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Northwest Africa 13175
Basic information Name: Northwest Africa 13175
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13175
Observed fall: No
Year found: 2018
Country: Algeria
Mass:help 281 g
Classification
  history:
Recommended:  H5    [explanation]

This is 1 of 10254 approved meteorites (plus 18 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
Writeuphelp
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:
Date:2018
Mass (g):280.66
Pieces:1
Class:H5
Shock stage:C-S3
Weathering grade:W3
Fayalite (mol%):19.1±0.1
Ferrosilite (mol%):17.0±0.1
Wollastonite (mol%):1.2±0.1
Magnetic suscept.:4.71
Classifier:A. Love, App
Type spec mass (g):20
Type spec location:App
Main mass:Dave Lehman
Finder:Unknown
Comments:Submitted by Anthony Love
Institutions
   and collections
App: Department of Geology, 572 Rivers St., Appalachian State University, Boone, NC 28608, United States (institutional address; updated 7 Mar 2013)
Catalogs:
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
Find references in NASA ADS:
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Geography:

Algeria
Coordinates:Unknown.

Statistics:
     This is 1 of 1088 approved meteorites from Algeria (plus 26 unapproved names) (plus 4 impact craters)

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