Channel incision in the Rio Atenguillo, Jalisco, Mexico, defined by 36Cl measurements of bedrock

Righter, K.; Caffee, Marc W.; Rosas-Elguera, José; Valencia, Víctor A.

doi:10.1016/j.geomorph.2010.04.001

Cited by 24 publications

(11 citation statements)

References 73 publications

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“…Nevertheless, the effect of opening the formerly closed intrabasinal drainage has resulted in a dramatic base-level drop. In terms of enhanced incision and long-profile re-equilibration, the effect of this 700 m baselevel drop could produce equivalent results linked to uplift in more tectonically active areas (Lave and Avouac, 2001;Seong et al, 2008;Righter et al, 2010). Many arguments have been made that incision is proportional to water discharge or water variability (Tucker and Bras, 2000;Snyder et al, 2003;Tucker, 2004).…”

Section: Analysis Of Terrestrial Cosmogenic Nuclide Datamentioning

confidence: 99%

Quantification of fluvial incision in the Duero Basin (NW Iberia) from longitudinal profile analysis and terrestrial cosmogenic nuclide concentrations

et al. 2012

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Section: Analysis Of Terrestrial Cosmogenic Nuclide Datamentioning

confidence: 99%

Quantification of fluvial incision in the Duero Basin (NW Iberia) from longitudinal profile analysis and terrestrial cosmogenic nuclide concentrations

et al. 2012

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“…Uplifted marine terraces, the history of magmatism and river incision, and thermochronometric data show that Mexico and its surroundings have been uplifted by > 1 km and eroded since 50 Ma [e.g., Righter, 1997;Gray et al, 2003;Montgomery and Lopez-Blanco, 2003;Righter et al, 2010;Ferrari et al, 2012]. Widespread, flat-lying, post-Paleocene sedimentary stratigraphy indicate that surface strain rates have been low during this time, which is consistent with thermobarometric studies that indicate lithospheric shortening ceased at $50 Ma [e.g., Suter, 1984;Gray et al, 2003;Barra et al, 2005].…”

Section: Introductionmentioning

confidence: 99%

A Cenozoic uplift history of Mexico and its surroundings from longitudinal river profiles

Stephenson

Roberts

Hoggard

et al. 2014

Geochem Geophys Geosyst

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Geodynamic models of mantle convection predict that Mexico and western North America share a history of dynamic support. We calculate admittance between gravity and topography, which indicates that the elastic thickness of the plate in Mexico is 11 km and in western North America it is 12 km. Admittance at wavelengths > 500 km in these regions suggests that topography is partly supported by subcrustal processes. These results corroborate estimates of residual topography from isostatic calculations and suggest that the amount of North American topography supported by the mantle may exceed 1 km. The Cenozoic history of magmatism, sedimentary flux, thermochronometric denudation estimates, and uplifted marine terraces imply that North American lithosphere was uplifted and eroded during the last 30 Ma. We jointly invert 533 Mexican and North American longitudinal river profiles to reconstruct a continent-scale rock uplift rate history. Uplift rate is permitted to vary in space and time. Erosional parameters are calibrated using incision rate data in southwest Mexico and the Colorado Plateau. Calculated rock uplift rates were 0.15-0.2 mm/yr between 25 and10 Ma. Central Mexico experienced the highest uplift rates. Central and southern Mexico continued to uplift at 0.1 mm/yr until recent times. This uplift history is corroborated by independent constraints. We predict clastic flux to the Gulf of Mexico and compare it to independent estimates. We tentatively suggest that the loop between uplift, erosion, and deposition can be closed here. Mexico's staged uplift history suggests that its dynamic support has changed during the last 30 Ma.

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“…Cocos Plate, Atwater, 1970), uplift of crustal blocks with fault system outlining them (e.g. Jalisco and Michoacán blocks) (Rosas-Elguera et al, 1996;Righter et al, 2010) and magmatic arcs (e.g. Paleocene-Early Oligocene magmatism and the Trans-Mexican Volcanic Belt, Ferrari et al, 2002;MoranZenteno et al, 2007).…”

Section: Main Results and Discussionmentioning

confidence: 99%

Paleomagnetic and rock-magnetic survey of eocene dike swarms from the Tecalitlan area (Western Mexico): Tectonic implications

et al. 2011

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For long time the western-central Mexico has been affected by oblique subduction caused by Farallon plate beneath North America. As result, smaller plates (e.g. Cocos Plate), several fault systems outlining crustal blocks (e.g. Michoacán block) and magmatic arcs (e.g. Paleocene-Early Oligocene magmatism and the Trans-Mexican Volcanic Belt) were developed. Still, no paleomagnetic data are available for Oligocene and Miocene. The principal aim of this study is to evaluate whether the tectonic rotations and relative motions of these blocks occurred before the Miocene. Here, we report a detailed rock-magnetic and paleomagnetic results from Tecalitlan area, located in the Michoacán block. Sixteen sites (about 150 oriented samples) were collected including one radiometrically dated diabase dike (35.0 ± 1.8 Ma). Rock-magnetic experiments permitted identification of magnetic carriers and assessment of the paleomagnetic stability. Continuous susceptibility measurements vs temperature in most cases yield reasonably reversible curves with Curie points close to that of magnetite. Reliable paleomagnetic directions were obtained for 12 sites. Inclination I and declination D of the mean paleomagnetic direction obtained in this study are I = 33.1°, D = 345.0°, and Fisherian statistical parameters are k = 25,  95 = 8.9°. The corresponding mean paleomagnetic pole position is P lat = 75.7°, P long = 166.6°, K = 31, A 95 = 8.0°. The mean inclination is in Continuation of LATINMAG Special Issue #4, Stud. Geophys. Geod., 54 (2010) J. Rosas-Elguera et al. 266 Stud. Geophys. Geod., 55 (2011) reasonably good agreement with the expected value, as derived from reference poles for the stable North America. Magnetic declination is not significantly different from that expected which is in disagreement with a counterclockwise tectonic rotation of about 20º previously reported for the studied area. Based on paleomagnetic results obtained in this study compiled with those currently available from the Michoacán Block, we propose a simple model suggesting that sometime in Eocene epoch the convergence vector of the Farallon plate relative to North America plate was normal to the trench before reaching an actual oblique convergence.

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Channel incision in the Rio Atenguillo, Jalisco, Mexico, defined by 36Cl measurements of bedrock

Cited by 24 publications

References 73 publications

Quantification of fluvial incision in the Duero Basin (NW Iberia) from longitudinal profile analysis and terrestrial cosmogenic nuclide concentrations

Quantification of fluvial incision in the Duero Basin (NW Iberia) from longitudinal profile analysis and terrestrial cosmogenic nuclide concentrations

A Cenozoic uplift history of Mexico and its surroundings from longitudinal river profiles

Paleomagnetic and rock-magnetic survey of eocene dike swarms from the Tecalitlan area (Western Mexico): Tectonic implications

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