Development of New Techniques: Sustaining and sharpening amino acid geochronology
新技术的开发:维持和加强氨基酸地质年代学
基本信息
- 批准号:1855381
- 负责人:
- 金额:$ 30.81万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Continuing Grant
- 财政年份:2019
- 资助国家:美国
- 起止时间:2019-07-01 至 2023-06-30
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Determining the ages of geological materials (geochronology) is fundamental to understanding Earth's history. Amino acid racemization (AAR) geochronology is a dating method applicable to a wide range of fossils types, depositional environments, and time scales. It enables research in a broad range of geoscience topics such as archeology, historical ecology, paleontology, tectonic geomorphology, paleoceanography, glacial geology, and others. This award will support scientific infrastructure by sustaining the laboratory for AAR geochronology at Northern Arizona University. This project will sharpen one of the most outstanding untapped applications of AAR geochronology: as a dating method for marine sediment cores using foraminifera. Various procedures will be tested to reduce analytical variability, a major source of error for AAR geochronology when applied to foraminifera. Several widely occurring foraminifera taxa will be subjected to chemical pre-treatments to isolate a fraction of amino acids that is less prone to post-depositional environmental influences. Once optimized, the treatment will be applied to samples from a network of stratigraphic reference horizons from well-dated deep-sea cores. The data will be used to evaluate the reproducibility of AAR geochronology among the sites and to calibrate the rate of racemization for several reference species. Samples from other sites will be used to quantify the possible influence of different geothermal gradients on the extent of racemization in foraminifera. Recently developed data-analytical approaches will be employed to model the time-dependent rate of racemization and to characterize age uncertainties.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.
确定地质材料的年龄(地质年代学)是了解地球历史的基础。氨基酸消旋(AAR)年代学是一种适用于广泛的化石类型、沉积环境和时间尺度的定年方法。它使研究范围广泛的地球科学主题,如考古学,历史生态学,古生物学,构造地貌学,古海洋学,冰川地质学等。该奖项将通过支持北方亚利桑那大学的AAR地质年代学实验室来支持科学基础设施。该项目将加强AAR地质年代学最突出的未开发应用之一:作为利用有孔虫确定海洋沉积物岩心年龄的方法。各种程序将进行测试,以减少分析的可变性,一个主要的错误来源AAR地质年代学时,适用于有孔虫。几种广泛存在的有孔虫类群将进行化学预处理,以分离出一部分不太容易受到沉积后环境影响的氨基酸。一旦得到优化,这种处理方法将应用于从年代久远的深海岩心的地层参考层网络中提取的样品。这些数据将被用来评估的再现性AAR地质年代学的网站之间,并校准外消旋化率为几个参考物种。其他地点的样品将用于量化不同地热梯度对有孔虫外消旋化程度的可能影响。最近开发的数据分析方法将被用来模拟与时间相关的外消旋化速率和表征年龄的不确定性。该奖项反映了NSF的法定使命,并已被认为是值得通过使用基金会的智力价值和更广泛的影响审查标准进行评估的支持。
项目成果
期刊论文数量(35)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Millennial‐Scale Age Offsets Within Fossil Assemblages: Result of Bioturbation Below the Taphonomic Active Zone and Out‐of‐Phase Production
化石组合内的千禧年尺度年龄偏移:埋藏活动区以下生物扰动和阶段外生产的结果
- DOI:10.1029/2018pa003553
- 发表时间:2019
- 期刊:
- 影响因子:3.5
- 作者:Tomašových, A.;Kidwell, S. M.;Alexander, C. R.;Kaufman, D. S.
- 通讯作者:Kaufman, D. S.
Testing the effect of oxidizing pre-treatments on amino acids in benthic and planktic foraminifera tests
在底栖和浮游有孔虫测试中测试氧化预处理对氨基酸的影响
- DOI:10.1016/j.quageo.2022.101401
- 发表时间:2022
- 期刊:
- 影响因子:2.7
- 作者:Millman, Emily;Wheeler, Lucy;Billups, Katharina;Kaufman, Darrell;Penkman, Kirsty E.H.
- 通讯作者:Penkman, Kirsty E.H.
Can amino acid racemization be utilized for fish age validation?
- DOI:10.1139/cjfas-2022-0161
- 发表时间:2023-02-01
- 期刊:
- 影响因子:2.4
- 作者:Chamberlin, Derek W.;Shervette, Virginia R.;Patterson III, William F.
- 通讯作者:Patterson III, William F.
NOAA/WDS Paleoclimatology - Quaternary Arctic Ocean Foraminifer Amino Acid Racemization Data
NOAA/WDS 古气候学 - 第四纪北冰洋有孔虫氨基酸外消旋化数据
- DOI:10.25921/bx56-4d69
- 发表时间:2023
- 期刊:
- 影响因子:0
- 作者:West, G.;Kaufman, D.S.;Jakobsson, M.;O'Regan, M.
- 通讯作者:O'Regan, M.
The Whale Point Formation: A stratigraphic record of high-frequency climate and sea-level fluctuations in the Bahamas during Marine Isotope Stage 5a (ca. 80 ka BP)
鲸鱼点地层:海洋同位素阶段 5a(约 80 ka BP)期间巴哈马高频气候和海平面波动的地层记录
- DOI:10.1016/j.sedgeo.2022.106107
- 发表时间:2022
- 期刊:
- 影响因子:2.8
- 作者:Kindler, Pascal;Hearty, Paul J.
- 通讯作者:Hearty, Paul J.
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Darrell Kaufman其他文献
奈良文化財研究所における情報技術を活用した史料の利活用の促進
奈良文化财研究所利用信息技术推进历史资料的利用
- DOI:
- 发表时间:
2016 - 期刊:
- 影响因子:0
- 作者:
Julien Emile-Geay;Nicholas McKay;Darrell Kaufman;Lucien von Gunten;Jianghao Wang;Kevin Anchukaitis;Nerilie Abram;Jason Addison;Mark Curran;Michael Evans et al. (計99名、K. Kawamura58番目);馬場 基 - 通讯作者:
馬場 基
Channel change, sediment transport, and fish habitat in a coastal stream: Effects of an extreme event
- DOI:
10.1007/bf01871443 - 发表时间:
1985-01-01 - 期刊:
- 影响因子:3.000
- 作者:
Robert Coats;Laurel Collins;Joan Florsheim;Darrell Kaufman - 通讯作者:
Darrell Kaufman
Darrell Kaufman的其他文献
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{{ truncateString('Darrell Kaufman', 18)}}的其他基金
Testing amino acid paleothermometry in radiocarbon-dated lake sediment
测试放射性碳测年湖泊沉积物中的氨基酸古温度测定法
- 批准号:
2317409 - 财政年份:2023
- 资助金额:
$ 30.81万 - 项目类别:
Standard Grant
Collaborative Research: Paleo Records Of GLacier And Climate changes Inferred from Alaskan Lakes (PROGLACIAL)
合作研究:从阿拉斯加湖泊推断的冰川和气候变化的古记录(PROGLACIAL)
- 批准号:
2303462 - 财政年份:2023
- 资助金额:
$ 30.81万 - 项目类别:
Standard Grant
Collaborative Research: Comparative Taphonomy and Time-Averaging of Mollusk-Echinoid Assemblages using High-Performance Radiocarbon Dating System
合作研究:使用高性能放射性碳测年系统对软体动物-海胆组合进行比较埋藏学和时间平均
- 批准号:
2127644 - 财政年份:2021
- 资助金额:
$ 30.81万 - 项目类别:
Standard Grant
Collaborative Research: Toward placing contemporary Arctic summer warming in a millennial perspective with a pan-Arctic record of Neoglacial crysophere expansion
合作研究:通过新冰川期冰冻圈扩张的泛北极记录,从千禧年的角度看待当代北极夏季变暖
- 批准号:
2100379 - 财政年份:2021
- 资助金额:
$ 30.81万 - 项目类别:
Standard Grant
Collaborative research: Climate controls on carbon accumulation in upland permafrost at millennial scales
合作研究:千年尺度上气候对高地永久冻土碳积累的控制
- 批准号:
1844205 - 财政年份:2020
- 资助金额:
$ 30.81万 - 项目类别:
Standard Grant
Tapping outstanding new lake records of annual- to millennial-scale Holocene climate variability in the north Pacific region
挖掘北太平洋地区年至千年尺度全新世气候变化的杰出新湖泊记录
- 批准号:
1602106 - 财政年份:2016
- 资助金额:
$ 30.81万 - 项目类别:
Continuing Grant
P2C2: Synthesis of Holocene Proxy Climate Records from Western North America
P2C2:北美西部全新世代理气候记录的综合
- 批准号:
1602105 - 财政年份:2016
- 资助金额:
$ 30.81万 - 项目类别:
Continuing Grant
Facilities Support: Amino Acid Geochronology Laboratory
设施支持:氨基酸年代学实验室
- 批准号:
1234413 - 财政年份:2012
- 资助金额:
$ 30.81万 - 项目类别:
Continuing Grant
A Postdoctoral Scientist to Synthesize Proxy Records of Arctic Holocene Climate
博士后科学家合成北极全新世气候的代理记录
- 批准号:
1107869 - 财政年份:2011
- 资助金额:
$ 30.81万 - 项目类别:
Standard Grant
Collaborative Research: Resolving centennial- to millennial-scale trends in glacier extent and lake sedimentation in the Brooks Range, Arctic Alaska
合作研究:解决阿拉斯加北极地区布鲁克斯山脉冰川范围和湖泊沉积的百年至千年尺度趋势
- 批准号:
1107662 - 财政年份:2011
- 资助金额:
$ 30.81万 - 项目类别:
Standard Grant
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