| MetSoc Home Publications Contacts |
|
||
|
||
| Northwest Africa 584 | |||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Basic information | Name: Northwest Africa 584 This is an OFFICIAL meteorite name. Abbreviation: NWA 584 Observed fall: No Year found: 2000 Country: (Northwest Africa) Mass:  187 g | ||||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 81 approved meteorites classified as H3-5. [show all] Search for other: H chondrites, H chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3) | ||||||||||||||||||||||||||||||||
| Comments: | Approved 24 Aug 2015 | ||||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 104:
Northwest Africa 584 (NWA 584) (Northwest Africa) Purchased: 2000 Classification: Ordinary chondrite (H3-5) History: One stone weighing 187 g was found in Morocco in 2000. Thomas Webb acquired the sample from a Michael Cottingham in 2000. Physical characteristics: The oriented stone is brown and ovoid in shape. A weathered, dark brown fusion crust covers approximately 35% of the exterior of the stone. The cut face of the interior of the stone is brown and displays small chondrules, chondrule fragments and fresh and weathered flakes of metal. Petrography: Description and classification (A. Love, App): Sample is composed of well-defined chondrules, chondrule fragments, mineral clasts metallic grains and sulfides set within a recrystallized matrix. CL and SEM petrography indicate sample is a mixture chondrules and fragments. Chondrules contain turbid to devitrified mesostases and have an average diameter of 392 μm. Geochemistry: (A.Love, App) Unequilibrated regions: Olivine Fa14.2±6.6 (Fa0.8-26.2 N=23); Low Ca pyroxene Fs12.3±5.2 (Fs2.9-18.6 N=12) Specimens: 25.9 g and 1 polished thin section are on deposit at App. | ||||||||||||||||||||||||||||||||
| Data from: MB104 Table 0 Line 0: |
|
||||||||||||||||||||||||||||||||
| Institutions and collections |
App: Department of Geology, 572 Rivers St., Appalachian State University, Boone, NC 28608, United States (institutional address; updated 7 Mar 2013) TWebb: No contact information provided., United States (private address) |
||||||||||||||||||||||||||||||||
| Catalogs: |
| ||||||||||||||||||||||||||||||||
| References: | Published in Meteoritical Bulletin, no. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full
| ||||||||||||||||||||||||||||||||
| Geography: |
Statistics: This is 1 of 8402 approved meteorites from (Northwest Africa) (plus 1899 unapproved names) | ||||||||||||||||||||||||||||||||