Dear Mats,
the following reference might help:
Lofgren, G. (1974). An experimental study of plagioclase crystal
morphology: isothermal crystallization. American Journal of Science, 274,
243-273.
Cheers Axel
>Content-Type: text/plain; charset="us-ascii"; format=flowed
>
>
>Listmembers,
>
>I am working on pseudotachylyte-like veins from a gabbro in the
>high-pressure zone of the Western Gneiss Region, Norway. These veins show
>fine-grained (1-100 micrometer) and highly skeletal or 'flowershaped'
>grains of grt, cpx, dol, omph, amph, and bi. Conventional
>geothermobarometry yield eclogite-facies conditions for assemblages in
>these veins.
>
>If anyone has suggestions to references concerning
>crystallization/recrystallization processes (both crystallization from a
>melt and metamorphic recrystallization) that may lead to the formation of
>highly skeletal, dendritic, or 'flowershaped' crystals, I would be very
>grateful.
>
>Many thanks, Mats.
>
>
>
>
>
>Mats G. Lund
>Mineralogical-Geological Museum,
>University of Oslo
>P.O. Box 1172 Blindern
>N-0318 Oslo, Norway
><html><div>Listmembers,</div>
><br>
><div>I am working on pseudotachylyte-like veins from a gabbro in the
>high-pressure zone of the Western Gneiss Region, Norway. These veins show
>fine-grained (1-100 micrometer) and highly skeletal or 'flowershaped'
>grains of grt, cpx, dol, omph, amph, and bi. Conventional
>geothermobarometry yield eclogite-facies conditions for assemblages in
>these veins.</div>
><br>
><div>If anyone has suggestions to references concerning
>crystallization/recrystallization processes (both crystallization from a
>melt and metamorphic recrystallization) that may lead to the formation of
>highly skeletal, dendritic, or 'flowershaped' crystals, I would be very
>grateful.</div>
><br>
><div>Many thanks, Mats.</div>
><br>
><br>
><br>
>
><br>
><br>
><font size=2 color="#000080"><b><i>Mats G.
>Lund</b></i><x-tab> </x-tab><x-tab>  
>; </x-tab><x-tab>  
>; </x-tab><x-tab>  
>; </x-tab><x-tab> </x-t
>ab><br>
>Mineralogical-Geological Museum,<br>
>University of
>Oslo<x-tab> </x-tab><x-tab> &
>nbsp; </x-tab><x-tab> &
>nbsp; </x-tab><br>
>P.O. Box 1172 Blindern<br>
>N-0318 Oslo, Norway</font></html>
Axel Brunsmann
Mineralogisches Institut
Universität Heidelberg
Im Neuenheimer Feld 236
D-69120 Heidelberg
Germany
Tel.: ++49-(0)6221-546080
Fax: ++49-(0)6221-544805
e-mail: [log in to unmask]
|