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Northwest Africa 13175 | |||||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 13175 This is an OFFICIAL meteorite name. Abbreviation: NWA 13175 Observed fall: No Year found: 2018 Country: Algeria Mass: 281 g | ||||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 11567 approved meteorites (plus 23 unapproved names) classified as H5. [show all] Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7) | ||||||||||||||||||||||||||||||||
Comments: | Approved 5 Feb 2020 | ||||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 109:
Northwest Africa 13175 (NWA 13175) Algeria Find: 2018 Classification: Ordinary chondrite (H5) History: The 280.66g sample was found by a meteorite prospector near Tindouf, Algeria, in October, 2018. Dave Lehman and his partner acquired the sample from the finder. Physical characteristics: Sample is irregular in shape and has a dark brown, wind-ablated exterior. The interior of the stone shows chondrules and fragments set within a recrystallized matrix. Petrography: Classification and Description (A. Love, App): Sample shows recrystallized chondritic texture composed of closely packed chondrules with an avg. apparent diameter 407 μm (n=15). Secondary albitic plagioclase has an average size of 37 μm (n=9). Additional minerals are: troilite, apatite, chromite, weathered FeNi. Geochemistry: (A. Love, App): Olivine (Fa19.1±0.1, Fe/Mn=34.6±0.5, n=3), low-Ca pyroxene (Fs17.0±0.1Wo1.2±0.1, n=3). Classification: Ordinary chondrite (H5, C-S3, W3) Based on mineral compositions, chondrule diameter and size of secondary plagioclase, this sample is an H5. Specimens: Dave Lehman and his partner hold the main mass. Two slices totaling 20 g and a polished mount are on deposit at App. | ||||||||||||||||||||||||||||||||
Data from: MB109 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) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 109, in preparation (2020)
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Geography: |
Statistics: This is 1 of 1356 approved meteorites from Algeria (plus 30 unapproved names) (plus 4 impact craters) | ||||||||||||||||||||||||||||||||
Also see: |
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Revision history: |
This lists important revisions made to data for this record.
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