov, M. 2005. Principal features of impact-generated hydrothermal circulation systems: mineralogical and geochemical evidence. Geofluids: 5, 165-184.
  7. ↑ Ehlmann, B., et al. 2011. Evidence for low-grade metamorphism, hydrothermal alteration, and diagenesis on Mars from phyllosilicate mineral assemblages. Clays Clay Miner: 59, 359-377.
  8. ↑ Osinski, G. et al. 2013. Impact-generated hydrothermal systems on Earth and Mars. Icarus: 224, 347-363.
  9. ↑ Schwenzer, S., D. Kring. 2013. Alteration minerals in impact-generated hydrothermal systems – Exploring host rock variability. Icarus: 226, 487-496.
  10. ↑ Marzo, G., et al. 2010 Evidence for hesperian impact-induced hydrothermalism on Mars. Icarus: 667-683.
  11. ↑ Mangold, N., et al. 2012 Hydrothermal alteration in a late hesperian impact crater on Mars. 43th Lunar and Planetary Science. #1209.
  12. ↑ Tornabene, L., et al. 2009. Parautochthonous megabreccias and possible evidence of impact-induced hydrothermal alteration in holden crater, Mars. 40th LPSC. #1766.
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