Chloritoid-staurolite assemblages in central Perthshire
نویسندگان
چکیده
منابع مشابه
Phase relations and reaction histories of chloritoid-free and chloritoid-bearing metapelites from the Mahneshan area, NW Iran
Mineral assemblages, reaction textures and mineral composition of the metapelitic rocks from the Mahneshan area in NW Iran are studied to reconstruct the reaction history of the rocks. The phase relation on the real mineral chemistry AFM, AFMn compatibility diagrams and mineral isograds in chloritoid-free and chloritoid-bearing metapelites of Mahneshan Complex were studied in order to determine...
متن کاملThe staurolite enigma solved.
Staurolite has been long considered an enigma because of its remarkable pseudosymmetry and the frequent twinning. Staurolite gives two twins whose occurrence frequency seems to contradict the condition of lattice restoration requested by the reticular theory of twinning, in that the more frequent one (Saint Andrews cross twin) has a twin index of 12, whereas the less frequent one (Greek cross t...
متن کاملعوامل موثر بر حضور یا عدم حضور کانی کلریتوئید در سنگ‌های رسی دگرگون شده‌ی مناطق بلند پرچین و پشتوک
Microstructural and petrographical features as well as field relations, show that formation of the metapelitic rocks of Bolandparchin and Poshtuk in northwestern Iran was poly-metamorphic. Mineral assemblages in the metapelites of two areas are different. The Bolandparchin schists are graphite-rich and have dark color. Peak metamorphic assemblage is garnet, biotite, staurolite, aluminosilicate ...
متن کاملDistribution of Fe and Mg between garnet and biotite in Scottish Barrovian metamorphic zones
The distribution coefficient KD=(Mg / Fe)garnet/(Mg/Fe)biotite has been calculated for eight garnet-biotite pairs from rocks ranging from the garnet isograd to the staurolite zone along the Stonehaven coast of NE Scotland. This distribution coefficient depends upon metamorphic temperature and is not dependent upon the Mn and Ca content of garnet. Garnet-biotite geothermometer yields temperature...
متن کاملFish assemblages and habitat ecology of River Pinder in central Himalaya, India
Snow-fed River Pinder -a tributary of River Alaknanda in central Himalaya was explored for fish assemblages and habitat specificity. Altogether 27 fish species were reported from three orders, four families and nine genera. Cypriniformes order was dominating followed by Siluriformes and Salmoniformes. Shannon-Weiner diversity index (3.09 to 4.10) and Simpson index of diversity (0.81 to 0.92) of...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Geological Magazine
سال: 1980
ISSN: 0016-7568,1469-5081
DOI: 10.1017/s0016756800028971