Chronology of deglaciation based on 10Be dates of glacial erosional features in the Grimsel Pass region, central Swiss Alps
Chronology of deglaciation based on 10Be dates of glacial erosional features in the Grimsel Pass region, central Swiss Alps
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基于瑞士阿尔卑斯山中部格里姆瑟尔山口地区冰川侵蚀特征的 10Be 日期的冰消年表
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发表时间：
2006
期刊：
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通讯作者：
C. Schlüchter
中科院分区：
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作者：
M. Kelly;S. Ivy‐Ochs;P. Kubik;F. Blanckenburg;C. Schlüchter
利用原位产生的宇宙成因10Be进行了地表暴露测年，以确定格里姆塞尔山口地区基岩表面自冰川消融以来的时间。从基岩表面修正的被雪覆盖的9个10Be日期是山口冰川消融的最小年龄。4个10Be来自海拔2500米以下的海面(Ma.s.l)在格里姆塞尔山口以东的纳格利斯格拉特利，年龄从14000年到11300年不等。三个10Be来自2600 m a.s.l以上的地点。在Näglisgrätli上的年龄大约在11 700到10 400年之间。两个10Be来自2560m a.s.l的地点。朱奇斯托克以下是大约12,100年和11,000年。Näglisgrätli上10Be年龄的地理分布可能反映了格里姆塞尔山口冰川消融的时间，也可能反映了山口地区基岩冰下侵蚀的差异。所有的日期都是在维尔眠晚期阿尔卑斯山冰盖消融和其他地区末次冰盛期(LGM)冰盖消融的背景下讨论的。
Surface exposure dating, using in situ produced cosmogenic 10Be, is applied to determine the time since deglaciation of bedrock surfaces in the Grimsel Pass region. Nine 10Be dates from bedrock surfaces corrected for cover by snow are minimum ages for deglaciation of the pass. Four 10Be dates from surfaces below 2500 meters above sea level (m a.s.l.) on Nägelisgrätli, east of Grimsel Pass, yield ages that range from about 14 000 to 11 300 years. Three 10Be dates from locations above 2600 m a.s.l. on Nägelisgrätli are between about 11 700 and 10 400 years. Two 10Be dates from locations at 2560 m a.s.l. below Juchlistock are about 12 100 and 11 000 years. The geographical distribution of 10Be dates on Nägelisgrätli either may show the timing of progressive deglaciation of Grimsel Pass or may reflect differences in subglacial erosion of bedrock in the pass region. All dates are discussed in the context of deglaciation of the late Würmian Alpine ice cap and deglaciation from Last Glacial Maximum (LGM) ice extents in other regions.