Meteorite**NEW NWA Unc., Martian Nakhlite**1.738 gram, Extremely Rare Martian!!!

Description

Hello up for sale is NWA 10645 pairing, Martian Nakhlite classified as a Extremely Rare Martian!!! This beautiful individual weighs 1.738 grams, has gorgeous colors, and very fresh, odd crystal patch, and almost no weathering. It is very similar to the original Nakhla Martian.. we have nicknamed this particular Martian as the "Nakhla Nakhlite", it will actually get a new NWA # and this fragment comes from a 66 gram ultra fresh individual. This is a new find and not paired to the big nakhlite find, this is much fresher and not as much material was found. Freshly broken surfaces reveal a mixture of mm-sized dark-green pyroxene grains and interstitial cream-colored feldspar.  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. This meteorite comes with 2 COA cards Streaming Meteorites and Mark Lyon and display case. Thanks for your interest and take care.
Northwest Africa 10645
This is an OFFICIAL meteorite name.
Abbreviation: NWA 10645
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass:12 g
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
Smithsonian says:
Nakhlites, Martian meteorites named for Nakhla, are igneous rocks that are rich in augite and were formed from basaltic magma about 1.3 billion years ago. Their crystallization ages, compared to a crater-count chronology of different regions on Mars, suggest the Nakhlites formed on the large volcanic regions of Tharsis, Elysium or Syrtis Major Planum. It has been shown that the Nakhlites were suffused with liquid water around 620 million years ago and that they were ejected from Mars around 10.75 million years ago by an asteroid impact. They fell to Earth within the past 10,000 years.