Fwd: Re: Fwd: Re: [meteorite-list] New Member - A couple of weeks will tell.

From: Mark Jackson <b0rtz2003_at_meteoritecentral.com>
Date: Thu Apr 22 10:13:09 2004
Message-ID: <20030425003639.53680.qmail_at_web41711.mail.yahoo.com>

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I have accepted the generous proposal of a member working with the University of Japan and I will send them pristine samples of all materials. Drum roll please . . . Thanks for all the feedback guys. Mark

"E.L. Jones" <jonee_at_epix.net> wrote:I missed the beginning of this thread but there are a couple of usages I
saw which I wanted to bring up.

"K/T" boundary means Cretaceous/Triassic boundary and there is ONLY one.
Iridium is found in some places within that boundary. I don't know
off- the-top of my head where other iridium concentrations are but, I
know they exist. Volcanic eruptions eject a lot of Ir as well.

I don't see a mechanism for the Chicxulub event to produce concentrated
Ir nuggets, as Ir is not concentrated in the parent body that we know
of. Concentration would be in a molten state and is more likely to
occur deeply in an impact zone such as the Sudbury Area./ I agree with
Dave, there are many astroblemes yet to be uncovered--One was just
announced this week in Missouri.

The use of the term "strewn field" while seemingly descriptive, isn't
the regular usage of the term, as it implies something different
including a surveyed distribution and calculated elipse. Not that then
use is wrong but could be misleading until backed up by data. Another
term which might describe your find might be "occurance"

Playing the devil's advocate I would question the conclusion that this
is a Chicxulub related event. IT is a good question to pose but as I
read you don't yet have lab work with the chemistry yet.

Good Luck in your research,
Elton




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<DIV>
<BLOCKQUOTE style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid">
<DIV>I have accepted the generous proposal of a member working with the University of Japan and I will send them pristine samples of all materials. Drum roll please . . . </DIV>
<DIV>&nbsp;</DIV>
<DIV>Thanks for all the feedback guys.</DIV>
<DIV>&nbsp;</DIV>
<DIV>Mark<BR><BR><B><I>"E.L. Jones" &lt;jonee_at_epix.net&gt;</I></B> wrote:</DIV>
<BLOCKQUOTE style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid">I missed the beginning of this thread but there are a couple of usages I <BR>saw which I wanted to bring up.<BR><BR>"K/T" boundary means Cretaceous/Triassic boundary and there is ONLY one. <BR>Iridium is found in some places within that boundary. I don't know <BR>off- the-top of my head where other iridium concentrations are but, I <BR>know they exist. Volcanic eruptions eject a lot of Ir as well.<BR><BR>I don't see a mechanism for the Chicxulub event to produce concentrated <BR>Ir nuggets, as Ir is not concentrated in the parent body that we know <BR>of. Concentration would be in a molten state and is more likely to <BR>occur deeply in an impact zone such as the Sudbury Area./ I agree with <BR>Dave, there are many astroblemes yet to be uncovered--One was just <BR>announced this week in Missouri.<BR><BR>The use of the term "strewn field" while seemingly descriptive, isn't <BR>the regular usage of the term, as it implies s
omething different <BR>including a surveyed distribution and calculated elipse. Not that then <BR>use is wrong but could be misleading until backed up by data. Another <BR>term which might describe your find might be "occurance"<BR><BR>Playing the devil's advocate I would question the conclusion that this <BR>is a Chicxulub related event. IT is a good question to pose but as I <BR>read you don't yet have lab work with the chemistry yet.<BR><BR>Good Luck in your research,<BR>Elton<BR><BR></BLOCKQUOTE>
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Received on Thu 24 Apr 2003 08:36:39 PM PDT