Crustal-Scale Disharmonic Structural Pattern of West Junggar: Unveiling a Permian Indentation of Junggar Block Into Northern Kazakhstan Orocline
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00025798%3A_____%2F23%3A10168707" target="_blank" >RIV/00025798:_____/23:10168707 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1029/2022TC007689" target="_blank" >https://doi.org/10.1029/2022TC007689</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1029/2022TC007689" target="_blank" >10.1029/2022TC007689</a>
Alternative languages
Result language
angličtina
Original language name
Crustal-Scale Disharmonic Structural Pattern of West Junggar: Unveiling a Permian Indentation of Junggar Block Into Northern Kazakhstan Orocline
Original language description
As a crustal-scale orocline in the Central Asian Orogenic Belt (CAOB), the Kazakhstan Orocline in particular its northern limb intervenes the Junggar Block and Chinese Altai. The West Junggar exhibits a structural pattern that is disharmonic from the major structure of the orocline. How and when such a structural complexity was formed remains poorly understood. To address this issue, we carried out detailed mapping, structural analysis and revision of geophysical data in three key areas of the West Junggar. It is shown that different arc chains experienced independent geological histories before they accreted with one another. Such an accretionary process generated the regional D1 deformation in late Carboniferous. Subsequent D2 shortening event produced variable superimposed structures, including crescent-mushroom-like folding in the Boshchekul-Chingiz Arc and partitioned sinistral shearing of the West Karamay Unit. The synformal folding in the Zharma-Saur Arc and crustal-scale Erqis-Zaysan sinistral strike-slip shearing in late Permian-Triassic probably resulted from changing configuration of regional stress. Combined with previous data, we propose that the orogenic fabrics of arc chains and accretionary wedges were primarily related to shaping the basic structural framework of the Kazakhstan Orocline until late Carboniferous. The anticlockwise rotation of the northern limb of the orocline was associated with the indentation of the Junggar Block into the arc chains. Progressive indentation resulted in the first passive bending of arc chains followed by deformation partitioning into simple shear dominated transpression along the western margin of the Junggar Block and pure shear dominated transpression away from the indenter.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10505 - Geology
Result continuities
Project
<a href="/en/project/GX19-27682X" target="_blank" >GX19-27682X: Principal mechanisms of peripheral continental growth during supercontinent cycle</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Tectonics
ISSN
0278-7407
e-ISSN
1944-9194
Volume of the periodical
42
Issue of the periodical within the volume
5
Country of publishing house
US - UNITED STATES
Number of pages
30
Pages from-to
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UT code for WoS article
001000279100001
EID of the result in the Scopus database
2-s2.0-85160443773