Mostrar el registro sencillo del ítem Ryan, Jamie Beck, Susan Zandt, George Wagner, Lara Minaya, Estela Tavera, Hernando 2018-08-09T12:05:30Z 2018-08-09T12:05:30Z 2016-07
dc.identifier.govdoc index-oti2018 (NB)
dc.identifier.issn 401951
dc.description En: Tectonophysics, v. 682, (July 2016), p. 120-133. es_ES
dc.description.abstract "The Central Andean Plateau (15°–27°S) is a high plateau in excess of 3 km elevation, associated with thickened crust along the western edge of the South America plate, in the convergent margin between the subducting Nazca plate and the Brazilian craton. We have calculated receiver functions using seismic data from a recent portable deployment of broadband seismometers in the Bolivian orocline (12°–21°S) region and combined them with waveforms from 38 other stations in the region to investigate crustal thickness and crust and mantle structures. Results from the receiver functions provide a more detailed map of crustal thickness than previously existed, and highlight mid-crustal features that match well with prior studies. The active volcanic arc and Altiplano have thick crust with Moho depths increasing from the central Altiplano (65 km) to the northern Altiplano (75 km). The Eastern Cordillera shows large along strike variations in crustal thickness. Along a densely sampled SW–NE profile through the Bolivian orocline there is a small region of thin crust beneath the high peaks of the Cordillera Real where the average elevations are near 4 km, and the Moho depth varies from 55 to 60 km, implying the crust is undercompensated by ~ 5 km. In comparison, a broader region of high elevations in the Eastern Cordillera to the southeast near ~ 20°S has a deeper Moho at ~ 65–70 km and appears close to isostatic equilibrium at the Moho. Assuming the modern-day pattern of high precipitation on the flanks of the Andean plateau has existed since the late Miocene, we suggest that climate induced exhumation can explain some of the variations in present day crustal structure across the Bolivian orocline. We also suggest that south of the orocline at ~ 20°S, the thicker and isostatically compensated crust is due to the absence of erosional exhumation and the occurrence of lithospheric delamination." es_ES
dc.format application/pdf es_ES
dc.language.iso eng es_ES
dc.publisher Elsevier es_ES
dc.relation.uri es_ES
dc.rights info:eu-repo/semantics/restrictedAccess es_ES
dc.rights.uri info:eu-repo/semantics/restrictedAccess es_ES
dc.source Repositorio institucional - IGP es_ES
dc.subject Isostasia es_ES
dc.subject Andes--Geología es_ES
dc.subject Tierra (Planeta)--Corteza es_ES
dc.subject Sismometría es_ES
dc.subject Placas tectónicas--Andes es_ES
dc.subject Climatología--Perú-Observaciones es_ES
dc.subject Geomorfología--Perú es_ES
dc.title Central Andean crustal structure from receiver function analysis es_ES
dc.type info:eu-repo/semantics/article es_ES
dc.subject.ocde Sismología es_ES
dc.subject.ocde Perú es_ES
dc.subject.ocde Región andina es_ES
dc.subject.ocde Geología es_ES
dc.subject.ocde Geología estructural es_ES
dc.subject.ocde Clima es_ES
dc.subject.ocde Estudios geofísicos es_ES
dc.identifier.journal Tectonophysics es_ES
dc.description.peer-review Por pares es_ES
dc.identifier.doi 10.1016/j.tecto.2016.04.048 es_ES




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