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Northwest Africa 12570 | |||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 12570 This is an OFFICIAL meteorite name. Abbreviation: NWA 12570 Observed fall: No Year found: 2017 Country: (Northwest Africa) Mass: 74 g | ||||||||||||||||||||||||
Classification history: |
This is 1 of 598 approved meteorites (plus 1 unapproved name) classified as Eucrite. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||
Comments: | Approved 23 Dec 2019 | ||||||||||||||||||||||||
Writeup |
Writeup from MB 108:
Northwest Africa 12570 (NWA 12570) (Northwest Africa) Purchased: 2017 May Classification: HED achondrite (Eucrite) Petrography: The meteorite mainly consists of pyroxene, plagioclase, silica, metal and troilite. The matrix shows a doleritic texture, in which two types of clasts can be observed. The size of pyroxene in coarse-grained clast is up to 1.8mm while those in finer-grained clasts is up to 1.4 mm. Exsolved pyroxene can be also observed. The silica polymorph (5 vol%) is mainly present in the fine-grained clasts. Geochemistry: Low-Ca pyroxene Fs63.3±1.2Wo2.2±1.0, FeO/MnO=33.9±1.3, n=4; High-Ca pyroxene Fs28.9±1.5Wo43.2±1.4, Fe/Mn=34.2±3.0, n=4; (EPMA). | ||||||||||||||||||||||||
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: |
Statistics: This is 1 of 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names) | ||||||||||||||||||||||||
Also see: |
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Revision history: |
This lists important revisions made to data for this record.
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