[meteorite-list] L, H what?
From: ROCKS ON FIRE <meteorites_at_meteoritecentral.com>
Date: Thu Apr 22 10:31:11 2004 Message-ID: <406F4C6E.7080600_at_optushome.com.au> --------------090303000002040208040205 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Hello, Bernd, as a more or less silent observer of this list I off and on get the urge to put a word in. This time it is time again to thank you for your valueable contributions to the list. It is a privilege to having you back here. Again a wonderful explanation of a criterium which affects more or less all of us. Thanks again, Mate, and keep up the good work!
--
Best regards from DOWN-UNDER,
Norbert & Heike Kammel
ROCKS ON FIRE
IMCA #3420
www.rocksonfire.com <%3Fhttp://www.rocksonfire.com%3F>
bernd.pauli_at_paulinet.de wrote:
>Hello Tom and List,
>
>Yes, lab testing will probably be the only sure method to classify
>a meteorite unambiguously. My NWA 984 (LL4) slice has lots of
>easily visible FeNi metal specks, my Saint-Severin (LL6) has lots
>of FeNi specks (large and small), my Parnallee (LL3.6) is choke-full
>of metallic iron. Same thing with my Tenham (L6) or my Suizhou (L6).
>
>So "high iron" and "low iron" does not primarily refer to the visible amount
>of nickel iron in the matrix. Table 3.3 in D.W. Sears (1978) The Nature and
>Origin of Meteorites (Adam Hilger Ltd, Bristol), p. 62 has some interesting
>details:
>
>Principal minerals in chondritic meteorites (wt%) for types 5 and 6:
>
>Olivine H => 33-37 / Pyroxene => 23-27 / Kamacite (FeNi) => 15-17
>Olivine L => 45-49 / Pyroxene => 21-25 / Kamacite (FeNi) => 06-08
>Olivine LL => 56-60 / Pyroxene => 14-18 / Kamacite (FeNi) => 01-02
>
>In words:
>
>The amount of olivine increases, the amount of pyroxene decreases
>as you go from H => L => LL.
>
>But:
>
>The total amount of the low-nickel kamacite decreases from H => L => LL
>as more and more iron is "oxidized" that is: needed for the silicates.
>
>Best wishes,
>
>Bernd
>
>
>______________________________________________
>Meteorite-list mailing list
>Meteorite-list_at_meteoritecentral.com
>http://www.pairlist.net/mailman/listinfo/meteorite-list
>
>
>
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Hello, Bernd,<br>
<br>
as a more or less silent observer of this list I off and on get the urge
to put a word in.<br>
<br>
This time <b>it is time again to thank you for your valueable contributions
to the list</b>. It is a privilege to having you back here.<br>
Again a wonderful explanation of a criterium which affects more or less all
of us.<br>
<br>
Thanks again, Mate, and keep up the good work!<br>
-- <br>
<div class="moz-signature">
<meta http-equiv="content-type" content="text/html; ">
<meta name="author" content="Norbert F. Kammel">
<title>Best_regards</title>
<p><font color="#000000">Best regards from DOWN-UNDER,<br>
<br>
Norbert & Heike Kammel<br>
<b> ROCKS ON FIRE</b><br>
IMCA #3420</font><br>
<a href="%3Fhttp://www.rocksonfire.com%3F">www.rocksonfire.com</a> <br>
<img
src="http://images.andale.com/f2/113/103/4948211/1028507254564_logosmallerGIF.gif"
alt="" width="140" height="85">
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<br>
<br>
<a class="moz-txt-link-abbreviated" href="mailto:bernd.pauli_at_paulinet.de">bernd.pauli@paulinet.de</a> wrote:<br>
<blockquote type="cite" cite="midDIIE.0000003900001DB3_at_paulinet.de">
<pre wrap="">Hello Tom and List,
Yes, lab testing will probably be the only sure method to classify
a meteorite unambiguously. My NWA 984 (LL4) slice has lots of
easily visible FeNi metal specks, my Saint-Severin (LL6) has lots
of FeNi specks (large and small), my Parnallee (LL3.6) is choke-full
of metallic iron. Same thing with my Tenham (L6) or my Suizhou (L6).
So "high iron" and "low iron" does not primarily refer to the visible amount
of nickel iron in the matrix. Table 3.3 in D.W. Sears (1978) The Nature and
Origin of Meteorites (Adam Hilger Ltd, Bristol), p. 62 has some interesting
details:
Principal minerals in chondritic meteorites (wt%) for types 5 and 6:
Olivine H => 33-37 / Pyroxene => 23-27 / Kamacite (FeNi) => 15-17
Olivine L => 45-49 / Pyroxene => 21-25 / Kamacite (FeNi) => 06-08
Olivine LL => 56-60 / Pyroxene => 14-18 / Kamacite (FeNi) => 01-02
In words:
The amount of olivine increases, the amount of pyroxene decreases
as you go from H => L => LL.
But:
The total amount of the low-nickel kamacite decreases from H => L => LL
as more and more iron is "oxidized" that is: needed for the silicates.
Best wishes,
Bernd
______________________________________________
Meteorite-list mailing list
<a class="moz-txt-link-abbreviated" href="mailto:Meteorite-list_at_meteoritecentral.com">Meteorite-list@meteoritecentral.com</a>
<a class="moz-txt-link-freetext" href="http://www.pairlist.net/mailman/listinfo/meteorite-list">http://www.pairlist.net/mailman/listinfo/meteorite-list</a>
</pre>
</blockquote>
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Received on Sat 03 Apr 2004 06:44:46 PM PST
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