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Moshampa
Basic information Name: Moshampa
     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 2.26 kg
Classification
  history:
Meteoritical Bulletin:  MB 105  (2016)  LL5
Recommended:  LL5    [explanation]

This is 1 of 3087 approved meteorites classified as LL5.   [show all]
Search for other: LL chondrites, LL chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 24 Jan 2016
Writeuphelp
Writeup from MB 105:

Moshampa        36° 57' 57"N,  47° 41' 28"E

Zanjan, Iran

Confirmed fall: 2015

Classification: Ordinary chondrite (LL5)

History: On Thursday, 2015 July 30, between 20:10 and 20:15 local time (+04:30 GMT), a very bright fireball appeared in the evening sky of N and NW Iran. Thousands of observational reports in the north to north-west of the country spread immediately in the local and international media. Very loud sonic booms were heard in Zanjan province. Ghadir Mohammadi, a farmer from Moshampa village was working in a field near the Moshampa village, close to the Qezel Ozan river when heard four loud booms (the last one the being much louder) and saw a zig-zag shaped cloud in the sky. He heard the sound of an object falling into the wet soil about 5-10 m away from him. Worried it might be unexploded military ordnance, he went back to the village. He then heard about the fireball reports and realized that the army and police were looking for the object. The day after, he went back to the fall place and found a 1554 g stone buried about 20 cm deep in a hole and informed the media about his finding. Hamed Pourkhorsandi received two pieces of the meteorite at CEREGE on 2015 October 7. Ten additional fragments, with a total weight of ~700 g, were found two weeks later by Shahram Mohammadi near the location of the main mass.

Physical characteristics: The meteorite is roughly pyramidal with an approximate size 15 × 10 × 7 cm. It is entirely covered by fusion crust except for a broken area that shows a light-gray interior. Regmaglypts, melt droplets and polygonal cracks can be seen on the surface of the fusion crust. The broken surface shows chondrules up to 2.5 mm. A 5 mm, white colored, fined-grained clast is visible.

Petrography: Optical microscopy shows a fractured texture (breccia) with different types of chondrules set in a clastic matrix. Some shock-darkened clasts can be seen with the unaided eye. Olivine shows undulatory extinction and planar fractures. An elongated, 40 μm copper grain at the interface of troilite and metal was observed. Among the different clasts, a 1 mm type 6 clast with plagioclase grains up to 100 μm is present. The fine-grained white clast visible on the broken surface shows a fine-grained texture and the same mineralogy as the rest of the sample.

Geochemistry: Olivine Fa29.0±0.1 (Fa28.9-29.1, PMD 0.2%, N=6), low-Ca pyroxene Fs23.8±0.3 Wo1.8±0.0 (N=2), plagioclase An10.3Ab84.5Or5.2. Type 6 clast olivine Fa29.8 (N=1), orthopyroxene Fs23.8Wo1.9 (N=1). Light-gray clast olivine Fa29.2±0.01 (N=4), plagioclase An11.6Ab83.7Or4.7. Magnetic susceptibility log χ (× 10-9 m3/kg) = 3.80 (measured on 23.8 g).

Classification: Ordinary chondrite (LL5, brecciated)

Specimens: Type specimen 22 g and two polished thin and thick sections at CEREGE. Main mass with finder.

Data from:
  MB105
  Table 0
  Line 0:
State/Prov/County:Zanjan
Origin or pseudonym:Cultivated field
Date:2015 July 30
Latitude:36°57.95'N
Longitude:47°41.46'E
Mass (g):2260
Pieces:11
Class:LL5
Shock stage:S3
Weathering grade:W0
Fayalite (mol%):29.0±0.1 (N=6)
Ferrosilite (mol%):23.8±0.3 (N=2)
Wollastonite (mol%):1.8±0.0 (N=2)
Magnetic suscept.:3.80
Classifier:H. Pourkhorsandi, J. Gattacceca (CEREGE)
Type spec mass (g):22
Type spec location:CEREGE
Main mass:Ghadir Mohammadi
Finder:Ghadir Mohammadi
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. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full
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Geography:

Iran
Coordinates:
     Recommended::   (36° 57' 57"N, 47° 41' 28"E)

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