DOI: 10.1016/j.quascirev.2015.01.016
Scopus记录号: 2-s2.0-84922443883
论文题名: Cosmogenic dating of rock avalanches constraining Quaternary stratigraphy and regional neotectonics in the Argentine Central Andes (32° S)
作者: Moreiras S.M. ; Hermanns R.L. ; Fauqué L.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2015
卷: 112 起始页码: 45
结束页码: 58
语种: 英语
英文关键词: Central Andes
; Dating techniques
; Neotectonics
; Rock avalanches
Scopus关键词: Deposits
; Glacial geology
; Landforms
; Luminescence
; Rocks
; Central Andes
; Dating techniques
; Geomorphological evolution
; Neotectonics
; Optically stimulated luminescence
; Pleistocene glacial
; Quaternary stratigraphies
; Rock avalanche
; Stratigraphy
; chronostratigraphy
; cosmogenic radionuclide
; neotectonics
; paleontology
; Pleistocene
; rock avalanche
; tephrochronology
; Andes
; Argentina
; Mendoza
英文摘要: This paper provides a comprehensive review of the chronostratigraphy of six rock avalanches clustered in the northern extreme of the Cordon del Plata range. These rock avalanches are stratigraphically related to Pleistocene glacial drifts and valley-fill deposits documenting the regional neotectonic activity. We used cosmogenic dating (TCN) to directly date block surfaces of rock-avalanche deposits, as well as optically stimulated luminescence dating (OSL) of paleo-lakes dammed by these rock avalanches. Our new direct dates (17 TCN and 4 OSL) determine the Middle-to-Late Pleistocene age of these collapses. These are in contrast to the previously established chronostratigraphy based on relative dating techniques, paleontological context, and tephrochronology. These new data help to redefine the geomorphological evolution of the Mendoza River valley. Especially, the new data indicate that the glacial stratigraphy earlier proposed must be reconsidered. We redefine this stratigraphy as far as possible with our data and discuss the data in relation with other recently published results. However, it becomes clear that the glacial history of the Mendoza valley has to be studied anew by using modern dating techniques. In addition, our data suggest that the Carrera Fault system bounding the valleys of the Cordillera del Plata has been active more recently than proposed earlier. © 2015 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60004
Appears in Collections: 过去全球变化的重建
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作者单位: CONICET, Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales CCT-Mendoza, Av. Ruiz Leal s/n, Mendoza, Argentina; Norges geologiske undersøkelse, Leiv Eirikssons vei 39, Trondheim, Norway; Servicio Geológico Minero Argentino, Parque Tecnológico Miguelete, Av. General Paz 5445, San Martín WAB Buenos Aires, Argentina
Recommended Citation:
Moreiras S.M.,Hermanns R.L.,Fauqué L.. Cosmogenic dating of rock avalanches constraining Quaternary stratigraphy and regional neotectonics in the Argentine Central Andes (32° S)[J]. Quaternary Science Reviews,2015-01-01,112