[meteorite-list] Meteoright? -photos
From: N Lehrman <nlehrman_at_meteoritecentral.com>
Date: Thu Apr 22 10:18:03 2004 Message-ID: <00a101c3c9e3$aba544c0$33e3fea9_at_homeportal.2wire.net> This is a multi-part message in MIME format. ------=_NextPart_000_009E_01C3C9A0.9CF29600 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Doug, The metal specks in the ground surface sure look right! The strong = rusting of the exterior makes the chances of fusion crust preservation = pretty remote. Even with one of the bloody little devils in our hands, = it takes a lot of soul searching to feel "sure", but based on a fuzzy = photo, I'd bet you have a winner. =20 In the natural mineral kingdom, the only likely candidates for the = speaker magnet test are magnetite, maghemite, and pyrrhotite. The = first two are already oxides, and don't rust as in your pics. = Pyrrhotite will rust, but on a polished surface is brassy to bronzy, not = gray. Man-made stuff is another ball of worms, but your textures don't = look synthetic. Be sure and post the final "vote" tally! Cheers, Norm (http://tektitesource.com)=20 ----- Original Message -----=20 From: MexicoDoug_at_aol.com=20 To: meteorite-list_at_meteoritecentral.com=20 Sent: Tuesday, December 23, 2003 9:31 PM Subject: [meteorite-list] Meteoright? -photos http://community.webshots.com/album/106219825vellHy resend with new link above (Thanks Mark, A, L, and others who wrote me = asking for the image) OK, I have yet another try of posting photos, so this should finally = work. The following stone, basically teardrop shaped, 1 cm X 1 cm X 0.6 = cm, or 1 cm X 0.6 cm X 0.6 cm depending how you measure, weighing in the = neighborhood of 1 g was found by me in a very desertic area, in a water = runoff that probably gets rained on once a year. It sticks to my OEM = poor quality speaker magnet, and jumps up to a stronger magnet with a = click. The surface has a distinctly rusty coating, though it appears = that a blackened layer may be under. It initially leaves a light rust = colored streak on the back of a ceramic tile but that seems to stop = completely as the outer oxidation is removed. I took it to the side of = the cutting surface of a home ceramic tile cutting wheel to make a = window, which was crude, so I smoothed with sandpaper. Neither before = or after the sanding was I able to see any green crystalline evidence, = but the sanding brought out shiny metal, intersperced in a gray matrix. = Some rust remains on the window as I didn't want to shave the pebble = away. Whether there are chondrules in the face I don't know, there = appear darker spots, and I'd appreciate it if the list can tell me if = they see fusion crust, which I think I see, but...I have no reference = collectings and resident experts around. I am pretty convinced that = this one (of my 17 candidates is a meteorite, but I could be biased. 15 = of the other 16 are already eliminated. Please give me a hand on this = one. All pictures are of the same stone, at the limit of my digital = camera resolution. The true color is in between the bright and shadow = shot in Met-1. Is it? Thanks! Doug ------=_NextPart_000_009E_01C3C9A0.9CF29600 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=3DContent-Type content=3D"text/html; = charset=3Diso-8859-1"> <META content=3D"MSHTML 6.00.2800.1264" name=3DGENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=3D#ffffff> <DIV><FONT size=3D2>Doug,</FONT></DIV> <DIV><FONT size=3D2></FONT> </DIV> <DIV><FONT size=3D2>The metal specks in the ground surface sure look = right! =20 The strong rusting of the exterior makes the chances of fusion crust=20 preservation pretty remote. Even with one of the bloody little = devils in=20 our hands, it takes a lot of soul searching to feel "sure", but based on = a fuzzy=20 photo, I'd bet you have a winner. </FONT></DIV> <DIV><FONT size=3D2></FONT> </DIV> <DIV><FONT size=3D2>In the natural mineral kingdom, the only = likely=20 candidates for the speaker magnet test are magnetite, maghemite, = and=20 pyrrhotite. The first two are already oxides, and don't rust as in = your=20 pics. Pyrrhotite will rust, but on a polished surface is brassy to = bronzy,=20 not gray. Man-made stuff is another ball of worms, but your = textures don't=20 look synthetic.</FONT></DIV> <DIV><FONT size=3D2></FONT> </DIV> <DIV><FONT size=3D2>Be sure and post the final "vote" = tally!</FONT></DIV> <DIV><FONT size=3D2></FONT> </DIV> <DIV><FONT size=3D2>Cheers,</FONT></DIV> <DIV><FONT size=3D2></FONT> </DIV> <DIV><FONT size=3D2>Norm (<A=20 href=3D"http://tektitesource.com">http://tektitesource.com</A>) = </FONT></DIV> <BLOCKQUOTE=20 style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; = BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px"> <DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV> <DIV=20 style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: = black"><B>From:</B>=20 <A title=3DMexicoDoug_at_aol.com=20 href=3D"mailto:MexicoDoug_at_aol.com">MexicoDoug@aol.com</A> </DIV> <DIV style=3D"FONT: 10pt arial"><B>To:</B> <A=20 title=3Dmeteorite-list_at_meteoritecentral.com=20 = href=3D"mailto:meteorite-list_at_meteoritecentral.com">meteorite-list@meteor= itecentral.com</A>=20 </DIV> <DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Tuesday, December 23, = 2003 9:31=20 PM</DIV> <DIV style=3D"FONT: 10pt arial"><B>Subject:</B> [meteorite-list] = Meteoright?=20 -photos</DIV> <DIV><BR></DIV><FONT face=3Darial,helvetica><FONT lang=3D0 = face=3DArial size=3D2=20 FAMILY=3D"SANSSERIF" PTSIZE=3D"10"><A=20 = href=3D"http://community.webshots.com/album/106219825vellHy">http://commu= nity.webshots.com/album/106219825vellHy</A><BR><BR>resend=20 with new link above (Thanks Mark, A, L, and others who wrote me asking = for the=20 image)<BR><BR>OK, I have yet another try of posting photos, so this = should=20 finally work. The following stone, basically teardrop shaped, 1 = cm X 1=20 cm X 0.6 cm, or 1 cm X 0.6 cm X 0.6 cm depending how you measure, = weighing in=20 the neighborhood of 1 g was found by me in a very desertic area, in a = water=20 runoff that probably gets rained on once a year. It sticks to my = OEM=20 poor quality speaker magnet, and jumps up to a stronger magnet with a=20 click. The surface has a distinctly rusty coating, though it = appears=20 that a blackened layer may be under. It initially leaves a light = rust=20 colored streak on the back of a ceramic tile but that seems to stop = completely=20 as the outer oxidation is removed. I took it to the side of the = cutting=20 surface of a home ceramic tile cutting wheel to make a window, which = was=20 crude, so I smoothed with sandpaper. Neither before or after the = sanding=20 was I able to see any green crystalline evidence, but the sanding = brought out=20 shiny metal, intersperced in a gray matrix. Some rust remains on = the=20 window as I didn't want to shave the pebble away. Whether there = are=20 chondrules in the face I don't know, there appear darker spots, and = I'd=20 appreciate it if the list can tell me if they see fusion crust, which = I think=20 I see, but...I have no reference collectings and resident experts=20 around. I am pretty convinced that this one (of my 17 candidates = is a=20 meteorite, but I could be biased. 15 of the other 16 are already = eliminated. Please give me a hand on this one. All = pictures are of=20 the same stone, at the limit of my digital camera resolution. = The true=20 color is in between the bright and shadow shot in Met-1. Is = it? =20 Thanks!<BR>Doug<BR><BR></BLOCKQUOTE></FONT></FONT></BODY></HTML> ------=_NextPart_000_009E_01C3C9A0.9CF29600-- Received on Wed 24 Dec 2003 01:03:36 AM PST |
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