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| Shidian | |||||||||||||||||||||||||||
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| Basic information | Name: Shidian This is an OFFICIAL meteorite name. Abbreviation: There is no official abbreviation for this meteorite. Observed fall: Yes, confirmed fall Year fell: 2017 Country: China Mass:  1809 g | ||||||||||||||||||||||||||
| Classification history: |
This is 1 of 625 approved meteorites classified as CM2. [show all] Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 2), CM chondrites, and CM-CO clan chondrites | ||||||||||||||||||||||||||
| Comments: | Approved 23 Dec 2019 | ||||||||||||||||||||||||||
| Writeup |
Writeup from MB 108:
Shidian 24°42’27.54"N, 99°4’41.92"E Yunnan, China Confirmed fall: 2017 Nov 27 Classification: Carbonaceous chondrite (CM2) History: On November 27, 2017, at about 14:30 local time, the fall of two stones were witnessed by eight local villagers and collected by one of them. The two stones fell in Dapuzhai and Chenjiazhai villages, in Shidian county, Yunan province. The two meteorites are 235 g (E 99°4’29.20", N24°41’54.81") and 1574 g (E 99°4’41.92", N24°42’27.54"), separated by about 1 km. Physical characteristics: Two meteorites partly covered with fusion crust were recovered. The interior of the stones are black with abundant white dots. Petrography: The meteorite consists of fine-grained matrix material (84.6 vol%) containing phyllosilicates, type I chondrules (15.4 vol%; average apparent diameter 380±120 µm, n=11) and rare CAIs. The dominant mineral of the meteorite is olivine and serpentine. Accessory minerals include troilite and calcite. Most chondrules are altered, but there still exist a few chondrules and forsteritic olivine. Geochemistry: Forsterite Fa0.51±0.16, range Fa0.29-0.90 (N=11, EPMA). Classification: Carbonaceous chondrite (CM2). | ||||||||||||||||||||||||||
| Data from: MB108 Table 0 Line 0: |
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| Institutions and collections |
IGCAS: Institute of Geochemistry Chinese Academy of Sciences, Guiyang, China (institutional address; updated 27 Mar 2018) |
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| Catalogs: |
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| References: | Published in Meteoritical Bulletin, no. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150
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Geography:
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Statistics: This is 1 of 5 approved meteorites from Yunnan, China This is 1 of 476 approved meteorites from China (plus 12 unapproved names) (plus 1 impact crater) | ||||||||||||||||||||||||||
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