Meteorite NWA 8785 - Rare EL3 Enstatite Chondrite




Item History & Price

Information:
Reference Number: Avaluer:4933316
Original Description:

 NWA 8785  NWA 8785Found Sahara, 2014Enstatite chondriteEL3Specimen is a 0.21g slice COMBINED SHIPPING : 5$ per package One of the only 5 classified EL3 outside Antarctica !!!(NWA 3132, 6508, 7406, 8785 and Watson 007)  Northwest Africa 8785Basic informationName: Northwest Africa 8785
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8785
Observed fall: No
Year found: 2014
Country: (Northwest Africa) ...R>Mass: 63.5 g
Classification
  history:Recommended:  EL3  This is 1 of 21 approved meteorites classified as EL3.   [show all]Comments:Approved 19 Apr 2016WriteupWriteup from MB 105:
Northwest Africa 8785 (NWA 8785)(Northwest Africa)Purchased: 2014 JanClassification: Enstatite chondrite (EL3)History: Purchased by Fabien Kuntz in January 2014 from a dealer in Rissani, Morocco.Petrography: (A. Irving and S. Kuehner, UWS) Well-formed, spherical chondrules are set in a dark, deep red-brown matrix (~40 vol.%25). Minerals are orthopyroxene, forsterite, silica polymorph (with enstatite in chondrules), kamacite, troilite (some Cr-bearing), Al-Ti-bearing diopside, schreibersite and minor calcite and gypsum (probably representing altered oldhamite). No CAI were found.Geochemistry: Olivine (Fa0.2-1.0, Cr2O3 = 0.01-0.28 wt.%25, mean 0.15±0.09 wt.%25, N = 18), orthopyroxene (Fs0.1-14.9Wo0.1-2.6, N = 17), diopside (Fs0.4-0.5Wo42.9-42.1, Al2O3 6.9-7.5 wt.%25, TiO2 1.2-1.0 wt.%25, N = 2), metal (Si 0.7 wt.%25, Ni 7.1 wt.%25, Co 0.5 wt.%25, N = 2). Oxygen isotopes (K. Ziegler, UNM): analyses of four acid-washed subsamples by laser fluorination gave, respectively, d17O 3.180, 2.880, 2.996, 2.922; d18O 6.042, 5.707, 5.820, 5.849; ?17O -0.010, -0.133, -0.077, -0.166 (all per mil).Classification: Enstatite chondrite (EL3). Matrix is unusually abundant for an enstatite chondrite.Specimens: 12.86 g including one polished thin section at PSF; main mass with Kuntz.Data from:
  MB105
  Table 0
  Line 0:Place of purchase:RissaniDate:P 2014 JanMass (g):63.5Pieces:1Class:EL3Shock stage:S2Weathering grade:lowFayalite (mol%25):0.2-1.0 (N = 18)Ferrosilite (mol%25):0.1-14.9 (N = 17)Wollastonite (mol%25):0.1-2.5Classifier:A. Irving and S. Kuehner, UWSType spec mass (g):12.86Type spec location:PSFMain mass:F. KuntzComments:K220; submitted by P. SipieraPlots:O isotopes:   Institutions
   and collectionsPSF: Planetary Studies Foundation, 10 Winterwood Lane, Unit B, Galena, Illinois 61036-9283, United States; Website (institutional address; updated 1 Dec 2011)
UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
Kuntz: Fabien Kuntz, France; Website (private address)

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