A high-quality annually laminated sequence from Lake Belau, Northern Germany: Revised chronology and its implications for palynological and tephrochronological studies
A high-quality annually laminated sequence from Lake Belau, Northern Germany: Revised chronology and its implications for palynological and tephrochronological studies
复制标题
来自德国北部贝劳湖的高质量年度层压序列：修订的年代学及其对孢粉学和年代学研究的影响
DOI：
--
复制
发表时间：
2012
期刊：
影响因子：
--
通讯作者：
Julian Wiethold
中科院分区：
文献类型：
--
作者：
W. Dörfler;Ingo Feeser;Christel van den Bogaard;S. Dreibrodt;H. Erlenkeuser;A. Kleinmann;J. Merkt;Julian Wiethold
贝劳湖每年的层叠记录提供了一个以高时间分辨率研究全新世环境变化、气候历史和人类对景观影响的绝佳机会。建立了一个新的年表，该年表基于VOVE计数、~(14)C测年和重金属历史，覆盖了过去的9400年。基于对两个核心层序的多个VVE计数，容易统计的层状剖面跨度约为7850 VVE年(模拟年龄范围约为9430至1630卡)。BP)。不是所有的记录都具有相同的质量，但大约69%的VARVES序列被归类为高质量，而仅有C.5%的低质量。新的年表表明，记录的层叠部分的日期一般比之前假设的早约260年。讨论了该地区植被和土地利用历史的意义，以及孢粉地层事件的修订日期。Tephra分析可以识别出几个加密Tephra层。新的火山喷发日期为莱尔格B事件(约6848卡)。BP，2S范围6930-6713 CAL。BP)，Hekla 4事件(c.4396 cal.BP，2S范围4417-4266卡。BP)和Hekla 3喷发(约3095卡)。BP，2S范围3120-3068 CAL。BP)。
The annually laminated record of Lake Belau offers an exceptional opportunity to investigate with high temporal resolution Holocene environmental change, aspects of climate history and human impact on the landscape. A new chronology based on varve counts, 14C-datings and heavy metal history has been established, covering the last 9400 years. Based on multiple varve counting on two core sequences, the easily countable laminated section spans about 7850 varve years (modelled age range c. 9430 to 1630 cal. BP). Not all of the record is of the same quality but approximately 69% of the varves sequence is classified to be of high quality and only c. 5% of low quality. The new chronology suggests dates generally c. 260 years older than previously assumed for the laminated section of the record. The implications for the vegetation and land-use history of the region as well as revised datings for pollen stratigraphical events are discussed. Tephra analysis allowed the identification of several cryptotephra layers. New dates for volcanic eruptions are presented for the Lairg B event (c. 6848 cal. BP, 2s range 6930–6713 cal. BP), the Hekla 4 event (c. 4396 cal. BP, 2s range 4417–4266 cal. BP), and Hekla 3 eruption (c. 3095 cal. BP, 2s range 3120–3068 cal. BP).