Active intracontinental transpressional mountain building in the Mongolian Altai: Defining a new class of orogen

Cunningham, Dickson

doi:10.1016/j.epsl.2005.09.013

Cited by 187 publications

(155 citation statements)

References 30 publications

Supporting

Mentioning

149

Contrasting

Order By: Relevance

“…It is comprised of Chapada Diamantina Ocidental Fold Thrust Belt, eastwards, and Northern Espinhaço Setentrional Fold Thrust Belt, westwards. These belts signalize the evolution of an Intracontinental Orogen, similar to what was described by Cunningham (2005Cunningham ( , 2013.…”

Section: Introductionmentioning

confidence: 81%

“…One of the clearest examples of tectonic reactivation is the nucleation of reverse fault from existing normal faults in continental margins, which is known as the process of positive tectonic inversion (Letouzey 1990). The inversion of deformational structures has been recognized in intracontinental domains (for example Ziegler 1983, Letouzey 1990, Charrier et al 2002, Cunningham 2005, 2013, in active continental margins, and in collisional environments (Ziegler 1983, Butler et al 2006, Dhahri & Boukadi 2010. This process is well recorded in sectors that undergo several superimposed subsidence pulses, in areas where compression has affected a stratigraphic pile deposited in an extensional environment or even in reverse shear zones that were reactivated as normal ones (negative inversion) (Allmendinger et al 1983, Jolivet et al 1991, Faccenna et al 1995.…”

Section: Introductionmentioning

confidence: 84%

“…The collisions . The northern extremity of Paramirim Aulacogen presents reactivation and inversion evidence of its extensional structures and of a mountain range construction within the intracontinental domain (sensu Cunningham 2005Cunningham , 2013 of Araçuaí-West Congo Orogen, which is represented through Espinhaço Setentrional and Chapada Diamantina Fold Thrust Belts in the Paramirim Corridor. This mountain range was most likely formed as the result of a reflex effect related to a regional shortening due to the formation of Western Gondwana .…”

Section: Discussionmentioning

confidence: 99%

“…Most deformation imprinted on old continental blocks is accommodated with reactivation of pre-existing structures (Charrier et al 2002, Butler et al 2006, Cunningham 2005, 2013. One of the clearest examples of tectonic reactivation is the nucleation of reverse fault from existing normal faults in continental margins, which is known as the process of positive tectonic inversion (Letouzey 1990).…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Tectonic inversion of compressional structures in the Southern portion of the Paramirim Corridor, Bahia, Brazil

et al. 2015

View full text Add to dashboard Cite

ABSTRACT:The Paramirim Corridor represents the maximum inversion zone of the Paramirim Aulacogen. Reverse-to-reverse dextral shear zones and various types of folds dominate such corridor. These structures reflect a stress field that is WSW-ENE oriented, developed in units of Aulacogen basement, as well as in the Lagoa Real Intrusive Suite, of Statherian age, in Espinhaço and São Francisco supergroups, of Statherian-Tonian and Cryogenian ages, respectively, and in the Macaúbas-Santo Onofre Group, of Tonian age at the most. A rich collection of extensional structures truncate compressional structures of the Paramirim Corridor, characterized by normal shear zones and foliation, which is sometimes mylonitic, down-dip stretching lineation, drag folds, traction fractures and S/C structures. In these shear zones, quartz occurs truncated by the foliation, while feldspars are fractured and altered to white mica. Distribution of the quartz c-axes is at a maximum of 14° from the Z-axis. Thus, it suggests that the deformation activated mainly the basal glide planes in the direction. The paleostress study using the Win-Tensor software demonstrated that the regimen ranged between radial and pure distention. The S 1 direction oscillated around a vertical trend, while s 3 was sub-horizontal, with a predominant N230-050° direction. Ar-Ar ages in biotite obtained from the extensional shear zones ranged from 480 and 490 Ma. Together, data obtained for the structures associated with the late extensional regimen described in the present study suggest that its nucleation is associated with distal and brittle-ductile sectors of the gravitational collapse zone of Araçuaí-West Congo Orogen.KEYWORDS: Shear Zone; Paramirim Corridor; Gravitational Collapse. RESUMO: O Corredor do Paramirim representa a zona de máxima inversão do Aulacógeno do Paramirim, no qual predominam zonas de cisalhamento reversas-reversas destrais e vários tipos de dobras. Essas estruturas refletem um campo de tensão segundo WSW-ENE, os quais se desenvolvem nas unidades de embasamento do Aulacógeno, assim como na Suíte Intrusiva Lagoa Real, de idade estateriana, nos supergrupos Espinhaço e São Francisco, de idades estateriana-toniana e criogeniana, respectivamente, bem como no grupo Macaúbas-Santo

show abstract

Section: Introductionmentioning

confidence: 81%

Section: Introductionmentioning

confidence: 84%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Tectonic inversion of compressional structures in the Southern portion of the Paramirim Corridor, Bahia, Brazil

et al. 2015

View full text Add to dashboard Cite

show abstract

“…Transpressional orogens host the combination of thrusts and strike slip faults (Cunningham 2005(Cunningham , 2007. Having described both thrusts (Csontos and Nagymarosy 1998;Csontos et al 2005;Palotai and Csontos 2010; and this study) and strike-slip faults (Balla and Dudko 1989;Fodor et al 1999;Ruszkiczay-Rüdiger et al 2007;Fodor 2010;, the Oligocene to Middle Miocene MidHungarian Shear Zone can be regarded as a transpressional orogen, with varying significance of shortening and strike-slip in time.…”

Section: Regional Correlationmentioning

confidence: 99%

Flexural basin reworked by salt-related pull-apart structures: the Adony Basin

Palotai¹,

Csontos²

2012

Central European Geology

View full text Add to dashboard Cite

Several main tectonic lineaments originating in the Alps and Dinarides merge in Central Hungary to form the Mid-Hungarian Shear Zone. As these structures are hidden beneath sub-basins of the Neogene Pannonian Basin, it has long been debated whether the tectonic style of the shear zone is mainly contractional or strike-slip. New 3D seismic data allowed a detailed analysis of one of these sub-basins, the Adony Basin, located south of Budapest. Its evolution is linked to the tectonics between the southern Tisza unit of European passive margin affinity, the northern ALCAPA block with Alpine affinity, and sheared remnants of Dinaric units in between. During the Oligocene and Early to Middle Miocene, a flexural basin related to the convergent thrusting of Dinaric-and ALCAPA-derived units was developed. On the southern side, N-NW verging thrust sheets were observed. On the opposite front, Triassic carbonates of ALCAPA were thrust several kilometres above Palaeogene formations to the SW. Dextral transpression is assumed for the Middle Miocene. Local deposition of Middle Miocene salt in the basin formed a detachment surface. Late Miocene sinistral strike-slip faulting resulted in a pull-apart basin above that part of the earlier flexural basin that has not been overthrust. The margins of the basin coincided with the fronts of earlier thrusts. Faults on the basin margins partly detached on the salt, decoupling the supra-salt basin fill from the underlying formations. Within the pull-apart basin, gravity sliding on the steep margins resulted in salt welds, detachment and roll-over folds.

show abstract

Repeated large‐magnitude earthquakes in a tectonically active, low‐strain continental interior: The northern Tien Shan, Kyrgyzstan

et al. 2016

View full text Add to dashboard Cite

The northern Tien Shan of Kyrgyzstan and Kazakhstan has been affected by a series of major earthquakes in the late 19th and early 20th centuries. To assess the significance of such a pulse of strain release in a continental interior, it is important to analyze and quantify strain release over multiple time scales. We have undertaken paleoseismological investigations at two geomorphically distinct sites (Panfilovkoe and Rot Front) near the Kyrgyz capital Bishkek. Although located near the historic epicenters, both sites were not affected by these earthquakes. Trenching was accompanied by dating stratigraphy and offset surfaces using luminescence, radiocarbon, and 10Be terrestrial cosmogenic nuclide methods. At Rot Front, trenching of a small scarp did not reveal evidence for surface rupture during the last 5000 years. The scarp rather resembles an extensive debris‐flow lobe. At Panfilovkoe, we estimate a Late Pleistocene minimum slip rate of 0.2 ± 0.1 mm/a, averaged over at least two, probably three earthquake cycles. Dip‐slip reverse motion along segmented, moderately steep faults resulted in hanging wall collapse scarps during different events. The most recent earthquake occurred around 3.6 ± 1.3 kyr ago (1σ), with dip‐slip offsets between 1.2 and 1.4 m. We calculate a probabilistic paleomagnitude to be between 6.7 and 7.2, which is in agreement with regional data from the Kyrgyz range. The morphotectonic signals in the northern Tien Shan are a prime example of deformation in a tectonically active intracontinental mountain belt and as such can help understand the longer‐term coevolution of topography and seismogenic processes in similar structural settings worldwide.

show abstract

Active intracontinental transpressional mountain building in the Mongolian Altai: Defining a new class of orogen

Cited by 187 publications

References 30 publications

Tectonic inversion of compressional structures in the Southern portion of the Paramirim Corridor, Bahia, Brazil

Tectonic inversion of compressional structures in the Southern portion of the Paramirim Corridor, Bahia, Brazil

Flexural basin reworked by salt-related pull-apart structures: the Adony Basin

Repeated large‐magnitude earthquakes in a tectonically active, low‐strain continental interior: The northern Tien Shan, Kyrgyzstan

Contact Info

Product

Resources

About