Early Palaeozoic sedimentary record and provenance of flysch sequencesin the Hovd Zone (western Mongolia): Implications for the geodynamic evolution of the Altai accretionary wedge system
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00025798%3A_____%2F18%3A00000163" target="_blank" >RIV/00025798:_____/18:00000163 - isvavai.cz</a>
Alternative codes found
RIV/00216208:11310/18:10378984
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S1342937X18302223?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S1342937X18302223?via%3Dihub</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.gr.2018.07.005" target="_blank" >10.1016/j.gr.2018.07.005</a>
Alternative languages
Result language
angličtina
Original language name
Early Palaeozoic sedimentary record and provenance of flysch sequencesin the Hovd Zone (western Mongolia): Implications for the geodynamic evolution of the Altai accretionary wedge system
Original language description
Sedimentological and detrital zircon provenance study of the Lower Palaeozoic Zuunnuruu, Tsetseg and Sagsaisedimentary formations was carried out in the eastern part of the Hovd Zone in western Mongolia. Sedimentologicalanalysis has revealed two distinct and consecutive types of sedimentary environments. The LowerOrdovician–earliest Silurian sediments had dominantly volcano-sedimentary character, interpreted as reflectingdeposition in a proximal part of a Pacific-type accretionarywedge. The upper,mainly Devonian part of the profilehas generally siliciclastic flysch-like nature and indicates platform-type depositional setting related to the synextensionalthinning of the accretionary wedge-system. Detrital zircon age populations of all the three studiedformations uniformly show a dominant Neoproterozoic–Ordovician age group at ca. 560–460 Ma, a broadNeo- to Mesoproterozoic peak at ca. 1050–720 Ma, several minor Meso- to Palaeoproterozoic age clusters atca. 1.4, 1.9 and 2.4 Ga and ca. 400–360 Ma peaks in the youngest Devonian formation. The early Palaeozoicpart of the age spectra is interpreted as detritus mainly derived from the magmatic rocks of the Cambrian–Ordovician Ikh-Mongol Arc System within the nearby Lake Zone and the youngest ages from the neighbouringDevonian granites. The other sources were identified as more distal Tonian magmatic-arc complexes, Rodiniabreak-up-related volcanic rocks and basement of the Precambrian Zavkhan and Baidrag continental blockseven further east. The maximum sedimentary ages, determined by the youngest detrital zircons, shift the endof deposition of the Sagsai Formation at least to the latest Devonian. Nearly identical detrital zircon age spectrafromLower Palaeozoic sequences of the Hovd Zone and other parts of the Altai belt support an existence of a singlegiant accretionary complex developed along the entire outer margin of the Ikh-Mongol Arc System. Thechange in the sedimentary style suggests the latest Ordovician–earliest Silurian termination ofmagmatic-arc activityin the western Lake Zone, marking the onset of late Silurian–Devonian crustal extensional period in theAltai accretionary system.
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/GA17-17540S" target="_blank" >GA17-17540S: Contrasting mechanisms of formation of the Pangea supercotinent: new insights into formation of continental crust</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Gondwana research
ISSN
1342-937X
e-ISSN
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Volume of the periodical
64
Issue of the periodical within the volume
December
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
21
Pages from-to
163-183
UT code for WoS article
000454669700010
EID of the result in the Scopus database
2-s2.0-85053808960