Prolonged (629–578 Ma) post-collisional syenite–monzonite magmatism on the verge of the post-orogenic period: the Arroio do Silva Pluton, southernmost Brazil

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985831%3A_____%2F25%3A00635996" target="_blank" >RIV/67985831:_____/25:00635996 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.lyellcollection.org/doi/abs/10.1144/jgs2024-195" target="_blank" >https://www.lyellcollection.org/doi/abs/10.1144/jgs2024-195</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1144/jgs2024-195" target="_blank" >10.1144/jgs2024-195</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Prolonged (629–578 Ma) post-collisional syenite–monzonite magmatism on the verge of the post-orogenic period: the Arroio do Silva Pluton, southernmost Brazil

Popis výsledku v původním jazyce

Post-collisional magmatism is reported in the northwestern portion of the Dom Feliciano Belt (DFB), southernmost Brazil. Syenite and monzonite, with subordinate diorite, along either transpressive or transtensive sites of the Passo das Canas Shear Zone, are produced for c. 50 Myr. Early syenite magmatism is emplaced at c. 640 Ma along gently or steeply dipping planes. The following period (from 629 to 578 Ma) features the Arroio do Silva Pluton (ASP) construction through an autophagic system of syenite–monzonite magmas emplaced along a transtensive stepover. Therefore, the system starts with monzonite incorporating zircon grains from the high-grade host rocks. The next syenite pulses (at 620–617 Ma) have no zircon xenocrysts but show autocrysts from the previous ones, and the same happens with the 597 and 578 Ma quartz syenite magmas. The three first ASP magmatic pulses were emplaced under extension-dominated transtension, while quartz syenites record an extensional regime. At c. 600 Ma, the conditions shifted to extensional, accommodating the last quartz syenite pulses. The Passo das Canas Shear Zone is considered a translithospheric structure that has focused transport and emplacement of magmas from the metasomatized mantle regions. The change in the deformation regime at 600 Ma marks the shift from the post-collisional to post-orogenic period.

Název v anglickém jazyce

Prolonged (629–578 Ma) post-collisional syenite–monzonite magmatism on the verge of the post-orogenic period: the Arroio do Silva Pluton, southernmost Brazil

Popis výsledku anglicky

Post-collisional magmatism is reported in the northwestern portion of the Dom Feliciano Belt (DFB), southernmost Brazil. Syenite and monzonite, with subordinate diorite, along either transpressive or transtensive sites of the Passo das Canas Shear Zone, are produced for c. 50 Myr. Early syenite magmatism is emplaced at c. 640 Ma along gently or steeply dipping planes. The following period (from 629 to 578 Ma) features the Arroio do Silva Pluton (ASP) construction through an autophagic system of syenite–monzonite magmas emplaced along a transtensive stepover. Therefore, the system starts with monzonite incorporating zircon grains from the high-grade host rocks. The next syenite pulses (at 620–617 Ma) have no zircon xenocrysts but show autocrysts from the previous ones, and the same happens with the 597 and 578 Ma quartz syenite magmas. The three first ASP magmatic pulses were emplaced under extension-dominated transtension, while quartz syenites record an extensional regime. At c. 600 Ma, the conditions shifted to extensional, accommodating the last quartz syenite pulses. The Passo das Canas Shear Zone is considered a translithospheric structure that has focused transport and emplacement of magmas from the metasomatized mantle regions. The change in the deformation regime at 600 Ma marks the shift from the post-collisional to post-orogenic period.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10505 - Geology

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Journal of the Geological Society

ISSN

0016-7649

e-ISSN

2041-479X

Svazek periodika

182

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

15

Strana od-do

jgs2024195

Kód UT WoS článku

001496078200001

EID výsledku v databázi Scopus

2-s2.0-105005181198