|
Northwest Africa 6687 | |||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Basic information | Name: Northwest Africa 6687 This is an OFFICIAL meteorite name. Abbreviation: NWA 6687 Observed fall: No Year found: 2010 Country: (Northwest Africa) Mass: 42.4 g | ||||||||||||||||||||||||||
Classification history: |
This is 1 of 334 approved meteorites classified as Lunar (feldsp. breccia). [show all] Search for other: Lunar meteorites | ||||||||||||||||||||||||||
Comments: | Approved 16 Dec 2011 | ||||||||||||||||||||||||||
Writeup |
Writeup from MB 100:
Northwest Africa 6687 (NWA 6687) (Northwest Africa) Purchased: 2010 Classification: Lunar meteorite (feldspathic breccia) History: Found in Morocco in 2010 and purchased from the finder by G. Tomelleri. Physical characteristics: A single black stone (42.4 g) lacking fusion crust. The interior is dark gray and displays several small white clasts. Petrography: (V. Moggi Cecchi, S. Caporali, G. Pratesi, MSP) The overall texture consists of coarse-grained inclusions set in a fine-grained matrix. The matrix contains isolated mineral clasts, mainly consisting of augite, plagioclase and olivine, and a fine grained mineral debris enclosed within a dark, partly glassy and vesicular matrix. The large coarse grained inclusions consist of elongated plagioclase and clinopyroxene crystals set in a glassy matrix. Opaque phases are represented by ilmenite, ulvospinel and chromite. Geochemistry: Olivine (Fa33.7-49.2, Fe/Mn=108, n=20, Cr=1500 ppm, Mn=3100 ppm), augite (Fs23.8.5-31.2En24.9-30.0Wo27.3-30.0 Al-px 13.9-19.5; FeO/MnO mean=65.6; V=400 ppm; Ca=0.61 afu), plagioclase (An83.4Or0.8; K = 0.008 afu); Oxygen isotopes: (I. Franchi, R. Greenwood, OU) δ17O = 3.58, δ18O = 6.84, Δ17O = 0.02 per mil. Classification: Achondrite (lunar, feldspathic breccia). Specimens: 9.5 g sample is on deposit at MSP. | ||||||||||||||||||||||||||
Data from: MB100 Table 1 Line 1483: |
|
||||||||||||||||||||||||||
Plots: | O isotopes: | ||||||||||||||||||||||||||
Institutions and collections |
MSP: Museo di Scienze Planetarie, Via Galcianese 20/H, 59100 Prato, Italy, Italy; Website (institutional address; updated 22 Oct 2022) OU: Planetary and Space Sciences Department of Physical Sciences The Open University Walton Hall Milton Keynes MK7 6AA United Kingdom, United Kingdom (institutional address; updated 8 Dec 2011) |
||||||||||||||||||||||||||
Catalogs: |
| ||||||||||||||||||||||||||
References: | Published in Meteoritical Bulletin, no. 100, MAPS 49, E1-E101 (2014)
| ||||||||||||||||||||||||||
Photos: |
| ||||||||||||||||||||||||||
Geography: |
Statistics: This is 1 of 9589 approved meteorites from (Northwest Africa) (plus 1869 unapproved names) | ||||||||||||||||||||||||||
Also see: |
This lists the most popular meteorites among people who looked up this meteorite.
| ||||||||||||||||||||||||||
Revision history: |
This lists important revisions made to data for this record.
|