[meteorite-list] Tanezrouft 57 - Acfer 329

From: meteoriteshow <meteoriteshow_at_meteoritecentral.com>
Date: Thu Apr 22 10:28:33 2004
Message-ID: <000001c39757$5323a620$93664152_at_monordinateur>

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Bonjour the List !

I propose the first beautiful 2mm thin slices of Tanezrouft 57 (C4 =
anomalous) plus another one showing many inclusions and 2 clasts, and =
some nice shock veined slices of Acfer 329 (L4/5 - W0). Have a look at =
them :
http://meteoriteshow.free.fr/meteoriteshow%20fra/pages%20navigation/piece=
s_en_vente-fra.html

Here are some details :
  a.. Tanezrouft 057 - 3.5g - Euros 380.00 (with a beautiful CAI)
  b.. Tanezrouft 057 - 3.8g - Euros 420.00 (nice chondrules and CAIs)
  c.. Tanezrouft 057 - 55.6g - Euros 3330.00 (2 different kinds of dark =
inclusions, many small CAIs, 2 clasts : a real dream !)
  d.. ACfer 329 - 5.2g - Euros 30.00 (shock veined)
  e.. ACfer 329 - 6.6g - Euros 40.00 (shock veined)
  f.. ACfer 329 - 13.9g - Euros 70.00 (shock veined)
Do not hesitate to send us an e-mail for further details. All our =
meteorites come with Certificate of Authenticity, and shipment is for =
free from 100 Euro orders.

Best Meteoritical Wishes.

Frederic & Christophe
www.meteoriteshow.com

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CLASSIFICATION :

Tanezrouft 057 25=B016'N-0=B009'E
Algeria
Found 2002 December 23
Carbonaceous chondrite (C4)
A large (5.4 kg), dark grey, moderately compact stone, lacking fusion =
crust was found by F. Beroud and C Boucher.
Mineralogy and classification (B. Devouard and J.L. Devidal, UBP ; B. =
Zanda and M. Denise, MNHNP).
Large chondrules (around 1 mm in diameter); matrix around 50% but =
locally more abundant (~70%), numerous irregular whitish
inclusions up to 3 mm, and occasional zoned CAls up to 17 mm. In =
addition, several large (up lo 2.5 cm} dark grey
inclusions, show a finer grained petrology, with no (or extremely rare} =
chondrules or CAIs. More of these fine-grained inclusions are visible at =
the surface of the hand sample. The meteorite is nearly equilibrated : =
olivines are around Fa30=B14 except for a few un-equilibrated chondrules =
; OPX range from Fs3 to Fs30, with a mean at Fs19. The groundmass is =
highly re-crystallized, with homogeneous olivine, orthopyroxene and =
plagioclase grains around 100 =B5m in size. The groundmass is texturally =
equilibrated ; although most grains seem to be porous. Magnetite is the =
dominant opaque mineral, associated with minor FeS, Ni-rich monsulfide, =
minor pentlandite and possibly pyrite. Outside chondrules, small =
magnetite grains and minute sulfide grains are scattered within the =
matrix. No metal was observed. However, iron hydroxides patches are =
visible, and metal or sulfides may be have been obliterated by =
terrestrial weathering. The numerous irregular inclusions retain a =
line-grained texture made of plagioclase and clinopyroxene that may be =
metamorphosed CAls. The overall characteristics of this meteorite are =
consistent with a C4 classification, with affinities to the CV oxidized =
subgroup and/or the CK group.
Specimens : type specimen, 110 g, MNHNP : main mass with finders


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<BODY bgColor=3D#ffffff>
<DIV><FONT face=3DArial size=3D2>
<DIV><FONT face=3D"Courier New" size=3D2>Bonjour the List !</FONT></DIV>
<DIV><FONT face=3D"Courier New" size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3D"Courier New" size=3D2>I propose the =
first&nbsp;beautiful=20
2mm&nbsp;thin slices of Tanezrouft 57&nbsp;(C4 anomalous)&nbsp;plus =
another one=20
showing many inclusions and 2 clasts, and some nice shock veined slices =
of Acfer=20
329 (L4/5 - W0). Have a look at them :</FONT></DIV>
<DIV><A=20
href=3D"http://meteoriteshow.free.fr/meteoriteshow fra/pages =
navigation/pieces_en_vente-fra.html"><FONT=20
face=3D"Courier New"=20
size=3D2>http://meteoriteshow.free.fr/meteoriteshow%20fra/pages%20navigat=
ion/pieces_en_vente-fra.html</FONT></A></DIV>
<DIV><FONT face=3D"Courier New" size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3D"Courier New" size=3D2>Here are&nbsp;some details =
:</FONT></DIV>
<UL>
  <LI><FONT face=3D"Courier New" size=3D2>Tanezrouft 057 - 3.5g - Euros =
380.00 (with=20
  a beautiful CAI)</FONT></LI>
  <LI><FONT face=3D"Courier New" size=3D2>Tanezrouft 057 - 3.8g - Euros =
420.00 (nice=20
  chondrules and CAIs)</FONT></LI>
  <LI><FONT face=3D"Courier New" size=3D2>Tanezrouft 057 - 55.6g - Euros =
3330.00 (2=20
  different kinds of dark inclusions, many small CAIs, 2 clasts : a real =
dream=20
  !)</FONT></LI>
  <LI><FONT face=3D"Courier New" size=3D2>ACfer 329 - 5.2g - Euros 30.00 =
(shock=20
  veined)</FONT></LI>
  <LI><FONT face=3D"Courier New" size=3D2>ACfer 329 - 6.6g - Euros 40.00 =
(shock=20
  veined)</FONT></LI>
  <LI><FONT face=3D"Courier New" size=3D2>ACfer 329 - 13.9g - Euros =
70.00 (shock=20
  veined)</FONT></LI></UL>
<DIV><FONT face=3D"Courier New" size=3D2>Do not hesitate to send us an =
e-mail for=20
further details. All our meteorites come with Certificate of =
Authenticity, and=20
shipment is for free from 100 Euro orders.<BR><BR>Best Meteoritical=20
Wishes.<BR><BR>Frederic &amp; Christophe<BR></FONT><A=20
href=3D"http://www.meteoriteshow.com"><FONT face=3D"Courier New"=20
size=3D2>www.meteoriteshow.com</FONT></A></DIV>
<DIV>
<HR>
</DIV>
<DIV><FONT face=3D"Courier New" size=3D2><FONT face=3D"Times New Roman"=20
size=3D3></FONT><SPAN>
<P class=3DMsoNormal style=3D"mso-layout-grid-align: none"=20
align=3Dcenter><SPAN><STRONG><U>CLASSIFICATION :</U></STRONG></SPAN></P>
<P class=3DMsoNormal style=3D"mso-layout-grid-align: =
none"><SPAN><STRONG>Tanezrouft=20
057<SPAN=20
style=3D"mso-spacerun: =
yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=20
</SPAN>25=B016&#8217;N-0=B009&#8217;E<BR></STRONG></SPAN><SPAN =
lang=3DEN-GB=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-ansi-language: =
EN-GB; mso-bidi-font-size: 14.0pt">Algeria<BR></SPAN><SPAN=20
lang=3DEN-GB=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-ansi-language: =
EN-GB; mso-bidi-font-size: 14.0pt">Found=20
2002 December 23<BR></SPAN><SPAN lang=3DEN-GB=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-ansi-language: =
EN-GB; mso-bidi-font-size: 14.0pt">Carbonaceous=20
chondrite (C4)<BR></SPAN><SPAN lang=3DEN-GB=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-ansi-language: =
EN-GB; mso-bidi-font-size: 14.0pt">A=20
large (5.4 kg), dark grey, moderately compact stone, </SPAN><SPAN =
lang=3DEN-GB=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-ansi-language: =
EN-GB; mso-bidi-font-size: 14.0pt">lacking=20
fusion crust was found by F. Beroud and C Boucher.<BR></SPAN><SPAN =
lang=3DEN-GB=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-ansi-language: =
EN-GB; mso-bidi-font-size: 14.0pt">Mineralogy=20
and classification (B. Devouard and J.L. </SPAN><SPAN lang=3DEN-GB=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-ansi-language: =
EN-GB; mso-bidi-font-size: 14.0pt">Devidal,=20
<I>UBP</I> ; B. Zanda and M. Denise, <EM>MNHNP).<BR></EM>Large =
</SPAN><SPAN=20
lang=3DEN-GB=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-ansi-language: =
EN-GB; mso-bidi-font-size: 14.0pt">chondrules=20
(around 1 mm in diameter); matrix around 50% but </SPAN><SPAN =
lang=3DEN-GB=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-ansi-language: =
EN-GB; mso-bidi-font-size: 14.0pt">locally=20
more abundant (~70%), numerous irregular whitish<BR></SPAN><SPAN =
lang=3DEN-GB=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-ansi-language: =
EN-GB; mso-bidi-font-size: 14.0pt">inclusions=20
up to 3 mm, and occasional zoned CAls up to </SPAN><SPAN lang=3DEN-GB=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-ansi-language: =
EN-GB; mso-bidi-font-size: 14.0pt">17=20
mm. In addition, several large (up lo 2.5 cm} dark grey<BR></SPAN><SPAN=20
lang=3DEN-GB=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-ansi-language: =
EN-GB; mso-bidi-font-size: 14.0pt">inclusions,=20
show a finer grained petrology, with no (or </SPAN><SPAN lang=3DEN-GB=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-ansi-language: =
EN-GB; mso-bidi-font-size: 14.0pt">extremely=20
rare} chondrules or CAIs. More of these fine-</SPAN><SPAN lang=3DEN-GB=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-ansi-language: =
EN-GB; mso-bidi-font-size: 14.0pt">grained=20
inclusions are visible at the surface of the hand </SPAN><SPAN =
lang=3DEN-GB=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-ansi-language: =
EN-GB; mso-bidi-font-size: 14.0pt">sample.=20
The meteorite is nearly equilibrated : olivines are </SPAN><SPAN =
lang=3DEN-GB=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-ansi-language: =
EN-GB; mso-bidi-font-size: 14.0pt">around=20
Fa30=B14 except for a few un-equilibrated chondrules ; </SPAN><SPAN =
lang=3DEN-GB=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-ansi-language: =
EN-GB; mso-bidi-font-size: 14.0pt">OPX=20
range from Fs3 to Fs30, with a mean at Fs19. The </SPAN><SPAN =
lang=3DEN-GB=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-ansi-language: =
EN-GB; mso-bidi-font-size: 14.0pt">groundmass=20
is highly re-crystallized, with homogeneous </SPAN><SPAN lang=3DEN-GB=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-ansi-language: =
EN-GB; mso-bidi-font-size: 14.0pt">olivine,=20
orthopyroxene and plagioclase grains around 100 =B5m </SPAN><SPAN =
lang=3DEN-GB=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-ansi-language: =
EN-GB; mso-bidi-font-size: 14.0pt">in=20
size<I>.</I> The groundmass is texturally equilibrated ; although =
</SPAN><SPAN=20
lang=3DEN-GB=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-ansi-language: =
EN-GB; mso-bidi-font-size: 14.0pt">most=20
grains seem to be porous. Magnetite is the dominant </SPAN><SPAN =
lang=3DEN-GB=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-ansi-language: =
EN-GB; mso-bidi-font-size: 14.0pt">opaque=20
mineral, associated with minor FeS, Ni-rich </SPAN><SPAN lang=3DEN-GB=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-ansi-language: =
EN-GB; mso-bidi-font-size: 14.0pt">monsulfide,=20
minor pentlandite and possibly pyrite. Outside </SPAN><SPAN lang=3DEN-GB =

style=3D"FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-ansi-language: =
EN-GB; mso-bidi-font-size: 14.0pt">chondrules,=20
small magnetite grains and minute sulfide grains </SPAN><SPAN =
lang=3DEN-GB=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-ansi-language: =
EN-GB; mso-bidi-font-size: 14.0pt">are=20
scattered within the matrix. No metal&nbsp;was<SPAN=20
style=3D"FONT-VARIANT: small-caps"> </SPAN>observed. </SPAN><SPAN =
lang=3DEN-GB=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-ansi-language: =
EN-GB; mso-bidi-font-size: 14.0pt">However,=20
iron hydroxides patches are visible, and metal or </SPAN><SPAN =
lang=3DEN-GB=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-ansi-language: =
EN-GB; mso-bidi-font-size: 14.0pt">sulfides=20
may be have been obliterated by terrestrial </SPAN><SPAN lang=3DEN-GB=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-ansi-language: =
EN-GB; mso-bidi-font-size: 14.0pt">weathering.=20
The numerous irregular inclusions retain a line-</SPAN><SPAN =
lang=3DEN-GB=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-ansi-language: =
EN-GB; mso-bidi-font-size: 14.0pt">grained=20
texture made of plagioclase and clinopyroxene that </SPAN><SPAN =
lang=3DEN-GB=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-ansi-language: =
EN-GB; mso-bidi-font-size: 14.0pt">may=20
be metamorphosed CAls. The overall characteristics of </SPAN><SPAN =
lang=3DEN-GB=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-ansi-language: =
EN-GB; mso-bidi-font-size: 14.0pt">this=20
meteorite are consistent with a C4 classification, with </SPAN><SPAN =
lang=3DEN-GB=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-ansi-language: =
EN-GB; mso-bidi-font-size: 14.0pt">affinities=20
to the CV oxidized subgroup and/or the CK group.<BR></SPAN><SPAN =
lang=3DEN-GB=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-ansi-language: =
EN-GB; mso-bidi-font-size: 14.0pt">Specimens=20
: type specimen, 110 g, <I>MNHNP :</I> main mass with </SPAN><SPAN =
lang=3DEN-GB=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-ansi-language: =
EN-GB; mso-bidi-font-size: =
14.0pt">finders</SPAN></SPAN></FONT></P></DIV></FONT></DIV></BODY></HTML>=


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Received on Mon 20 Oct 2003 05:46:24 PM PDT


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