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0.624g Martian Meteorite - Mars Nakhlite Meteorite Fragment | NWA 10645

Top Meteorite

  • $ 625.00


 

On Offer: Martian Meteorite 0.624g

Type: Nakhlite
Origin: Mars
Official name: NWA 10645
Description: A 0.624 gram crusted fragment of a beautiful and rare Martian meteorite. This is a stunning 0.624 gram specimen of a cumulate achondrite from Mars, with beautiful black crust on one side. This type of martian meteorite is known as a "Nakhlite" and was given the official name of NWA 10645. This was one of my earliest classifications.
What you get: 0.624g NWA10645 Martian Meteorite Specimen as shown, membrane storage/display box, signed 5x7 double sided color Certificate of Authenticity 
I offer a 100% no questions asked 30 day return policy.  

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Northwest Africa 10645
Basic information Name: Northwest Africa 10645
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10645 
Observed fall: No
Year found: 2016
Country: (Northwest Africa) 
Mass:help 12 g
Classification
  history:
Recommended:   Martian (nakhlite) [explanation]

This is 1 of 18 approved meteorites classified as Martian (nakhlite). [show all]
Search for other: Martian meteorites
Comments: Approved 15 May 2016
Writeuphelp
Writeup from MB 105: 

Northwest Africa 10645 (NWA 10645)

(Northwest Africa)

Purchased: 2016

Classification: Martian meteorite (Nakhlite)

 

History: Purchased by Dustin Dickens, February 2016, from a Moroccan dealer.

 

Physical characteristics: The exterior is partially covered by black fusion crust. Freshly broken surfaces reveal a mixture of mm-sized dark-green pyroxene grains and interstitial cream-colored feldspar.

 

Petrography: (C. Agee, UNM) This meteorite has an ophitic texture consisting of 75% augite, 15% feldspar, and 5% olivine. Some augite crystals are prismatic and up to 2 mm in length. There are two feldspars present, oligoclase and alkali feldspar, no maskelynite was observed; feldspar commonly occupies interstices between augite grains. Augites show igneous zoning with Fs-rich rims, olivines are fayalitic and fairly uniform in composition. Apatite, ilmenite, and titanomagnetite were observed.

 

Geochemistry: (C. Agee and M. Spilde, UNM) Olivine Fa88.1±0.8, Fe/Mn=41±1, n=5; augite Fs31.9±10.2Wo38.9±2.1, range Fs24.1-48.9Wo33.3-40.5, Fe/Mn=35±2, n=10; plagioclase An22.9±2.7Ab73.0±3.0Or4.1±0.6, n=4; alkali feldspar An3.3Ab40.4Or56.2, n=1.

 

Classification: Martian (nakhlite). This is a martian meteorite based Fe/Mn of augite and olivine, and on the composition of the plagioclase. It is a nakhlite based on the high percentage of augite present. Paired with NWA 10153.

 

Specimens: 2.5 g including a probe mount on deposit at UNM; Dustin Dickens holds the main mass.

Data from:
  MB105
  Table 0
  Line 0:
Place of purchase: Morocco
Date: P 2016
Mass (g): 12
Pieces: 1
Class: Martian (nakhlite)
Shock stage: moderate
Weathering grade: low
Fayalite (mol%): 88.1±0.8
Ferrosilite (mol%): 31.9±10.2
Wollastonite (mol%): 38.9±2.1
Classifier: C. Agee, UNM
Type spec mass (g): 2.5
Type spec location: UNM
Main mass: Dustin Dickens
Comments: Field name TMS-1; submitted by C. Agee, UNM

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