Toward quantifying geomorphic rates of crustal displacement, landscape development, and the age of glaciation in the Venezuelan Andes

Wesnousky, Steven G.; Aranguren, R Carmen; Rengifo, Martín; Owen, Lewis A.; Caffee, Marc W.; Murari, Madhav K.; Pérez, Omar J.

doi:10.1016/j.geomorph.2011.12.028

Cited by 24 publications

(35 citation statements)

References 63 publications

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“…10 Ma) to present (Kohn et al, 1984;Pindell et al, 1998). Quaternary uplift ranges between ~0.7 and 5 mm/a (Audemard and Audemard, 2002;Wesnousky et al, 2012;Guzmán et al, 2013).…”

Section: Venezuelamentioning

confidence: 96%

“…These glacial landforms have been studied in the Sierra Nevada (including Sierra de Santo Domingo) (e.g. Mahaney et al, 2008;Stansell et al, 2007;Wesnousky et al, 2012;Carcaillet et al, 2013;Angel, 2016), Sierra del Norte (e.g. Wesnousky et al, 2012;Angel, 2016) and Cordillera de Trujillo (e.g Bezada, 1989;Mahaney et al, 2001;Guzmán, 2013;Angel, 2016) (Fig.…”

Section: Venezuelamentioning

confidence: 99%

“…and dated to a weighted average age of 17.45 ± 0.47 ka (Angel, 2016). Another LGM-OtD glacier advance has been constrained at the Los Zerpa terminal moraine located at ~3100 m a.s.l., and a weighted average exposure age of 18.30 ± 0.46 ka (modified ages of Wesnousky et al, 2012in Angel, 2016. All these moraines (La Victoria, Los Zerpa) chronological data, is based on TCN- 10 Be of frontal moraine boulders.…”

Section: Venezuelamentioning

confidence: 99%

“…Rull, 1998;Mahaney et al, 2001;Dirszowsky et al, 2005;Stansell et al, 2005;Mahaney et al, 2007;Carrillo et al, 2008;Kalm and Mahaney, 2011). However, more recently contributions based on Terrestrial Cosmogenic Nuclide dating (TCN), specifically 10 Be of moraine boulders and roches moutonnées are available (Wesnousky et al, 2012;Angel et al, 2013;Carcaillet et al, 2013;Guzmán, 2013;Angel, 2016;Angel et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

“…It is also important to note that different scaling schemes and production rates to calculate surface exposure ages were used in the original publications for Terrestrial Cosmogenic Nuclide 10 Be (TCN-10 Be) (e.g. Wesnousky et al, 2012;Carcaillet et al, 2013;Angel, 2016). Production rates for 10 Be in the tropical Andes have only recently become available (e.g.…”

Section: Introductionmentioning

confidence: 99%

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Pleistocene Glaciations in the Northern Tropical Andes, South America (Venezuela, Colombia and Ecuador)

Angel¹,

Guzmán²,

Carcaillet³

2017

CIG

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“…10 Ma) to present (Kohn et al, 1984;Pindell et al, 1998). Quaternary uplift ranges between ~0.7 and 5 mm/a (Audemard and Audemard, 2002;Wesnousky et al, 2012;Guzmán et al, 2013).…”

Section: Venezuelamentioning

confidence: 96%

Section: Venezuelamentioning

confidence: 99%

Section: Venezuelamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Pleistocene Glaciations in the Northern Tropical Andes, South America (Venezuela, Colombia and Ecuador)

Angel¹,

Guzmán²,

Carcaillet³

2017

CIG

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Pleistocene slip rates on the Boconó fault along the North Andean Block plate boundary, Venezuela

et al. 2017

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The Boconó fault is a strike‐slip fault lying between the North Andean Block and the South American plate which has triggered at least five Mw > 7 historical earthquakes in Venezuela. The North Andean Block is currently moving toward NNE with respect to a stable South American plate. This relative displacement at ~12 mm yr−1 in Venezuela (within the Maracaibo Block) was measured by geodesy, but until now the distribution and rates of Quaternary deformation have remained partially unclear. We used two alluvial fans offset by the Boconó fault (Yaracuy Valley) to quantify slip rates, by combining 10Be cosmogenic dating with measurements of tectonic displacements on high‐resolution satellite images (Pleiades). Based upon a fan dated at >79 ka and offset by 1350–1580 m and a second fan dated at 120–273 ka and offset by 1236–1500 m, we obtained two Pleistocene rates of 5.0–11.2 and <20.0 mm yr−1, consistent with the regional geodesy. This indicates that the Boconó fault in the Yaracuy Valley accommodates 40 to 100% of the deformation between the South American plate and the Maracaibo Block. As no aseismic deformation was shown by interferometric synthetic aperture radar analysis, we assume that the fault is locked since the 1812 event. This implies that there is a slip deficit in the Yaracuy Valley since the last earthquake ranging from ~1 to 4 m, corresponding to a Mw 7–7.6 earthquake. This magnitude is comparable to the 1812 earthquake and to other historical events along the Boconó fault.

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Spatiotemporal Clustering of Paleoseismicity in the Walker Lane, Nevada: an Extensional Supercycle?

Pierce

2021

Preprint

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Toward quantifying geomorphic rates of crustal displacement, landscape development, and the age of glaciation in the Venezuelan Andes

Cited by 24 publications

References 63 publications

Pleistocene Glaciations in the Northern Tropical Andes, South America (Venezuela, Colombia and Ecuador)

Pleistocene Glaciations in the Northern Tropical Andes, South America (Venezuela, Colombia and Ecuador)

Pleistocene slip rates on the Boconó fault along the North Andean Block plate boundary, Venezuela

Spatiotemporal Clustering of Paleoseismicity in the Walker Lane, Nevada: an Extensional Supercycle?

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