Pleistocene fluvial terraces of the Svratka river - facies and
provenance study

J 2007

Pleistocene fluvial terraces of the Svratka river - facies and provenance study

NEHYBA, Slavomír a David BURIÁNEK

Základní údaje

Originální název

Pleistocene fluvial terraces of the Svratka river - facies and provenance study

Název česky

Plestocenní fluviální řerasy řeky Svratky - faciální studium a provenience

Autoři

NEHYBA, Slavomír (203 Česká republika, garant) a David BURIÁNEK (203 Česká republika)

Vydání

GeoAlp, Innsbruck, Inst. fur Geologie Uni Innsbruck, 2007, 1824-7741

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10500 1.5. Earth and related environmental sciences

Stát vydavatele

Rakousko

Utajení

není předmětem státního či obchodního tajemství

Kód RIV

RIV/00216224:14310/07:00020461

Organizační jednotka

Přírodovědecká fakulta

Klíčová slova anglicky

Pleistocene- fluvial terraces- facies- provenance study

Příznaky

Mezinárodní význam

Změněno: 14. 9. 2007 10:25, prof. RNDr. Slavomír Nehyba, Dr.

Anotace

ORIG CZ

V originále

The middle course of the Svratka river flows through the geologically and geomorphologically complex area around the Brno city. This area underwent dynamic development during the Quaternary. Terrace system along the river course developed, witnessing the alternating incision and deposition phases during the last 1 Ma. The Quaternary uplift of the area can be deduced from the incision record of the river system. Sea level changes are assumed to have played negligible role (distance to the coastline, low river gradient). Three successive river terraces (Pleistocene) were studied within the terrace staircase, the highest of which is about 60 m and the lowest about 15 m above the present river. Preservation of the river deposits is mostly fragmentary. The middle terrace (ca. 40 m above the present river) is the best preserved one (with largest lateral extent and thickness). The terrace sediments are composed of fluvial gravels and sands. Architectural components within the outcrops were defined and include: 1) basal, thalweg-fill deposits, 2) crudely stratified gravely barform deposits, and 3) inclined gravely and sandy barform deposits. Results of facies study reveal deposition in the high-energy rivers. Preserved fluvial deposits provide important sedimentary archive witnessing the condition within both provenance and depositional area during the Pleistocene. Provenance studies are based on the petrography of the pebbles and cobbles, heavy mineral assemblages and results of the microprobe analyses of selected minerals (garnet, tourmaline, rutile, spinel). Varying role of distant (crystalline rocks of Moravicum, Svratka and Polička Crystalline Units) and local (Neogene deposits of the Carpathian Foredeep, Permian deposits of the Boskovice Furrow, Devonian conglomerates/Old Red facies and magmatic rocks of the Brno Massif) sources can be followed within terrace system.

Česky

Pleistocenní fluviální sedimenty řeky Svratky byly zhodnoceny z pohledu faciálního studia a provenience (valounová analýza, těžké minerály, chemismus granátu, rutilu a turmalínu). Získaná dat a dovolují zhodnotit roli proximálních a distálních zdrojových oblastí.

Návaznosti

GA205/06/1024, projekt VaV

Název: Geomorfologie údolí střední Svratky - kvartérní vývoj a environmentální aspekty

Investor: Grantová agentura ČR, Geomorfologie údolí střední Svratky - kvartérní vývoj a environmentální aspekty

Citovat

NEHYBA, Slavomír a David BURIÁNEK. Pleistocene fluvial terraces of the Svratka river - facies and provenance study. GeoAlp. Innsbruck: Inst. fur Geologie Uni Innsbruck, 2007, roč. 4/2004, č. 1, s. 70-70. ISSN 1824-7741.

@article{724974,
   author = {Nehyba, Slavomír and Buriánek, David},
   article_location = {Innsbruck},
   article_number = {1},
   keywords = {Pleistocene- fluvial terraces- facies- provenance study},
   language = {eng},
   issn = {1824-7741},
   journal = {GeoAlp},
   title = {Pleistocene fluvial terraces of the Svratka river - facies and provenance study},
   volume = {4/2004},
   year = {2007}
}

TY  - JOUR
ID  - 724974
AU  - Nehyba, Slavomír - Buriánek, David
PY  - 2007
TI  - Pleistocene fluvial terraces of the Svratka river - facies and provenance study
JF  - GeoAlp
VL  - 4/2004
IS  - 1
SP  - 70-70
EP  - 70-70
PB  - Inst. fur Geologie Uni Innsbruck
SN  - 18247741
KW  - Pleistocene- fluvial terraces- facies- provenance study
N2  - The middle course of the Svratka river flows through the geologically and geomorphologically complex area around the Brno city. This area underwent dynamic development during the Quaternary. Terrace system along the river course developed, witnessing the alternating incision and deposition phases during the last 1 Ma. The Quaternary uplift of the area can be deduced from the incision record of the river system. Sea level changes are assumed to have played negligible role (distance to the coastline, low river gradient). Three successive river terraces (Pleistocene) were studied within the terrace staircase, the highest of which is about 60 m and the lowest about 15 m above the present river. Preservation of the river deposits is mostly fragmentary. The middle terrace (ca. 40 m above the present river) is the best preserved one (with largest lateral extent and thickness). The terrace sediments are composed of fluvial gravels and sands. Architectural components within the outcrops were defined and include: 1) basal, thalweg-fill deposits, 2) crudely stratified gravely barform deposits, and 3) inclined gravely and sandy barform deposits. Results of facies study reveal deposition in the high-energy rivers. Preserved fluvial deposits provide important sedimentary archive witnessing the condition within both provenance and depositional area during the Pleistocene. Provenance studies are based on the petrography of the pebbles and cobbles, heavy mineral assemblages and results of the microprobe analyses of selected minerals (garnet, tourmaline, rutile, spinel). Varying role of distant (crystalline rocks of Moravicum, Svratka and Polička Crystalline Units) and local (Neogene deposits of the Carpathian Foredeep, Permian deposits of the Boskovice Furrow, Devonian conglomerates/Old Red facies and magmatic rocks of the Brno Massif) sources can be followed within terrace system.
ER  -

NEHYBA, Slavomír a David BURIÁNEK. Pleistocene fluvial terraces of the Svratka river - facies and provenance study. \textit{GeoAlp}. Innsbruck: Inst. fur Geologie Uni Innsbruck, 2007, roč.~4/2004, č.~1, s.~70-70. ISSN~1824-7741.

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