|
Roll Overs:
1
2
3
4
5
6
|
|
|
Copyright (c) Paul Swartz. All rights reserved.
|
1227 grams. 18 x 12 1 cm. Iron, IAB Complex
Fall not observed. Found 1925 (main mass found 2002) near Patos de Minas, Minas Gerais state, Brazil.
Paul writes:
The MetBul lists two Patos de Minas:
an Iron, IAB complex octahedrite with TKW 200 kg
an Iron, IIAB hexahedrite with TKW 32 kg
Wikipedia, an unimpeachable source of information, states
After etching, hexahedrites do not display a Widmanstätten pattern, but they often do show Neumann lines: parallel lines that cross each other at various angles, and are indicative of impact shock on the parent body.
I'm not seeing any Widmanstätten pattern in these pictures, so I presume it is a slice of the hexahedrite.
Visit my Web Site |
Click to view larger photos
#1
#2
#3
#4
#5
#6
|
Found at the arrow (green or red) on the map below
|
|
| |
Anne Black
9/4/2014 1:17:57 PM |
Paul, look at pic. 2, that is your W. pattern. Yes, it is an odd one, but pretty. (the pretty face of that slice). ;-) |
Greg Lindh
9/4/2014 11:24:46 AM |
Beautiful meteorite and great job of photography! |
Paul Swartz
9/4/2014 11:06:31 AM |
ANDREAS - it may be the LEAST stable iron. Please see this day on the MPOD.
ROBERT - I know not what the copper-looking bits are. My suspicion is 'cobre de patos de minas', technically known as 'rust'.
ANNE - Yes, you did warn me. Many times. But it's such a beautiful meteorite. Ah well, I'm not the first man to be treated badly by a pretty face :) Are you impeaching Wikipedia? I want my Widmanst*tten pattern!! |
gourgues Denis
9/4/2014 7:01:20 AM |
Surprising structure....like a little flowers..very unique specimens...the structure outside is a unbeliable trained of cubic mosaic (fusion crust)...thanks Paul !!! I knew not this meteorite !!! *''''''. |
Andreas Koppelt
9/4/2014 3:17:26 AM |
Troilite flowers on pic #3! |
Robert Verish
9/4/2014 2:22:23 AM |
Excellent photos. This is some of the best details of an edge that I've ever seen on my handheld.
Thanks for posting.
Am I seeing small grains of metallic copper in the last two photos or is that just the reflection off of specular sulfides? |
Anne Black
9/4/2014 2:14:33 AM |
This is a slice of the Octahedrite IAB, a 200 kilos mass found in 2002. It is interesting-looking because of all those large troilite inclusions, like eyes. But, you are right Andreas, it is not a stable iron. (Sorry Paul, but I did warn you). |
Andreas Koppelt
9/4/2014 1:34:32 AM |
Whow, what a nice etch-pattern. But it seems not to be the most stable iron? |
| |