The structural and stratigraphic evolution of the La Rioja basin, Argentina

Fisher, Nathan D; Jordan, Teresa E.; Brown, L. D.

doi:10.1016/s0895-9811(02)00010-x

Cited by 21 publications

(39 citation statements)

References 10 publications

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“…This reverse fault is in the epicentral region of the 28 May 2002 earthquake. A series of minor synthetic secondary west-dipping faults were recognized at these latitudes at the subsurface in seismic lines by Fisher et al (2002). In the surface, Quaternary deposits are affected by east verging thrusts providing evidences of an active uplift of the low relief hills north of La Rioja city.…”

Section: Description Of the Structurementioning

confidence: 95%

“…2). Overall, the Sierra de Ambato and its eastern region are dominated by west vergence reverse faults while the Sierra de Velasco and the southward region exhibit east vergence reverse faults (Ramos, 1999;Fisher et al, 2002;Ramos et al, 2002). This opposite vergence was explained by different mechanisms through time, mainly regarding to the intensive imbrications observed in the Ambato block east of the Sierra de Ambato (see Figs.…”

Section: Description Of the Structurementioning

confidence: 99%

“…Parameters for each fault-plane solution follow the same convention used by Alvarado et al (2005a). References: AA, Assumpç ão and APM, Araujo et al, 2005 (Ramos, 1999;Fisher et al, 2002;Costa, 2008). Focal mechanisms in lower hemisphere projection and source depths in parentheses from waveform modelling are shown for the larger crustal earthquakes (magnitudes between 4.0 and 6.2) (see Table 1 for references).…”

Section: Seismotectonic Settingmentioning

confidence: 99%

“…Also shown are GPS velocity vectors and their 95% confidence ellipses from Brooks et al (2003). Location of a possible accommodation zone (long dashed lines) and seismic reflexion lines (short dashed lines) are after Fisher et al (2002). earthquakes that occurred in the northern part of the studied region was obtained from the Harvard centroid moment tensor (Harvard CMT) catalogue (Fig.…”

Section: Seismotectonic Settingmentioning

confidence: 99%

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Earthquake deformation in the northwestern Sierras Pampeanas of Argentina based on seismic waveform modelling

Alvarado

Ramos

2011

Journal of Geodynamics

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Section: Description Of the Structurementioning

confidence: 95%

Section: Description Of the Structurementioning

confidence: 99%

Section: Seismotectonic Settingmentioning

confidence: 99%

Section: Seismotectonic Settingmentioning

confidence: 99%

See 2 more Smart Citations

Earthquake deformation in the northwestern Sierras Pampeanas of Argentina based on seismic waveform modelling

Alvarado

Ramos

2011

Journal of Geodynamics

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“…In addition, the anticlines in New Zealand have formed small drainage basins at the boundaries of the structures with rivers oriented almost parallel to the strike of the anticlines. Linear rivers that flow parallel to the transport direction, where bifurcation of the streams increases towards the drainage divide (crest), and small sub-basins that form at the boundaries of the structures with rivers running almost parallel to the strike direction are also observed in other contractional structures such as the Wheeler Ridge anticline ( [23,72]; Figure 1d), Santa Monica mountains [73], and Oak Ridge anticline [74] in California; East Bourland mountain, Marathon fold and thrust belt [75], and anticlines in the La Rioja basin, Argentina [76] and Nepalese Himalaya [35]. …”

Section: River Network Developed Above Fault-related Fold Structuresmentioning

confidence: 99%

Three-Dimensional Growth of Flexural Slip Fault-Bend and Fault-Propagation Folds and Their Geomorphic Expression

Bernal¹,

Hardy

Gawthorpe³

2018

Geosciences

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Abstract:The three-dimensional growth of fault-related folds is known to be an important process during the development of compressive mountain belts. However, comparatively little is known concerning the manner in which fold growth is expressed in topographic relief and local drainage networks. Here we report results from a coupled kinematic and surface process model of fault-related folding. We consider flexural slip fault-bend and fault-propagation folds that grow in both the transport and strike directions, linked to a surface process model that includes bedrock channel development and hillslope diffusion. We investigate various modes of fold growth under identical surface process conditions and critically analyse their geomorphic expression. Fold growth results in the development of steep forelimbs and gentler, wider backlimbs resulting in asymmetric drainage basin development (smaller basins on forelimbs, larger basins on backlimbs). However, topographies developed above fault-propagation folds are more symmetric than those developed above fault-bend folds as a result of their different forelimb kinematics. In addition, the surface expression of fault-bend and fault-propagation folds depends both on the slip distribution along the fault and on the style of fold growth. When along-strike plunge is a result of slip events with gently decreasing slip towards the fault tips (with or without lateral propagation), large plunge-panel drainage networks are developed at the expense of backpanel (transport-opposing) and forepanel (transport-facing) drainage basins. In contrast, if the fold grows as a result of slip events with similar displacements along strike, plunge-panel drainage networks are poorly developed (or are transient features of early fold growth) and restricted to lateral fold terminations, particularly when the number of propagation events is small. The absence of large-scale plunge-panel drainage networks in natural examples suggests that the latter mode of fold growth may be more common. The advective component of deformation (implicit in kink-band migration models of fault-bend and fault-propagation folding) exerts a strong control on drainage basin development. In particular, as drainage lengthens with fold growth, more linear, parallel drainage networks are developed as compared to the dendritic patterns developed above simple uplifting structures. Over the 1 Ma of their development the folds modelled here only attain partial topographic equilibrium, as new material is continually being advected through active axial surfaces on both fold limbs and faults are propagating in both the transport and strike directions. We also find that the position of drainage divides at the Earth's surface has a complex relationship to the underlying fold axial surface locations.

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Titanosaur dinosaurs from the Upper Cretaceous of La Rioja province, NW Argentina

Hechenleitner

Fiorelli

Martinelli

et al. 2018

Cretaceous Research

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The structural and stratigraphic evolution of the La Rioja basin, Argentina

Cited by 21 publications

References 10 publications

Earthquake deformation in the northwestern Sierras Pampeanas of Argentina based on seismic waveform modelling

Earthquake deformation in the northwestern Sierras Pampeanas of Argentina based on seismic waveform modelling

Three-Dimensional Growth of Flexural Slip Fault-Bend and Fault-Propagation Folds and Their Geomorphic Expression

Titanosaur dinosaurs from the Upper Cretaceous of La Rioja province, NW Argentina

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