Publication detail

Cold deep subduction recorded by remnants of a Paleoproterozoic carbonated slab

XU, C. KYNICKÝ, J. SONG, W. TAO, RB. LU, Z. LI, YX. YANG, Y. POHANKA, M. VAŠINOVÁ GALIOVÁ, M. ZHANG, LF. FEI, YW.

Original Title

Cold deep subduction recorded by remnants of a Paleoproterozoic carbonated slab

Type

journal article in Web of Science

Language

English

Original Abstract

The absence of low-thermal gradients in old metamorphic rocks (< 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.

Keywords

north china craton; high-pressure granulites; plate-tectonics; rutile thermometer; mixing properties; evolution; geochemistry; eclogites; petrology; crust

Authors

XU, C.; KYNICKÝ, J.; SONG, W.; TAO, RB.; LU, Z.; LI, YX.; YANG, Y.; POHANKA, M.; VAŠINOVÁ GALIOVÁ, M.; ZHANG, LF.; FEI, YW.

Released

17. 7. 2018

ISBN

2041-1723

Periodical

NATURE COMMUNICATIONS

Year of study

9

Number

1

State

United Kingdom of Great Britain and Northern Ireland

Pages from

1

Pages to

8

Pages count

8

URL

https://doi.org/10.1038/s41467-018-05140-5

BibTex

@article{BUT163416,
  author="XU, C. and KYNICKÝ, J. and SONG, W. and TAO, RB. and LU, Z. and LI, YX. and YANG, Y. and POHANKA, M. and VAŠINOVÁ GALIOVÁ, M. and ZHANG, LF. and FEI, YW.",
  title="Cold deep subduction recorded by remnants of a Paleoproterozoic carbonated slab",
  journal="NATURE COMMUNICATIONS",
  year="2018",
  volume="9",
  number="1",
  pages="1--8",
  doi="10.1038/s41467-018-05140-5",
  issn="2041-1723",
  url="https://doi.org/10.1038/s41467-018-05140-5"
}