NWA 12338 Achondrite-ung Meteorite - G688-0024 - 0.15g - Rare Slice

Description: Hello and thank you for viewing my listing. Today you are purchasing an extremely rare meteorite named NWA 12338, Achondrite-ungrouped Meteorite from Northwest Africa. NWA 12338 is an official name, took 2.5 years to finish this one and it is still currently being studied and more papers are being written. Someone has asked, the papers being written and published are being done in Bayreuth Germany by Audrey Bouvier. Extremely rare classification, ungrouped are the best! I rarely offer this meteorite as it is one of my pride and joy classifications. Below is the data for my classification. Excellent addition to your collection. This is a part slice specimen, catalog number G688-0024, weighing in at 0.15 grams and comes with my card of authenticity for provenance. Remember, provenance is a must when collecting meteorites. I have designed my own card for NWA 12338, as I do with all of my classified material. The specimen you see is the exact specimen you will receive. Please stop by my store here on eBay to find my newest classifications. Cheers! Thanks again for viewing and my shipping is like this, the first is usually only $4.79 and .50 cents for each additional item, unless over 60 grams, then 1.00 per item. Everyone is given the opportunity to shop for two full weeks without ever exceeding 10.00 shipping, no matter how many you win or buy over the two-week period! Cheers and thanks again for stopping by. Northwest Africa 12338Basic informationName: Northwest Africa 12338 This is an OFFICIAL meteorite name. Abbreviation: NWA 12338 Observed fall: No Year found: 2016 Country: (Northwest Africa) Mass: 1127 g Classification history:Meteoritical Bulletin: MB 107 (2018) Achondrite-ungRecommended: Achondrite-ung [explanation] This is 1 of 160 approved meteorites classified as Achondrite-ung. [show all] Search for other: Achondrites, Ungrouped achondrites Comments:Approved 11 Dec 2018WriteupWriteup from MB 107: Northwest Africa 12338 (NWA 12338)(Northwest Africa)Purchased: 2016 NovClassification: Ungrouped achondritePhysical characteristics: The repository specimen has a brown fusion crust surface and a light-gray, fresh interior.Petrography: (Z.G. Guo, UWO) This is an unbrecciated basaltic meteorite with fine-grained ophitic texture including ~100 μm-sized clinopyroxene (~55%), and 100-500 μm-sized plagioclase (~35%). Plagioclase is not acicular, as usually found in eucrites, but instead is interstitial between clinopyroxene crystals. Olivine (~5%) is found as ~100 μm individual crystals. It has a low content (<1%) of metal (partially weathered), chromite and troilite. Undulatory (up to mosaic) extinction is observed in plagioclase, with silica veinlets, which indicate a moderate shock stage.Geochemistry: (EMPA, Z.G. Guo and M. Beauchamp, UWO) Olivine Fa70.0±0.2, Fe/Mn=44±1 (n=10); pigeonite Fs40.5±3.3Wo10.6±4.1, Fe/Mn=30±1 (n=20); plagioclase An89.1±1.4 (n=10); Bulk chemistry (INAA, R. Korotev, WashU) Na2O 0.495%, CaO 10.2%, FeO 15.3%, and (all in ppm) Cr 3043, Co 16, Sr 92, Ba 19, La 1.05, Sm 0.74, Hf 0.52, Th 0.10, and U 0.16. (laser fluorination oxygen isotope analyses, A. Alexandre; L. Webb, UWO) acid-washed bulk rock powder Δ17O=-0.18±0.01, δ17O=1.980±0.203, δ18O=4.16±0.37 (n=2).Classification: Achondrite, ungrouped. This meteorite is an anomalous eucrite-like basaltic meteorite similar to other specimens which have been found to diverge from the HED oxygen mass fractionation line (similarly to PCA 91007 and Pasamonte, and significantly above the HED line). It has geochemical characteristics of eucrites for major element mineral compositions, and of cumulate eucrites for bulk trace element chemistry. But its mineral sssemblage with the presence of igneous olivines, texture, and its oxygen isotopic composition indicate a different parent body from HED, thus an ungrouped achondrite classification.Specimens: 24.0g at UWO including a probe mount.Data from: MB107 Table 0 Line 0:Place of purchase:Erfoud, MoroccoDate:P 2016 NovMass (g):1126.5Pieces:1Class:Achondrite-ungShock stage:moderateWeathering grade:lowFayalite (mol%):70.0±0.2 (N=10)Ferrosilite (mol%):40.5±3.3 (N=20)Wollastonite (mol%):10.6±4.1 (N=20)Classifier:Z.G. Guo, UWOType spec mass (g):24.0Type spec location:UWOMain mass:S. TutorowComments:G688; submitted by A. BouvierPlots:O isotopes:

Price: 6.95 USD

Location: Hebron, North Dakota

End Time: 2024-11-21T05:33:13.000Z

Shipping Cost: 4.79 USD