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Sat, 20 Jun 1998 17:48:15 -0700 |
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University of Science and Technology of China |
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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
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