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Lomonosov 15001
Basic information Name: Lomonosov 15001
     This is an OFFICIAL meteorite name.
Abbreviation: LOM 15001
Observed fall: No
Year found: 2015
Country: Antarctica [Collected by the Russian Antarctic Expedition]
Mass:help 12.5 g
Recommended:  H3    [explanation]

This is 1 of 632 approved meteorites (plus 2 unapproved names) classified as H3.   [show all]
Search for other: H chondrites, H chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 10 Apr 2021
Writeup from MB 110:

Lomonosov 15001        71°33’0.4"S, 15°30’30.2"E


Find: 2015 Dec 30

Classification: Ordinary chondrite (H3)

History: One fragment of meteorite (12.5 g) was found by Mr. Malagamba S.V. 30 Desember 2015, member of the UrFU meteorite search team of Russian Antarctic Expedition 61 (Kolunin R.N., Korolev A.Yu., Larionov M.Yu., Lazo V.I., Malagamba S.V., Pastukhovich A.Yu. ) near Mnt. Osechka (Lomonosov mountains, Queen Maud Land, Antarctic).

Physical characteristics: Ordinary chondrite with brownish-black fusion crust.

Petrography: M. A. Ivanova, C. A. Lorenz (Vernad). Meteorite consists of chondrules (65%) embedded in fine-grained matrix (35%). Chondrules ~0.35 mm in average size are well delineated and represented by POP, PO, PP, RP, and rare CC and BO textures. The total metal content is ~9 vol% on average. The main minerals are olivine and pyroxene; minor and accessory minerals include: sulfide, chromite and iron hydroxides. The meteorite is H3 ordinary chondrite (estimated subtype 3.6). Sample demonstrates minor features of terrestrial weathering, W1. Extinction of olivine is sharp; only a few grains showing undulatory extinction. Shock veins are not observed in the meteorite. These features correspond to shock stage S2.

Geochemistry: M. A. Ivanova, C. A. Lorenz (Vernad). The chemical composition of olivine in chondrules is variable, from Fa0.77 to Fa28 (mol.%), with average from 29 analyses of Fa15.2±6.1, PMD = 40% (PMD of olivine corresponds to 3.6 petrological type). Zoned olivine grains have a range of compositions from Fa19 in the rim to Fa10 in the core. Pyroxene is represented by orthopyroxene (Fs13.6±7Wo1.3±1.1), pigeonite and augite. The chondrule mesostasis is represented by glass and crystalline glass consisting of a mixture of albitic plagioclase and clinopyroxene. Fe,Ni-metal is represented by kamacite, taenite and tetrataenite. The Co content of kamacite varies in a wide range, and its average value (N=24) is 0.72±0.53 wt.% with PMD = 26.3%.

Classification: M. A. Ivanova, C. A. Lorenz (Vernad). Ordinary chondrite H3, S2, W1

Specimens: 8.5g at UrFU, 4g and 1 thin section at Vernad

Data from:
  Table 0
  Line 0:
Date:2015 Dec 30
Mass (g):12.5
Shock stage:S2
Weathering grade:W1
Fayalite (mol%):15.2±6.1 (N=29)
Ferrosilite (mol%):13.6±7 (N=29)
Wollastonite (mol%):1.3±1.1 (N=29)
Classifier:M. A. Ivanova, C. A. Lorenz (Vernad)
Type spec mass (g):12.5 g
Type spec location:UrFU
Main mass:UrFU
Finder:Malagamba S.V., member of UrFU meteorite search team of Russian Antarctic Expedition 61
Comments:Field name Mal-6; analysts - M. A. Ivanova, C. A. Lorenz (Vernad); submitted by Pastukhovich A.Yu. (UrFU).; submitted by Kseniya Dugushkina (RAS-UB) dugushkina.kseniya@mail.ru
   and collections
Vernad: Vernadsky Institute of Geochemistry and Analytical Chemistry, Russia (institutional address; updated 21 Feb 2016)
UrFU: Ural Federal University, 620002, 19 Mira street, Ekaterinburg, Russia (institutional address; updated 14 Jan 2015)
RAS-UB: Zavaritsky Institute of Geology and Geochemistry Russian Academy of Sciences, Ural Branch 15 Akademika Vonsovskogo str., Ekaterinburg, 620016, Russia (institutional address; updated 19 Apr 2018)
References: Published in Meteoritical Bulletin, no. 110, in preparation (2021)
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     Recommended::   (71° 33' 0"S, 15° 30' 30"E)

     This is 1 of 40753 approved meteorites from Antarctica (plus 4494 unapproved names)
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