Pregled bibliografske jedinice broj: 309675
Thermal alteration recorded in samples from Mt. Papuk, Croatia
Thermal alteration recorded in samples from Mt. Papuk, Croatia // EURopean Intensive Seminars of Petrology:STATE-OF-THE-ART ANALYTICAL AND IMAGING TECHNIQUES IN PETROLOGY
Pariz, Francuska, 2007. (predavanje, nije recenziran, neobjavljeni rad, znanstveni)
CROSBI ID: 309675 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
Thermal alteration recorded in samples from Mt. Papuk, Croatia
Autori
Vanja Biševac, Kadosa Balogh, Dražen Balen and Darko Tibljaš
Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, neobjavljeni rad, znanstveni
Skup
EURopean Intensive Seminars of Petrology:STATE-OF-THE-ART ANALYTICAL AND IMAGING TECHNIQUES IN PETROLOGY
Mjesto i datum
Pariz, Francuska, 20.10.2007. - 28.10.2007
Vrsta sudjelovanja
Predavanje
Vrsta recenzije
Nije recenziran
Ključne riječi
Papuk; illite; chlorite; K-Ar dating
Sažetak
K-Ar dating was performed on whole rock, <6μ m and <2μ m fractions of nine samples from Papuk Mountain located in Slavonia, the northeastern region of Croatia. This research is based on studies concerning the Radlovac metamorphic complex and the Kutjevo transect (including sedimentary rocks and Psunj metamorphic complex). The whole rock XRPD analyses yields quartz, illite-muscovite and plagioclase in all samples. Additionally, hematite, chloritoid, chlorite, K-feldspar and pyrophyllite were found in some samples. Both Kübler and Árkai index values indicate thermal alterations at 300-350°C. Total organic carbon content in investigated samples was too low for vitrinite reflectance measurements. Systematic difference observed between ages of whole rock and phyllosilicate fractions is due to prolonged formation of the clay minerals (EBERL et al., 1990). Similar age differences recorded on different size fraction have been reported from Carpathian basin by ÁRKAI et al. (1995). The prolonged clay mineral formation took place below the closure temperatures of most mineral constituents of the rock. Finer-grained fractions gave lower ages, because they contain newly formed minerals in greater proportion. The measured K-Ar age is the average value of mineral ages when whole rock samples are dated or average value of illitic minerals in a grain size range. This suggests that the oldest K-Ar ages constrain the lowest age for the metamorphic event which reset all mineral ages in the dated rock. The youngest ages (measured on <2μ m fractions) set the oldest limit for the termination of illite formation.
Izvorni jezik
Engleski
Znanstvena područja
Geologija
POVEZANOST RADA
Projekti:
119-1191155-1156 - Metamorfni i magmatski događaji u podlozi Panonskog bazena i Dinaridima (Balen, Dražen, MZOS ) ( CroRIS)
Ustanove:
Prirodoslovno-matematički fakultet, Zagreb
