Cold deep subduction recorded by remnants of a Paleoproterozoic carbonated slab

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43410%2F18%3A43914300" target="_blank" >RIV/62156489:43410/18:43914300 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216305:26620/18:PU136068

Výsledek na webu

<a href="https://doi.org/10.1038/s41467-018-05140-5" target="_blank" >https://doi.org/10.1038/s41467-018-05140-5</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1038/s41467-018-05140-5" target="_blank" >10.1038/s41467-018-05140-5</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Cold deep subduction recorded by remnants of a Paleoproterozoic carbonated slab

Popis výsledku v původním jazyce

The absence of low-thermal gradients in old metamorphic rocks (&lt; 350 degrees C GPa(-1)) has been used to argue for a fundamental change in the style of plate tectonics during the Neoproterozoic Era. Here, we report data from an eclogite xenolith in Paleoproterozoic carbonatite in the North China craton that argues for cold subduction as early as 1.8 Ga. The carbonatite has a sediment-derived C isotope signature and enriched initial Sr-Nd isotope composition, indicative of ocean-crust components in the source. The eclogite records peak metamorphic pressures of 2.5-2.8 GPa at 650-670 degrees C, indicating a cold thermal gradient, 250(+/- 15)degrees C GPa(-1). Our data, combined with old low-temperature events in the West African and North American cratons, reveal a global pattern that modern-style subduction may have been established during the Paleoproterozoic Era. Paleoproterozoic carbonatites are closely associated with granulites and eclogites in orogens worldwide, playing a critical role in the Columbia supercontinent amalgamation and deep carbon cycle through time.

Název v anglickém jazyce

Cold deep subduction recorded by remnants of a Paleoproterozoic carbonated slab

Popis výsledku anglicky

The absence of low-thermal gradients in old metamorphic rocks (&lt; 350 degrees C GPa(-1)) has been used to argue for a fundamental change in the style of plate tectonics during the Neoproterozoic Era. Here, we report data from an eclogite xenolith in Paleoproterozoic carbonatite in the North China craton that argues for cold subduction as early as 1.8 Ga. The carbonatite has a sediment-derived C isotope signature and enriched initial Sr-Nd isotope composition, indicative of ocean-crust components in the source. The eclogite records peak metamorphic pressures of 2.5-2.8 GPa at 650-670 degrees C, indicating a cold thermal gradient, 250(+/- 15)degrees C GPa(-1). Our data, combined with old low-temperature events in the West African and North American cratons, reveal a global pattern that modern-style subduction may have been established during the Paleoproterozoic Era. Paleoproterozoic carbonatites are closely associated with granulites and eclogites in orogens worldwide, playing a critical role in the Columbia supercontinent amalgamation and deep carbon cycle through time.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10505 - Geology

Projekt

<a href="/cs/project/LQ1601" target="_blank" >LQ1601: CEITEC 2020</a><br>

Návaznosti

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

Rok uplatnění

2018

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

—

Svazek periodika

9

Číslo periodika v rámci svazku

17 July

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

8

Strana od-do

"nestrankovano"

Kód UT WoS článku

000438857400012

EID výsledku v databázi Scopus

2-s2.0-85050402813