Felsic diapirism beneath the high-grade terrains in the eastern Bohemian Massif - refraction tomography evidence
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985530%3A_____%2F18%3A00507297" target="_blank" >RIV/67985530:_____/18:00507297 - isvavai.cz</a>
Result on the web
<a href="http://www.jgeosci.org/detail/jgeosci.270" target="_blank" >http://www.jgeosci.org/detail/jgeosci.270</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.3190/jgeosci.270" target="_blank" >10.3190/jgeosci.270</a>
Alternative languages
Result language
angličtina
Original language name
Felsic diapirism beneath the high-grade terrains in the eastern Bohemian Massif - refraction tomography evidence
Original language description
Unlike standard ray-based tomographies, the Depth-Recursive Tomography on Grid (DREG) method assesses the travel-time fit at each model grid node using a regular network of refraction rays. This concept allows estimating the lateral resolution achieved in the velocity image that regards the chosen confidence levels and the strength of velocity anomalies. Recently, The DRTG has been applied to the S01 and CEL09 refraction profiles imaging major crustal structures of the Bohemian Massif in enhanced resolution. Now, similar enhanced velocity models are derived along the S04, S02 and S03 profiles mapping the Sudetic and Moldanubian regions. The S02 and S03 and the transverse CEL09 and S04 velocity sections particularly imaged the subsurface of the Moldanubian high-grade belts to the 15-20 km depth. Their common interpretation revealed the signatures of exhumation processes from upper-mantle depths assumed in this region. Along the western belt of Moldanubian high-grade rocks, the S02 section revealed an extensive HV body shallowly emplaced beneath the high-grade Gfohl and Ostrong assemblages. Three mid-crustal HV elevations, correlating with local magnetic anomalies, obviously represent the deep sources of this HV mafic body and indicate its autochthonous nature. Finally, the DRTG also detected a shallowly emplaced ITV layer beneath the Saxonian Granulite Massif at the S04 section. The mid-crustal HV-LV-HV diapiric triplets and shallowly emplaced HV bodies are likely typical of the high-grade terrains. The observed patterns resulted from contemporaneous intrusion of mafic and, more viscous, felsic magmas during continental collision. The inferred structural features of subduction-exhumation processes are suggested to further constrain their thermo-mechanic modeling.
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
10507 - Volcanology
Result continuities
Project
<a href="/en/project/SB%2F630%2F3%2F02" target="_blank" >SB/630/3/02: SLICE - Seismic Lithospheric Investigation of Central Europe</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
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
Journal of Geosciences
ISSN
1802-6222
e-ISSN
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Volume of the periodical
63
Issue of the periodical within the volume
3
Country of publishing house
CZ - CZECH REPUBLIC
Number of pages
25
Pages from-to
227-251
UT code for WoS article
000447813900002
EID of the result in the Scopus database
2-s2.0-85059157146