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Northwest Africa 1242 (MES-A2)
Country:
State/District: Sahara
Co-ordinates:
Date of find: 1985
Total known weight: 7 kg (approx.)
Number of pieces: 2
Type: Mesosiderite, subgroup A2
Shock Stage: S1
Weathering Stage: W0
Mineral analyses:
Pyroxene Fs33
plagioclase: An92; kamacite: 5.8 wt% Ni; orthopyroxene: Fs33 Wo3
Pairings: not known
Synonyms: "Libya"
Show Description and references (MetBase)

Two fully ablated pieces of a mesosiderite (total known weight ~7kg) were found near the village of Gillio by unknown oil exploration workers and put into service as bookends for 13 years; purchased in 1998 by an anonymous dealer; reports of a strewn field are presently unconfirmed; classification and mineralogy: Type 2A; contains scarce, metal nodules up to 19mm in diameter; Mg-rich pyroxene overgrowths on Ca-pyroxene clasts; moderate resorption of plagioclase; orthopyroxene (Fs33Wo3) replaces pigeonite (Fs34Wo8) and exsolved augite (Fs43Wo42); plagioclase (An92); pyrrhotite, chromite (Al2O3=8.4 wt%); kamacite, 5.8 wt% Ni; rare taenite (42 wt% Ni), silica and phosphate; shock stage S1; weathering grade W0, S.S.Russell et al., Met. Bull. 86, MAPS, 2002, 37 (Suppl.), p.A157. Description; may be paired with As Sarir, K.Mazurek, Meteorite!, 2003, 9(4), p.38.
The meteorite data copied from MetBase 7.0 for Windows.
For information about this software please contact the Author: Joern Koblitz, The MetBase Library of Meteoritics and Planetary Sciences, Benquestrasse 27, D-28209 Bremen, Germany
Phone: +49 421 24 100 24 Fax: +49 421 24 100 99
Specimen ID# 652 (see all 2 specimens for Northwest Africa 1242)
Description: Nice full slice. One side polished.
Size: 7.5 x 5.5 x 0.2 cm
Weight: 38 gr
  
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Dar al Gani 400 (ALUN-A)
Dhofar 081 (ALUN-A)
Northeast Africa 003 (ALUN)
Shisr 162 (ALUN)
Shergottites
Northwest Africa 2975 (ASHE)
Northwest Africa 6234 (ASHE)
Tissint (ASHE)
Acapulcoutes
Angrites
Aubrites
Diogenites
Eucrites
Howardites
Ungrouped
Dhofar 125 (ACAP)
D'Orbigny (ANGR)
Northwest Africa 2999 (ANGR)
Zaklodzie (AUB-AN)
Northwest Africa 6267 (ADIO)
Tatahouine (ADIO)
Dar al Gani 391 (AEUC-P)
Dhofar 007 (AEUC-C)
Millbillillie (AEUC-M)
Northwest Africa 6268 (AEUC-P)
Great Sand Sea 010 (AHOW)
Northwest Africa 6274 (AHOW)
Yurtuk (AHOW)
Divnoe (ACUNGR)
Northwest Africa 3133 (ACUNGR)
Northwest Africa 6058 (ACUNGR)
Carbonaceous
Enstatite
Ordinary chondrites (LL-groupe)
Ordinary chondrites (L-groupe)
Ordinary chondrites (H-groupe)
Dar al Gani 412 (CK5)
Ivuna (CI1)
Kainsaz (CO3.2)
Orgueil (CI1)
Northwest Africa 4844 (EL3)
Chelyabinsk (LL5)
Hope Creek (LL6)
Karatu (LL6)
Mangwendi (LL6)
Northwest Africa 1701 (LL5)
Northwest Africa 3335 (LL3.2)
Siena (LL5)
Alfianello (L6)
Bruderheim (L6)
Elenovka (L5)
Gashua (L6)
Girgenti (L6)
Independence (L6)
Marion (Iowa) (L6)
Mount Tazerzait (L5)
Northwest Africa 4430 (L3.8)
Northwest Africa 4438 (L3.1)
Ozernoe (L6)
Sahara 02500 (L3)
Santa Vitoria do Palmar (L3)
St. Michel (L6)
Tennasilm (L4)
Arbol Solo (H5)
Chergach (H5)
Gao-Guenie (H5)
Itapicuru-Mirim (H5)
Koltsovo (H4)
Macau (H5)
New Orleans (H5)
Tamdakht (H5)
Thuathe (H4/5)
Trenzano (H3/4)
Ulyanovsk (H5)
Vyatka (H4)
Zhovtnevyi (H6)
Mesosiderites
Pallasites
Bondoc (MES-B4)
Northwest Africa 1242 (MES-A2)
Admire (PAL-MG)
Brenham (PAL-AN)
Esquel (PAL-MG)
Fukang (PAL-MG)
Seymchan (PAL-MG)
Springwater (PAL-UNGR)
Alt Bela (IID)
Bagnone (IIIAB)
Braunau (IIA)
Copiapo (IAB-MG)
Elga (IIE)
Gan Gan (IVA)
Laguna Manantiales (IIIAB)
Magura (IAB-MG)
Maslyanino (IAB)
Miles (IIE)
Morasko (IAB-MG)
Nelson County (IIIF)
Northwest Africa 859 (IRUNGR)
Nova Petropolis (IIIA)
Patos de Minas (octahedrite) (IAB)
Santa Clara (IVB)
Santa Rosa (IC)
Seneca Falls (IIIA)
Tres Castillos (IRUNGR)
Tucson (IRUNGR)
Verkhnyi Saltov (IIIAB)
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