Identification of the Fugloyarbanki tephra in the NGRIP ice core: a key tie-point for marine and ice-core sequences during the last glacial period
Identification of the Fugloyarbanki tephra in the NGRIP ice core: a key tie-point for marine and ice-core sequences during the last glacial period
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DOI：
10.1002/jqs.1182
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发表时间：
2008-07-01
影响因子：
2.3
通讯作者：
Andersen, K. K.
中科院分区：
文献类型：
--
作者：
Davies, S. M.;Wastegard, S.;Andersen, K. K.
通过地球化学分析，在NGRIP冰芯中发现了一个可见的Tephra层，即Fugloyarbani tephra，这是法罗群岛地区和北大西洋北部海洋岩芯中广泛存在的标志层。根据新的格陵兰冰芯年代学(GICC05)，基于年层的多参数计算，得出了该冰盖的年龄为26740+/-390年B2K(1西格玛不确定度)。首次在NGRIP冰芯中检测到这一冰盖，在从管理信息系统3到冰芯2的过渡过程中，提供了海洋和冰芯记录之间的关键连接点。在格陵兰记录中识别这一火山事件表明，未来有可能利用冰盖年代学对跨越最后冰期的遥远地区的古档案进行精确对比，并提供一种潜在的方法来检查此时放射性碳海相储层效应的程度。版权所有(C)2008 John Wiley&Sons，Ltd.
A visible tephra horizon in the NGRIP ice core has been identified by geochemical analysis as the Fugloyarbanki Tephra, a widespread marker horizon in marine cores from the Faroe Islands area and the northern North Atlantic. An age of 26 740 +/- 390 yr b2k (1 sigma uncertainty) is derived for this tephra according to the new Greenland Ice Core Chronology (GICC05) based on multiparameter counting of annual layers. Detection of this tephra for the first time within the NGRIP ice core provides a key tie-point between marine and ice-core records during the transition between MIS 3 and 2. Identification of this volcanic event within the Greenland records demonstrates the future potential of using tephrochronology to precisely correlate palaeoarchives in widely separated localities that span the last glacial period, as well as providing a potential method for examining the extent of the radiocarbon marine reservoir effect at this time. Copyright (C) 2008 John Wiley & Sons, Ltd.