On Offer: 59 gram partial slice of NWA 8061

Name: NWA 8061

Type: H 3.10 (High Metal Type 3 Ordinary Chondrite)

Description: This Type 3 H chondrite is one of only three H 3.10 chondrites known to exist. This is a 7.1 gram part slice of H3.10 NWA 8061 with some external patina and very well defined chondrules. Only ~860 grams of this meteorite have been recovered. The low TKW and low occurrence of type 3 H chondrites put this meteorite high on the collector's and researcher's wish list. Limited availability. Good luck and I hope you enjoy this meteorite as much as I do!

I offer a 100% no questions asked 15 day return policy.

ID - NWA806120170004

Northwest Africa 8061

Basic information

Name: Northwest Africa 8061
This is an OFFICIAL meteorite name.
Abbreviation: NWA 8061
Observed fall: No
Year found: 2013
Country: Morocco
Mass: 876 g

Classification
history:

Meteoritical Bulletin:	MB 102	(2014)	H3.10
Recommended:			H3.10 [explanation]

This is 1 of 3 approved meteorites classified as H3.10. [show all]
Search for other: H chondrites (type 3), H chondrites, Ordinary chondrites (type 3), and Ordinary chondrites

Comments:

Approved 5 Dec 2013

Writeup

Writeup from MB 102:

Northwest Africa 8061 (NWA 8061)

Morocco

Purchased: 2013

Classification: Ordinary chondrite (H3.10)

History: Purchased by Brahim Tahiri from a Moroccan hunter and sent to his partner Sean Tutorow for classification, 2013.

Physical characteristics: 21 fragments that fit together to form 3 matching stones. Weathered exterior, saw cuts on all fragments reveal the same reddish brown interior, with small chondrules visible.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows many distinct, porphyritic chondrules, most with glass or mesostasis, also some irregular shaped or fragmental chondrules. Apparent mean chondrule size 286±225 μm, median 200 μm, n=70. Some of the abundant iron metal appears to be oxidized a seen in the widespread oxide veining. Opaque matrix throughout. Accessory melilite, fassaite, sulfide, chromite.

Geochemistry: (C. Agee and N. Muttik, UNM) EMPA. Chondrule ferroan olivine Fa_14.9±6.2, Fe/Mn=46±24, Cr₂O₃=0.34±0.11 wt%, n=21; chondrule olivine range Fa_0.3-26.8, n=33; low Ca-pyroxene Fs_10.5±8.2Wo_1.7±1.7, Fe/Mn=25±25, n=24. (Karen Ziegler, UNM) Oxygen isotope values of 4 acid-washed aliquots of bulk sample, 1.3, 1.4, 1.4, 1.7 g, gave δ¹⁷O = 3.676, 3.040, 3.434, 3.139, δ¹⁸O = 5.521, 5.632, 6.320, 5.652, Δ¹⁷O = 0.761, 0.066, 0.097, 0.155 (linearized, all permil).

Classification: Ordinary chondrite (H3.10). Type 3.10 is based on mean Cr₂O₃ content and sigma of ferroan olivine in porphyritic chondrules using the scheme of Grossman and Brearley (2005). The sigma of 0.11 is anomalously low compared to other 3.10 ordinary chondrites, and instead resembles the mean Cr₂O₃ and sigma of Colony, Y-81020 (CO3.1), and Acfer 094 (C2-ung). Weathering W2.

Specimens: 25.1 g including a probe mount on deposit at UNM, Sean Tutorow holds the main mass.

Bibliography:

Grossman J.N. and Brearley A.J. (2005) The onset of metamorphism in ordinary and carbonaceous chondrites. Meteorit. Planet. Sci. 40, 87-122. (link)

Data from:
  MB102
  Table 0
  Line 0:

Place of purchase:	Morocco
Date:	P 2013
Mass (g):	876.22
Pieces:	21
Class:	H3.10
Fayalite (mol%):	0.3-26.8
Ferrosilite (mol%):	10.5±8.2
Wollastonite (mol%):	1.7±1.7
Classifier:	C. Agee, UNM
Type spec mass (g):	25.1
Type spec location:	UNM
Main mass:	Sean Tutorow
Comments:	Submitted by C. Agee