scholarly journals The 3-D Structural Model of an Out-of-Sequence Earthquake in China: Implication for the Reactivation of Positive Inversion Structures Along the Northern Tianshan Fold-and-Thrust Belt

Tectonics ◽  
2018 ◽  
Vol 37 (12) ◽  
pp. 4359-4376 ◽  
Author(s):  
Yiquan Li ◽  
Dongtao Wei ◽  
Hao Tian ◽  
Dong Jia ◽  
Lihua Fang ◽  
...  
Keyword(s):  
Structural Model ◽  
Thrust Belt ◽  
Fold And Thrust Belt ◽  
Northern Tianshan

Cenozoic tectonic patterns and their controls on growth strata in the northern Tianshan fold and thrust belt, northwest China

2020 ◽  
Vol 198 ◽  
pp. 104237 ◽  
Author(s):  
Yanxi Zhou ◽  
Chaodong Wu ◽  
Bo Yuan ◽  
Jialin Wang ◽  
Tianqi Zhou ◽  
...  
Keyword(s):  
Northwest China ◽  
Thrust Belt ◽  
Growth Strata ◽  
Fold And Thrust Belt ◽  
Northern Tianshan

Integrated multidisciplinary approach to constrain range fronts structure, a case study of the northern Tianshan piedmont (NW China)

2014 ◽  
Vol 185 (6) ◽  
pp. 379-392 ◽  
Author(s):  
Ke Chen ◽  
Charles Gumiaux ◽  
Romain Augier ◽  
Guillaume Martelet ◽  
Yan Chen ◽  
...  
Keyword(s):  
Data Analysis ◽  
Cross Section ◽  
Multidisciplinary Approach ◽  
Deep Structure ◽  
Thrust Belt ◽  
Seismic Profiles ◽  
Reflection Seismic ◽  
Fold And Thrust Belt ◽  
Northern Tianshan

Abstract Mountain fronts are key areas where to study the deformation mechanisms and the geodynamic evolution of orogenic belts. Different approaches based on either geological or geophysical data analysis have been proposed. However, in spite of recent theoretical and technical developments, these often remain within a single disciplinary framework and diverging views and models sometimes arise. The front of the northern Tianshan intracontinental collision range is thus quite exemplary for the variety of the tectonic models that have been proposed to explain its development. This paper introduces a multidisciplinary approach combining field geological/structural observations, reflection seismic profile interpretation, borehole results and a gravity study performed in the study area. This approach was conducted in the case study of a representative cross-section within the North Tianshan area, along the Jingou river. An extensive geological/structural survey across the fold and thrust belt was first carried out providing surface constraints on the shallowest parts of the section. Deep structure within the Junggar basin was constrained through processing and interpretation of reflection seismic data together with available borehole results. As it is often the case, the available seismic profiles do not extend to the frontal basement contact zone, or quality of the data was not good enough to allow interpretation. Consequently, a gravity survey and modelling finally allowed interpreting the deep structure of the cover/basement contact. By integrating all the data, the resulting regional-scale cross-section shows a new comprehensive image of the upper crustal structure in this area. In particular, results imply that the mountain basement thrust northwards onto the sedimentary layers with development of a second order fold. Besides, this study further suggests thick-skinned type deformations below the fold and thrust belt. From the example of the Jingou river section, this study illustrates the interest of incorporating gravity data analysis together with – more classical – seismic profiles interpretation and structural analyses for studying orogenic belt frontal areas.

scholarly journals Ongoing shortening in the Dinarides fold-and-thrust belt: A new structural model of the 1979 (Mw 7.1) Montenegro earthquake epicentral region

2020 ◽  
Vol 141 ◽  
pp. 104192
Author(s):  
Benjamin Schmitz ◽  
Peter Biermanns ◽  
Ralph Hinsch ◽  
Martin Ðaković ◽  
Kujtim Onuzi ◽  
...  
Keyword(s):  
Structural Model ◽  
Thrust Belt ◽  
Fold And Thrust Belt ◽  
Epicentral Region

Building a valid structural model in a triangle zone: An example from the Neuquén fold and thrust belt, Argentina

2015 ◽  
Vol 3 (4) ◽  
pp. SAA117-SAA131 ◽  
Author(s):  
Gonzalo Zamora-Valcarce ◽  
Tomás Zapata
Keyword(s):  
Structural Model ◽  
Seismic Interpretation ◽  
Fold Axis ◽  
Thrust Belt ◽  
Systematic Analysis ◽  
Triangle Zone ◽  
Fold And Thrust Belt ◽  
Basement Fault ◽  
New Interpretation ◽  
Surface Geology

Structural modeling and systematic analysis are necessary in complex areas even before seismic interpretation. Seismic data in these zones usually show poor-quality images of the geologic elements. Therefore, a detailed analysis of the available information (e.g., seismic, previous wells, and surface geology) is needed to build a comprehensive structural model to constrain the seismic interpretation. Although a restorable structural cross section is not necessarily the unique solution, it is a valid interpretation to begin with, which can be tested against additional information. As an example, a structural profile interpretation in the Agrio fold and thrust belt of the Neuquén Basin, northeastern Argentina, is presented and described as invalid on the basis of several unrestorable geometric components. This led to the reevaluation of the structure to understand its possible exploratory potential. Integration of different data such as regional structural styles inferred fault trajectories from seismic reflection termination patterns, synorogenic deposit geometries in seismic, and surface geology, dipmeter data to identify the presence and location of fault position and vergence of the fold axis, and a kinematic forward model, resulted in a new restorable structural model. The new interpretation proposes a “broken triangle zone” framed by two opposite surface anticlines with the same detachment level, later faulted by a basement fault. The interpreted model suggests at least two phases of deformation (1) a thin-skinned phase with the two opposite anticlines sharing the same detachment level that is responsible for about 80% of the shortening and (2) a thick-skinned phase from an east-verging basement fault, transporting the western anticline and crosscutting the eastern anticline, that is responsible for 20% of the shortening and the synorogenic deposits at the frontal region. This new interpretation defined a new exploration prospect drilled by a wildcat well, which validated the interpretation and model predictions.

Paleoseismology of a newly discovered scarp in the Yakima fold-and-thrust belt, Kittitas County, Washington

2013 ◽  
Author(s):  
Elizabeth A. Barnett ◽  
Brian L. Sherrod ◽  
Robert Norris ◽  
Douglas Gibbons
Keyword(s):  
Thrust Belt ◽  
Fold And Thrust Belt

QUANTIFYING SHORTENING ACROSS THE CENTRAL APPALACHIAN FOLD-AND-THRUST BELT OF WEST VIRGINIA

2016 ◽  
Author(s):  
Daniel Benjamin Lammie ◽  
◽  
Peter B. Sak ◽  
Nadine McQuarrie
Keyword(s):  
West Virginia ◽  
Thrust Belt ◽  
Fold And Thrust Belt
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