Channelized metasomatism in Archean cratonic roots as a mechanism of lithospheric refertilization

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985530%3A_____%2F25%3A00638436" target="_blank" >RIV/67985530:_____/25:00638436 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.nature.com/articles/s41467-025-62912-6" target="_blank" >https://www.nature.com/articles/s41467-025-62912-6</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1038/s41467-025-62912-6" target="_blank" >10.1038/s41467-025-62912-6</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Channelized metasomatism in Archean cratonic roots as a mechanism of lithospheric refertilization

Popis výsledku v původním jazyce

Archean cratons represent stable continental domains which form the nuclei of the Earth's continents due to their thick ( >200 km), mechanically resistant keels. Cratons and their stable roots form through melt and fluid depletion processes. However, metasomatic refertilization may occur due to processes coeval with craton construction and/or overprinting episodes. Magnetotellurics, a geophysical method measuring subsurface electrical resistivity, is sensitive to the compositional and thermal states of the lithosphere and is useful in mapping depleted and refertilized cratonic domains. Here we show the results of a 3D anisotropic inversion to image the lithospheric resistivity structure of the western Superior Craton. The resistivity model reveals widespread (500x300 km(2)) anisotropy with a north-south conductive axis at depths similar to 100-200 km, inferred to represent phlogopite-bearing channels emplaced during mantle plume activity. The results have implications for our understanding of the modification and long-term stability of cratonic lithosphere, and the imaging and interpretation of their preserved geophysical signatures.

Název v anglickém jazyce

Channelized metasomatism in Archean cratonic roots as a mechanism of lithospheric refertilization

Popis výsledku anglicky

Archean cratons represent stable continental domains which form the nuclei of the Earth's continents due to their thick ( >200 km), mechanically resistant keels. Cratons and their stable roots form through melt and fluid depletion processes. However, metasomatic refertilization may occur due to processes coeval with craton construction and/or overprinting episodes. Magnetotellurics, a geophysical method measuring subsurface electrical resistivity, is sensitive to the compositional and thermal states of the lithosphere and is useful in mapping depleted and refertilized cratonic domains. Here we show the results of a 3D anisotropic inversion to image the lithospheric resistivity structure of the western Superior Craton. The resistivity model reveals widespread (500x300 km(2)) anisotropy with a north-south conductive axis at depths similar to 100-200 km, inferred to represent phlogopite-bearing channels emplaced during mantle plume activity. The results have implications for our understanding of the modification and long-term stability of cratonic lithosphere, and the imaging and interpretation of their preserved geophysical signatures.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10505 - Geology

Projekt

<a href="/cs/project/GF22-17248L" target="_blank" >GF22-17248L: Testování 4D vývoje aktivních magmatických systémů pomocí magnetotelurického monitorování</a><br>

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

Nature Communications

ISSN

2041-1723

e-ISSN

2041-1723

Svazek periodika

16

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

10

Strana od-do

7701

Kód UT WoS článku

001553489500002

EID výsledku v databázi Scopus

2-s2.0-105013574241