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Xincheng
Basic information Name: Xincheng
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2015
Country: China
Mass:help 7 kg
Classification
  history:
Recommended:  L3    [explanation]

This is 1 of 593 approved meteorites classified as L3.   [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 22 Apr 2017
Writeuphelp
Writeup from MB 106:

Xincheng        36°10.445’N, 103°25.60’E

Gansu, China

Find: 2015-7-26

Classification: Ordinary chondrite (L3)

History: Found by Xing Baoyu in July 26, 2015, in the Gobi desert close to Xincheng town, Lanzhou city.

Petrography: The thin section exhibits abundant well-defined chondrules (up to 1.2 mm) of different kinds, such as PO, PP, POP, BO, and minor RP. Interstitial glass is observed within some barred and porphyritic chondrules. The matrix is fine-grained silicates with minor metal, troilite and Fe-oxides. Mineral and chondrule clasts are also present. Metallic phases account for ~5 vol%.

Geochemistry: Silicate grains are unequilibrated with chemical zoning. Olivine Fa9.3-24.2 (Fa21.2±3.6, PMD=11.5%, n=34); low-Ca pyroxene Fs2.2-25.2Wo0-2 (Fs12.9±7.9Wo0.7±1.2, Fs PMD=47.4%, n=30); minor pigeonite (Fs16.3-33.4Wo5.9-14.2) and Ca-rich pyroxene (Fs2.1-6.5Wo28.7-42.9). Plagioclase is Na-rich (Ab52.4-95.6An26.4-4.4, average Ab75.8±18.1An15.6±9.2, n=8).

Classification: L3 classification based on metal abundance and moderate sized chondrules with varies textures. Petrological type is determined based on unequilibrated silicates (PMD 5%).

Specimens: 690 g at PMO.

Data from:
  MB106
  Table 0
  Line 0:
State/Prov/County:Gansu
Origin or pseudonym:Gobi Desert
Date:2015-7-26
Latitude:36°10.445'N
Longitude:103°25.60'E
Mass (g):7000
Pieces:1
Class:L3
Shock stage:S3
Weathering grade:W3
Fayalite (mol%):21.2±3.6 (n=34)
Ferrosilite (mol%):12.9±7.9 (n=30); 21.7±7.9 (n=4); 4.3±2.2(n=4)
Wollastonite (mol%):0.7±1.2 (n=30); 8.7±3.8 (n=4); 35±6.3(n=4)
Classifier:Wu Y., PMO
Type spec mass (g):690
Type spec location:PMO
Main mass:Xing Baoyu
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. 106, in preparation (2017)
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Geography:

China
Coordinates:
     Recommended::   (36° 10' 27"N, 103° 25' 36"E)

Statistics:
     This is 1 of 5 approved meteorites from Gansu, China
     This is 1 of 238 approved meteorites from China (plus 8 unapproved names) (plus 1 impact crater)
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