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Mont Sujet
Basic information Name: Mont Sujet
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2016
Country: Switzerland
Mass:help 66.3 g
Classification
  history:
Meteoritical Bulletin:  MB 106  (2018)  H5
Recommended:  H5    [explanation]

This is 1 of 10945 approved meteorites (plus 20 unapproved names) classified as H5.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 11 Sep 2017
Writeuphelp
Writeup from MB 106:

Mont Sujet        47°7.898’N, 7°8.510’E

Bern, Switzerland

Find: 24 Sept 2016

Classification: Ordinary chondrite (H5)

History: Found at a depth of 10 cm in soil during a search for Twannberg meteorites using a metal detector.

Physical characteristics: Complete, dark brown individual, 41.7 × 31 × 29 mm. On the surface, patches of silty soil characteristic for Mont Sujet are firmly adhering.

Petrography: Typical chondritic texture, unbrecciated. Typical feldspar size is 5-10 μm. Chromite grains up to 0.6 mm. Rare native copper in iron. Weathering is relatively strong in an outermost zone just 0.8 mm thick, most of the meteorite shows low weathering with <10% of iron and troilite oxidized, consistent with weathering grade W1. Mean chondrule size is 0.42±0.17 mm (n=63). Bulk density by immersion in isopropanol is 3.48 g/cm3.

Geochemistry: Olivine Fa18.3±0.3 (range Fa18.7-19.9), n=12; pyroxene: Fs16.6±0.2 Wo1.4±0.2 (range Fs16.3-17.1Wo1.1-1.6), n=13. Two analyses of Ca-rich pyroxene yielded Fs6.4Wo44.7 and Fs6.9Wo45.9.

Classification: This is a H chondrite based on mineral composition and mean chondrule size. Petrographic type 5 based on feldspar size. Shock stage S2. Weathering grade W1.

Specimens: 63.1 g and one polished thin section at NMBE.

Data from:
  MB106
  Table 0
  Line 0:
State/Prov/County:Bern
Origin or pseudonym:Meadow
Date:24 Sept 2016
Latitude:47°7.898'N
Longitude:7°8.510'E
Mass (g):66.272
Pieces:1
Class:H5
Shock stage:S2
Weathering grade:W1
Fayalite (mol%):18.3±0.3 (N=12)
Ferrosilite (mol%):16.6±0.2 (N=13)
Wollastonite (mol%):1.4±0.2 (N=13)
Classifier:B. Hofmann, Th. Burri, NMBE
Type spec mass (g):63.8
Type spec location:NMBE
Main mass:NMBE
Finder:Bruno Meier, Gerolfingen, Switzerland
Comments:Submitted by Beda Hofmann
Institutions
   and collections
NMBE: Natural History Museum Bern Bernastrasse 15 CH-3005 Bern Switzerland, Switzerland; Website (institutional address; updated 2 Mar 2012)
Bern: University of Bern, University of Bern, Hochschulstrasse 4, CH-3012 Bern, Switzerland (institutional address)
Catalogs:
References: Published in Gattacceca J., Bouvier A., Grossman J., Metzler K., and Uehara M. (2019) Meteoritical Bulletin, no. 106. Meteorit. Planet. Sci. 54 in press.
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Geography:

Switzerland
Coordinates:
     Recommended::   (47° 7' 54"N, 7° 8' 31"E)

Statistics:
     This is 1 of 4 approved meteorites from Bern, Switzerland (plus 1 unapproved name)
     This is 1 of 11 approved meteorites from Switzerland (plus 3 unapproved names)
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