Late Archean sedimentary basins in the northeastern Superior Province, Canada: Plume-generated crustal tears or syn-convergent accretionary belts?

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985831%3A_____%2F24%3A00585108" target="_blank" >RIV/67985831:_____/24:00585108 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11310/24:10493100 RIV/00025798:_____/24:10169107

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0301926824000998?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0301926824000998?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.precamres.2024.107386" target="_blank" >10.1016/j.precamres.2024.107386</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Late Archean sedimentary basins in the northeastern Superior Province, Canada: Plume-generated crustal tears or syn-convergent accretionary belts?

Popis výsledku v původním jazyce

This study reports new U–Pb detrital zircon ages determined using the laser ablation inductively coupled plasma mass spectrometry (LA ICP-MS) from the greenstone-dominated and metasedimentary belts of the northeastern Superior Province, Qu´ebec, Canada. The U–Pb ages were obtained along a ca. 300 km long transect that traverses the Opinaca and N´emiscau belts from north to south across their strike, but also traverses supracrustal volcanosedimentary units that underlie these belts or are infolded and/or imbricated within the gneissic basement. The zircon age data, supported by trace element and Nd isotope geochemistry, point to three main sediment sources: (1) ‘old cratonic’ with ages >3 Ga (likely coming from the northerly Minto block), (2) local gneissic (TTG) basement with ages scattered at around 2.8 Ga, and (3) plutons and/or their volcanic counterparts only shortly preceding, or being broadly coeval with, the sediment deposition. The depositional ages range from 2730 ± 11 Ma to 2661 ± 11 Ma, but in most cases fall into a narrower age interval between ca. 2710 Ma and ca. 2685 Ma. In agreement with the previous detrital zircon geochronology studies, our new ages corroborate a short time span of zircon crystallization, exhumation, erosion and deposition, burial, and subsequent deformation and metamorphism, a pattern characteristic of modern arc domains. The depositional ages also exhibit a remarkable systematic spatial variation with latitude, younging southwards along the sampled transect. The southward younging of deposition and plutonism was previously explained as a result of outwardly propagating extension (crustal tearing) and magmatic underplating above mantle upwelling in a non-plate-tectonic regime, implying that the observed compressional deformation and metamorphism was superposed on an extensional phase. On the contrary, combining the detrital zircon ages from the metasedimentary belts with the previously published structural information from coeval plutons, we suggest that the basin development and sediment deposition took place during an overall compressive/transpressional setting and is well compatible with an Alaskan-type accretionary orogen controlled by slab rollback.

Název v anglickém jazyce

Late Archean sedimentary basins in the northeastern Superior Province, Canada: Plume-generated crustal tears or syn-convergent accretionary belts?

Popis výsledku anglicky

This study reports new U–Pb detrital zircon ages determined using the laser ablation inductively coupled plasma mass spectrometry (LA ICP-MS) from the greenstone-dominated and metasedimentary belts of the northeastern Superior Province, Qu´ebec, Canada. The U–Pb ages were obtained along a ca. 300 km long transect that traverses the Opinaca and N´emiscau belts from north to south across their strike, but also traverses supracrustal volcanosedimentary units that underlie these belts or are infolded and/or imbricated within the gneissic basement. The zircon age data, supported by trace element and Nd isotope geochemistry, point to three main sediment sources: (1) ‘old cratonic’ with ages >3 Ga (likely coming from the northerly Minto block), (2) local gneissic (TTG) basement with ages scattered at around 2.8 Ga, and (3) plutons and/or their volcanic counterparts only shortly preceding, or being broadly coeval with, the sediment deposition. The depositional ages range from 2730 ± 11 Ma to 2661 ± 11 Ma, but in most cases fall into a narrower age interval between ca. 2710 Ma and ca. 2685 Ma. In agreement with the previous detrital zircon geochronology studies, our new ages corroborate a short time span of zircon crystallization, exhumation, erosion and deposition, burial, and subsequent deformation and metamorphism, a pattern characteristic of modern arc domains. The depositional ages also exhibit a remarkable systematic spatial variation with latitude, younging southwards along the sampled transect. The southward younging of deposition and plutonism was previously explained as a result of outwardly propagating extension (crustal tearing) and magmatic underplating above mantle upwelling in a non-plate-tectonic regime, implying that the observed compressional deformation and metamorphism was superposed on an extensional phase. On the contrary, combining the detrital zircon ages from the metasedimentary belts with the previously published structural information from coeval plutons, we suggest that the basin development and sediment deposition took place during an overall compressive/transpressional setting and is well compatible with an Alaskan-type accretionary orogen controlled by slab rollback.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10505 - Geology

Projekt

<a href="/cs/project/GA19-08066S" target="_blank" >GA19-08066S: Pozdně archaické granity: indikátory moderní deskové tektoniky?</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

Precambrian Research

ISSN

0301-9268

e-ISSN

1872-7433

Svazek periodika

406

Číslo periodika v rámci svazku

June

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

19

Strana od-do

107386

Kód UT WoS článku

001227284600001

EID výsledku v databázi Scopus

2-s2.0-85189980023