Geochemical and mechanical interactions within sheet-like granite intrusion during stress-field changeover (Moldanubian Batholith; Central European Variscides)

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F23%3A10477294" target="_blank" >RIV/00216208:11310/23:10477294 - isvavai.cz</a>

Alternative codes found

RIV/00025798:_____/23:10168724

Result on the web

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=UHhVM7S1BS" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=UHhVM7S1BS</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.lithos.2023.107358" target="_blank" >10.1016/j.lithos.2023.107358</a>

Result language

angličtina

Original language name

Geochemical and mechanical interactions within sheet-like granite intrusion during stress-field changeover (Moldanubian Batholith; Central European Variscides)

Original language description

Late-orogenic granitoids carry unique geochemical and structural evidence of post-collisional exhumation, commonly associated with decompression melting, mixing and mingling of individual magma pulses and differentiation. The Weinsberg Type Granitoids (WTG) forming the 313.6 Ma Kaplice Sheet and 322 Ma Hojna Voda Sheet (northwestern Weinsberg Composite Pluton) have geochemical signature that demonstrates the substantial role played by the partial melting of metasedimentary sequences and the magmatic fractionation of K-feldspar, plagioclase and biotite during magma ascent and emplacement. The composition of highly peraluminous WTG were partly modified by the assimilation of host metasedimentary xenoliths. The textures of the WTG are characterised by straight crystal size distribution (CSD) consistent with in-situ crystallization and crystal/melt separation, forming abundant K-feldspar phenocryst-rich domains (KPD). The KPD were formed by redistribution of K-feldspar phenocrysts (crystal accumulation) in a suspension during magma movement followed by interstitial melt extraction and escape from the highly crystallised mush. The multiple fabric pattern within the Kaplice Sheet is the result of changeover of local stress field by varying increment of regional stress conditions and buoyancy forces at the time of magma ascent and emplacement. The steeply dipping foliation (M1) reflects the magma flow with the increment of regional stress-field (ENE-WSW oriented extension). The superimposition of flat-lying foliation (M2) with abundant particle accumulations (i.e. K-feldspar phenocrysts, enclaves and host rock xenoliths) were associated with (a) increasing buoyancy force in ascending magma above the rate of the regional stress field or (b) collapse of ascending magma after the decreasing the buoyancy force resulting in the mush moving down.

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

<a href="/en/project/GF15-34621L" target="_blank" >GF15-34621L: Post-collisional plutonism in the south-western Bohemian Massif</a><br>

Continuities

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

Publication year

2023

Confidentiality

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

Name of the periodical

Lithos

ISSN

0024-4937

e-ISSN

1872-6143

Volume of the periodical

458–459

Issue of the periodical within the volume

November

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

18

Pages from-to

107358

UT code for WoS article

001082227700001

EID of the result in the Scopus database

2-s2.0-85171589635