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VOLCANIC EVOLUTION AND STRATIGRAPHY OF THE MIOCENE BÖRZSÖNY MOUNTAINS, HUNGARY: AN INTEGRATED STUDY

In: Geologica Carpathica, vol. 51, no. 5
David Karatson - Emo Marton - Szabolcs Harangi - Sandor Jozsa - Kadosa Balogh - Zoltan Pecskay - Sandor Kovacsvolgyi - Gyorgy Szakmany - Alfred Dulai
Detaily:
Rok, strany: 2000, 325 - 343
O článku:
The Middle Miocene volcanic evolution of the Börzsöny Mountains, North Hungary, is presented, correlating new volcanological, petrological, geochemical, geophysical and paleontological data and establishing a detailed stratigraphy on the basis of additional K/Ar radiometric and paleomagnetic measurements. For the earliest volcanic activity, previous biostratigraphy showing an Early Badenian age has been confirmed and precisely defined by paleomagnetic investigations. The first-stage volcanic formations (16.5–16.0 Ma), deposited in a shallow marine environment, include resedimented, syn-eruptive, garnet-bearing dacitic volcaniclastics (originating mostly from small-scale ignimbrite eruptions) and coeval, garnet-bearing dacitic lava domes, sometimes with their volcaniclastic aprons. As the eruptions filled the marine basin, subaerial dacitic-andesitic volcaniclastics, comprising minor ignimbrites and different types of debris-flow deposits were also deposited. A part of the latter may have been related to the formation of two or three medium-sized calderas. The second stage (16.0–14.5 Ma) was characterized by andesitic lava dome activity terminated by a hydrothermal event. During the first half of this stage, a ca. 30° CCW rotation occurred. The third stage produced the most voluminous, moderately explosive, andesitic — basaltic andesitic High Börzsöny subaerial lava dome complex erupting up to the Badenian/Sarmatian boundary (ca. 13.7 Ma). Correlation of K/Ar geochronological and volcanological data shows that lava dome activity of the second and third stage may have been coeval with marine sedimentation in the southern Börzsöny.
Ako citovať:
ISO 690:
Karatson, D., Marton, E., Harangi, S., Jozsa, S., Balogh, K., Pecskay, Z., Kovacsvolgyi, S., Szakmany, G., Dulai, A. 2000. VOLCANIC EVOLUTION AND STRATIGRAPHY OF THE MIOCENE BÖRZSÖNY MOUNTAINS, HUNGARY: AN INTEGRATED STUDY. In Geologica Carpathica, vol. 51, no.5, pp. 325-343. 1335-0552.

APA:
Karatson, D., Marton, E., Harangi, S., Jozsa, S., Balogh, K., Pecskay, Z., Kovacsvolgyi, S., Szakmany, G., Dulai, A. (2000). VOLCANIC EVOLUTION AND STRATIGRAPHY OF THE MIOCENE BÖRZSÖNY MOUNTAINS, HUNGARY: AN INTEGRATED STUDY. Geologica Carpathica, 51(5), 325-343. 1335-0552.