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Northwest Africa 8538 | |||||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 8538 This is an OFFICIAL meteorite name. Abbreviation: NWA 8538 Observed fall: No Year found: 2014 Country: (Northwest Africa) Mass: 995 g | ||||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 22 approved meteorites classified as LL6-melt breccia. [show all] Search for other: LL chondrites, LL chondrites (type 4-7), Melted chondrites, Ordinary chondrites, and Ordinary chondrites (type 4-7) | ||||||||||||||||||||||||||||||||
Comments: | Approved 3 Oct 2014 | ||||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 103:
Northwest Africa 8538 (NWA 8538) Northwest Africa Purchased: 2014 Classification: Ordinary chondrite (LL6, melt breccia) History: One stone weighing 994.8 g was found in Morocco and purchased by Reed in July 2014. Physical characteristics: Black fusion crust covers 65% of the irregular-shaped stone. The interior shows several different types of clasts crosscut by a prominent melt vein. Petrography: Description and classification (A. Love, App): Sample is a breccia composed of ~3.5 cm irregular to rounded clasts of two recrystallized chondritic lithologies (one showing distinct shock and weathering characteristics from the other) surrounded by ~1.0 cm melt veins composed of vesicular, clast-laden shock-melt material. Relict chondrules within the clasts have an average diameter of 683 μm. One cellular-textured mixed metal nodule was observed. Geochemistry: (A. Love, App) Clasts and melt material approach uniform composition. Fa30.4±0.7, n=19; low Ca pyroxene Fs26.2±0.5Wo2.4±0.4, n=12. Classification: Ordinary Chondrite (LL6-melt breccia, S4, W3) Specimens: 25.52 g and 2 polished thin sections and a polished mount are on deposit at App. | ||||||||||||||||||||||||||||||||
Data from: MB103 Table 0 Line 0: |
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Institutions and collections |
App: Department of Geology, 572 Rivers St., Appalachian State University, Boone, NC 28608, United States (institutional address; updated 7 Mar 2013) Reed: Blaine Reed, P.O. Box 1141, Delta, CO 81416, United States; Website (private address) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 103, MAPS 52, 1014, May 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12888/full
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Geography: |
Statistics: This is 1 of 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names) | ||||||||||||||||||||||||||||||||
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Revision history: |
This lists important revisions made to data for this record.
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