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Northwest Africa 7684
Basic information Name: Northwest Africa 7684
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7684
Observed fall: No
Year found: 2011
Country: Morocco
Mass:help 314 g
Meteoritical Bulletin:  MB 102  (2013)  H4
Recommended:  H4    [explanation]

This is 1 of 6459 approved meteorites (plus 2 unapproved names) classified as H4.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 1 Feb 2013
Writeup from MB 102:

Northwest Africa 7684 (NWA 7684)


Found: 2011

Classification: Ordinary chondrite (H4)

History: One mostly crusted stone with a mass of 314 g; it was found and purchased in Morocco in 2011. The sample was acquired from a prospector in 2011 by Thomas Webb.

Physical characteristics: Weathered fusion crust covers the entirety of the stone except for a fractured area on one side of the weakly rectangular stone and regmaglypts cover a portion of the stone.

Petrography: (Anthony Frushour, App): The sample has a chondritic texture with well-defined chondrules in a slightly recrystallized matrix. Chondrules and fragments are well packed. The sample contains RP, PP, poikolitic OP, POP, PO, BO and GO chondrules that have an average diameter of 1.34 mm. Porphyritic chondrules display weakly devitrified matrix to fully recrystallized mesostasis with plagioclase visible. Clinoenstatite is common in pyroxene chondrules. Fe-Ni metal and troilite occur both as individual grains and intergrown masses of metal, mineral grains also occur mixed with some of the Fe-Ni metal and troilite.

Geochemistry: (A. Frushour, App): Olivine, Fa17.9±0.2 (PMD=0.9, N=17); low-Ca pyroxene, Fs15.2±0.4 (PMD=2.1, N=14), Wo0.9±0.1 (PMD=12.9, N=14).

Specimens: 20 g and 1 thin section on deposit at App

Data from:
  Table 0
  Line 0:
Place of purchase:Erfoud, Morocco
Mass (g):314
Shock stage:S3
Weathering grade:W2
Fayalite (mol%):17.9±0.2 (N=17)
Ferrosilite (mol%):15.2±0.4 (N=14)
Wollastonite (mol%):0.9±0.1 (N=14)
Classifier:Anthony Frushour, App
Type spec mass (g):20
Type spec location:App
Main mass:TWebb
Comments:Submitted by Anthony Love
   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)
References: Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015
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     This is 1 of 2012 approved meteorites from Morocco (plus 35 unapproved names) (plus 1 impact crater)

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