KINEMATICS OF THE COLUMBIA HILLS ANTICLINE AND THE WARWICK STRIKE-SLIP FAULT, YAKIMA FOLD AND THRUST BELT, WASHINGTON, USA

The Kohat fold and thrust belt, located in North-Western Pakistan, is a part of Lesser Himalaya developed due to the collision between the Indian and Eurasian plates. The structural evolution records of this area indicate that it consists of tight anticlines and broad syncline structures. Previous studies show that the structural pattern of this area has been produced due to multiple episodes of deformation. In the present research, 2D seismic data has been integrated with our field surveys to clarify the role of active strike-slip faulting in reshaping the surface structures of Shakardarra, Kohat. At the surface, doubly plunging anticlines and synclines are evolved on evaporites as detachment folds, truncated by thrust faults along their limbs. Seismic data show that the thrust faults originate from basal detachment located at the sedimentary-crystalline interface and either cut up section to the surface or lose their displacement to splay or back thrusts. At the surface, the Shakardarra Fault, the Tola Bangi Khel Fault, the Chorlaki Fault, and the axial trend of fold change their strike from EW to NS showing that the thrust and axial trend of folds are rotated along the vertical axis by the influence of the Kalabagh strike-slip fault. Strike-slip motion dominates the style of deformation at the northern segment. The current deformation is concentrated on the splay faults in the northern segment of the Kalabagh Fault. We propose that Shakardarra is sequentially evolved in three episodes of deformation. In the first phase, the detachment folds developed on Eocene evaporites, which are truncated by thrust faults originated from the basal detachment in the second phase. In the third phase, early formed folds and faults are rotated along the vertical axis by the influence of Kalabagh strike-slip fault.

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Cenozoic tectonic deformation along the Pontarlier strike‐slip fault zone (Swiss and French Jura fold‐and‐thrust belt): Insights from paleostress and geomorphic analyses

Tectonics ◽

10.1029/2021tc006758 ◽

2021 ◽

Author(s):

Omar M. A. Radaideh ◽

Jon Mosar

Keyword(s):

Fault Zone ◽

Strike Slip ◽

Strike Slip Fault ◽

Tectonic Deformation ◽

Thrust Belt ◽

Fold And Thrust Belt ◽

French Jura

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First evidence of active transpressive surface faulting at the front of the eastern Southern Alps, northeastern Italy. Insight on the 1511 earthquake seismotectonics

10.5194/se-2017-131 ◽

2018 ◽

Author(s):

Emanuela Falcucci ◽

Maria Eliana Poli ◽

Fabrizio Galadini ◽

Giancarlo Scardia ◽

Giovanni Paiero ◽

...

Keyword(s):

Strike Slip ◽

Southern Alps ◽

Strike Slip Fault ◽

Fault System ◽

The Past ◽

Fold And Thrust Belt ◽

Northeastern Italy ◽

Dextral Strike Slip Fault ◽

Seismic Lines ◽

Dextral Strike Slip

Abstract. We investigated the eastern corner of northeastern Italy, where the NW-SE trending dextral strike-slip fault systems of western Slovenia intersects the south-verging fold and thrust belt of the eastern Southern Alps . The area suffered the largest earthquakes of the region, among which are the 1511 (Mw 6.3) event and the two major shocks of the 1976 seismic sequence, with Mw = 6.4 and 6.1 respectively. The Colle Villano thrust and the Borgo Faris-Cividale strike-slip fault have been first analyzed by interpreting industrial seismic lines and then by performing morpho-tectonic and paleoseismological analyses. These different datasets indicate that the two structures define an active, coherent transpressive fault system that activated twice in the past two millennia, with the last event occurring around the 15th–17th century. The chronological information, and the location of the investigated fault system suggest its activation during the 1511 earthquake.

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Inversion tectonics, intracontinental fold-and-thrust belts and complex stress fields in central Europe: the history of the Franconian Basin revealed by paleostress analysis, geological maps and field observations.

10.5194/egusphere-egu2020-2601 ◽

2020 ◽

Author(s):

Saskia Köhler ◽

Florian Duschl ◽

Hamed Fazlikhani ◽

Daniel Köhn

Keyword(s):

Stress Field ◽

Late Cretaceous ◽

Complex Stress ◽

Strike Slip ◽

Stress Fields ◽

Thrust Belt ◽

Slip Regime ◽

Geological Maps ◽

Fold And Thrust Belt ◽

Paleostress Analysis

The Franconian Basin in SE Germany has seen a complex stress history indicative of several extensional and compressional phases e.g. the Iberia-Europe collision acting on a pre-faulted Variscan basement. Early Cretaceous extension is followed by Late Cretaceous inversion with syntectonic sedimentation and deformation increasing progressively from SW to NE culminating in the Franconian Line where basement rocks are thrusted over the Mesozoic cover. The development of this intracontinental fold-and-thrust belt is followed by Paleogene extension associated with the formation of the Eger Graben, which is then succeeded by a new compressional event as a consequence of the Alpine orogeny.We use existing data from literature and geological maps and new field data to construct balanced cross-sections in order to reveal the architecture of the Cretaceous fold-and-thrust belt. In addition, we undertake paleostress analysis using a combination of fault slip information, veins and tectonic and sedimentary stylolites to identify stress events in the study area, as well as their nature and timing. Furthermore, we try to understand how basement faults influence younger faults in the cover sequence.Our paleostress data indicates that at least five different stress events existed in Mesozoic to Cenozoic times (from old to young): (1) an N-S directed extensional stress field with E-W striking normal faults, (2) a NNE-SSW directed compressional stress field causing thrusting and folding of the cover sequence, (3) a strike slip regime with NE-SW compression and NW-SE extension, (4) an extensional event with NW-SE extension and the formation of ENE-WSW striking faults according to the formation of the Eger Graben in the E, and finally (5) a strike slip regime with NW-SE compression and NE-SW extension related to Alpine stresses. The geometry of faulting and deformation varies significantly over the regions with respect to the influence of and distance to inherited Variscan structures.We argue that the extensional event of stress field (1) provides spacing for Early Cretaceous sedimentation in the Franconian Basin. This is followed by the creation of an intracontinental fold-and-thrust belt during stress fields (2) and (3) with a slight rotation of the main compressive stress during these events in Late Cretaceous. We associate the following extension to the development of the Eger Graben in Miocene time. Finally, a NW-SE directed compression related to Alpine stresses in an intracontinental strike-slip regime is following. Reconstruction of the Cretaceous fold-and-thrust belt reveals mainly fault propagation folding with deep detachments sitting below the cover sequence indicating thick-skinned tectonics. We argue that the Franconian Line is a thrust with a steeply dipping root that belongs to the same fold-and-thrust belt.

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ACTIVE DEFORMATION IN THE NEW GUINEA FOLD-AND-THRUST BELT: SEISMOLOGICAL EVIDENCE FOR STRIKE-SLIP FAULTING AND BASEMENT-INVOLVED THRUSTING

Journal of Geophysical Research Atmospheres ◽

10.1029/jb093ib11p13332 ◽

1988 ◽

Vol 93 (B11) ◽

pp. 13332-13354 ◽

Cited By ~ 81

Author(s):

Geoffrey Abers ◽

Robert McCaffrey

Keyword(s):

New Guinea ◽

Strike Slip ◽

Thrust Belt ◽

Active Deformation ◽

Fold And Thrust Belt

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Quaternary slip-rates of the Kazerun and the Main Recent Faults: active strike-slip partitioning in the Zagros fold-and-thrust belt

Geophysical Journal International ◽

10.1111/j.1365-246x.2009.04191.x ◽

2009 ◽

Vol 178 (1) ◽

pp. 524-540 ◽

Cited By ~ 40

Author(s):

Christine Authemayou ◽

Olivier Bellier ◽

Dominique Chardon ◽

Lucilla Benedetti ◽

Zaman Malekzade ◽

...

Keyword(s):

Strike Slip ◽

Thrust Belt ◽

Slip Rates ◽

Fold And Thrust Belt ◽

Slip Partitioning

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Strike-slip reactivation of a Paleogene to Miocene fold and thrust belt along the central part of the Mid-Hungarian Shear Zone

Geologica Carpathica ◽

10.2478/v10096-010-0030-3 ◽

2010 ◽

Vol 61 (6) ◽

pp. 483-493 ◽

Cited By ~ 8

Author(s):

Márton Palotai ◽

László Csontos

Keyword(s):

Shear Zone ◽

Seismic Data ◽

Tectonic Evolution ◽

Strike Slip ◽

3D Seismic ◽

Thrust Belt ◽

Clockwise Rotation ◽

Fold And Thrust Belt ◽

Detailed Interpretation ◽

3D Seismic Data

Strike-slip reactivation of a Paleogene to Miocene fold and thrust belt along the central part of the Mid-Hungarian Shear ZoneRecently shot 3D seismic data allowed for a detailed interpretation, aimed at the tectonic evolution of the central part of the Mid-Hungarian Shear Zone (MHZ). The MHZ acted as a NW vergent fold and thrust belt in the Late Oligocene. The intensity of shortening increased westwards, causing clockwise rotation of the western regions, relatively to the mildly deformed eastern areas. Blind thrusting and related folding in the MHZ continued in the Early Miocene. Thrusting and gentle folding in the MHZ partly continued in the earliest Pannonian, and was followed by sinistral movements in the whole MHZ, with maximal displacement along the Tóalmás zone. Late Pannonian inversion activated thrusts and generated transpressional movements along the Tóalmás zone.

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