Number of the records: 1
Volcanic activity in Late Variscan Krkonoše Piedmont Basin: petrological and geochemical constraints
- 1.
SYSNO ASEP 0103877 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Ostatní články Title Volcanic activity in Late Variscan Krkonoše Piedmont Basin: petrological and geochemical constraints Title Vulkanická aktivita v pozdně variském podrkonošské pánvi: petrologické a geochemické upřesnění Author(s) Ulrych, Jaromír (GLU-S) RID, SAI
Štěpánková, Jana (GLU-S)
Novák, Jiří Karel (GLU-S) RID, SAI
Pivec, Edvín (GLU-S) SAI, RID
Prouza, V. (CZ)Source Title Slovak Geological Magazine - ISSN 1335-096X
Roč. 8, 3-4 (2002), s. 219-234Number of pages 16 s. Language eng - English Country SK - Slovakia Keywords Late Palaeozoic volcanism ; Krkonoše Piedmont Basin ; geochemistry Subject RIV DB - Geology ; Mineralogy R&D Projects IAA3013903 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) Annotation Three groups of Late Palaeozoic volcanic rocks can be distinguished in the Krkonoše Piedmont Basin: (1) trachyandesites, andesites trachytes, trachydacites, (II) basaltic trachyandesites, basaltic andesites basalts, trachybasalts, and (III) rhyolites. Volcanic activity started in the Late Carboniferous, producing calcalkaline (basic) to intermediate volcanics of group I in the southern part of the Krkonoše Piedmont Basin, and migrated north during the Permian, producing calc-alkaline transitional (mildly alkaline ?) intermediate and acid volcanics of groups II and III. Volcanic rocks of intermediate composition are of Carboniferous and permian ages, whereas acid volcanics prevailed in the Permian. Basic to intermediate rock members (groups I and II) represent mantle-derived products affected by crustal contamination during the assimilation-fractional crystallization (AFC) process. Although the primary magma composition is obscured by pervasive crustal assimilation, DM or HIMU sources are more probable than the EM source. Workplace Institute of Geology Contact Jana Popelková, popelkova@gli.cas.cz, Sabina Janíčková, Tel.: 233 087 272 Year of Publishing 2005
Number of the records: 1