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Northwest Africa 13305
Basic information Name: Northwest Africa 13305
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13305
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass:help 13.08 kg
Classification
  history:
Recommended:  H7    [explanation]

This is 1 of 24 approved meteorites classified as H7.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 31 May 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 13305 (NWA 13305)

(Northwest Africa)

Purchased: 2018 Mar

Classification: Ordinary chondrite (H7)

Petrography: (K. Metzler, IfP) Ordinary chondrite with distinct recrystallization texture. Large secondary feldspar grains (many with sizes >100 μm) which frequently poikilitically enclose olivine and pyroxene grains. Some mm-sized roundish inclusions, consisting of distinctly larger olivine and pyroxene grains with interstitial plagioclase may represent chondrule relicts.

Geochemistry: Mineral compositions and geochemistry: The mean olivine composition is Fa17.4±0.2 (Fa17.2-17.7; n=14). The mean low-Ca pyroxene composition is Fs15.3±0.3Wo2.9±0.7 (Fs14.8-17.7Wo1.3-4.0; n=15); Mean CaO concentration in low-Ca pyroxene: 1.5±0.4 (0.7-2.1) wt%.

Classification: H chondrite based on mineral chemistry. Petrologic type 7 based on the equilibrated state of olivine and pyroxene, and large grain size of secondary plagioclase.

Specimens: 60 g: José Antonio Sánchez Santana, Malaga, Spain

Data from:
  MB109
  Table 0
  Line 0:
Place of purchase:Zouérat, Mauritania
Date:P 2018 Mar
Mass (g):13080
Pieces:1
Class:H7
Shock stage:S1
Weathering grade:W0/1
Fayalite (mol%):17.4±0.2 (n=14)
Ferrosilite (mol%):15.3±0.3 (n=15)
Wollastonite (mol%):2.9±0.7
Classifier:K. Metzler, IfP
Type spec mass (g):20
Type spec location:IfP
Main mass:Lahbib Alfara, Mauritania
Comments:Submitted by K. Metzler, IfP
Institutions
   and collections
IfP: Institut für Planetologie, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany (institutional address; updated 23 Jan 2012)
Catalogs:
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7328 approved meteorites from (Northwest Africa) (plus 1973 unapproved names)

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