Authors:Ildikó Gyollai, Ildikó Gyollai, Szaniszló Bérczi, Krisztián Fintor, Szabolcs Nagy, and Arnold Gucsik
The Mócs chondrite was studied by optical microscopy, element mapping, as well as scanning electron microscope backscattered electron (SEM—BSE) imaging, in order to gain a better understanding of the thermal metamorphic as well as post-shock annealing evolution and the mineralogical signatures in this meteorite. The studied thin section of Mócs meteorite contains 26 chondrules with a variety of chondrule textures, which are characterized by a blurry rim. The chondrules mostly consist of pyroxene and olivine, whereas feldspars occur only in the recrystallized groundmass, chondrule mesostasis, and mineral melt inside and beyond the shock veins. It was found that the matrix was completely recrystallized. According to the scanning electron microscope and optical microscope observations mentioned above, it can be concluded that the Mócs chondrite is a 6.5 petrographic type.
Authors:Gergely Dabi, Ferenc Tóth, and Félix Schubert
petrography are also recognized, due to the recrystallization of the studied sample inherited from mylonitization, which is probably ubiquitous in the study area.
MZ (Ófalu Group)
The MZ is a
Authors:Ágnes Skultéti, Tivadar M. Tóth, István János Kovács, Edit Király, and Judit Sándorné Kovács
garnets in deformed aplite. Szederkényi ( 1977 , 1983 ) described intensive shearing at greenschist/amphibolite facies in amphibolite, whereas M. Tóth et al. ( 2005 ) assumed the recrystallization temperature of mylonite to be approximately 350 °C. The
Authors:Máté Zsigmond Leskó, Richárd Zoltán Papp, Boglárka Anna Topa, Ferenc Kristály, Tamás Vigh, and Norbert Zajzon
contained “tripoli.” Tripoli is pure recrystallized quartz, of a crumbly nature, which appears randomly within the footwall. Tripoli can be found in mm-dm-sized lenses. It does not dissolve in acetic acid, so the amount of tripoli is added to the common
grains are strongly sutured, recrystallized and appear in bands elongated parallel to the S2 foliation. In some samples, kyanite inclusions are embedded in recrystallized quartz ribbons. Several feldspar grains are sub-grained. The mantles of asymmetric
Authors:Attila Demény, Alexandra Németh, Zoltán Kern, György Czuppon, Mihály Molnár, Szabolcs Leél-Őssy, Mihály Óvári, and József Stieber
be observed, even macroscopically (Figs 4C and 5I ). Along the bands, micrite was partially recrystallized into microsparite.
The lamination in this stalagmite is quite different compared to the other three samples: each lamina couplet
Authors:Máté Zsigmond Leskó, Richárd Zoltán Papp, Ferenc Kristály, József Pálfy, and Norbert Zajzon
42 m/m%. According to the SEM observations, most of the SiO 2 content is related to biogenic silica derived from fossils with siliceous skeleton ( Fig. 6 ), although the siliceous microfossils are strongly recrystallized. Fig. 6. SEM-BSE images from
Authors:Ildikó Gyollai, Ákos Kereszturi, Zsolt Kereszty, Máté Szabó, and Elias Chatzitheodoridis
olivine grains varies between 5 and 200 μm; in recrystallized glassy chondrules, they are usually around 5 μm in diameter. Olivine clasts in shock veins and those in the melt pockets are 20–30 μm in size; whereas in chondrules, there are many 50- to 150-μm
Authors:János Haas, Tamás Budai, István Dunkl, Éva Farics, Sándor Józsa, Szilvia Kövér, Annette E. Götz, Olga Piros, and Péter Szeitz
recrystallization of the previously formed dolomite phases to coarser crystal size in the vicinity of fault zones. These dolomite-forming processes must have taken place prior to the late Eocene, since all of the above-described rock types appear in the Eocene basal
Authors:Edina Prondvai, Gábor Botfalvai, Koen Stein, Zoltán Szentesi, and Attila Ősi
are of biological (pathological) origin or result from taphonomic and diagenetic recrystallization events ( Moreno-Azanza et al. 2016 ).
Based on its microstructural characteristics, MT I represents a dinosaurian eggshell