IMHE OpenIR  > Journal of Mountain Science  > Journal of Mountain Science-2015  > Vol12 No.2
Tectonic Phase Separation Applied to the Sudetic Marginal Fault Zone (NE part of the Czech Republic)
NOVAKOVA Lucie
Corresponding AuthorNOVAKOVA Lucie
2015-03
Source PublicationJournal of Mountain Science
ISSN1672-6316
Volume12Issue:2Pages:251-267
Subtype期刊论文
AbstractThis study emphasizes the advantage of tectonic phase separation in determination of a tectonic evolution of complicated fault zones. The research focused onthe Sudetic Marginal Fault Zone (SMFZ) –a 250 km long active fault zone with documented intraplate seismicity situated on the NE margin ofthe Bohemian Massif (the Czech Republic). The tectonic history of the SMFZ aswell as its kinematic development has been rather complicated and not quite understood. A field structural investigation was carried out in extensive surroundings of the fault zone. The fault-slip data were collectedin a number of natural outcrops and quarries with the aim atestablishing a robust and field-constrained model forlocal brittle structural evolution of the studied area. A paleostress analysis was calculated using the collected fault-slip data inversion. The T-Tecto software was utilized for semi-automatic separation of the paleostress phases. Simultaneously three methods of data separation were employed: (1) the Gauss inverse method, (2) the Visualization of Gauss object Function, and (3) the frequency analysis. Within the faultzonemultiphase movements were observedon various types of faults as well as wide range of the kinematic indicators orientations. The frequency analysis confirmed the multiphase history of the SMFZ. The calculated tectonic phases were divided accordingto their relative age as constrained by cross cutting relationships and, where observed, multiple striationson a single fault plane and classified from the oldest to the younger. Data separation and inversion using T-Tecto software with the Gauss inverse methodrevealedfour different stress phases which are 3 strike-slip stress regimes and one compressional regime. The strike-slip regimes are characterized by σ1 trending NW-SE (43), NNE-SSW (18), ENE-WSW (76) and the compressional one by σ1 trending W-E (26). First, compression occurred parallel to the SMFZ supposedly during the Variscan period. Second, compression at an angle of 60° to general direction of the SMFZ yielded right-lateral movement along the fault zone. This is considered to have occurred during the late-Variscan and post-Variscan period. Third, compression in theW-E direction with almost vertical extension led to reverse movement along the fault zone. This is considered to have occurred during Cenozoic. Fourth, compression almost perpendicular to the SMFZ led to left-lateral transpression along the SMFZ. This is considered to have occurred during Quaternary.
KeywordSudetic Marginal Fault Zone Paleostress Reconstruction Active Tectonics Frequency Analysis
DOI10.1007/s11629-014-3297-5
Indexed BySCI
Language英语
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/7966
CollectionJournal of Mountain Science_Journal of Mountain Science-2015_Vol12 No.2
Corresponding AuthorNOVAKOVA Lucie
Recommended Citation
GB/T 7714
NOVAKOVA Lucie. Tectonic Phase Separation Applied to the Sudetic Marginal Fault Zone (NE part of the Czech Republic)[J]. Journal of Mountain Science,2015,12(2):251-267.
APA NOVAKOVA Lucie.(2015).Tectonic Phase Separation Applied to the Sudetic Marginal Fault Zone (NE part of the Czech Republic).Journal of Mountain Science,12(2),251-267.
MLA NOVAKOVA Lucie."Tectonic Phase Separation Applied to the Sudetic Marginal Fault Zone (NE part of the Czech Republic)".Journal of Mountain Science 12.2(2015):251-267.
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