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Northwest Africa 2898
Basic information Name: Northwest Africa 2898
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 2898
Observed fall: No
Year found: 2003
Country: (Northwest Africa)
Mass:help 136 g
Meteoritical Bulletin:  MB 90  (2006)  H7
Recommended:  H7    [explanation]

This is 1 of 31 approved meteorites classified as H7.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 21 Sep 2005
Revised 9 Sep 2006: Final classification
Writeup from MB 90:

Northwest Africa 2898

Northwest Africa

Find: 2003

Ordinary chondrite (H7)

History: An anonymous finder recovered a single stone of 136 g within the North African Sahara in 2003.

Petrography: (A. Greshake, MNB) The meteorite has a totally recrystallized texture, with abundant 120° triple junctions of olivine (Fa17.7), low-Ca pyroxene (Fs15.6Wo3.6), and feldspar (An12.3–18.9). No chondrules were observed.

Geochemistry: Oxygen isotopes: (I. Franchi and R. C. Greenwood, OU) δ17O = +2.905, δ18O = +4.4, ∆17O = +0.617 (all ‰).

Classification: Ordinary chondrite (H7); S2, W1/2.

Specimens: A 23 g type specimen and one polished thin section are on deposit at MNB. Stefan Ralew of Germany holds the main mass.

Plots: O isotopes:  
   and collections
MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
OU: Planetary and Space Sciences Department of Physical Sciences The Open University Walton Hall Milton Keynes MK7 6AA United Kingdom, United Kingdom (institutional address; updated 8 Dec 2011)
Ralew: Stefan Ralew, Kunibertstraße 29, 12524 Berlin, Germany; Website (private address)
References: Published in Meteoritical Bulletin, no. 90, MAPS 41, 1383-1418 (2006)
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     This is 1 of 9729 approved meteorites from (Northwest Africa) (plus 1859 unapproved names)

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