![]() |
||
|
Northwest Africa 8743 | |||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Basic information | Name: Northwest Africa 8743 This is an OFFICIAL meteorite name. Abbreviation: NWA 8743 Observed fall: No Year found: 2014 Country: (Northwest Africa) Mass: ![]() | ||||||||||||||||||||||||
Classification history: |
This is 1 of 71 approved meteorites classified as Eucrite-melt breccia. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||
Comments: | Approved 27 Feb 2015 | ||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 104:
Northwest Africa 8743 (NWA 8743) (Northwest Africa) Purchased: 2014 Classification: HED achondrite (Eucrite, melt breccia) History: A stone was found in northwest Africa. Moroccan dealer Mohammed Sbai sold the stone to an anonymous collector at the Changsha mineral show in May 2014. Physical characteristics: Single pie-shaped stone has patchy dark-gray irregular surface. Fusion crust is not preserved. Petrography: (C. A. Lorenz, Vernad) The rock is a breccia consisting of coarse-grained gabbro fragments (33 vol%) up to 6 × 3 cm and minor fragments of fine-grained pyroxene-feldspar rocks. The rock fragments are embedded into a fine-grained matrix full of fine mineral and rock fragments. The matrix consists of pyroxene and feldspar needles which form a graphic intergrowth. Geochemistry: (N. N. Kononkova, Vernad, EMP) coarse-grained gabbro-pyroxene Fs57.6Wo4.5 (N=10; Fe/Mn = 30.6) Fs55.0-60.3Wo2.2-7.6; feldspar An91.0Ab8.6 (N=12). Classification: Eucrite melt breccia Specimens: A total of 254.1 g (213.3 g cut piece and 40.8 g slice), one thin section and one thick polished section are on deposit at Vernad. An anonymous collector holds the main mass. | ||||||||||||||||||||||||
Data from: MB104 Table 0 Line 0: |
|
||||||||||||||||||||||||
Institutions and collections |
Vernad: Vernadsky Institute of Geochemistry and Analytical Chemistry, Russia (institutional address; updated 21 Feb 2016) |
||||||||||||||||||||||||
Catalogs: |
| ||||||||||||||||||||||||
References: | Published in Meteoritical Bulletin, no. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full
| ||||||||||||||||||||||||
Photos: |
| ||||||||||||||||||||||||
Geography: |
Statistics: This is 1 of 8904 approved meteorites from (Northwest Africa) (plus 1871 unapproved names) |