Antarctic Peninsula Exhumation and Landscape Development Investigated by Low-temperature Detrital Thermochronometry
低温碎屑测温法研究南极半岛折返和景观发育
基本信息
- 批准号:1246484
- 负责人:
- 金额:$ 10.13万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:2012
- 资助国家:美国
- 起止时间:2012-12-01 至 2014-11-30
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Intellectual Merit: The PIs propose to use the (U-Th)/He system in apatite to investigate the exhumation history, development of the present topography, and pattern of glacial erosion in the central Antarctic Peninsula. The Antarctic Peninsula has been glaciated since the Eocene and Pleistocene climate cooling is hypothesized to have suppressed, rather than enhanced, glacial erosion. To achieve these goals, the PIs will use a thermochronometric record of when and how the present glacial valley relief formed. A challenge to the proposed research is that, unlike Pleistocene glacial landscapes in temperate areas, the Peninsula is ice-covered and it is not possible to directly sample the bedrock surface. The PIs hope to learn about the timing and process of glacial valley formation through apatite (U-Th)/He and 4He/3He measurements on glacial sediment collected near the grounding lines of major glaciers draining the Peninsula. Learning how the Antarctic Peninsula landscape formed is important to discern how the mechanics of glacial erosion operate on long time scales, and to understand how glaciers mediate the interaction between climate change and orogenic mass balance. This work addresses a fundamental question in Antarctic earth science of how to infer geologic and geomorphic processes active on an ice-covered and inaccessible landscape.Broader impacts: This proposal will bring new researchers into the Antarctic research community. A proposed collaboration with British Antarctic Survey researchers will build an international collaboration. The outcomes of this project have ancillary importance to other fields and addresses fundamental challenges in Antarctic Earth Science.
智力优势:研究人员建议利用磷灰石中的(U-Th)/He系统来研究南极中部半岛的折返历史、现今地形的发展和冰川侵蚀的模式。南极半岛自始新世和更新世以来一直被冰川化,气候变冷被假设为抑制而不是增强了冰川侵蚀。为了实现这些目标,PI将使用热计时记录,记录目前的冰川谷地貌形成的时间和方式。拟议中的研究面临的一个挑战是,与温带地区的更新世冰川景观不同,半岛被冰层覆盖,不可能直接对基岩表面进行采样。PI希望通过对半岛主要冰川接地线附近收集的冰川沉积物进行磷灰石(U-Th)/He和4 He/3 He测量,了解冰川山谷形成的时间和过程。了解南极半岛景观是如何形成的,对于辨别冰川侵蚀的机制如何在长时间尺度上运作,以及了解冰川如何调解气候变化和造山带物质平衡之间的相互作用非常重要。这项工作解决了南极地球科学中的一个基本问题,即如何推断在冰层覆盖和难以进入的景观上活跃的地质和地貌过程。与英国南极调查研究人员的拟议合作将建立一个国际合作。该项目的成果对其他领域具有辅助重要性,并解决了南极地球科学的根本挑战。
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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Gregory Balco其他文献
Gregory Balco的其他文献
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{{ truncateString('Gregory Balco', 18)}}的其他基金
Targeted Basic Research to Enable Antarctic Science Applications of Cosmogenic-Nuclide Geochemistry
有针对性的基础研究使宇宙成因核素地球化学在南极科学应用成为可能
- 批准号:
2139497 - 财政年份:2022
- 资助金额:
$ 10.13万 - 项目类别:
Standard Grant
COLLABORATIVE RESEARCH: Site Survey for Subglacial Bedrock Exposure Dating at the Margin of the Wilkes Basin in Northern Victoria Land
合作研究:维多利亚州北部威尔克斯盆地边缘冰下基岩暴露年代测定现场调查
- 批准号:
1744844 - 财政年份:2021
- 资助金额:
$ 10.13万 - 项目类别:
Standard Grant
COLLABORATIVE RESEARCH: A TRANSPARENT-MIDDLE-LAYER COMPUTATIONAL AND DATA MANAGEMENT INFRASTRUCTURE FOR SYNOPTIC APPLICATIONS OF COSMOGENIC-NUCLIDE GEOCHEMISTRY
合作研究:宇宙成因核素地球化学概要应用的透明中间层计算和数据管理基础设施
- 批准号:
1948416 - 财政年份:2020
- 资助金额:
$ 10.13万 - 项目类别:
Continuing Grant
Collaborative Research: Reconstructing Temperatures during the Mid-Pliocene Warm Period in the McMurdo Dry Valleys with Cosmogenic Noble Gases
合作研究:用宇宙成因惰性气体重建麦克默多干谷中上新世温暖期的温度
- 批准号:
1935907 - 财政年份:2020
- 资助金额:
$ 10.13万 - 项目类别:
Standard Grant
Synoptic Evaluation of Long-Term Antarctic Ice Sheet Model Simulations using a Continent-Wide Database of Cosmogentic-Nuclide Measurements
使用全大陆宇宙成因核素测量数据库对长期南极冰盖模型模拟进行天气评估
- 批准号:
1744771 - 财政年份:2018
- 资助金额:
$ 10.13万 - 项目类别:
Standard Grant
COLLABORATIVE RESEARCH: Resolving Ambiguous Exposure-Age Chronologies of Antarctic Deglaciation with Measurements of In-Situ-Produced Cosmogenic Carbon-14
合作研究:通过测量原位产生的宇宙成因碳 14 来解决南极冰川消融的模糊暴露年龄年表
- 批准号:
1542976 - 财政年份:2016
- 资助金额:
$ 10.13万 - 项目类别:
Standard Grant
Collaborative Research: Long Term Sublimation/Preservation of Two Separate, Buried Glacier Ice Masses, Ong Valley, Southern Transantarctic Mountains
合作研究:跨南极山脉南部翁谷两个独立的埋藏冰川冰块的长期升华/保存
- 批准号:
1445168 - 财政年份:2016
- 资助金额:
$ 10.13万 - 项目类别:
Standard Grant
Collaborative Research: Potential Direct Geologic Constraint of Ice Sheet Thickness in the Central Transantarctic Mountains during the Pliocene Warm Period
合作研究:上新世温暖期横贯南极中部山脉冰盖厚度的潜在直接地质约束
- 批准号:
1443329 - 财政年份:2015
- 资助金额:
$ 10.13万 - 项目类别:
Standard Grant
COLLABORATIVE RESEARCH: Terrestrial Exposure-Age Constraints on the last Glacial Maximum Extent of the Antarctic Ice Sheet in the Western Ross Sea
合作研究:西罗斯海南极冰盖末次冰期最大范围的陆地暴露年龄限制
- 批准号:
1341420 - 财政年份:2014
- 资助金额:
$ 10.13万 - 项目类别:
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Collaborative Research: P2C2--Synchronizing the North American Varve Chronology and the Greenland Ice Core Record Using Meteoric 10Be Flux
合作研究:P2C2——使用流星 10Be 通量同步北美 Varve 年代学和格陵兰冰芯记录
- 批准号:
1103037 - 财政年份:2011
- 资助金额:
$ 10.13万 - 项目类别:
Standard Grant
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