Emplacement and thermal effect of post-collisional Chewo Pluton (Arabian-Nubian Shield); implication for late East-African Orogeny

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F20%3A10408716" target="_blank" >RIV/00216208:11310/20:10408716 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/67985831:_____/20:00518642 RIV/00025798:_____/20:00000019

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=xji08u8NmA" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=xji08u8NmA</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jafrearsci.2019.103695" target="_blank" >10.1016/j.jafrearsci.2019.103695</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Emplacement and thermal effect of post-collisional Chewo Pluton (Arabian-Nubian Shield); implication for late East-African Orogeny

Popis výsledku v původním jazyce

The Chewo pluton built by pyroxene-amphibole to amphibole-biotite monzodiorite and quartz monzonite is a typical post-collisional intrusive body emplaced into a low-grade Neoproterozoic Tambien Group belonging to the Tokar-Barka Terrane in the southern Arabian-Nubian Shield. The pluton shows a high-K calc-alkaline and metaluminous composition with significant enrichment in both LREE and LILE due to hybridization and magma mixing between crustal and mantle-derived melts. Estimated P-T conditions of quartz monzonite magma solidification at T: 703 +/- 23 degrees C and P: 0.32 +/- 0.08 GPa and thermal overprint in the pluton aureole at T: -200-755 degrees C and P: 0.28 +/- 0.06 GPa indicate that the Chewo pluton intruded at a depth of between ca. 10-13 km. The Chewo Pluton was emplaced diapirically, which was driven by a local extension in the hinge of the large-scale asymmetric syncline during the last increments of regional deformation - orogen-perpendicular WNW(NW)-ESE(SE) compression. It indicates that the regional WNW(NW)-ESE(SE) shortening is the main geodynamic event of the East African Orogen in the upper-crustal Tokar-Barka Terrane resulting in the assembly of the eastern and western Gondwana continents. In concordance, the zircon U/Pb age of the Chewo pluton (618.1 +/- 1.5 Ma) provides the upper limit for the regional deformation.

Název v anglickém jazyce

Emplacement and thermal effect of post-collisional Chewo Pluton (Arabian-Nubian Shield); implication for late East-African Orogeny

Popis výsledku anglicky

The Chewo pluton built by pyroxene-amphibole to amphibole-biotite monzodiorite and quartz monzonite is a typical post-collisional intrusive body emplaced into a low-grade Neoproterozoic Tambien Group belonging to the Tokar-Barka Terrane in the southern Arabian-Nubian Shield. The pluton shows a high-K calc-alkaline and metaluminous composition with significant enrichment in both LREE and LILE due to hybridization and magma mixing between crustal and mantle-derived melts. Estimated P-T conditions of quartz monzonite magma solidification at T: 703 +/- 23 degrees C and P: 0.32 +/- 0.08 GPa and thermal overprint in the pluton aureole at T: -200-755 degrees C and P: 0.28 +/- 0.06 GPa indicate that the Chewo pluton intruded at a depth of between ca. 10-13 km. The Chewo Pluton was emplaced diapirically, which was driven by a local extension in the hinge of the large-scale asymmetric syncline during the last increments of regional deformation - orogen-perpendicular WNW(NW)-ESE(SE) compression. It indicates that the regional WNW(NW)-ESE(SE) shortening is the main geodynamic event of the East African Orogen in the upper-crustal Tokar-Barka Terrane resulting in the assembly of the eastern and western Gondwana continents. In concordance, the zircon U/Pb age of the Chewo pluton (618.1 +/- 1.5 Ma) provides the upper limit for the regional deformation.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10505 - Geology

Projekt

<a href="/cs/project/GF15-34621L" target="_blank" >GF15-34621L: Postkolizní plutonická aktivita v jihozápadní části Českého masivu</a><br>

Návaznosti

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

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název periodika

Journal of African Earth Sciences

ISSN

1464-343X

e-ISSN

—

Svazek periodika

162

Číslo periodika v rámci svazku

Únor 2020

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

17

Strana od-do

103695

Kód UT WoS článku

000509618000021

EID výsledku v databázi Scopus

2-s2.0-85075783173