Hi Cris,
> Are you sure? In my computer it triggered the Norton AntiVirus which
> identified copies of something called Win95MTX (I do not remember the
exact
> name; I am still shivering) in many files under C:\windows
I'm 100% sure that I didn't receive anything resembling any virus. It was
a two part message, part one is text/plain and the second is text/html.
Standard format for Outlook Express 5. I've inserted the decoded text at
the bottom of this message to asuage any doubts. There is no Javascript,
DirectX or actually anything which isn't just a text email message.
My mail server may have stripped an attachment if it thought it was
infected, but there's no sign of any message to this effect in the body or
headers of the message.
Cheers,
Andrew
=====Part 1=====
Dear Dr. Mayer,
There is a calculated fractionation factor by me for the siderite-water
system in Geochem. J. 33:109-126 (1999), but it is essentially identical
to the experimental data of Carothers et al. (1988).
The large variation in d13C but a constant d18O value for your siderite
may result from a large variation in sedimentary environment (particularly
CO2 input), whereas the oxygen isotope ratios of carbonate is
predominantly governed by H2O which is of a great amount relative to CO2.
Sincerely,
Yong-Fei Zheng
**************************************************************************
**********
Dr. Yong-Fei Zheng
Professor and Chairman
Department of Earth and Space Sciences
University of Science and Technology of China
Hefei 230026, PR China
Tel.: (+86) 551 3603384 Fax: (+86) 551 3603554
Email: [log in to unmask]
**************************************************************************
**********
----- Original Message -----
发件人: Bernhard Mayer
收件人: [log in to unmask]
发送时间: 2000年11月14日 6:23
主题: Oxygen isotope ratios of siderite
Dear colleagues:
Is there anything known about the temperature dependence of the
equilibrium
isotope exchange between oxygen in water and oxygen in siderite (FeCO3)?
I
consulted Friedman & O'Neil (1977) without success.
Background: I have recently analyzed the carbon and oxygen isotope
ratios of
siderites from laminated lake sediments of early Holocene age. The
siderites
are believed to be a primary formation under reducing conditions at the
water/sediment interface of a Fe-rich, Ca-poor freshwater lake. The
shifts
in carbon isotope ratios of the siderites from the lake sediment
sequence
agree nicely with known climatic and paleoenvironmental changes at the
time.
However, the oxygen isotope ratios in the siderites do not.
Any suggestions would be welcome.
Cheers,
Bernhard
Bernhard Mayer
Associate Professor
University of Calgary
Departments of Physics and Astronomy
and Geology and Geophysics
2500 University Drive NW
Calgary, Alberta
Canada T2N 1N4
phone (403) 220-5389
fax (403) 220-7773
e-mail: [log in to unmask]
=====Part 2=====
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META content="text/html; charset=gb2312" http-equiv=Content-Type>
<META content="MSHTML 5.00.2919.6307" name=GENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY bgColor=#ffffff>
<DIV><FONT face="Times New Roman" size=4>Dear Dr. Mayer,</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face="Times New Roman" size=4>There is a calculated
fractionation
factor by me for the siderite-water system in Geochem. J. 33:109-126
(1999), but
it is essentially identical to the experimental data of Carothers et al.
(1988).
</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face="Times New Roman" size=4>The large variation in
d13C but a
constant d18O value for your siderite may result from a large variation in
sedimentary environment (particularly CO2 input), whereas the oxygen
isotope
ratios of carbonate is predominantly governed by H2O which is of a great
amount
relative to CO2.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face="Times New Roman" size=4>Sincerely,</FONT></DIV>
<DIV><FONT face="Times New Roman" size=4>Yong-Fei Zheng</FONT></DIV>
<DIV> </DIV>
<DIV>*********************************************************************
***************<BR>Dr.
Yong-Fei Zheng<BR>Professor and Chairman<BR>Department of Earth and Space
Sciences<BR>University of Science and Technology of China<BR>Hefei 230026,
PR
China<BR>Tel.: (+86) 551 3603384
Fax:
(+86) 551 3603554<BR>Email: <A
href="mailto:[log in to unmask]">[log in to unmask]</A><BR>*************
***********************************************************************</D
IV>
<DIV> </DIV>
<DIV> </DIV>
<BLOCKQUOTE
style="BORDER-LEFT: #000000 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT:
0px; PADDING-LEFT: 5px; PADDING-RIGHT: 0px">
<DIV style="FONT: 10pt 宋体">----- Original Message ----- </DIV>
<DIV style="BACKGROUND: #e4e4e4; FONT: 10pt 宋体; font-color:
black"><B>发件人:</B>
<A href="mailto:[log in to unmask]"
[log in to unmask]>Bernhard Mayer</A> </DIV>
<DIV style="FONT: 10pt 宋体"><B>收件人:</B> <A
href="mailto:[log in to unmask]"
[log in to unmask]>[log in to unmask]</A> </DIV>
<DIV style="FONT: 10pt 宋体"><B>发送时间:</B> 2000年11月14日 6:23</DIV>
<DIV style="FONT: 10pt 宋体"><B>主题:</B> Oxygen isotope ratios of
siderite</DIV>
<DIV><BR></DIV>Dear colleagues:<BR><BR>Is there anything known about the
temperature dependence of the equilibrium<BR>isotope exchange between
oxygen
in water and oxygen in siderite (FeCO3)? I<BR>consulted Friedman &
O'Neil
(1977) without success.<BR><BR>Background: I have recently analyzed the
carbon
and oxygen isotope ratios of<BR>siderites from laminated lake sediments
of
early Holocene age. The siderites<BR>are believed to be a primary
formation
under reducing conditions at the<BR>water/sediment interface of a
Fe-rich,
Ca-poor freshwater lake. The shifts<BR>in carbon isotope ratios of the
siderites from the lake sediment sequence<BR>agree nicely with known
climatic
and paleoenvironmental changes at the time.<BR>However, the oxygen
isotope
ratios in the siderites do not.<BR><BR>Any suggestions would be
welcome.<BR><BR>Cheers,<BR><BR>Bernhard<BR><BR>Bernhard
Mayer<BR>Associate
Professor<BR>University of Calgary<BR>Departments of Physics and
Astronomy<BR>and Geology and Geophysics<BR>2500 University Drive
NW<BR>Calgary, Alberta<BR>Canada T2N 1N4<BR>phone (403) 220-5389<BR>fax
(403)
220-7773<BR>e-mail: <A
href="mailto:[log in to unmask]">[log in to unmask]
a</A><BR></BLOCKQUOTE></BODY></HTML>
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