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Tichiya
Basic information Name: Tichiya
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2016
Country: Western Sahara
Mass:help 9.35 kg
Classification
  history:
Meteoritical Bulletin:  MB 106  (2018)  Lunar (feldsp. breccia)
Recommended:  Lunar (feldsp. breccia)    [explanation]

This is 1 of 315 approved meteorites classified as Lunar (feldsp. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 11 May 2017
Writeuphelp
Writeup from MB 106:

Tichiya        24.244°N, 13.308°W

(Northwest Africa)

Purchased: 2016 Sep

Classification: Lunar meteorite (feldspathic breccia)

History: Two similar stones were found about 90 m apart at a location called Tayertand subsequently purchased by DPitt in September 2016 from a dealer in Ouarzazate, Morocco.

Physical characteristics: Two identical dark stones (total weight 9354 g) lacking fusion crust, but with a shiny exterior patina. The fresh interior is very dark and mostly fine grained, but some larger, diffuse beige-colored clasts are visible.

Petrography: (A. Irving and S. Kuehner, UWS) Breccia composed predominantly of mineral clasts of anorthite, olivine, exsolved pigeonite, ilmenite, chromite, Cr-ulvöspinel, silica polymorph, troilite, baddeleyite and kamacite, plus some basalt clasts and glass fragments, in a finer grained matrix.

Geochemistry: Olivine (Fa4.6-56.0, FeO/MnO = 81-93, N = 4), orthopyroxene (Fs39.2Wo1.9, FeO/MnO = 59), pigeonite (Fs23.0Wo9.2, FeO/MnO = 43; Fs41.1Wo15.2, FeO/MnO = 55), subcalcic augite (Fs23.2-32.9Wo33.2-33.9, FeO/MnO = 43-47, N = 2), plagioclase (An94.8-95.9Or0.4-0.6; An58.4Or2.0; N = 3).

Classification: Lunar (feldspathic breccia).

Specimens: 20.4 g including one polished thin section at UWB; remainder with DPitt.

Data from:
  MB106
  Table 0
  Line 0:
State/Prov/County:Rio de Oro
Place of purchase:Ouarzazate
Date:P 2016 Sep
Latitude:24.244°N
Longitude:13.308°W
Mass (g):9354
Pieces:2
Class:Lunar (feldsp. breccia)
Shock stage:low
Weathering grade:low
Fayalite (mol%):4.6-56.0
Ferrosilite (mol%):39.2; 23.0; 41.1; 23.2-32.9
Wollastonite (mol%):1.9; 9.2; 15.2; 33.2-33.9
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20.4
Type spec location:UWB
Main mass:D. Pitt
Comments:MVCH 115; submitted by A. Irving
Institutions
   and collections		 UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
DPitt: Darryl Pitt, 225 West 83rd Street, New York, NY 10024, United States; Website (private address)
Catalogs:
References: Published in Gattacceca J., Bouvier A., Grossman J., Metzler K., and Uehara M. (2019) Meteoritical Bulletin, no. 106. Meteorit. Planet. Sci. 54 in press.
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Geography:

Western Sahara
Coordinates:
     Recommended::   (24° 14' 38"N, 13° 18' 29"W)

Statistics:
     This is 1 of 47 approved meteorites from Rio de Oro, Western Sahara
     This is 1 of 265 approved meteorites from Western Sahara (plus 20 unapproved names)
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Synonymshelp: Tichiya 001 (First meteorite in DCA)

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