NWA 10986 - Lunar IMB - Unusually large amount of Impact Generated Glass

Description

NWA 10986
NWA 10986
Found Sahara, 2015
Achondrite
Lunar Feldspathic Impact Melt Breccia
Specimen is a 1.72g slice
COMBINED SHIPPING : 5$ per package
NWA 10986 is described as a highland impact-melt breccia with an unusually large amount of impact-generated glass. Displays multiple generations of melting and breccia-in-breccia formation.
https://www.hou.usra.edu/meetings/lpsc2017/pdf/2220.pdf
From the Meteoritical society Database :
Northwest Africa 10986
Basic information
Name:
Northwest Africa 10986
This is an OFFICIAL meteorite name.
Abbreviation:
NWA 10986
Observed fall:
No
Year found:
2015
Country:
Western Sahara
Mass:
108.2 g
Classification
history:
Meteoritical Bulletin:
MB 105
(2016)
Lunar
Recommended:
Lunar
Comments:
Approved 17 Dec 2016
Writeup
Writeup from
MB 105:
Northwest Africa 10986
(NWA 10986)
Grarat Zawi, Western Sahara
Find: 15 Nov 2015
Classification: Lunar meteorite
Physical characteristics
: Total mass of the meteorite = 108.2 g and comprises several pieces, the larger weighing 80.5 g.
Petrography
: (S. Roberts,
UTenn
) A highland impact-melt breccia with an unusually large amount of impact-generated glass. Displays multiple generations of melting and breccia-in-breccia formation. Brown to black devitrified glass swirls encompass heavily fragmented lithic clasts and mineral fragments. Lithic clasts represent 40% of the meteorite and have been partially to completely consumed during multiple impact and melting events. Clasts are heavily brecciated and range in size from 1.4 to 0.1 mm long. The clasts are plagioclase-rich with pyroxenes, olivines, spinel, and ilmenite in ophitic to poikilitic textures. Large broken plagioclase grains and small olivines and pyroxenes are found within the matrix. Lithic types range from FANs to Hi-Mg Suite rocks.
Geochemistry
: Mineral compositions and geochemistry: Analyses were obtained from both lithic clasts and lose mineral fragments from within the breccia matrix. Plagioclase compositions average An
95.7±1.7
(N=43). Average pyroxene composition is Fs
36.6±13.3
Wo
16.4±8.2
(N=73). Average olivine composition is Fs
30.9±12.9
(N=50). Fe/Mn ratios for pyroxenes are 58.7±8.1 (N= 73) and olivines are 98.8±8.7 (N=50).
Data from:
MB105
Table 0
Line 0:
State/Prov/County:
Grarat Zawi
Origin or pseudonym:
Mahbed
Date:
15 Nov 2015
Mass (g):
108.2
Pieces:
several
Class:
Lunar
Weathering grade:
W2
Fayalite (mol%):
30.9±12.9 (N=50)
Ferrosilite (mol%):
36.6±13.3 (N=73)
Wollastonite (mol%):
16.4±8.2 (N=73)
Classifier:
L. Taylor, S. Roberts. UTenn
Type spec mass (g):
22
Type spec location:
SI
Main mass:
UTenn
Comments:
Submitted by Lawrence A. Taylor, Sarah Roberts
Institutions
and collections
SI
: Department of Mineral Sciences, NHB-119, National Museum of Natural History, Smithsonian Institution, Washington, DC 20560, United States;
Website
(institutional address; updated 16 Jan 2012)
UTenn
: Planetary Geosciences Institute, Department of Earth and Planetary Sciences, University of Tennessee, 1412 Circle Drive, Knoxville, TN 37996-1410, United States (institutional address; updated 1 Nov 2011)
Check out my
other items
!
WE COMBINE SHIPPING
Payment and Shipping
I combine shipping, means you will pay only one time the S&H fees regardless the quantity in the package. Usualy you will pay a total of 2$ for all your items put together in one, or two packages.
I accept Paypal or bank to bank transfer.
If you have any question, please contact me.