METARIOLITI VRANICE PLANINE U PALEOZOIKU SREDIŠNJE BOSNE
Journal Title: UNKNOWN - Year 2001, Vol 13, Issue 1
Abstract
Metarioliti Vranice planine su stijene naglašene porfirne strukture u kojima se kao fenokristali nalaze kvarc, K-feldspat i vrlo rijetki albit. Osnova je mikrokristalna, karakterizirana sitnolistićastim fengitom, biotitom i područjima u kojima granofirski prorastaju kvarc i feldspati. Akcesorni minerali su ilmenit, rutil, apatit, cirkon i klorit. Metarioliti su peraluminijske stijene (PI=1,5-4,1), naglašenog kalcijskog karaktera (K2O/Na2O=1,3-13,8). Inkompatibilni elementi su vrlo obogaćeni u odnosu na prosjećni sustav hondrita, što ukazuje na krustalno porijeklo magmi metariolita. Iako se fengiti najčešće nalaze u stijenama visokog tlaka, fengiti metariolita Vranice planine najvjerojatnije pripadaju rjeđoj grupi fengita koji se nalaze u stijenama niskih do srednjih tlakova.
Authors and Affiliations
Vladimir Majer Vesnica Garašić
Keywords
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