Cosmogenic Nuclide Chronology of Weathering Zones and Ice Sheet Limits in Northern Labrador: A Pilot Study
拉布拉多北部风化带和冰盖限制的宇宙成因核素年代学:一项试点研究
基本信息
- 批准号:9530759
- 负责人:
- 金额:$ 2.88万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:1996
- 资助国家:美国
- 起止时间:1996-06-15 至 1997-05-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
This proposal requests funds for a pilot study applying cosmogenic nuclide exposure ages to glacial deposits in the Torngat Mountains, northern Labrador, that were deposited by the eastern margin of the Laurentide Ice Sheet. This sequence of moraines and drift represents at least two successively limited glaciations of the Torngat Mountains and is a "type area" for study of weathering zones in North America. Despite over a century of study, the chronology of this classic sequence of differentially weathered glacial deposits is highly uncertain. Furthermore, the glacial history of this region is a key component in reconstructing the past history of the Laurentide Ice Sheet, which exerted a major influence on global climate during the last glacial period. Samples for measurement of cosmogenic 10Be and other cosmogenic nuclides will be collected to evaluate the suitability of this region for exposure dating studies. The preliminary 10Be data will be used to create an absolute exposure age chronology for the region, and to evaluate the correlation of previously mapped and correlated deposits. Potential results of the proposed work and its possible extensions include: An absolute chronology for a largely undated glacial sequence in an area that is crucial for reconstructing the margins of the Laurentide Ice Sheet at the last glacial maximum (LGM). Age constraints for glacial deposits and ice sheet limits related to pre-LGM Laurentide Ice Sheet advances in Labrador. Constraints on erosion rates and weathering history of rock surfaces in sub-Arctic/Arctic regions.
该提案要求提供资金,进行一项试点研究,将宇宙成因核素暴露年龄应用于拉布拉多北方Torngat山脉的冰川沉积物,这些冰川沉积物是由Laurentide冰盖东部边缘沉积的。 这一系列的冰碛物和冰碛物代表了至少两个连续的Torngat山脉有限冰川,是北美风化带研究的“典型地区”。 尽管经过了超过世纪的研究,这一经典的差异风化冰川沉积序列的年代是非常不确定的。 此外,该地区的冰川历史是重建劳伦泰德冰盖过去历史的关键组成部分,在末次冰期对全球气候产生了重大影响。 将收集测量宇宙成因10 Be和其他宇宙成因核素的样品,以评价该地区是否适合进行照射测年研究。 初步的10 Be数据将用于创建该地区的绝对暴露年龄年表,并评估以前绘制的相关矿床的相关性。 拟议工作的潜在成果及其可能的扩展包括: 这是一个对重建末次盛冰期(LGM)劳伦泰德冰盖边缘至关重要的地区的一个基本上没有日期的冰川序列的绝对年代学。 拉布拉多冰川沉积物的年龄限制和与LGM前劳伦泰德冰盖进展有关的冰盖限制。 对亚北极/北极地区岩石表面侵蚀速率和风化历史的限制。
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)
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Peter Clark其他文献
Implementation of a new urban energy budget scheme into MetUM. Part II: Validation against observations and model intercomparison
在 MetUM 中实施新的城市能源预算计划。
- DOI:
- 发表时间:
2010 - 期刊:
- 影响因子:0
- 作者:
A. Porson;Peter Clark;Ian N. Harman;Martin Best;Stephen E. Belcher - 通讯作者:
Stephen E. Belcher
Sites without Principles; post-excavation analysis of ‘pre-matrix’ sites
- DOI:
10.1016/b978-0-12-326445-9.50027-7 - 发表时间:
1993 - 期刊:
- 影响因子:0
- 作者:
Peter Clark - 通讯作者:
Peter Clark
Inquire Biology: A Textbook that Answers Questions
探究生物学:一本解答问题的教科书
- DOI:
- 发表时间:
2013 - 期刊:
- 影响因子:0
- 作者:
V. Chaudhri;B. Cheng;Adam Overholtzer;J. Roschelle;Aaron Spaulding;Peter Clark;M. Greaves;David Gunning - 通讯作者:
David Gunning
Tell Me Why: Using Question Answering as Distant Supervision for Answer Justification
告诉我为什么:使用问答作为答案论证的远程监督
- DOI:
- 发表时间:
2017 - 期刊:
- 影响因子:0
- 作者:
Rebecca Sharp;M. Surdeanu;Peter Alexander Jansen;M. A. Valenzuela;Peter Clark;Michael Hammond - 通讯作者:
Michael Hammond
Think you have Solved Direct-Answer Question Answering? Try ARC-DA, the Direct-Answer AI2 Reasoning Challenge
您认为您已经解决了直接回答问题吗?
- DOI:
- 发表时间:
2021 - 期刊:
- 影响因子:0
- 作者:
Sumithra Bhakthavatsalam;Daniel Khashabi;Tushar Khot;Bhavana Dalvi;Kyle Richardson;Ashish Sabharwal;Carissa Schoenick;Oyvind Tafjord;Peter Clark - 通讯作者:
Peter Clark
Peter Clark的其他文献
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{{ truncateString('Peter Clark', 18)}}的其他基金
Circle-A: Parametrizing Convection in the Hard Grey Zone: Modelling the Interaction of Turbulent Cloud processes with Explicit Cloud Dynamics.
Circle-A:硬灰色区域中的对流参数化:对湍流云过程与显式云动力学的相互作用进行建模。
- 批准号:
NE/N013735/1 - 财政年份:2016
- 资助金额:
$ 2.88万 - 项目类别:
Research Grant
Collaborative Research: Cosmogenic nuclide chronology and paleohydraulic modeling of late Pleistocene Missoula floods
合作研究:宇宙成因核素年代学和晚更新世米苏拉洪水的古水力模型
- 批准号:
1530097 - 财政年份:2015
- 资助金额:
$ 2.88万 - 项目类别:
Standard Grant
Collaborative Research: P2C2--Last Interglacial Earth System: Testing Transient Climate and Ice-sheet Simulations with a Proxy-data Network
合作研究:P2C2——最后一个间冰期地球系统:使用代理数据网络测试瞬态气候和冰盖模拟
- 批准号:
1503032 - 财政年份:2015
- 资助金额:
$ 2.88万 - 项目类别:
Standard Grant
Collaborative Research: P2C2--isotope-enabled TRAnsient Climate Evolution of the last 21,000 years (iTRACE21)----Understanding Deglacial Climate/Isotope Changes Using iCESM
合作研究:P2C2——过去21,000年同位素驱动的瞬态气候演化(iTRACE21)——利用iCESM了解冰消期气候/同位素变化
- 批准号:
1401802 - 财政年份:2014
- 资助金额:
$ 2.88万 - 项目类别:
Standard Grant
Doctoral Dissertation Research: The Geographic Extent of Late Pleistocene Subsurface Ocean Warming in the Northern Atlantic Ocean Basin and the Origin of Heinrich Events
博士论文研究:北大西洋盆地晚更新世地下海洋变暖的地理范围和海因里希事件的起源
- 批准号:
1303195 - 财政年份:2013
- 资助金额:
$ 2.88万 - 项目类别:
Standard Grant
Cosmogenic 10Be Chronology of Late Pleistocene Cirque Glaciation in Ireland and its Paleoclimatic Implications
爱尔兰晚更新世冰斗冰川作用的宇宙成因10Be年代学及其古气候意义
- 批准号:
1304909 - 财政年份:2013
- 资助金额:
$ 2.88万 - 项目类别:
Continuing Grant
Subsurface warming as a trigger for Heinrich events
地下变暖是海因里希事件的触发因素
- 批准号:
1335197 - 财政年份:2013
- 资助金额:
$ 2.88万 - 项目类别:
Standard Grant
Doctoral Dissertation Research: Understanding the Relationship Between Cosmic Ray Intensity and the Magnetic Field: A Case Study During the Most Recent Magnetic Reversal
博士论文研究:理解宇宙射线强度与磁场之间的关系:最近磁反转期间的案例研究
- 批准号:
1233003 - 财政年份:2012
- 资助金额:
$ 2.88万 - 项目类别:
Standard Grant
Collaborative Research: A new reconstruction of the last West Antarctic Ice Sheet deglaciation in the Ross Sea
合作研究:罗斯海最后一次西南极冰盖消融的新重建
- 批准号:
1043517 - 财政年份:2011
- 资助金额:
$ 2.88万 - 项目类别:
Standard Grant
A Workshop to Develop a Science and Implementation Plan For Projecting Future Sea-Level Rise from Land-Ice Loss
制定科学和实施计划以预测未来海平面因陆地冰损失而上升的研讨会
- 批准号:
1036804 - 财政年份:2010
- 资助金额:
$ 2.88万 - 项目类别:
Standard Grant
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