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Banma
Basic information Name: Banma
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: Yes, confirmed fall
Year fell: 2016
Country: China
Mass:help 10.05 kg
Classification
  history:
Recommended:  L5    [explanation]

This is 1 of 5941 approved meteorites (plus 2 unapproved names) classified as L5.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 15 Oct 2016
Writeuphelp
Writeup from MB 105:

Banma        33°15.18’N, 100°27.9’E

Qinghai, China

Confirmed fall: 2016 Aug 24

Classification: Ordinary chondrite (L5)

History: On 24 August 2016, at about 21:00 local time, several nomads of Banma City, Qinghai province, saw a bright object flying from a southeasterly direction, followed by a loud explosion. The next day, the nomads searched in the direction of the explosion and found a black stone embedded in the ground in a small crater on a hillside.

Physical characteristics: The stone is relatively flat and 32 × 23 cm and 18 cm thick. Fusion crust and regmaglypts are well preserved.

Petrography: Chondrule outlines are obscure. The matrix displays a moderate to high degree of recrystallization. Poorly defined BO chondrules are 0.4-0.6 mm wide. All the feldspar grains are relatively small, less than 50 μm. Numerous FeNi metal and FeS grains are present.

Geochemistry: (W. Hsu, PMO) Olivine, Fa24.0±0.4 (n=14), range Fa23.2-24.8. Low-Ca pyroxene, Fa20.3±0.5Wo1.6±0.1 (n=10), range Fs19.7-21.4Wo1.5-1.8.

Classification: Ordinary chondrite, L5, S2, W0

Specimens: 64 g at PMO. Main mass at the Banma City Hall.

Data from:
  MB105
  Table 0
  Line 0:
State/Prov/County:Qinghai
Origin or pseudonym:Hill
Date:2016 Aug 24
Latitude:33°15.18'N
Longitude:100°27.9'E
Mass (g):10050
Pieces:1
Class:L5
Shock stage:S2
Weathering grade:W0
Fayalite (mol%):24.0±0.4 (n=14)
Ferrosilite (mol%):20.3±0.5 (n=10)
Wollastonite (mol%):1.6±0.1 (n=10)
Classifier:Li Y., PMO
Type spec mass (g):64
Type spec location:PMO
Main mass:Banma City Hall
Comments:Submitted by Hsu W.
Institutions
   and collections
PMO: Purple Mountain Observatory, Nanjing, China (institutional address; updated 16 Dec 2011)
Catalogs:
References: Published in Meteoritical Bulletin, no. 105, in preparation (2016)
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Geography:

China
Coordinates:
     Recommended::   (33° 15' 11"N, 100° 27' 54"E)

Statistics:
     This is 1 of 7 approved meteorites from Qinghai, China
     This is 1 of 227 approved meteorites from China (plus 8 unapproved names) (plus 1 impact crater)
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