气候变化领域集成服务门户(CCPortal): First 36 Cl cosmogenic moraine geochronology of the Dinaric mountain karst: Velež and Crvanj Mountains of Bosnia and Herzegovina

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DOI	10.1016/j.quascirev.2019.02.002
	First 36 Cl cosmogenic moraine geochronology of the Dinaric mountain karst: Velež and Crvanj Mountains of Bosnia and Herzegovina
	Žebre M.; Sarıkaya M.A.; Stepišnik U.; Yıldırım C.; Çiner A.
发表日期	2019
ISSN	0277-3791
起始页码	54
结束页码	75
卷号	208
英文摘要	This article presents the first attempt to date moraines in the Dinaric mountain karst using cosmogenic 36 Cl surface exposure dating technique. Twenty samples were collected from moraine boulders from two sets of the lowest and largest lateral moraines on the Velež (1965 m asl) and Crvanj mountains (1920 m asl) in Bosnia and Herzegovina. The dated lateral-terminal moraine complexes, spanning elevations from ∼980 to 1350 m asl, are up to 2.7 km long and rise more than 100 m above the valley floor. The moraine boulders yielded 36 Cl ages spanning from Oldest Dryas for Velež (14.9 ± 1.1 ka) to Younger Dryas for Crvanj (11.9 ± 0.9 ka), considering the average age of the two oldest samples from each lateral moraine as the most representative time of moraine emplacement. The dated moraines mark the largest extent of glaciers in both study areas, which have been reconstructed to ∼28 km 2 for Velež and ∼24 km 2 for Crvanj, having a mean equilibrium line altitude at 1388 m and 1541 m, respectively. Under modern precipitation values, which account for ∼2000 mm, the temperature depression between 8 and 10 °C is required to sustain the palaeoglaciers with reconstructed equilibrium line altitudes. Glaciers of similar size with such low equilibrium line altitudes during the Lateglacial have not been reported until now for the Balkan Peninsula. It is very likely that the boulder ages reflect complex exhumation and denudation histories, which at this point do not allow obtaining more precise moraine chronologies for the study areas. Nevertheless, this article delivers new data on the extent and timing of Quaternary glaciations in the Mediterranean mountains, where records of glacier fluctuations seem to be asynchronous amongst different areas. It is clear that dating moraines with cosmogenic 36 Cl surface exposure dating in carbonate lithologies in areas of high precipitation like the Dinaric karst, remains challenging. © 2019 Elsevier Ltd
英文关键词	Cosmogenic surface exposure dating; Dinaric karst; Equilibrium line altitude; Glaciation; Palaeoclimate; Quaternary
语种	英语
scopus关键词	Geochronology; Glacial geology; Dinaric karst; Equilibrium line altitudes; Glaciation; Palaeoclimate; Quaternary; Surface exposure dating; Landforms; age determination; altitude; chlorine isotope; cosmogenic radionuclide; dating method; equilibrium line; geochronology; glaciation; karst; late glacial; moraine; mountain region; paleoclimate; paleoenvironment; Quaternary; radiocarbon dating; Alps; Balkans; Bosnia and Herzegovina; Crvanj Mountain; Dinaric Alps; Eastern Alps; Mediterranean Region
来源期刊	Quaternary Science Reviews
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/152005
作者单位	Geological Survey of Slovenia, Dimičeva Ulica 14, Ljubljana, 1000, Slovenia; Eurasia Institute of Earth Sciences, Istanbul Technical University, Maslak, Istanbul, 34469, Turkey; Department of Geography, Faculty of Arts, University of Ljubljana, Aškerčeva 2, Ljubljana, 1000, Slovenia
推荐引用方式 GB/T 7714	Žebre M.,Sarıkaya M.A.,Stepišnik U.,et al. First 36 Cl cosmogenic moraine geochronology of the Dinaric mountain karst: Velež and Crvanj Mountains of Bosnia and Herzegovina[J],2019,208.
APA	Žebre M.,Sarıkaya M.A.,Stepišnik U.,Yıldırım C.,&Çiner A..(2019).First 36 Cl cosmogenic moraine geochronology of the Dinaric mountain karst: Velež and Crvanj Mountains of Bosnia and Herzegovina.Quaternary Science Reviews,208.
MLA	Žebre M.,et al."First 36 Cl cosmogenic moraine geochronology of the Dinaric mountain karst: Velež and Crvanj Mountains of Bosnia and Herzegovina".Quaternary Science Reviews 208(2019).