Sender: |
|
Date: |
Sat, 20 Jun 1998 17:48:15 -0700 |
Reply-To: |
|
Subject: |
|
MIME-Version: |
1.0 |
Content-Transfer-Encoding: |
7bit |
Content-Type: |
text/plain; charset=us-ascii |
Organization: |
University of Science and Technology of China |
From: |
|
Parts/Attachments: |
|
|
J Rougvie wrote:
>
> There is preliminary data in a paper by Giletti (Geochimica 55:1331-1343),
> but see also a discussion by Jenkin (Geology, 25: 907-910), who uses the
> Giletti activation energy but an emperical Do.
>
> -Jim Rougvie
>
> > Dear Listmembers,
> >
> >Does anybody know diffusion coefficient of Sr in micas? Any data and
> >references are welcome.
> >
> >Thank you
> >Yuri
> >
> >---------------------------------------------
> >Yuri A.Kostitsyn
> >Laboratory of Geochronology
> >and Isotope Geochemistry
> >IMGRE
> >15 Veresaeva str. Moscow 121357 Russia
> >phone/faxmodem:(095)951-3755 fax:(095)443-9043
> >---------------------------------------------
Dear Yuri and Jim,
Parameters estimates by Jenkin (1997) in Geology 25:907-910 for Sr
diffusion in muscovite significantly deviate from the common
compensation line. A better estimate for Sr diffusivity in muscovite is
E = 150 KJ/mol and Do = 3*10E-8(cm2/s). In this context, the muscovite
diffusion parameters could have different E and Do values from biotite.
Yong-Fei
--
|
|
|