|
On eBay Now...
24.4g Ungrouped Achondrite Meteorite Beautiful Slice - NWA 12338 I TOP For Sale
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
24.4g Ungrouped Achondrite Meteorite Beautiful Slice - NWA 12338 I TOP:
$1950.00
On Offer:24.4 gram full beautiful slice ofNWA12338 achondrite-ung Approximate Dimensions: 109mm x 68.6mm x 2mm Classification:Achondrite Ungrouped - this is an ungrouped achondrite from an unknown differentiated parent body. Origin:Unkown Description:Beautifulslice ofan amazing ungrouped achondritic meteorite. What you get:meteorite specimen as shown & signed Certificate of Authenticity.
We offer a 100% no questions asked30 day return policy.
SEE OFFICIAL METEORITICAL SOCIETY ENTRY BELOW
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 is 1 of 100 approved meteorites classified as Achondrite-ung.[show all]
Search for other:Achondrites,Ungrouped achondrites
Comments:Approved 11 Dec 2018WriteupWriteup fromMB 107:
Northwest Africa 12338(NWA 12338) (Northwest Africa) Purchased: 2016 Nov Classification: Ungrouped achondrite Physical 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 toPCA 91007andPasamonte, 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 atUWOincluding a probe mount. Data from:
MB107
Table 0
Line 0:Place of purchase:Erfoud, MoroccoDate:P 2016 NovMass 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:
Track Page Views With
Auctiva\'s Counter
24.4g Ungrouped Achondrite Meteorite Beautiful Slice - NWA 12338 I TOP $1950.00
|
