Morphometrical and geochronological constraints on the youngest eruptive activity in East-Central Europe at the Ciomadul (Csomád) lava dome complex, East Carpathians
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Tartalom: http://dx.doi.org/10.1016/j.jvolgeores.2013.01.013
Archívum: MTA Könyvtár
Gyűjtemény: Status = Published



Type = Article
Cím:
Morphometrical and geochronological constraints on the youngest eruptive activity in East-Central Europe at the Ciomadul (Csomád) lava dome complex, East Carpathians
Létrehozó:
Karátson, Dávid
Telbisz, Tamás
Harangi, Szabolcs
Magyari, Enikő
Dunkl, István
Kiss, Balázs
Jánosi, Csaba
Veres, Daniel
Braun, Mihály
Fodor, Emőke
Biró, Tamás
Kósik, Szabolcs
von Eynatten, Hilmar
Lin, Ding
Dátum:
2013
Téma:
GB Physical geography / leíró földrajz
QE02 Geochemistry / geokémia
QE06 Petrology. Petrography / kőzettan, petrográfia
Tartalmi leírás:
The timing of Late Pleistocene volcanic activity of the Ciomadul (Csomád) dacitic lava dome complex, site of
the youngest eruptions in the Carpathians, has been constrained by morphometric analysis and radiometric
chronology. Peléan domes and asymmetric domes/coulées built up the volcano, including the central edifice that
hosts the youngest twin craters ofMoho? (Mohos) peat bog and lake St. Ana (Szent Anna). A comparative digital
elevationmodel (DEM)-basedmorphometric analysis of lava domes (29worldwide examples including 5 domes
from Ciomadul) shows that it is themean slope of the upper dome flank that correlates best with age. Although
the logarithmic relationship is only moderately strong (R=0.80), slope characteristics of the Ciomadul domes fit
to those of 10?100 ka old domes. These young ages contradict the previous K/Ar dates giving as old as 1 Ma ages
on a number of domes, but are supported by ongoing U?Pb and (U?Th)/He zircon dating. The latter methods constrain the whole volcanic activity to the past 250 ka and the emplacement of most lava domes within the period of 150?100 ka.
The volcanism at Ciomadul produced alternating effusive and explosive eruptions including lava dome collapses and successive crater formations. The latest, possibly subplinian explosive event formed the wellpreserved
St. Ana crater. Radiocarbon dating of organic remains from a sediment core that reached 11 m into the lacustrine infill of St. Ana suggests that the crater was formed prior to 26,000 years BP.
Típus:
Article
PeerReviewed
Formátum:
text
Azonosító:
Karátson, Dávid and Telbisz, Tamás and Harangi, Szabolcs and Magyari, Enikő and Dunkl, István and Kiss, Balázs and Jánosi, Csaba and Veres, Daniel and Braun, Mihály and Fodor, Emőke and Biró, Tamás and Kósik, Szabolcs and von Eynatten, Hilmar and Lin, Ding (2013) Morphometrical and geochronological constraints on the youngest eruptive activity in East-Central Europe at the Ciomadul (Csomád) lava dome complex, East Carpathians. Journal of Volcanology and Geothermal Research, 255. pp. 43-56. ISSN 0377-0273
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