J 2017

Fault slip versus slope deformations: Experience from paleoseismic trenches in the region with low slip-rate faults and strong Pleistocene periglacial mass wasting (Bohemian Massif)

ŠPAČEK, Petr, Jan VALENTA, Petr TÁBOŘÍK, Vít AMBROŽ, Michal URBAN et. al.

Basic information

Original name

Fault slip versus slope deformations: Experience from paleoseismic trenches in the region with low slip-rate faults and strong Pleistocene periglacial mass wasting (Bohemian Massif)

Name in Czech

Fault slip versus slope deformations: Experience from paleoseismic trenches in the region with low slip-rate faults and strong Pleistocene periglacial mass wasting (Bohemian Massif)

Authors

ŠPAČEK, Petr (203 Czech Republic, guarantor, belonging to the institution), Jan VALENTA (203 Czech Republic), Petr TÁBOŘÍK (203 Czech Republic), Vít AMBROŽ (203 Czech Republic, belonging to the institution), Michal URBAN (703 Slovakia, belonging to the institution) and Petra ŠTĚPANČÍKOVÁ (203 Czech Republic)

Edition

Quaternary International, Oxford, PERGAMON-ELSEVIER SCIENCE LTD, 2017, 1040-6182

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10505 Geology

Country of publisher

Bonaire, Sint Eustatius and Saba

Confidentiality degree

není předmětem státního či obchodního tajemství

Impact factor

Impact factor: 2.163

RIV identification code

RIV/00216224:14310/17:00095477

Organization unit

Faculty of Science

DOI

UT WoS

000409352500004

Keywords in English

Active faulting;Paleoseismology;Slope deformation;Solifluction;Colluvium;Quaternary;Bohemian massif

Tags

Tags

International impact, Reviewed
Změněno: 3/4/2018 15:57, Ing. Nicole Zrilić

Abstract

V originále

Successions of colluvia and loesses covering the faults in the eastern and central parts of the Bohemian Massif were exposed in six trenches (two trenches at each fault, up to 6 m deep) and studied in detail in terms of stratigraphy and deformation. Based on OSL and radiocarbon ages these sediments were dated as Weichselian Early Glacial to Younger Dryas/Holocene (~120 ka to 11 ka). On the Kosíř fault (NW-SE strike), the offset strata bring evidence for Late Pleistocene oblique slip (normal and strike-slip components) on the main fault plane with minimum slip rate in order of 0.1 mm/a. Although the undisrupted topsoil suggests the absence of significant slip in Holocene and no clear evidence of paleoseismic events was found, this fault structure should be included in seismic hazard assessment. Conversely, on the Hluboká and Diendorf-Boskovice faults (NW-SE and NNE-SSW strikes, respectively), the tectonic slip is contradicted for the last 15-23 ka based on dating of undeformed strata sealing the fault planes. Multiple independent evidence suggests that these two faults were not active in Late Pleistocene at least and their prominent scarps is probably largely due to exhumation by differential denudation. Examples given document the mechanisms of slope-related deformations which may lead to destruction of the records of older faulting and occasionally produce deformation structures resembling the tectonic ones.

Links

GAP210/12/0573, research and development project
Name: Pozdně kvartérní seismogenní zlomová aktivita a související vývoj sedimentačních pánví ve východní části Českého masívu
Investor: Czech Science Foundation
LM2015079, research and development project
Name: Distribuovaný systém observatorních a terénních měření geofyzikálních polí (Acronym: CzechGeo/EPOS)
Investor: Ministry of Education, Youth and Sports of the CR