Print

Print
Hi Praveen,

for each of the models available in perplex there is a reference to the original paper that can be seen on the perplex webpage and in the solutions model files.  For Bi(W) the reference is White et al 2014 and the xTi value is the total Ti on the octahedral M3 site (Ti only on M3 so this equals total Ti). For the site naming schem used see Holland & Powell 2006 (JMG). Note that the Holland & Powell biotite models use an 11-oxygen biotite.

cheers,

Richard


On 11 Jan 2016, at 7:22 am, praveen singh <[log in to unmask]> wrote:

Dear members,

I would like to calculate the XTi biotite from EPMA data of biotite. I am confused about the formulation i.e. either use total Ti in octahedral site or Ti/ (Fe + Mg) which will truly corresponds to the isopleths of tbi end member of Bi(W) solution model in perplex. Please guide me with your suggestions.

 

Thanking you  


With Warm Regards,
Praveen 

Richard White
Metamorphic Geology
Institute of Geoscience
Center for Volcanoes, Atmospheres and Magmatic Open Systems (VAMOS)
Becherweg 21
University of Mainz
Mainz D-55099
Germany

Fax:  +49 6131 39 23863
Phone: +49 6131 39 24781

Web: http://www.metamorph.geo.uni-mainz.de/englisch/e_index.html
THERMOCALC web: http://www.metamorph.geo.uni-mainz.de/thermocalc/index.html