[meteorite-list] Chassigny Chondrules

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From: Treiman, Allan <Treiman_at_meteoritecentral.com>
Date: Thu Apr 22 10:21:10 2004
Message-ID: <9CBE44BF7DE9D511960300500424D7D0112D23_at_cassnt2>

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Hi, all.

   Chassigny contains no chondrules. It does have spherical and ellipsoidal
inclusions in its olivine crystals. The inclusions contain silica-rich
glass,
pryoxene sprays, amphibole, whitlockite, and biotite. Their textures look a
bit like chondrules, but that only represents the same physical conditions:
rapid cooling of silicate magma.
   Several papers in the technical literature have nice photos of these
magmatic
inclusions: 1) Floran et al., 1978, Geochim. Cosmochim. Acta 42, 1213-1229.
2) Johnson et al., 1991, Geochim. Cosmochim. Acta 55, 349-366.

   The idea of chondrules in Chassigny dates back at least to 1962, in the
paper Jeremine E., Orcel J., and Sandrea A. (1962) Etude mineralogique
et structurale de la meteorite de Chassigny. Bull. Soc. fr. Mineral. Crist.
LXXXV, 262-266. They showed pictures of the magmatic inclusions, and
(apparently thinking only of chondrite meteorites, and not 'normal'
igneous rocks) called them "chondre naissant."

   Cheers

  Allan

Allan H. Treiman
Senior Staff Scientist
Lunar and Planetary Institute
3600 Bay Area Boulevard
Houston, TX 77058-1113
   281-486-2117
   281-486-2162 (FAX)
-----Original Message-----
From: mark ford [mailto:markf_at_ssl.gb.com]
Sent: Monday, July 28, 2003 9:43 AM
To: meteorite-list_at_meteoritecentral.com
Subject: [meteorite-list] Chassigny Chondrules

Hi,

Does anyone know what the current thinking on the 'Chassigny Chondrules' is?
- (as to what they actually are or how they formed?)

I found this, but can anyone point me in the direction of any further
information?

http://www.geocities.com/~dweir/chassig1.htm
<http://www.geocities.com/~dweir/chassig1.htm>

Cheers
Mark F.

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<DIV><SPAN class=3D680493615-28072003><FONT face=3DArial =
color=3D#0000ff size=3D2>Hi,=20
all.</FONT></SPAN></DIV>
<DIV><SPAN class=3D680493615-28072003><FONT face=3DArial =
color=3D#0000ff=20
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D680493615-28072003><FONT face=3DArial =
color=3D#0000ff=20
size=3D2>   Chassigny contains no chondrules. It does =
have=20
spherical and ellipsoidal</FONT></SPAN></DIV>
<DIV><SPAN class=3D680493615-28072003><FONT face=3DArial =
color=3D#0000ff=20
size=3D2>inclusions in its olivine crystals. The inclusions contain =
silica-rich=20
glass, </FONT></SPAN></DIV>
<DIV><SPAN class=3D680493615-28072003><FONT face=3DArial =
color=3D#0000ff=20
size=3D2>pryoxene sprays, amphibole, whitlockite, and biotite. Their =
textures look=20
a </FONT></SPAN></DIV>
<DIV><SPAN class=3D680493615-28072003><FONT face=3DArial =
color=3D#0000ff size=3D2>bit=20
like chondrules, but that only represents the same physical=20
conditions:</FONT></SPAN></DIV>
<DIV><SPAN class=3D680493615-28072003><FONT face=3DArial =
color=3D#0000ff size=3D2>rapid=20
cooling of silicate magma. </FONT></SPAN></DIV>
<DIV><SPAN class=3D680493615-28072003><FONT face=3DArial =
color=3D#0000ff=20
size=3D2>   Several papers in the technical literature have =
nice photos=20
of these magmatic </FONT></SPAN></DIV>
<DIV><SPAN class=3D680493615-28072003><FONT face=3DArial =
color=3D#0000ff=20
size=3D2>inclusions: 1) Floran et al., 1978, Geochim. Cosmochim. Acta =
42,=20
1213-1229.</FONT></SPAN></DIV>
<DIV><SPAN class=3D680493615-28072003><FONT face=3DArial =
color=3D#0000ff size=3D2>2)=20
Johnson et al., 1991, Geochim. Cosmochim. Acta 55, =
349-366.</FONT></SPAN></DIV>
<DIV><SPAN class=3D680493615-28072003><FONT face=3DArial =
color=3D#0000ff=20
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D680493615-28072003><FONT face=3DArial =
color=3D#0000ff=20
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D680493615-28072003><FONT face=3DArial =
color=3D#0000ff=20
size=3D2>   The idea of chondrules in Chassigny dates back at =
least to=20
1962, in the </FONT></SPAN></DIV>
<DIV><SPAN class=3D680493615-28072003><FONT face=3DArial =
color=3D#0000ff size=3D2>paper=20
Jeremine E., Orcel J., and Sandrea A. (1962) Etude=20
mineralogique</FONT></SPAN></DIV>
<DIV><SPAN class=3D680493615-28072003><FONT face=3DArial =
color=3D#0000ff size=3D2>et=20
structurale de la meteorite de Chassigny. Bull. Soc. fr. Mineral. =
Crist.=20
</FONT></SPAN></DIV>
<DIV><SPAN class=3D680493615-28072003><FONT face=3DArial =
color=3D#0000ff size=3D2>LXXXV,=20
262-266. They showed pictures of the magmatic inclusions, and=20
</FONT></SPAN></DIV>
<DIV><SPAN class=3D680493615-28072003><FONT face=3DArial =
color=3D#0000ff=20
size=3D2>(apparently thinking only of chondrite meteorites, and not=20
'normal'</FONT></SPAN></DIV>
<DIV><SPAN class=3D680493615-28072003><FONT face=3DArial =
color=3D#0000ff=20
size=3D2>igneous rocks) called them "chondre =
naissant."</FONT></SPAN></DIV>
<DIV><SPAN class=3D680493615-28072003><FONT face=3DArial =
color=3D#0000ff=20
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D680493615-28072003><FONT face=3DArial =
color=3D#0000ff=20
size=3D2>   Cheers</FONT></SPAN></DIV>
<DIV><SPAN class=3D680493615-28072003><FONT face=3DArial =
color=3D#0000ff=20
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D680493615-28072003><FONT face=3DArial =
color=3D#0000ff size=3D2> =20
Allan</FONT></SPAN></DIV></DIV>
<DIV> </DIV>
<P><FONT face=3DArial size=3D2>Allan H. Treiman</FONT> <BR><FONT =
face=3DArial=20
size=3D2>Senior Staff Scientist</FONT> <BR><FONT face=3DArial =
size=3D2>Lunar and=20
Planetary Institute</FONT> <BR><FONT face=3DArial size=3D2>3600 Bay =
Area=20
Boulevard</FONT> <BR><FONT face=3DArial size=3D2>Houston, TX =
77058-1113</FONT>=20
<BR><FONT face=3DArial size=3D2>   281-486-2117</FONT> =
<BR><FONT=20
face=3DArial size=3D2>   281-486-2162 (FAX)</FONT> </P>
<BLOCKQUOTE dir=3Dltr style=3D"MARGIN-RIGHT: 0px">
  <DIV class=3DOutlookMessageHeader dir=3Dltr align=3Dleft><FONT =
face=3DTahoma=20
  size=3D2>-----Original Message-----<BR><B>From:</B> mark ford=20
  [mailto:markf_at_ssl.gb.com]<BR><B>Sent:</B> Monday, July 28, 2003 9:43=20
  AM<BR><B>To:</B> =
meteorite-list_at_meteoritecentral.com<BR><B>Subject:</B>=20
  [meteorite-list] Chassigny Chondrules<BR><BR></FONT></DIV>
  <DIV class=3DSection1>
  <P class=3DMsoPlainText><FONT face=3D"Courier New" size=3D2><SPAN=20
  style=3D"FONT-SIZE: 10pt"><o:p> </o:p></SPAN></FONT></P>
  <P class=3DMsoPlainText><FONT face=3D"Courier New" size=3D2><SPAN=20
  style=3D"FONT-SIZE: 10pt"><o:p> </o:p></SPAN></FONT></P>
  <P class=3DMsoPlainText><FONT face=3D"Courier New" size=3D2><SPAN=20
  style=3D"FONT-SIZE: 10pt"><o:p> </o:p></SPAN></FONT></P>
  <P class=3DMsoPlainText><FONT face=3D"Courier New" size=3D2><SPAN=20
  style=3D"FONT-SIZE: 10pt">Hi, <o:p></o:p></SPAN></FONT></P>
  <P class=3DMsoPlainText><FONT face=3D"Courier New" size=3D2><SPAN=20
  style=3D"FONT-SIZE: 10pt"><o:p> </o:p></SPAN></FONT></P>
  <P class=3DMsoPlainText><FONT face=3D"Courier New" size=3D2><SPAN=20
  style=3D"FONT-SIZE: 10pt">Does anyone know what the current thinking =
on the=20
  ‘Chassigny Chondrules’ is?<SPAN style=3D"mso-spacerun: =
yes">  </SPAN><SPAN=20
  class=3DGramE>- (as to what they actually are or how they=20
  formed?)</SPAN><o:p></o:p></SPAN></FONT></P>
  <P class=3DMsoPlainText><FONT face=3D"Courier New" size=3D2><SPAN=20
  style=3D"FONT-SIZE: 10pt"><o:p> </o:p></SPAN></FONT></P>
  <P class=3DMsoPlainText><FONT face=3D"Courier New" size=3D2><SPAN=20
  style=3D"FONT-SIZE: 10pt">I found this, but can anyone point me in =
the direction=20
  of any further information?<o:p></o:p></SPAN></FONT></P>
  <P class=3DMsoPlainText><FONT face=3D"Courier New" size=3D2><SPAN=20
  style=3D"FONT-SIZE: 10pt"><o:p> </o:p></SPAN></FONT></P>
  <P class=3DMsoPlainText><FONT face=3D"Courier New" size=3D2><SPAN=20
  style=3D"FONT-SIZE: 10pt"><A=20
  =
href=3D"http://www.geocities.com/~dweir/chassig1.htm">http://www.geociti=
es.com/~dweir/chassig1.htm</A><o:p></o:p></SPAN></FONT></P>
  <P class=3DMsoPlainText><FONT face=3D"Courier New" size=3D2><SPAN=20
  style=3D"FONT-SIZE: 10pt"><o:p> </o:p></SPAN></FONT></P>
  <P class=3DMsoPlainText><FONT face=3D"Courier New" size=3D2><SPAN=20
  style=3D"FONT-SIZE: 10pt"><o:p> </o:p></SPAN></FONT></P>
  <P class=3DMsoPlainText><FONT face=3D"Courier New" size=3D2><SPAN=20
  style=3D"FONT-SIZE: 10pt">Cheers<o:p></o:p></SPAN></FONT></P>
  <P class=3DMsoPlainText><FONT face=3D"Courier New" size=3D2><SPAN=20
  style=3D"FONT-SIZE: 10pt">Mark F.<o:p></o:p></SPAN></FONT></P>
  <P class=3DMsoPlainText><FONT face=3D"Courier New" size=3D2><SPAN=20
  style=3D"FONT-SIZE: =
10pt"><o:p> </o:p></SPAN></FONT></P></DIV></BLOCKQUOTE></BODY></HTM=
L>

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Received on Mon 28 Jul 2003 11:49:08 AM PDT

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