Fabric transpositions in granite plutons - an insight from non-scaled analogue modelling

0337771 - GFÚ 2011 RIV IN eng J - Journal Article
Kratinová, Zuzana - Machek, Matěj - Kusbach, V.
Fabric transpositions in granite plutons - an insight from non-scaled analogue modelling.
Journal of the Geological Society of India. Roč. 75, č. 1 (2010), s. 267-277. ISSN 0016-7622. E-ISSN 0974-6889
R&D Projects: GA AV ČR KJB300120702
Institutional research plan: CEZ:AV0Z30120515
Keywords : analogue modelling * magmatic fabrics * granite intrusions * rheology * AMS
Subject RIV: DB - Geology ; Mineralogy
Impact factor: 0.396, year: 2010

Investigations on a set of experimental models of highly viscous intrusions were carried out in order to study the internal strain pattern during vertical ascent and emplacement of granite intrusions. The strain pattern was determined by means of anisotropy of magnetic susceptibility resulting from the orientation of magnetite particles in a liquid plaster medium. The modelled intrusions show distinct fabrics reflecting the flow of a rheologically complex, non-Newtonian material. During the vertical growth of the intrusion, constrictional vertical fabrics are transposed into flattening fabrics, and along with the development of low-intensity fabric domains are passively transported upwards. Vertical growth takes place along subvertical thrust shear zones that satisfactorily explain the discordant magmatic fabrics in granites along intrusion sides.
Permanent Link: http://hdl.handle.net/11104/0181695