Martian Meteorite Tindouf 002, Shergotitte (Mafic, REE - Enriched). LAST ONE
Item History & Price
| Reference Number: Avaluer:4451712 |
TINDOUF 002 Tindouf 002Found SaharaMay 16, 2014Planetary AchondriteMartian Shergotitte (Mafic*, Enriched*)Specimen is a 0.20g sliceCOMBINED SHIPPING : 5$ per package Mafic* : Mafic is an adjective describing a silicate mineral or rock that is rich in magnesium and iron, and hence is a portmanteau of "magnesium" and "ferric". Most mafic minerals are dark in color, and common rock-forming mafic minerals include olivine, pyroxene, amphibole, and biotite. Co...mmon mafic rocks include basalt, dolerite and gabbro.Enriched* : A remarkable observation about all the known shergottites is that their trace element characteristics define just three different groups, termed "depleted", "intermediate" and enriched. For the group of 15 rare earth elements (or "REE", the lathane element family, atomic number 57 to 71) the abundances relative to those of chondrites are quite distinct in their patterns. Tindouf 002Basic informationName: Tindouf 002
This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2014
Country: Algeria
Mass: 78.2 g
Classification
history:Recommended: Martian (shergottite)
Comments:Approved 31 Mar 2016WriteupWriteup from MB 105:
Tindouf 002 27.312°N, 7.561°WTindouf, AlgeriaFind: 2014 May 16Classification: Martian meteorite (Shergottite)History: Six similar dark stones were found together by Mr. Alla on May 16, 2014, at a location 80 km SE of Tindouf, Algeria (27.312°N, 7.561°W) and subsequently acquired by Moulay El Bechir Didi. Four of the stones were subsequently purchased in June 2015 by Fabien Kuntz.Physical characteristics: The stones lack fusion crust and are dark green in color with visible black, vesicular patches.Petrography: (A. Irving and S. Kuehner, UWS) Intersertal texture with some preferred orientation of elongate grains. Major minerals are zoned clinopyroxene and intermediate plagioclase (converted to maskelynite) with accessory ulvöspinel, ilmenite, merrillite, fayalite, pyrrhotite and silica polymorph. Dark glassy, vesicular shock pockets are present.Geochemistry: High-Ca pyroxene (subcalcic augite, Fs22.8-61.8Wo31.1-20.2, FeO/MnO = 28-38, N = 6), low-Ca pyroxene (pigeonite, Fs43.0-62.5Wo14.6-15.1, FeO/MnO = 30-39, N = 3), maskelynite (An46.3-53.1Or3.7-1.2, N = 3). Hf and Nd isotopes (M. Righter and T. Lapen, UHou): analysis of a subsample gave e176Hf = -19.7 and e143Nd = -10.0, indicating that this specimen has affinities to enriched shergottites (like Shergotty).Classification: Martian (mafic shergottite, enriched).Specimens: 15.84 g including one polished endcut at UWB; remaining material with Kuntz and an anonymous collector.Data from:
MB105
Table 0
Line 0:State/Prov/County:TindoufDate:2014 May 16Latitude:27.312°NLongitude:7.561°WMass (g):78.2Pieces:6Class:Martian (shergottite)Shock stage:highWeathering grade:lowFerrosilite (mol%25):43.0-62.5; 22.8-61.8Wollastonite (mol%25):14.6-15.1; 31.1-20.2Classifier:A. Irving and S. Kuehner, UWSType spec mass (g):15.84Type spec location:UWBMain mass:F. KuntzComments:A01; submitted by A. IrvingInstitutions
and collectionsUWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
UHou: University of Houston, United States (institutional address; updated 27 Oct 2011)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
Kuntz: Fabien Kuntz, France; Website (private address)
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