Magmatic evolution of compositionally heterogeneous monogenetic Cenozoic Strzelin Volcanic Field (Fore-Sudetic Block, SW Poland)

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00025798%3A_____%2F16%3A00000184" target="_blank" >RIV/00025798:_____/16:00000184 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.jgeosci.org/content/jgeosci.221_awdankiewicz.pdf" target="_blank" >http://www.jgeosci.org/content/jgeosci.221_awdankiewicz.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3190/jgeosci.221" target="_blank" >10.3190/jgeosci.221</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Magmatic evolution of compositionally heterogeneous monogenetic Cenozoic Strzelin Volcanic Field (Fore-Sudetic Block, SW Poland)

Popis výsledku v původním jazyce

Erosional remnants of the Miocene Strzelin Volcanic Field in SW Poland were studied in terms of volcanology, petrology and Sr–Nd–Pb isotope geochemistry with the aim to identify the reasons for compositional variability of monogenetic volcanoes. The obtained data suggest that a heterogeneous mantle peridotite (with mixed DM/HIMU signature) was the dominant source of magmas. Partial melting and segregation of magmas in diapirically rising asthenosphere occurred within the garnet stability field. The source heterogeneity was the basic cause that controlled the compositional variability of the primary magmas, and also influenced the subsequent differentiation processes and eruptive styles. On the surface, additional role was played by variable environments (i.e. phreatomagmatic eruptions in water-saturated environments). More fertile mantle domains, with prevailing HIMU component, released melts deeper, at lower degrees of partial melting and small magma batches were formed. These nephelinitic magmas underwent only limited fractional crystallization en route to the surface and erupted with low explosivity as lava flows. In contrast, less fertile mantle domains, dominated by the DM component, released melts at higher degrees of partial melting at a shallower depth. This resulted in a more sustained magma supply that further enhanced the development of shallow-level magmatic systems, with more advanced and complex differentiation: larger degrees of fractional crystallization as well as replenishment by new batches of primitive magma. The resulting basaltic and trachybasaltic volcanoes showed a greater diversity of eruptive styles, including effusive and variably explosive eruptions.

Název v anglickém jazyce

Magmatic evolution of compositionally heterogeneous monogenetic Cenozoic Strzelin Volcanic Field (Fore-Sudetic Block, SW Poland)

Popis výsledku anglicky

Erosional remnants of the Miocene Strzelin Volcanic Field in SW Poland were studied in terms of volcanology, petrology and Sr–Nd–Pb isotope geochemistry with the aim to identify the reasons for compositional variability of monogenetic volcanoes. The obtained data suggest that a heterogeneous mantle peridotite (with mixed DM/HIMU signature) was the dominant source of magmas. Partial melting and segregation of magmas in diapirically rising asthenosphere occurred within the garnet stability field. The source heterogeneity was the basic cause that controlled the compositional variability of the primary magmas, and also influenced the subsequent differentiation processes and eruptive styles. On the surface, additional role was played by variable environments (i.e. phreatomagmatic eruptions in water-saturated environments). More fertile mantle domains, with prevailing HIMU component, released melts deeper, at lower degrees of partial melting and small magma batches were formed. These nephelinitic magmas underwent only limited fractional crystallization en route to the surface and erupted with low explosivity as lava flows. In contrast, less fertile mantle domains, dominated by the DM component, released melts at higher degrees of partial melting at a shallower depth. This resulted in a more sustained magma supply that further enhanced the development of shallow-level magmatic systems, with more advanced and complex differentiation: larger degrees of fractional crystallization as well as replenishment by new batches of primitive magma. The resulting basaltic and trachybasaltic volcanoes showed a greater diversity of eruptive styles, including effusive and variably explosive eruptions.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

DB - Geologie a mineralogie

OECD FORD obor

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Projekt

<a href="/cs/project/GAP210%2F12%2F1990" target="_blank" >GAP210/12/1990: Kontinentální litosféra jako zdroj diferencovaných alkalických láv a genetická role bazických magmat vymezení pomocí vulkanismu oherského příkopu</a><br>

Návaznosti

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

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název periodika

Journal of Geosciences

ISSN

1802-6222

e-ISSN

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Svazek periodika

61

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

26

Strana od-do

425-450

Kód UT WoS článku

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EID výsledku v databázi Scopus

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