Metamorphic inheritance of Rheic passive margin evolution and its early Variscan overprint in the Teplá-Barrandian Unit, Bohemian Massif

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00025798%3A_____%2F17%3A00000026" target="_blank" >RIV/00025798:_____/17:00000026 - isvavai.cz</a>

Alternative codes found

RIV/00216208:11310/17:10359016

Result on the web

<a href="http://onlinelibrary.wiley.com/doi/10.1111/jmg.12234/abstract" target="_blank" >http://onlinelibrary.wiley.com/doi/10.1111/jmg.12234/abstract</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1111/jmg.12234" target="_blank" >10.1111/jmg.12234</a>

Result language

angličtina

Original language name

Metamorphic inheritance of Rheic passive margin evolution and its early Variscan overprint in the Teplá-Barrandian Unit, Bohemian Massif

Original language description

Rift-related regional metamorphism of passive margins is usually difficult to observe on the surface, mainly due to its strong metamorphic overprint during the subsequent orogenic processes that cause its exposure. metamorphic petrology, P–T modelling, structural geology and in-situ U-Pb monazite geochronology using laser-ablation split-stream inductively coupled plasma mass spectrometry, was applied to unravel the polyphase tectono-metamorphic record of metapelites at the western margin of the Teplá-Barrandian domain. The oldest event M1 is LP–HT regional metamorphism with a geothermal gradient between 30 and 50°C km-1, peak temperatures up to 650°C and of Cambro-Ordovician age (c. 485 Ma). The M1 event was followed by M2-D2, which is characterized by a Barrovian sequence of minerals from biotite to kyanite and a geothermal gradient of 20–25°C km-1. D2-M2 is associated with a vertical fabric S2, and was dated as Devonian (c. 375 Ma). Finally, the vertical fabric S2 was overprinted by a D3-M3 event that formed sillimanite- to chlorite- bearing gently inclined fabric S3 also of Devonian age. The high geothermal gradient of the M1 event is due to an extensional, rift-related tectonic setting. The subsequent Devonian evolution is interpreted as horizontal shortening of the passive margin at the beginning of Variscan convergence, followed by detachment-accommodated exhumation of lower-crustal rocks. Both Devonian shortening and detachment occurred in the upper plate of a Devonian subduction zone. The tectonic evolution presented in this paper modifies previous models of the tectonic history of the western margin of the Teplá-Barrandian domain, and also put constraints on the evolution of the southern margin of the Rheic ocean from the passive margin formation to the early phases of Variscan orogeny.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10505 - Geology

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

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

Publication year

2017

Confidentiality

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

Name of the periodical

Journal of Metamorphic Geology

ISSN

0263-4929

e-ISSN

—

Volume of the periodical

35

Issue of the periodical within the volume

3

Country of publishing house

GB - UNITED KINGDOM

Number of pages

28

Pages from-to

327-355

UT code for WoS article

000396743100004

EID of the result in the Scopus database

2-s2.0-85008252509