Magnetic fabric transposition in folded granite sills in Variscan orogenic wedge

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985530%3A_____%2F17%3A00473606" target="_blank" >RIV/67985530:_____/17:00473606 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00025798:_____/17:00000017

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.jsg.2016.11.007" target="_blank" >http://dx.doi.org/10.1016/j.jsg.2016.11.007</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jsg.2016.11.007" target="_blank" >10.1016/j.jsg.2016.11.007</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Magnetic fabric transposition in folded granite sills in Variscan orogenic wedge

Popis výsledku v původním jazyce

New approach involving evaluation of anisotropy of magnetic susceptibility (AMS) data in stereoplots and Jelinek's Pj-T space, Vollmer's eigenvalue and microstructural analyses is proposed to discriminate between homogeneous and superposed deformation in granites. This method is used to decipher the internal AMS fabric and microstructural evolution of a folded array of granitic sills. The studied major sill shows a fabric and microstructural zonality marked by submagmatic and high-temperature Type I planar-linear fabric developed at sill margins, and the transpositional Type II subsolidus fabrics that formed at high to medium temperature deformation in the sill core. While Type I fabric is associated with dip slip magnetic lineations, Type II subsolidus fabrics are marked by subhorizontal magnetic lineations striking parallel to the long axis of the sill. The structural reconstruction of the fabrics in the granite and the host rocks as well as new U-Pb zircon ages suggest coeval emplacement of horizontal and vertical sills accounting for significant weakening of the host rock magma multilayer. The model of folding of such multilayer and extrusion of residual magma parallel to axial planes is discussed with respect to structural record in other syn-contractional granite sill arrays forming sheeted plutons worldwide.

Název v anglickém jazyce

Magnetic fabric transposition in folded granite sills in Variscan orogenic wedge

Popis výsledku anglicky

New approach involving evaluation of anisotropy of magnetic susceptibility (AMS) data in stereoplots and Jelinek's Pj-T space, Vollmer's eigenvalue and microstructural analyses is proposed to discriminate between homogeneous and superposed deformation in granites. This method is used to decipher the internal AMS fabric and microstructural evolution of a folded array of granitic sills. The studied major sill shows a fabric and microstructural zonality marked by submagmatic and high-temperature Type I planar-linear fabric developed at sill margins, and the transpositional Type II subsolidus fabrics that formed at high to medium temperature deformation in the sill core. While Type I fabric is associated with dip slip magnetic lineations, Type II subsolidus fabrics are marked by subhorizontal magnetic lineations striking parallel to the long axis of the sill. The structural reconstruction of the fabrics in the granite and the host rocks as well as new U-Pb zircon ages suggest coeval emplacement of horizontal and vertical sills accounting for significant weakening of the host rock magma multilayer. The model of folding of such multilayer and extrusion of residual magma parallel to axial planes is discussed with respect to structural record in other syn-contractional granite sill arrays forming sheeted plutons worldwide.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10505 - Geology

Projekt

<a href="/cs/project/GA14-15632S" target="_blank" >GA14-15632S: Dynamika migrace tavenin a deformace hornin ve spodní kůře orogenů</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Structural Geology

ISSN

0191-8141

e-ISSN

—

Svazek periodika

94

Číslo periodika v rámci svazku

January

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

9

Strana od-do

166-183

Kód UT WoS článku

000393004500011

EID výsledku v databázi Scopus

2-s2.0-85008698682