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26.4g L3.10 Chondrite Meteorite End Piece
Top Meteorite
- $ 985.00
On Offer: 26.4 gram L3.10 Chondrite meteorite end piece.
Name: Northwest Africa 7980
Abbreviation: NWA 7980
Type: Ordinary Chondrite (L3.10)
Observed fall: No
Year found: 2013
Country: Morocco
Description: A rare unequilibrated L3.10 chondrite with beautiful chondrules. Many of the chondrules are armored (surrounded by metal). As of this listing, only ten L3.10 chondrites have been classified. This is a rare difficult to find unequilibrated L3.10 chondrite with a low 386.2 gram total known weight (TKW). Unequilibrated subtypes of 3.00 to 3.15 are barely altered from their original accretion and are quite rare. They require substantially more analysis points for the classification, as the exact extent of equilibration is established by averaging the wt% of Cr2O3 against its standard deviation over many analysis points in the ferroan olivine of type II chondrules.
What you get: 26.4g L3.10 Ordinary chondrite meteorite as shown, and signed Certificate of Authenticity.
We offer a 100% no questions asked 30 day return policy.
Northwest Africa 7980
Status: Official
| Basic information |
Name: Northwest Africa 7980 This is an OFFICIAL meteorite name. Abbreviation: NWA 7980 Observed fall: No Year found: 2013 Country: Morocco Mass: 386g |
|---|---|
| Classification history: |
Meteoritical Bulletin, MB 102 (2013): L3.10
|
| Comments: | Approved 13 Sep 2013 |
| Writeup | Writeup from MB 102: Northwest Africa 7980 (NWA 7980) Morocco Purchased: 2013 Classification: Ordinary chondrite (L3.10) History: Purchased by Brahim Tahiri from a Moroccan hunter and sent to Sean Tutorow for classification, 2012. Physical characteristics: Thirty two matching fragments, dark weathered fusion crust, broken surface reveals many densely packed orange-brown chondrules of variable size, set in darker matrix. Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows numerous unequilibrated chondrules, many are porphyritic, apparent mean diameter 545±288 μm, range measured 200-1300 μm, n=40. Abundant opaque matrix, most chondrules with glass or mesostasis. Geochemistry: (C. Agee and N. Muttik, UNM) Ferroan olivine Fa20.0±7.2, Fe/Mn=48±15, Cr2O3=0.27±0.18 wt%, range Cr2O3=0.04-0.86 wt%, CaO=0.17±0.09 wt%, n=29; low-Ca pyroxene Fs12.0.±9.2Wo1.2±2.2, Fe/Mn=22±13, n=33. Classification: Ordinary chondrite (L3.10), type 3.10 based on ferroan olivine mean Cr2O3 content and sigma from Grossman and Brearley (2005). Weathering grade W2. Specimens: 20.7 g including a probe mount on deposit at UNM, Sean Tutorow holds the main mass. |
| Bibliography: |
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| Data from: MB102 Table 0 Line 0: |
Place of purchase: Morocco Date: P 2013 Mass (g): 386.2 Pieces: 32 Class: L3.10 Weathering grade: W2 Fayalite (mol%): 20.0±7.2 Ferrosilite (mol%): 12.0.±9.2 Wollastonite (mol%): 1.2±2.2 Classifier: C. Agee, UNM Type spec mass (g): 20.7 Type spec location: UNM Main mass: Sean Tutorow Comments: Field name G-415; submitted by C. Agee |
| Institutions and collections | UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 2015-02-12) |
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