Lake Melville sediments: A window to the pre-Holocene glacial history of the Laurentide Ice Sheet (Acronym: MELSED)
梅尔维尔湖沉积物:了解劳伦泰冰原全新世前冰川历史的窗口(缩写:MELSED)
基本信息
- 批准号:447558642
- 负责人:
- 金额:--
- 依托单位:
- 依托单位国家:德国
- 项目类别:Infrastructure Priority Programmes
- 财政年份:
- 资助国家:德国
- 起止时间:
- 项目状态:未结题
- 来源:
- 关键词:
项目摘要
Lake Melville is located close to the southeastern rim of the highly dynamic former Laurentide Ice Sheet (LIS). In the uppermost approximately 10 m of the lake’s sediment sequence, the post-glacial history of the LIS back to ca. 10000 cal. y BP is archived. With a total sediment infill of more than 300-400 m, of which a large portion is well-layered, however, the lake potentially holds an excellent long-term record that might reach back well beyond the last glaciation. During RV Maria S. Merian expedition MSM84 that took place last summer, we collected a series of sediment cores along with a dense grid of hydroacoustic data. First data from the cores in concert with the sediment echosounder data reveal five seismic and lithological units: (I) postglacial sediments, (II) deglacial sediments, (III) sediments that were presumably deposited during a phase when Lake Melville persisted as subglacial lake below the LIS, (IV) well-layered sediments below the subglacial-lake sediments possibly deposited during a previous ice-free phase, possibly of MIS5, MIS4, or early MIS3 age. Below these units, bedrock (V) was identified. Our cores penetrated through units I to II and into the uppermost part of III. We propose to investigate the Holocene and deglacial sequence to reconstruct the respective paleoclimate conditions and the history of the LIS retreat. In addition, the subglacial lake and its deposits will be characterized and tested for their sensitivity and ability to record paleoclimate change. On the sediment cores, non-destructive, high-resolution analyses like CT scanning, physical property measurements and XRF scanning will be performed prior to sampling of selected sediment sequences. Chronological control is gained through AMS 14C-dating of different sediment components with the MICADAS system and paleomagnetic measurements performed on U-channels. Using a combination of non-destructive with destructive analyses like TIC, TOC, grain-size, XRD and WD-XRF determinations, a reconstruction of paleoclimate and paleoenvironmental changes will be achieved. A focus is placed on the development of proxies that allow the reconstruction of LIS dynamics. If Lake Melville sediments could be shown to hold a paleoclimate archive reaching back well beyond the Holocene, this site would be a prime target for a future joint amphibious IODP-ICDP-drilling project with the aim to reconstruct the past waxing and waning of the LIS.
梅尔维尔湖位于高度活跃的前劳伦蒂德冰盖(LIS)的东南边缘。在湖的沉积序列的最上面大约10米处,LIS的冰后历史可以追溯到大约10000卡。英国石油公司被存档了。然而,由于沉积物总填充量超过300-400米,其中很大一部分是分层良好的,该湖可能保持着良好的长期记录,可能会追溯到上一次冰川之后很久。在去年夏天进行的MSM84号RV Maria S.Merian探险期间,我们收集了一系列沉积物岩心以及密集的水声数据网格。首先,来自岩心的数据与沉积物回声探测仪的数据相结合,揭示了五个地震和岩性单元:(I)冰后沉积,(Ii)去冰川沉积,(Iii)推测是在LIS以下的Melville湖作为冰下湖泊持续的阶段沉积的,(Iv)冰下湖泊下的分层沉积,可能是在以前的无冰阶段沉积的,可能是MIS5,MIS4或MIS3早期。在这些单元的下方,识别出基岩(V)。我们的岩心穿过I-II单元,进入III单元的最上部。我们建议调查全新世和去冰期序列,以恢复各自的古气候条件和LIS退缩的历史。此外,将对冰下湖泊及其沉积物的敏感性和记录古气候变化的能力进行表征和测试。对于沉积物岩心,在对选定的沉积物序列进行采样之前,将进行非破坏性的高分辨率分析,如CT扫描、物性测量和XRF扫描。年代学控制是通过MICADAS系统对不同沉积物组分进行AMS 14C定年和在U形槽上进行古地磁测量而获得的。利用非破坏性分析和破坏性分析相结合的方法,如TIC、TOC、粒度、X射线衍射仪和X射线衍射仪,将实现古气候和古环境变化的重建。重点是开发能够重建LIS动力学的代理。如果能够证明梅尔维尔湖沉积物保存着一份可追溯到全新世以后的古气候档案,该地点将成为未来IODP-ICDP两栖联合钻探项目的主要目标,目的是重建LIS过去的兴衰。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
数据更新时间:{{ journalArticles.updateTime }}
{{
item.title }}
{{ item.translation_title }}
- DOI:
{{ item.doi }} - 发表时间:
{{ item.publish_year }} - 期刊:
- 影响因子:{{ item.factor }}
- 作者:
{{ item.authors }} - 通讯作者:
{{ item.author }}
数据更新时间:{{ journalArticles.updateTime }}
{{ item.title }}
- 作者:
{{ item.author }}
数据更新时间:{{ monograph.updateTime }}
{{ item.title }}
- 作者:
{{ item.author }}
数据更新时间:{{ sciAawards.updateTime }}
{{ item.title }}
- 作者:
{{ item.author }}
数据更新时间:{{ conferencePapers.updateTime }}
{{ item.title }}
- 作者:
{{ item.author }}
数据更新时间:{{ patent.updateTime }}
Dr. Andrea Catalina Gebhardt其他文献
Dr. Andrea Catalina Gebhardt的其他文献
{{
item.title }}
{{ item.translation_title }}
- DOI:
{{ item.doi }} - 发表时间:
{{ item.publish_year }} - 期刊:
- 影响因子:{{ item.factor }}
- 作者:
{{ item.authors }} - 通讯作者:
{{ item.author }}
{{ truncateString('Dr. Andrea Catalina Gebhardt', 18)}}的其他基金
Seismic investigation of Lake Issyk-Kul sediments - paleoclimatic and tectonic evolution of the lake and its basin
伊塞克湖沉积物的地震调查 - 湖泊及其盆地的古气候和构造演化
- 批准号:
194345370 - 财政年份:2011
- 资助金额:
-- - 项目类别:
Infrastructure Priority Programmes
Seismic investigation of sedimentary fill and bedrock geometry of maar lake "Potrok Aike", Southern Patagonia (potential ICDP drill site)
巴塔哥尼亚南部玛珥湖“Potrok Aike”沉积物充填物和基岩几何形状的地震调查(潜在的 ICDP 钻探地点)
- 批准号:
36903056 - 财政年份:2007
- 资助金额:
-- - 项目类别:
Infrastructure Priority Programmes
Three-dimensional geometry and quantification of the sedimentary fill of Lake El'gygytgyn (Chukotka, NE Siberia)
Elgygytgyn 湖(西伯利亚东北部楚科奇卡)沉积物填充物的三维几何和定量
- 批准号:
22136426 - 财政年份:2006
- 资助金额:
-- - 项目类别:
Infrastructure Priority Programmes
相似海外基金
Rereading Herman Melville
重读赫尔曼·梅尔维尔
- 批准号:
19K00428 - 财政年份:2019
- 资助金额:
-- - 项目类别:
Grant-in-Aid for Scientific Research (C)
Sedimentary Records of the Evolution of the Melville Bugt Ice Stream
梅尔维尔巴格特冰流演化的沉积记录
- 批准号:
2280702 - 财政年份:2019
- 资助金额:
-- - 项目类别:
Studentship
Melville in His Later Years: His Asthetics and Politics from Transatlantic Perspectives
梅尔维尔的晚年:跨大西洋视角下的美学与政治
- 批准号:
18K00368 - 财政年份:2018
- 资助金额:
-- - 项目类别:
Grant-in-Aid for Scientific Research (C)
Application of Mass Dependent and Mass Independent Mercury Stable Isotope Fractionation to Understand the Biogeochemical Cycling of Mercury in Lake Melville, Labrador
应用质量相关和质量无关的汞稳定同位素分馏来了解拉布拉多梅尔维尔湖中汞的生物地球化学循环
- 批准号:
488067-2016 - 财政年份:2018
- 资助金额:
-- - 项目类别:
Alexander Graham Bell Canada Graduate Scholarships - Doctoral
Application of Mass Dependent and Mass Independent Mercury Stable Isotope Fractionation to Understand the Biogeochemical Cycling of Mercury in Lake Melville, Labrador
应用质量相关和质量无关的汞稳定同位素分馏来了解拉布拉多梅尔维尔湖中汞的生物地球化学循环
- 批准号:
488067-2016 - 财政年份:2017
- 资助金额:
-- - 项目类别:
Alexander Graham Bell Canada Graduate Scholarships - Doctoral
Terrain controls over permafrost disturbance, Melville Island
梅尔维尔岛永久冻土扰动的地形控制
- 批准号:
481200-2015 - 财政年份:2015
- 资助金额:
-- - 项目类别:
University Undergraduate Student Research Awards
Die Ordnung der Kommunikation und die Kommunikation der Ordnungen. Bd. 2: Zentralität: Papsttum und Orden im Europa des 12. und 13. Jahrhunderts (hg. C. Andenna/G. Blenemann/K. Herbers/G. Melville)
沟通的顺序和命令的沟通。
- 批准号:
235355067 - 财政年份:2013
- 资助金额:
-- - 项目类别:
Publication Grants
Oceanographic Technical Services, R/V Revelle, R/V Melville, R/V New Horizon and R/V Sproul, 2012 ? 2016
海洋学技术服务,R/V Revelle、R/V Melville、R/V New Horizon 和 R/V Sproul,2012 年?
- 批准号:
1227624 - 财政年份:2012
- 资助金额:
-- - 项目类别:
Continuing Grant
Ship Operations - R/V Melville
船舶运营 - R/V Melville
- 批准号:
1212771 - 财政年份:2012
- 资助金额:
-- - 项目类别:
Cooperative Agreement