The crust-mantle transition beneath Northeast China from P-wave receiver functions

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985530%3A_____%2F23%3A00572100" target="_blank" >RIV/67985530:_____/23:00572100 - isvavai.cz</a>

Result on the web

<a href="https://www.frontiersin.org/articles/10.3389/feart.2023.1144819/full" target="_blank" >https://www.frontiersin.org/articles/10.3389/feart.2023.1144819/full</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3389/feart.2023.1144819" target="_blank" >10.3389/feart.2023.1144819</a>

Result language

angličtina

Original language name

The crust-mantle transition beneath Northeast China from P-wave receiver functions

Original language description

Introduction: The continental lithosphere of the Northeast China Plain (NECP) is probed using P–wave receiver function analysis of passive seismic data. The NECP is much–discussed as it includes different geological provinces of varying tecto–magmatic origin and dates back from Archean to Holocene. Quantifying the tectonic and magmatic influences on the structure and composition of the lithosphere puts important constraints on evolution of NECP. For this, we explore 75 sites across NECP using receiver function analysis. Methods: A recently developed technique of inverting for 1–D S–wave velocity profiles beneath seismic stations that is based on the principles of Bayesian statistics (hierarchical transdimensional Bayesian Inversion, HTBI) is applied to receiver functions from the NECP. In addition, an improved crustal thickness–compressional to shear wave velocity ratio (H–κ) analysis was conducted to retrieve the crustal thickness and Vp/Vs ratio of the region. These estimated point measurements are integrated and systematically studied for a regional view of the current crustal architecture. Results and Discussion: We observe a laterally varying and highly complex lithosphere beneath the NECP. A shallower crust–mantle transition (≤32 km) characterises the Precambrian North China craton and Late Mesozoic–Cenozoic Songliao Basin from the adjacent Central Asian Orogenic Belt and the Changbaishan Volcanic field (35–40 km). Beneath the latter, low Vp/Vs ratios (~1.65) are obtained, whereas all other regions feature ratios in excess of 1.75. Multiple velocity gradients are observed at crustal depths within the craton, in contrast to the adjacent orogen, which indicates a higher degree of crustal complexity of the former. The width of the crust–mantle transition across the NECP is found to be mainly intermediate (2–7 km) and occasionally sharp (≤2 km). From our observations, we infer that there is a substantial difference between the eastern North China Craton’s lithospheric architecture and the rest of the NECP, with most of the NECP exhibiting more complexity than previously reported.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10507 - Volcanology

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2023

Confidentiality

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

Name of the periodical

Frontiers in Earth Science

ISSN

2296-6463

e-ISSN

2296-6463

Volume of the periodical

11

Issue of the periodical within the volume

May

Country of publishing house

CH - SWITZERLAND

Number of pages

14

Pages from-to

1144819

UT code for WoS article

001000449900001

EID of the result in the Scopus database

2-s2.0-85159941739