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Tissint Martian meteorite, Tata Province, Souss-Massa Region, Morocco

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Latitude & Longitude (WGS84): 29° 28' 55'' North , 7° 36' 39'' West
Latitude & Longitude (decimal): 29.48194,-7.61083
Other regions containing this locality:Northwest Africa Meteorites
Sahara Desert, North Africa
Non-native locality type:Meteorite
Meteorite Class:Shergottite meteorite
Meteoritical Society Class: Martian (shergottite)
Metbull:View entry in Meteoritical Bulletin Database
Origin locality:Mars
Köppen climate type:BWh : Hot deserts climate


Stone, Achondrite, Martian (Shergottite).
Depleted picritic shergottite similar to EETA79001, lithology A.
Witnessed fall 18 July 2011, 2:00 AM. TKW >7kg.

Several locals observed a bright fireball in the Oued Drâa Valley 50 km east-southeast of Tata. Initially no stones were recovered, but after diligent searches by nomads finally in October 2011 several glassy black fusion crusted stones were recovered. Due to the lack of terrestrial weathering we can be fairly certain the stones recovered here are from this fall. Several hundred stones from 0.1 g to over 1 kg have been recovered with estimates of the total recovered weight varying from 7 to 20 kg.

This is the fifth recovered witnessed Martian meteorite fall. It is a olivine-phyric shergottite that is related to and possibly launched paired with SaU 005 (plus parings), NWA 1195, NWA 2046 NWA 2626, NWA 4925, NWA 5789, NWA 6162, DaG 476 (plus parings) and Yamato 980459.
While most of the meteorite fragments were not recovered for two+ months after the fall, the meteorite shows minimal indications of terrestrial weathering.

Because of the fractured maskelynite (~20 vol%)and other delicate features from preterrestrial Martian impacts remain almost entirely intact (Balt et al., 2015). Following a similar line of argument, some isotopic signatures [light carbon (low in C-13) associated with Deuterium-enriched hydrogen (δD up to +1183‰)] of organic carbon in shock-melt veins are difficult to account for in terms of known carbonaceous chondrites and other possible abiotic sources. Thus, Lin et al., (2014) have again raised the possibility of biogenic carbon in a Martian meteorite.


Mineral List


19 valid minerals. 3 (TL) - type locality of valid minerals.

Meteorite/Rock Types Recorded

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References

Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Abderrahmane Ibhi (2012): The Martian Meteorite of Tissint (Tata, Morocco) Preliminary Scientific Study and Reports of the Saharan Nomads. Meteorite, xx-xx.
Aoudjehane, C. H., Jambon A. & Boudouma J. A. (2012). Tissint: The first Martian meteorite fall of the century in Morocco (abstract #5069). Meteoritics & Planetary Science 47. PUBLISHED ONLINE.
H. Chennaoui Aoudjehane et al. (2012): Tissint Martian Meteorite: A Fresh Look at the Interior, Surface, and Atmosphere of Mars. Science DOI: 10.1126/science.1224514 (Published Online October 11 2012).
Baziotis, I. P., Liu, Y., DeCarli, P. S., Melosh, H. J., McSween, H. Y., Bodnar, R. J., & Taylor, L. A. (2013). The Tissint Martian meteorite as evidence for the largest impact excavation. Nature Communications, 4, 1404.
Yangting Lin, Y., El Goresy, A., Hu, S. et al. (2014) NanoSIMS analysis of organic carbon from the Tissint Martian meteorite: Evidence for the past existence of subsurface organic-bearing fluids on Mars: MAPS 49 (12): 2201-2218. (Dec 2014)
Balta, J. B., Sanborn, M. E., Udry, A., Wadhwa, M. & McSween Jr., H. Y. (2015) Petrology and trace element geochemistry of Tissint, the newest shergottite fall: MAPS 50 (1): 63-85. (Jan 2015)
Ma, C., Tschauner, O., Beckett, J.R., Liu, Y., Rossman, G.R., Zhuravlev, K., Prakapenka, V., Dera, P., Taylor, L.A. (2015): Tissintite, (Ca, Na, □)AlSi2O6, a highly-defective, shock-induced, high-pressure clinopyroxene in the Tissint martian meteorite. Earth and Planetary Science Letters, 422, 194-205
Ma, C., Tschauner, O., Beckett, J.R., Liu, Y., Rossman, G.R., Sinogeikin, S.V., Smith, J.S., Taylor, L.A. (2016): Ahrensite, γ-Fe2SiO4, a new shock-metamorphic mineral from the Tissint meteorite: Implications for the Tissint shock event on Mars. Geochimica et Cosmochimica Acta, 184:240-256.

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