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Frontier Mountain 93001
Basic information Name: Frontier Mountain 93001
     This is an OFFICIAL meteorite name.
Abbreviation: FRO 93001
Observed fall: No
Year found: 1993
Country: Antarctica [Collected jointly by EUROMET and PNRA]
Mass:help 4.86 g
NHM Catalogue:  5th Edition  (2000)  Lodranite
Meteoritical Bulletin:  MB 89  (2005)  Acapulcoite/Lodranite
MetBase:  v. 7.1  (2006)  Acapulcoite/Lodranite
Recommended:  Acapulcoite/Lodranite    [explanation]

This is 1 of 11 approved meteorites classified as Acapulcoite/Lodranite.   [show all]
Search for other: Acapulcoite-lodranite family, Primitive achondrites
Writeup from MB 89:

Frontier Mountain 93001


Found 1994 January 4

Primitive achondrite (Acapulcoite-Lodranite)

This 4.84 g small stone is a ~16 x 13 x 12 mm, angular, 20% fusion crusted fragment found by a PNRA/EUROMET team. Mineralogy and classification (A. Burroni and L. Folco): FRO 93001 is a medium- to coarse-grained, gabbroic rock consisting of (in order of abundance) orthoenstatite (Fs13.3±0.4 Wo3.1±0.2), oligoclase (Ab80.5±3.3 Or3.2±0.6), augite (Fs6.1±0.7 Wo42.3±0.9) and traces of olivine (Fa13.3±0.3; [Mn/Mg] = 0.006). Corroded xenoliths of probable lodranitic composition float in the gabbroic host lithology; they mainly include granoblastic olivine Fo90.4±0.7 with average grain size of 400 μm, lesser Fe,Ni metal, and minor chromite (Cr/(Cr+Al) = 0.84; Fe/(Fe+Mg) = 0.64), phosphates, schreibersite, and troilite. The rock (including xenoliths) is devoid of shock features (shock stage S1) and nearly unweathered (weathering degree, W1). FRO 93001 is similar to the igneous lithology, that intrudes an acapulcoite host in the Lewis Cliff (LEW) 86220 meteorite described by McCoy et al. (1997). Specimens: main mass, 2.57 g, two thin sections, MNA-SI; one thin section, NHM, type specimen, 1.60 g, OU.

Data from:
  Table 3
  Line 8:
Date:4 Jan 1994
Mass (g):4.84
Classifier:A. Burroni and L. Folco, MNA-SI; magnetic classification, P. Rochette, CEREGE and L. Folco MNA-SI according to Rochette et al. (2003)
   and collections
CEREGE: CEREGE BP 80 Avenue Philibert, Technopole de l'Arbois 13545 Aix-en-Provence Cedex 4 France, France (institutional address; updated 10 Jun 2023)
MNA-SI: Museo Nazionale dell'Antartide, Università di Siena, Via Laterina 8, I-53100 Siena, Italy; Website (institutional address; updated 13 Dec 2011)
NHM: Department of Mineralogy, The Natural History Museum, Cromwell Road, London SW7 5BD, United Kingdom; Website (institutional address; updated 9 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)
Search for this meteorite in the Museo Nazionale dell'Antartide database (Siena, Italy):   
References: Published in Meteoritical Bulletin, no. 89, MAPS 40, A201-A263 (2005)
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     Catalogue of Meteorites:   (72°S, 160°E)
     Recommended::   (72° 57' 20"S, 160° 29' 29"E)
Note: the NHM and MetBase coordinates are 107.9 km apart

     This is 1 of 44248 approved meteorites from Antarctica (plus 3802 unapproved names)
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