The České Středohoří Mts.: Volcanostratigraphy and Geochemistry
The České středohoří Mts. is an erosional relict of the Cenozoic volcanosedimentary complex in the Ohře Rift. On the basis of a new volcanological model and geochemical investigation the following volcanostratigraphicalformationwere recognized: (i) the Lower Formation - lavas and volcanoclastites of basanitic character (36-26 Ma, 12 norm. Ol; Mgx=65-82, … celý popis
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- Geolines. -- ISSN 1210-9606. -- Roč. 9, (1999), s. 21-28
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MARC
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| 040 | |a ABC023 |b cze |d ABA001 |9 2 | ||
| 080 | |a 55 |2 MRF | ||
| 100 | 1 | |a Cajz, Vladimír, |d 1959- |7 xx0015365 |4 aut | |
| 245 | 1 | 4 | |a The České Středohoří Mts.: Volcanostratigraphy and Geochemistry / |c Vladimír Cajz ; Karel Vokurka, Kadosa Balogh, Miloš Lang, Jaromír Ulrych |
| 300 | |b il. | ||
| 520 | |a The České středohoří Mts. is an erosional relict of the Cenozoic volcanosedimentary complex in the Ohře Rift. On the basis of a new volcanological model and geochemical investigation the following volcanostratigraphicalformationwere recognized: (i) the Lower Formation - lavas and volcanoclastites of basanitic character (36-26 Ma, 12 norm. Ol; Mgx=65-82, aver.75; high contents of Cr, Ni, Co, Sc; common presence of lherzolite xenoliths;low87Sr/86Sr=0.70313-0.70353; high 143 Nd/144 Nd=0.51238-0.512849, eNd=+2.8+4.8) corresponding to low-differenciated, only weakly crustal-contaminated upper mantle products; (ii) the Upper Formation - lavas and pyroclasticoftrachybasaltic type (31-25 Ma, 2 norm. Ol; Mgx=60-72, aver. 65; low contents of Cr, Ni, Co, Sc; lack of lherzolite xenoliths; higher 87Sr/86Sr=0.70443-0.70465; lower 143Nd/144Nd=0.512679-0.512742, eNd=+1.5 to + 2.6)representingdifferentiated and partly crustal-contaminated evolved products; (iii) the probable Uppermost Formation - flow(s) of basanite (24Ma) similar in geochemical characteristics to those of the Lower Formation. The Group (iv)of the LateMiocene Intrusives (13 Ma) similar to those of the Lower Formation (16norm. Ol; Mgx=70-79, aver. 75; high contents of Cr, Ni, Co, Sc; somewhat higher 87Sr/86Sr=0.70365-0.70376; somewhat lower 143Nd/144Nd=0.512845-0.512847,eNd=+4.4to +4.3) representing primitive magma probably associated with rejuvenation of tectonic movements in the OR or pulsation of magmatic activity, was used for comparison | ||
| 611 | 2 | 4 | |a Magmatism and Rift Basin Evolution |d (1998 : |c Rychnov nad Kněžnou, Česko) |
| 653 | 0 | |a třetihory |a vulkanismus |a bazalt alkalický |a bazanit |a trachybazalt |a vzácné zeminy |a petrogeneze |a Česko |a Čechy |a České středohoří | |
| 700 | 1 | |a Ulrych, Jaromír, |d 1943- |7 ola2003206190 |4 aut | |
| 700 | 1 | |a Vokurka, Karel |4 aut | |
| 700 | 1 | |a Balogh, Kadosa |4 aut | |
| 700 | 1 | |a Lang, Miloš |4 aut | |
| 773 | 0 | |t Geolines |x 1210-9606 |g Roč. 9, (1999), s. 21-28 |q 9 |9 1999 | |
| 910 | |a ABC023 |x an2000geox0000050 | ||
| 990 | |a RS | ||
| 998 | |a http://aleph.nkp.cz/F/?func=direct&doc_number=000648773&local_base=ANL | ||