Meteoritical Bulletin: Entry for Northwest Africa 2898

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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: 136 g

Classification
history:

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

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 (Fa_17.7), low-Ca pyroxene (Fs_15.6Wo_3.6), and feldspar (An_12.3–18.9). 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:

Institutions
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)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 90, MAPS 41, 1383-1418 (2006)

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names)

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