![]() |
||
|
Northwest Africa 15435 | |||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Basic information | Name: Northwest Africa 15435 This is an OFFICIAL meteorite name. Abbreviation: NWA 15435 Observed fall: No Year found: 2021 Country: (Northwest Africa) Mass: ![]() | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 453 approved meteorites classified as Howardite. [show all] Search for other: Achondrites, HED achondrites, and Howardites | ||||||||||||||||||||||||||||||
Comments: | Approved 29 Jan 2023 | ||||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 112:
Northwest Africa 15435 (NWA 15435) (Northwest Africa) Purchased: 9 Sep 2021 Classification: HED achondrite (Howardite) History: Purchased on 9 Sept 2021 by Chris Monk from Younes Chaoui. Physical characteristics: Single stone with dark-brown fusion crust. Petrography: (D. Sheikh, Cascadia) Sample is brecciated and is composed primarily of mm-cm-sized sub-angular to sub-rounded lithic clasts (proportions roughly ~60% diogenitic and ~40% eucritic lithologies) and monomineralic clasts set within a finer-grained, fragmental matrix. Accessory phases include Cr-spinel, ilmenite, SiO2-rich glass, and troilite. Geochemistry: Diogenite Clasts [Olivine (Fa27.0±1.1, range Fa25.4-28.1, Fe/Mn=46±3, n=5), Low-Ca Pyroxene (Fs27.5±5.0Wo2.8±1.0, range Fs21.7-37.9Wo1.4-5.3, Fe/Mn=30±3, n=40)]; Eucrite Clasts [Olivine (Fa35.4±3.0, range Fa33.7-41.8, Fe/Mn=53±5, n=7), Low-Ca Pyroxene (Fs51.7±7.5Wo3.2±1.4, range Fs43.1-59.4Wo1.6-5.4, Fe/Mn=29±2, n=6), Pigeonite (Fs46.5±8.9Wo9.1±5.5, range Fs30.0-57.0Wo5.9-22.2, Fe/Mn=29±3, n=8), High-Ca Pyroxene (Fs 22.1±3.2Wo40.7±1.7, range Fs19.2-25.5Wo38.9-42.2, Fe/Mn=25±2, n=3), Calcic Plagioclase (An91.9±2.7, range An84.1-94.6, n=26)]. Classification: Achondrite (Howardite). Specimens: 21.7 g at Cascadia, main mass with Chris Monk. | ||||||||||||||||||||||||||||||
Data from: MB112 Table 0 Line 0: |
|
||||||||||||||||||||||||||||||
Institutions and collections |
Cascadia: Cascadia Meteorite Laboratory, Portland State University, Department of Geology, Room 17 Cramer Hall, 1721 SW Broadway, Portland, OR 97201, United States; Website (institutional address; updated 28 Oct 2011) |
||||||||||||||||||||||||||||||
Catalogs: |
| ||||||||||||||||||||||||||||||
References: | Published in Meteoritical Bulletin, no. 112, in preparation (2023)
| ||||||||||||||||||||||||||||||
Geography: |
Statistics: This is 1 of 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names) |