![]() |
||
|
Northwest Africa 7193 | |||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Basic information | Name: Northwest Africa 7193 This is an OFFICIAL meteorite name. Abbreviation: NWA 7193 Observed fall: No Year found: 2012 Country: (Northwest Africa) Mass: ![]() | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 15 approved meteorites classified as Eucrite-an. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||||||||
Comments: | Approved 4 Jun 2013 | ||||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 102:
Northwest Africa 7193 (NWA 7193) (Northwest Africa) Purchased: 2012 Jan Classification: HED achondrite (Eucrite, anomalous) History: Purchased by GHupé in 2012 January from a Moroccan dealer at the Tucson Gem and Mineral Show. Petrography: Fresh clast-rich breccia consisting of large clasts of medium-grained, ophitic to intersertal diabasic eucrite within a very sparse fragmental matrix. The clasts are composed of prismatic, complexly-zoned pyroxene, calcic plagioclase laths, fayalitic olivine, ilmenite, iron sulfide, Ni-free metal and regions of dark mesostasis. Geochemistry: Orthopyroxene cores (Fs29.0Wo4.6; FeO/MnO = 28), pigeonite (Fs32.5Wo6.2; FeO/MnO = 31); subcalcic augite (Fs56.7Wo30.9; FeO/MnO = 32) with ferroan pigeonite rims (Fs53.1Wo18.1; FeO/MnO = 29); olivine (Fa81.4 ; FeO/MnO = 42). Oxygen isotopes (R. Tanaka, OkaU): analyses of acid-washed subsamples by laser fluorination gave δ17O 1.78, 1.84; δ18O 3.81, 3.81; Δ17O -0.228, -0.163 per mil. Classification: Basaltic eucrite (anomalous). This specimen is unusual because of its diabasic texture and complexly-zoned pyroxenes. | ||||||||||||||||||||||||||||||
Data from: MB102 Table 0 Line 0: |
|
||||||||||||||||||||||||||||||
Plots: | O isotopes: | ||||||||||||||||||||||||||||||
Institutions and collections |
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012) UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012) GHupé: Gregory M. Hupé, 9003 Placid Lakes Blvd., Lake Placid, FL 33852, United States; Website (private address) OkaU: Institute for Study of the Earth's Interior, Okayama University, Misasa Tottori 682-0193, Japan (institutional address) |
||||||||||||||||||||||||||||||
Catalogs: |
| ||||||||||||||||||||||||||||||
References: | Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015
| ||||||||||||||||||||||||||||||
Geography: |
Statistics: This is 1 of 9305 approved meteorites from (Northwest Africa) (plus 1873 unapproved names) |