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Famenin
Basic information Name: Famenin
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: Yes, confirmed fall
Year fell: 2015
Country: Iran
Mass:help 630 g
Classification
  history:
Meteoritical Bulletin:  MB 104  (2015)  H/L3
Recommended:  H/L3    [explanation]

This is 1 of 9 approved meteorites classified as H/L3.   [show all]
Search for other: H chondrites, H chondrites (type 3), H/L chondrites, H/L chondrites (type 3), L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 23 Nov 2015
Writeuphelp
Writeup from MB 104:

Famenin        35°7.12’N, 48°58.50’E

Hamadan, Iran

Confirmed fall: 2015 June 27

Classification: Ordinary chondrite (H/L3)

History: Around 08:30 am local time (GMT+3.5) on 27 June 2015, Reza Salimi, living in Famenin town of Hamedan Province, Iran, heard the sound of an impacting object onto the roof of his house. He discovered that part of the roof was damaged and fragments of a stone were spread on the roof. He found some other fragments in his yard. News of the meteorite fall propagated quickly via the local media. With the help of a local journalist, Hamed Pourkhorsandi (CEREGE) received a total of 25 g of fragments two weeks after the fall. Gamma spectroscopy of the two larger fragments were carried out from 16 to 24 July 2015 in LSCE, France. The data show the presence of 7Be, 54Mn, 22Na and 26Al. The presence of these short-lived nuclides, and the detailed reports in the media support with a recent fall event.

Physical characteristics: Upon its impact to the roof, the meteorite broke into two large and eight smaller fragments. The meteorite is covered by fusion crust. The interior is light gray and chondrules are visible with the naked eye.

Petrography: Petrographic observations, performed by optical microscopy and SEM, show different types of chondrules set in a clastic matrix. Chondrule average apparent diameter is 615±380 μm (N=32). Some chondrules exhibit well-preserved troilite rims. Olivine and low-Ca orthopyroxene are not completely equilibrated. Type I chondrules containing metal grains are present. Sub-spherical Fe-Ni metal grains are present in the matrix and show intergrowths with troilite. Troilite is finely polycrystalline with domains of about 10 μm. No melt veins nor shock darkening are visible.

Geochemistry: Olivine Fa17.4±3.7 (Fa6.4-24.9, PMD 14%, N=23), low-Ca pyroxene Fs17.1±9.0Wo1.8±1.5 (Fs5.4-31.0, PMD 41%, N=7) . Cr2O3 content of olivine is 0.12±0.16 wt%. Magnetic susceptibility (measured on 25 g) log χ (× 10-9 m3/kg) = 5.08. Saturation magnetization is 26.0 Am2/kg, indicating a bulk metal content similar to L chondrites (see Gattacceca et al. 2014).

Classification: H/L3. Olivine composition is in the range of H chondrites. However magnetic susceptibily is intermediate between H (log χ (× 10-9 m3/kg) = 5.32±0.10, N=145 falls) and L chondrites (log χ (× 10-9 m3/kg) = 4.87±0.10, N=144 falls in Rochette et al. 2003). The bulk metal content determined by hysteresis measurements is in the L range. Chondrule size is closer to the range for L chondrites than for H chondrites. Based on this, Famenin is classified in the intermediate category H/L (as defined in Kallemeyn et al. 1989). The petrographic subtype (3.8/3.9) is based on petrographic observations and the scatter of olivine composition.

Specimens: 24 g and a polished section at CEREGE.

Bibliography:
  • Gattacceca J., Suavet C., Rochette P., Weiss B.P., Winklhofer M., Uehara M. Friedrich J.M. (2014) Metal phases in ordinary chondrites: magnetic hysteresis properties and implications for thermal history. Meteorit. Planet. Sci. 49 652-676/ (link)
  • Kallemeyn G.W., Rubin A.E., Wang D., and Wasson J.T. (1989) Ordinary chondrites: Bulk compositions, classification, lithophile-element fractionations and composition-petrographic type relationships. Geochim. Cosmochim. Acta 53, 2747-2767. (link)
  • Rochette P., Sagnotti L., Bourot-Denise M., Consolmagno G., Folco L., Gattacceca J., Osete M.L., and Pesonen L. (2003) Magnetic classification of stony meteorites: 1. Ordinary chondrites. Meteorit. Planet. Sci. 38 251-268. (link)
Data from:
  MB104
  Table 0
  Line 0:
State/Prov/County:Hamadan
Origin or pseudonym:Rooftop on Moallem street
Date:2015 June 27
Latitude:35°7.12'N
Longitude:48°58.50'E
Mass (g):630
Pieces:1
Class:H/L3
Weathering grade:W0
Fayalite (mol%):17.4±3.7 (PMD 14%, N=23)
Ferrosilite (mol%):17.1±9.0 (PMD 41%, N=7)
Wollastonite (mol%):1.8±1.5
Magnetic suscept.:5.09
Classifier:H. Pourkhorsandi, P. Rochette, J. Gattacceca, B. Devouard, CEREGE
Type spec mass (g):24
Type spec location:CEREGE
Main mass:Anonymous
Finder:Reza Salimi
Comments:Submitted by Hamed Pourkhorsandi
Institutions
   and collections
CEREGE: CEREGE BP 80 Avenue Philibert, Europole de l'Arbois 13545 Aix-en-Provence Cedex 4 France, France (institutional address; updated 5 Apr 2018)
Catalogs:
References: Published in Meteoritical Bulletin, no. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full
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Geography:

Iran
Coordinates:
     Recommended::   (35° 7' 7"N, 48° 58' 30"E)

Statistics:
     This is the only approved meteorite from Hamadan, Iran
     This is 1 of 250 approved meteorites from Iran (plus 1 unapproved name)
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