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001-es BibID:	BIBFORM081459
Első szerző:	Csámer Árpád (geológus)
Cím:	Interaction between a Late Miocene andesitic dyke swarm and wet sediment in the Szoros Valley, Eastern Borsod Basin, Northeast Hungary / Árpád Csámer
Dátum:	2015
ISSN:	1788-2281 1789-3348
Megjegyzések:	Magma/wet sediment interaction (e.g. autobrecciation, magma-sediment mingling, hyaloclastite and peperite-forming, etc.) is a common phenomenon, where hot magma intrudes into unconsolidated or poorly consolidated water saturated sediment. In the Eastern Borsod Basin (NE-Hungary) relatively small (2-30 m) subvolcanic bodies, sills and dykes with contact lithofacies zones were found generated by mechanical stress and quenching of the magma, and interacting with unconsolidated wet andesitic lapilli-tuff and tuff-breccia. Close to the contact between sediment and intrusions, thermal and mechanical effects may occur in the host sediment. Hydrothermal alteration and stratification of the host sediment were developed only locally along the contact zone, probably due to the paleo-hydrogeologic and paleo-rheological inhomogeneities of the lapilli-tuff-tuff-breccia deposits. Processes of magma/wet sediment interaction may be difficult to recognize because of limited exposure and/or certain similarities of the brecciated intrusions to the characteristics of the host sediment; hence detailed field work (geologic mapping or profiling) was required to demonstrate the subvolcanic origin of the brecciated andesite bodies.
Tárgyszavak:	Természettudományok Földtudományok idegen nyelvű folyóiratközlemény hazai lapban folyóiratcikk andesite dyke magma/wet sediment interaction contact lithofacies peperite
Megjelenés:	Central European Geology. - 58 : 3 (2015), p. 246-267. -
Internet cím:	DOI Intézményi repozitóriumban (DEA) tárolt változat
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001-es BibID:	BIBFORM081462
Első szerző:	Gucsik Arnold
Cím:	Non-luminescent nature of the planar deformation features in shocked quartz from the Ries impact structure, Germany : a new interpretation / Arnold Gucsik, Tasuku Okumura, Hirotsugu Nishido, Ildikó Gyollai, Kiyotaka Ninagawa, Natalie Deseta, Péter Rózsa
Dátum:	2015
ISSN:	1788-2281 1789-3348
Megjegyzések:	Quartz grains from the Ries impact structure containing shock-induced microstructures were investigated using Scanning Electron Microscopy in cathodoluminescence (SEM-CL), secondary electron (SEM-SE) and back-scattered electron (SEM-BSE) modes as well as Mott?Seitz analysis. The purpose of this study is to evaluate the mechanism by which CL detects Planar Deformation Features (PDFs) in quartz, which is one of the most important indicators of shock metamorphism in rock-forming minerals. PDFs are micron-scale features not easily identified using optical microscopy or scanning electron microscopy. The CL spectrum of PDFs in quartz that has suffered relatively high shock pressure shows no or a relatively weak emission band at around 385 nm, whereas an emission band with a maximum near 650 nm is observed independent of shock pressure. Thus, the ~385 nm intensity in shocked quartz demonstrates a tendency to decrease with increasing shock metamorphic stage, whereas the 650 nm band remains fairly constant. The result indicates that the emission band at 385 nm is related to the deformed structure of quartz as PDFs.
Tárgyszavak:	Természettudományok Földtudományok idegen nyelvű folyóiratközlemény hazai lapban folyóiratcikk planar deformation features cathodoluminescence shock waves quartz meteorite crater
Megjelenés:	Central European Geology. - 58 : 3 (2015), p. 217-229. -
További szerzők:	Okumura, Tasuku Nishido, Hirotsugu Gyollai Ildikó Ninagawa, Kiyotaka Deseta, Natalie Rózsa Péter (1956-) (petrográfus)
Internet cím:	DOI Intézményi repozitóriumban (DEA) tárolt változat
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