2003
DOI: 10.2747/0020-6814.45.7.575
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How Laramide-Age Hydration of North American Lithosphere by the Farallon Slab Controlled Subsequent Activity in the Western United States

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Cited by 344 publications
(347 citation statements)
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“…[52] If we have interpreted the data correctly, then most of the uplift of the south-central portion of the Colorado Plateau occurred during Late Cretaceous/earliest Tertiary time (Figure 10), favoring uplift mechanisms such as crustal thickening by lateral flow of deep crust [McQuarrie and Chase, 2000], hydration of the mantle lithosphere due to volatile flux from a newly arrived Laramide flat slab [Humphreys et al, 2003], or dynamic topography associated with slab foundering [Liu and Gurnis, 2008]. We are careful to point out that our estimate of paleoelevation may not apply to the northern part of the plateau.…”
Section: Resultsmentioning
confidence: 99%
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“…[52] If we have interpreted the data correctly, then most of the uplift of the south-central portion of the Colorado Plateau occurred during Late Cretaceous/earliest Tertiary time (Figure 10), favoring uplift mechanisms such as crustal thickening by lateral flow of deep crust [McQuarrie and Chase, 2000], hydration of the mantle lithosphere due to volatile flux from a newly arrived Laramide flat slab [Humphreys et al, 2003], or dynamic topography associated with slab foundering [Liu and Gurnis, 2008]. We are careful to point out that our estimate of paleoelevation may not apply to the northern part of the plateau.…”
Section: Resultsmentioning
confidence: 99%
“…upper mantle, or the introduction of volatiles to the upper mantle [e.g., Bird, 1979;McQuarrie and Chase, 2000;Humphreys et al, 2003]; (2) mid-Tertiary uplift related to the demise of a Laramide flat slab, where buoyancy is added to the upper mantle by mechanical thinning or chemical modification of the lithosphere [Spencer, 1996;Roy et al, 2005]; and (3) late Tertiary "epeirogenic" uplift associated with regional extensional tectonism, either by convective removal of lithosphere or heating from below [e.g., Bird, 1979;Thompson and Zoback, 1979;Humphreys, 1995;Parsons and McCarthy, 1995;Jones et al, 2004;Zandt et al, 2004]. Quantitative constraints on the timing of uplift therefore have the potential to falsify one or more of these hypotheses.…”
Section: Mechanisms Driving Plateau Uplift and Existing Paleoelevatiomentioning
confidence: 99%
“…Sin embargo, la fertilidad de la litósfera puede haber sido incrementada por fenómenos ocurridos anteriormente a los pulsos ignimbríticos. Humphreys et al (2003) han propuesto que la subducción subhorizontal de la placa Farallón, ocurrida durante la orogenia Laramide, habría producido una hidratación y fertilización signifi cativa de la placa Norteamericana (precámbrica); posteriormente, una vez removida la placa en el Terciario, el calentamiento inducido por la exposición al manto astenosférico habría redundado en una "explosión" de volcanismo silícico. Este modelo, propuesto para explicar el volcanismo silícico terciario del suroeste de Estados Unidos puede igualmente aplicarse a la SMO, que comparte una historia tectónica similar con el sur de Estados Unidos.…”
Section: Génesis Del Magmatismo Silícicounclassified
“…Para fi nales del Cretácico (~70 Ma), el ángulo de la placa subducida se redujo considerablemente debido al aumento en la velocidad de la convergencia de las placas, alejando la cuña de manto astenosférico en relación a la trinchera, lo cual se explica de manera esquemática en la Figura 7. El alejamiento de la astenósfera causó una migración acelerada del eje del magmatismo hacia el este, desde las regiones costeras hacia el interior del continente, alcanzando el máximo avance entre los 55 y 40 Ma (Damon et al, 1983a;Humphreys et. al., 2003).…”
Section: Corteza Oceánicaunclassified