Pregled bibliografske jedinice broj: 66423
Crystallochemical investigation of augite from basaltic andesite from Donje Jesenje (Hrvatsko Zagorje, Croatia)
Crystallochemical investigation of augite from basaltic andesite from Donje Jesenje (Hrvatsko Zagorje, Croatia) // Ninth Slovenian-Croatian Crystallographic Meeting, Book of abstracts / Ivan Leban (ur.).
Ljubljana: Slovenska Akademija, 2000. (predavanje, nije recenziran, sažetak, znanstveni)
CROSBI ID: 66423 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
Crystallochemical investigation of augite from basaltic andesite from Donje Jesenje (Hrvatsko Zagorje, Croatia)
Autori
Tibljaš, Darko ; Oršulić, Dalibor ; Šćavničar, Stjepan
Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni
Izvornik
Ninth Slovenian-Croatian Crystallographic Meeting, Book of abstracts
/ Ivan Leban - Ljubljana : Slovenska Akademija, 2000
Skup
Ninth Slovenian-Croatian Crystallographic Meeting
Mjesto i datum
Gozd Martuljek, Slovenija, 15.07.2000. - 17.07.2000
Vrsta sudjelovanja
Predavanje
Vrsta recenzije
Nije recenziran
Ključne riječi
augite; basaltic andesite; Donje Jesenje; Hrvatsko Zagorje; Croatia
Sažetak
In the north-western part of Croatia several smaller bodies of volcanic rocks have been reported and one of these is in the vicinity of the village Donje Jesenje where samples of basaltic andesite have been found. In thin sections this rock show porphyritic to glomeroporphyritic textures with phenocrysts of clinopyroxene and plagioclase. Crystallochemical characteristics of clinopyroxenes depends on petrology of the host rock, so crystallochemical data obtained experimentally could provide useful information on conditions of their crystallization. Crystal chemistry of pyroxene from Donje Jesenje was studied combining X-ray diffraction and Rietveld structural refinement with an electron microprobe analysis. According to the results of chemical analysis investigated clinopyroxene is augite having formula (Na0.02Ca0.79Mn0.01Fe2+0.19Mg0.92Ti0.01Fe3+0.01Al0.05)VI (Si1.94Al0.06)IVO6. Based on discrimination diagrams its chemical composition corresponds to the composition of clinopyroxenes from orogenic basalts. Rietveld refinement was performed by GSAS software. The monoclinic structure (C2/c) with lattice constants a=9.744(1) Ĺ, b=8.918(1) Ĺ, c=5.262(2) Ĺ, b=106.45(1)°, V=438.53Ĺ3 was refined to Rp=0.0591 and Rwp=0.0762. Interatomic distances as well as M1 site volume indicate that augite crystallized at low-pressure (less than 10 kbar).
Izvorni jezik
Engleski
Znanstvena područja
Geologija
