The Late Cretaceous fold-thrust belt in the Peña de Bernal–Tamazunchale area and its possible relationship to the accretion of the Guerrero Terrane

2012 ◽  
pp. 19-38 ◽  
Author(s):  
Michelangelo Martini ◽  
Elisa Fitz ◽  
Luigi Solari ◽  
Antoni Camprubi ◽  
Peter J. Hudleston ◽  
...  
Keyword(s):  
Late Cretaceous ◽  
Thrust Belt ◽  
Guerrero Terrane

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.

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

<p>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.</p><p>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.</p><p>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.</p><p>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.</p>

Late Cretaceous extension in the hinterland of the Sevier thrust belt, northwestern Utah and southern Idaho

Geology ◽  
1990 ◽  
Vol 18 (10) ◽  
pp. 929 ◽  
Author(s):  
Michael L. Wells ◽  
R. David Dallmeyer ◽  
Richard W. Allmendinger
Keyword(s):  
Late Cretaceous ◽  
Thrust Belt

scholarly journals The Tectonic event of the Zaire-Hala’alate thrust belt in Junggar Basin,China

2021 ◽  
Vol 937 (4) ◽  
pp. 042090
Author(s):  
Jinghui Ma ◽  
Lishang Nie ◽  
Changcheng Han
Keyword(s):  
Early Cretaceous ◽  
Late Cretaceous ◽  
Thermal History ◽  
Fission Track ◽  
Junggar Basin ◽  
Tectonic Activity ◽  
Thrust Belt ◽  
Tectonic Event ◽  
Intensity Effect ◽  
Activity Intensity

Abstract The Yanshanian tectonic activity intensity effect of The Zaire- Hala’alate thrust belt, which is located in the northwest margin of Junggar Basin, have been in dispute for a long time. The distribution characteristics of the FT peak age in the narrower time domain is the key to understanding the dynamic mechanism of this important intracontinental deformation. In this study, apatite fission track dating and thermal history simulation analysis were carried out on 6 samples collected from this area. The results show that the fission track ages are mainly distributed in three intervals, corresponding to the geological ages of 130∼128Ma, 92∼89Ma and 72Ma, reflecting the obvious cooling and uplifting events in the three periods. At the same time, the thermal history simulation shows that the region experienced three rapid uplift events in the Early Cretaceous, the Early Late Cretaceous and the Late Cretaceous-Eocene. The comprehensive study shows that the main thrust fold in this area started from the end of Early Cretaceous, and the tectonic movement was the most intense in Late Cretaceous. As a whole, Tectonic activity migrated from south to north, which shows a retro-thrust expansion from the basin to the orogenic belt.

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