DOI: 10.1016/j.quascirev.2012.10.019
Scopus记录号: 2-s2.0-84878926863
论文题名: Towards a late Quaternary tephrochronological framework for the southernmost part of South America - the Laguna Potrok Aike tephra record
作者: Wastegård S. ; Veres D. ; Kliem P. ; Hahn A. ; Ohlendorf C. ; Zolitschka B.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2013
卷: 71 起始页码: 81
结束页码: 90
语种: 英语
英文关键词: Chronology
; ICDP-project PASADO
; Mt. Burney
; Pleistocene
; Tephra
; Volcanic
Scopus关键词: Chronology
; ICDP-project PASADO
; Mt. Burney
; Pleistocene
; Tephra
; Volcanic
; Geology
; Natural sciences
; Volcanoes
; community composition
; oxide
; Quaternary
; sediment analysis
; tephrochronology
; volcanic eruption
; Argentina
; Laguna Potrok Aike
; Santa Cruz [Argentina]
英文摘要: A total of 18 tephra samples have been analysed from the composite sediment sequence from Site 2 of the Laguna Potrok Aike ICDP expedition 5022 from southern Patagonia, Argentina, which extends back to ca 51kacalBP. Analyses of the volcanic glass show that all layers but one are rhyolitic in composition, with SiO2 contents ranging between ca 74.5 and 78wt% and suggest an origin in the Austral Andean Volcanic Zone (AVZ; 49-55°S). Nonetheless, two main data clusters occur, one group with K2O contents between ca 1.5 and 2.0wt%, indicating an origin in the Mt. Burney volcanic area, and one group with K2O contents between ca 2.7 and 3.9wt%, tentatively correlated with Viedma/Lautaro and the Aguilera volcanoes in the northern part of the AVZ. The early Holocene Tephra, MB1 and the late Pleistocene Reclus R1 tephra occur in the upper part of the sequence. Periods with significant tephra deposition occurred between ca 51-44kacalBP, and ca 31-25kacalBP, with a decrease in tephra layer frequency between these two periods. © 2012 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60624
Appears in Collections: 过去全球变化的重建
There are no files associated with this item.
作者单位: Department of Physical Geography and Quaternary Geology, Stockholm University, SE-10691 Stockholm, Sweden; Department of Geology, Babes-Bolyai University, 400084 Cluj-Napoca, Romania; Institute of Speleology, Romanian Academy, 400006 Cluj-Napoca, Romania; GEOPOLAR, Institute of Geography, University of Bremen, Celsiusstr. FVG-M, D-28359 Bremen, Germany
Recommended Citation:
Wastegård S.,Veres D.,Kliem P.,et al. Towards a late Quaternary tephrochronological framework for the southernmost part of South America - the Laguna Potrok Aike tephra record[J]. Quaternary Science Reviews,2013-01-01,71