Greg,
Guess I owe you a milkshake............
I thought you were asking what type of environment (i.e. from an external
source)
might cause a stoney to change color over time. In other words, to cause
redoximorphic features. We see this a lot in my line of work. So, I assume
it must happen to stoneys as well, over time. I did not understand you were
asking about existing-material colorations. MY BAD : o (
May I recommend Cold Stone or Baskin Robbins......... : o }
Jon Dongell
ICMA 3922
----- Original Message -----
From: "Michael Gilmer" <[email protected]>
To: "Thunder Stone" <[email protected]>
Cc: <[email protected]>
Sent: Wednesday, March 30, 2011 9:20 AM
Subject: Re: [meteorite-list] Color of OC's by Staining or by Trace Elements
Hi Greg and List,
Great question Greg. I'm curious to hear what the experts have to say.
Some OC's start out as white or light-grey - like some LL6 types.
That is why some LL6 meteorites are mistaken for lunars or eucrites -
because they lack chondrules and have that whitish color.
Best regards,
MikeG
----------------------------------------------------------------------
Mike Gilmer - Galactic Stone & Ironworks Meteorites
Website - http://www.galactic-stone.com
Facebook - http://www.facebook.com/galacticstone
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EOM - http://www.encyclopedia-of-meteorites.com/collection.aspx?id=1564
-----------------------------------------------------------------------
On 3/30/11, Thunder Stone <[email protected]> wrote:
Hi List:
I hope everyone is well.
I have a question regarding the 'color' of OC's through staining by some
mineral influx or by oxidation. It appears most fresh OC's start out as
a
light beige or tan color; then through time the metal rusts and they
often
turn yellowish, orange, or brownish - this make sense. My questions is
this:
What other colors can they become, blue or green? What element(s) result
in
different colors? What different weathering processes are involved?
The reason I ask is because I have a weathered meteorite that is dark
green
in color; it looks like jade and I have not seen any like this one
before.
I have also and seen OC's with a 'black' color, what causes that?
Thanks,
Greg S.
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