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Frontier Mountain 03022
Basic information Name: Frontier Mountain 03022
     This is an OFFICIAL meteorite name.
Abbreviation: FRO 03022
Observed fall: No
Year found: 2003
Country: Antarctica [Collected by Programma Nazionale di Ricerche in Antartide (PNRA), Italy]
Mass:help 2.47 g
Meteoritical Bulletin:  MB 89  (2005)  Ureilite-pmict
MetBase:  v. 7.1  (2006)  Ureilite-pmict
Recommended:  Ureilite-pmict    [explanation]

This is 1 of 31 approved meteorites classified as Ureilite-pmict.   [show all]
Search for other: Achondrites, Ureilites
Writeup from MB 89:

Frontier Mountain 03022


Found 2003 December 29

Achondrite (polymict ureilite)

A stony fragment weighing 2.47 g was found by a PNRA team on the Frontier Mountain blue ice field. Mineralogy and classification (A. M. Fioretti and R. Carampin, Istituto di Geoscienze e Georisorse – CNR, Padova): polymict ureilite breccia containing a wide variety of mineral and lithic clasts <2 mm in size. Typical ureilite clasts show equilibrated texture with triple junctions, intergranular lamellae of graphite, and olivine cores ranging from Fo75 to Fo87 with highly reduced rims (up to Fo93). Most isolated olivine crystals show the same compositional range. Low-Ca pyroxene in lithic clasts and isolated crystals shows a wide compositional range, En67-99 Wo0.2-12. Rare augite is found as isolated crystals. Individual plagioclase crystals are mainly albitic, Ab94.7 Or7.14. Interstitial glass has high SiO2 content (up to 75 wt%).  The breccia contains five very fine-grained dark clasts, up to 1.8 mm in size, similar carbonaceous chondrite matrix material. The clasts are almost opaque and contain both Mg-rich and Fe-rich, very fine-grained hydrous minerals. Opaque mineral include abundant troilite and minor kamacite, schreibersite. Shock varies in the different up to shock stage S5. Weathering is minor, W1. Specimens, main mass MNA-SI.

Data from:
  Table 3
  Line 23:
Date:29 Dec 2003
Mass (g):2.47
Magnetic suscept.:3.98
Classifier:A. M. Fioretti and R. Carampin, Pad
Main mass:MNA-SI
Comments:pbr; thin section, MNA-SI
   and collections
MNA-SI: Museo Nazionale dell'Antartide, Università di Siena, Via Laterina 8, I-53100 Siena, Italy; Website (institutional address; updated 13 Dec 2011)
CNR: Instituto di Geoscienze e Georisorse, Consiglio Nazionale delle Richerche, Sez. Di Padova, Corso Garibaldi 37, 35100 Padova, Italy (institutional address)
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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     Recommended::   (72° 57' 3"S, 160° 27' 36"E)

     This is 1 of 43699 approved meteorites from Antarctica (plus 3802 unapproved names)
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