On the anatomy and structural control of a dyke swarm that fed caldera-forming ignimbrite eruptions
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985831%3A_____%2F23%3A00574886" target="_blank" >RIV/67985831:_____/23:00574886 - isvavai.cz</a>
Alternative codes found
RIV/00216208:11310/23:10467149
Result on the web
<a href="https://www.lyellcollection.org/doi/10.1144/jgs2022-119" target="_blank" >https://www.lyellcollection.org/doi/10.1144/jgs2022-119</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1144/jgs2022-119" target="_blank" >10.1144/jgs2022-119</a>
Alternative languages
Result language
angličtina
Original language name
On the anatomy and structural control of a dyke swarm that fed caldera-forming ignimbrite eruptions
Original language description
The evolution of eruptive vents related to calderas is not fully understood. We focus on a structural, rock-magnetic and geochemical investigation of a 314 Ma rhyolite dyke swarm associated with the late-orogenic Altenberg–Teplice Caldera, Bohemian Massif, eastern Variscan belt. The whole-rock major element, trace element and Nd–Pb isotope geochemistry along with the published U–Pb zircon geochronology link the extra-caldera dyke swarm with intra-caldera ignimbrites. The magnetic fabrics determined using the anisotropy of magnetic susceptibility are interpreted to record a continuum from magma ascent to emplacement and eruption during sinistral shearing. The latter evidences an interplay with regional tectonics associated with the activity of crustal-scale shear zones. The sinistral kinematics and strike of the dyke swarm, the elongation of caldera intrusive units, and the kinematics of major caldera faults are consistent with the dextral Riedel shear system, where the dykes correspond to antithetic R’ or X shears. Such a kinematic configuration implies that the maximum and minimum principal stresses were oriented roughly north–south and east–west, respectively. The relation between the stress field and the caldera elongation and orientation is not typical. We suggest that a pre-existing mutually perpendicular set of cross-cutting structural lineaments largely controlled the magma chamber and caldera formation.
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/GJ19-02177Y" target="_blank" >GJ19-02177Y: Magma transfer and emplacement processes in collapsing orogens</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
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
Journal of the Geological Society
ISSN
0016-7649
e-ISSN
2041-479X
Volume of the periodical
180
Issue of the periodical within the volume
5
Country of publishing house
GB - UNITED KINGDOM
Number of pages
18
Pages from-to
jgs2022-119
UT code for WoS article
001079766600001
EID of the result in the Scopus database
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