Collaborative Research: Development of 40Ar/39Ar Intercalibration Pipettes
合作研究:开发40Ar/39Ar相互校准移液器
基本信息
- 批准号:1057610
- 负责人:
- 金额:$ 2.93万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Continuing Grant
- 财政年份:2011
- 资助国家:美国
- 起止时间:2011-06-01 至 2013-05-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Potassium (K), one of the more abundant elements in the Earth?s crust is found in many rock forming minerals. One of the isotopes of K, 40K is radioactive and decays to 40Ar. This scheme forms the physical basis for one of the most common geochronologic techniques applied to rocks and minerals. In recent years, a special technique requiring neutron bombardment of samples to produce 39Ar from 39K has become more favored than the traditional ?K-Ar? method, referred to as the 40Ar/39Ar method. In fact, the 40Ar/39Ar method of radioisotopic dating has the broadest range of applicability of any geochronometer, being useful from early solar system formation (~4.56 billion years ago) to volcanic materials as young as 2,000 years old. These studies cover topics such as volcanic and seismic hazards, timing and extent of mineralization events, global climate change and variability, paleomagnetic reversal timescale, and dating the fossil record, including human evolution. Thus any improvement in the accuracy and precision 40Ar/39Ar method will improve our understanding of the timing and rates of geologic processes.Despite exemplary precision, recent experiments conducted via the EARTHTIME initiative have revealed significant interlaboratory inconsistencies such that ages determined by different labs may vary by us much as 4 %, approximately an order of magnitude larger than typical reported measurement precision. Four possible causes for these discrepancies have been identified; 1) differences in the data reduction protocols employed by the participating laboratories; 2) unaccounted nonlinearity of the mass spectrometer source/detector systems used to collect the data; 3) unrecognized heterogeneity in the mineral standards or an experimental artifact arising from variations in neutron irradiation dosage in some of the sample packages; and 4) incomplete degassing or isotopic fractionation of Ar from the analyzed sanidines in various laboratories. This research project addresses the issue of interlaboratory consistency by developing an argon pipette system that will travel between the participating 40Ar/39Ar labs within the United States. The pipette system will deliver gas samples with exactly the same isotopic composition(s) and similar gas volume(s), thus controlling the variables and issues associated with heterogeneity of natural samples. In addition, variable gas sample volumes from the pipette system will also be measured to assess the response linearity of noble gas mass spectrometers. The ultimate goal of this study is to intercalibrate the various NSF supported 40Ar/39Ar laboratories and allow for the direct comparison of the ages produced from the participating labs, at the level of 0.1% or better. The long-term use of the pipette system will maintain the calibration between the 40Ar/39Ar laboratories. Undergraduate and graduate students will be traveling with the intercalibration pipette assisting with the measurements. This will provide the students the opportunity to see, work, and interact with personnel from the different 40Ar/39Ar laboratories and serve as a unique training opportunity for the next generation of geochronologist/isotope geochemists.
钾(K)是地球上最丰富的元素之一。地壳中发现了许多岩石形成的矿物。K的同位素之一,40 K具有放射性,可衰变为40 Ar。这一方案构成了应用于岩石和矿物的最常见的地质年代学技术之一的物理基础。近年来,一种特殊的技术,需要中子轰击样品,以产生39 Ar从39 K已成为比传统的青睐?K-Ar?方法,称为40 Ar/39 Ar方法。事实上,40 Ar/39 Ar放射性同位素测年法在任何地质年代计中具有最广泛的适用性,从早期太阳系形成(约45.6亿年前)到2,000年前的火山物质都很有用。这些研究涵盖的主题包括火山和地震灾害、矿化事件的时间和程度、全球气候变化和变异、古地磁反转时间尺度以及化石记录的年代测定,包括人类进化。 因此,任何对40 Ar/39 Ar方法准确性和精确度的改进都将提高我们对地质作用时间和速率的理解。尽管精确度堪称典范,但最近通过EARTHTIME倡议进行的实验显示了显著的实验室间不一致性,例如不同实验室确定的年龄可能会相差4%,大约比典型的测量精度大一个数量级。已查明造成这些差异的四个可能原因:1)参与实验室采用的数据简化协议的差异; 2)用于收集数据的质谱仪源/检测器系统的未考虑的非线性; 3)矿物标准中未被识别的异质性或某些样品包中中子辐照剂量变化引起的实验人为因素;(4)不同实验室分析的透长石中Ar的不完全脱气或同位素分馏。该研究项目通过开发一种氩移液管系统来解决实验室间一致性的问题,该系统将在美国参与的40 Ar/39 Ar实验室之间移动。移液管系统将输送具有完全相同的同位素组成和相似的气体体积的气体样品,从而控制与天然样品的异质性相关的变量和问题。此外,还将测量来自移液管系统的可变气体样品体积,以评估惰性气体质谱仪的响应线性。这项研究的最终目标是相互校准各种NSF支持的40 Ar/39 Ar实验室,并允许直接比较参与实验室产生的年龄,在0.1%或更好的水平。移液管系统的长期使用将保持40 Ar/39 Ar实验室之间的校准。本科生和研究生将携带相互校准移液器进行测量。这将使学生有机会看到,工作,并与来自不同的40 Ar/39 Ar实验室的人员互动,并作为下一代地质年代学家/同位素地球化学家的独特培训机会。
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 }}
Sidney Hemming其他文献
The Maud Belt (East Antarctica) as an accretionary orogen in Rodinia: Isotopic composition, evolution and spatial variation
- DOI:
10.1016/j.gr.2025.05.026 - 发表时间:
2025-10-01 - 期刊:
- 影响因子:8.600
- 作者:
Cheng-Cheng Wang;Joachim Jacobs;Horst R. Marschall;Sidney Hemming;Guillaume Jacques;Andreas Läufer - 通讯作者:
Andreas Läufer
West Antarctic ice retreat and paleoceanography in the Amundsen Sea in the warm early Pliocene
早更新世温暖时期阿蒙森海的西南极冰消退与古海洋学
- DOI:
10.1038/s41467-025-60772-8 - 发表时间:
2025-07-01 - 期刊:
- 影响因子:15.700
- 作者:
Sandra Passchier;Claus-Dieter Hillenbrand;Sidney Hemming;Werner Ehrmann;Thomas Frederichs;Steve M. Bohaty;Ronald Leon;Olga Libman-Roshal;Lisbeth Mino-Moreira;Karsten Gohl;Julia Wellner - 通讯作者:
Julia Wellner
Sidney Hemming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('Sidney Hemming', 18)}}的其他基金
Collaborative Research: US GEOTRACES GP17-OCE: Understanding neodymium isotopes and rare earth element systematics in the South Pacific
合作研究:US GEOTRACES GP17-OCE:了解南太平洋的钕同位素和稀土元素系统学
- 批准号:
2049604 - 财政年份:2021
- 资助金额:
$ 2.93万 - 项目类别:
Standard Grant
Collaborative Research: Linking Marine and Terrestrial Sedimentary Evidence for Plio-pleistocene Variability of Weddell Embayment and Antarctic Peninsula Glaciation
合作研究:将海洋和陆地沉积证据联系起来,了解威德尔海湾和南极半岛冰川的上里奥-更新世变化
- 批准号:
2114763 - 财政年份:2021
- 资助金额:
$ 2.93万 - 项目类别:
Standard Grant
Collaborative Research: EAGER: Development of a Method for Paired Potassium/Argon Geochronology and Strontium-Neodymium-Lead Radiogenic Isotope Geochemistry of Dust in Ice Cores
合作研究:EAGER:开发冰芯尘埃配对钾/氩地质年代学和锶-钕-铅放射性同位素地球化学方法
- 批准号:
2032849 - 财政年份:2020
- 资助金额:
$ 2.93万 - 项目类别:
Standard Grant
Collaborative Research: Examining linkages between the Agulhas Leakage and ocean overturning in the last glacial cycle and through the mid-Pleistocene transition
合作研究:研究末次冰河周期和中更新世过渡期间阿加勒斯泄漏与海洋翻转之间的联系
- 批准号:
1831415 - 财政年份:2018
- 资助金额:
$ 2.93万 - 项目类别:
Standard Grant
Acquisition of a State-of-the-Art 40Ar/39Ar Geochronology System for the AGES Lab at Lamont-Doherty Earth Observatory
为拉蒙特-多尔蒂地球观测站 AGES 实验室采购最先进的 40Ar/39Ar 地质年代学系统
- 批准号:
1636685 - 财政年份:2016
- 资助金额:
$ 2.93万 - 项目类别:
Standard Grant
Collaborative Research: East Antarctic Glacial Landscape Evolution (EAGLE): A Study using Combined Thermochronology, Geochronology and Provenance Analysis
合作研究:东南极冰川景观演化(EAGLE):综合热年代学、地质年代学和起源分析的研究
- 批准号:
1443565 - 财政年份:2016
- 资助金额:
$ 2.93万 - 项目类别:
Standard Grant
EAGER: Proof of concept: U-Th Dating of Lake-level History at Mono Basin, CA
EAGER:概念证明:加州莫诺盆地湖面历史 U-Th 测年
- 批准号:
1353272 - 财政年份:2013
- 资助金额:
$ 2.93万 - 项目类别:
Standard Grant
COLLABORATIVE RESEARCH: EAGER: Evaluating the Larsen basin's suitability for testing the Cretaceous Glaciation Hypothesis
合作研究:EAGER:评估拉森盆地测试白垩纪冰川假说的适用性
- 批准号:
1241574 - 财政年份:2012
- 资助金额:
$ 2.93万 - 项目类别:
Standard Grant
Collaborative Research: East Antarctic outlet glacier contributions to the Ross Sea from chronology of detrital grains
合作研究:从碎屑颗粒年代学来看东南极出口冰川对罗斯海的贡献
- 批准号:
1043619 - 财政年份:2010
- 资助金额:
$ 2.93万 - 项目类别:
Standard Grant
Collaborative Research: Erosion History and Sediment Provenance of East Antarctica from Multi-method Detrital Geo- and Thermochronology
合作研究:多方法碎屑地质年代学和热年代学研究东南极洲的侵蚀历史和沉积物来源
- 批准号:
0838729 - 财政年份:2009
- 资助金额:
$ 2.93万 - 项目类别:
Standard Grant
相似国自然基金
Research on Quantum Field Theory without a Lagrangian Description
- 批准号:24ZR1403900
- 批准年份:2024
- 资助金额:0.0 万元
- 项目类别:省市级项目
Cell Research
- 批准号:31224802
- 批准年份:2012
- 资助金额:24.0 万元
- 项目类别:专项基金项目
Cell Research
- 批准号:31024804
- 批准年份:2010
- 资助金额:24.0 万元
- 项目类别:专项基金项目
Cell Research (细胞研究)
- 批准号:30824808
- 批准年份:2008
- 资助金额:24.0 万元
- 项目类别:专项基金项目
Research on the Rapid Growth Mechanism of KDP Crystal
- 批准号:10774081
- 批准年份:2007
- 资助金额:45.0 万元
- 项目类别:面上项目
相似海外基金
Collaborative Research: RESEARCH-PGR: Development of epigenetic editing for crop improvement
合作研究:RESEARCH-PGR:用于作物改良的表观遗传编辑的开发
- 批准号:
2331437 - 财政年份:2024
- 资助金额:
$ 2.93万 - 项目类别:
Standard Grant
Collaborative Research: Broadening Instructional Innovation in the Chemistry Laboratory through Excellence in Curriculum Development
合作研究:通过卓越的课程开发扩大化学实验室的教学创新
- 批准号:
2337028 - 财政年份:2024
- 资助金额:
$ 2.93万 - 项目类别:
Continuing Grant
Collaborative Research: CAS: Exploration and Development of High Performance Thiazolothiazole Photocatalysts for Innovating Light-Driven Organic Transformations
合作研究:CAS:探索和开发高性能噻唑并噻唑光催化剂以创新光驱动有机转化
- 批准号:
2400166 - 财政年份:2024
- 资助金额:
$ 2.93万 - 项目类别:
Continuing Grant
Collaborative Research: Broadening Instructional Innovation in the Chemistry Laboratory through Excellence in Curriculum Development
合作研究:通过卓越的课程开发扩大化学实验室的教学创新
- 批准号:
2337027 - 财政年份:2024
- 资助金额:
$ 2.93万 - 项目类别:
Continuing Grant
Collaborative Research: RESEARCH-PGR: Development of epigenetic editing for crop improvement
合作研究:RESEARCH-PGR:用于作物改良的表观遗传编辑的开发
- 批准号:
2331438 - 财政年份:2024
- 资助金额:
$ 2.93万 - 项目类别:
Standard Grant
Collaborative Research: A Multi-Lab Investigation of the Conceptual Foundations of Early Number Development
合作研究:早期数字发展概念基础的多实验室调查
- 批准号:
2405548 - 财政年份:2024
- 资助金额:
$ 2.93万 - 项目类别:
Standard Grant
Collaborative Research: CAS: Exploration and Development of High Performance Thiazolothiazole Photocatalysts for Innovating Light-Driven Organic Transformations
合作研究:CAS:探索和开发高性能噻唑并噻唑光催化剂以创新光驱动有机转化
- 批准号:
2400165 - 财政年份:2024
- 资助金额:
$ 2.93万 - 项目类别:
Continuing Grant
Collaborative Research: HNDS-I. Mobility Data for Communities (MD4C): Uncovering Segregation, Climate Resilience, and Economic Development from Cell-Phone Records
合作研究:HNDS-I。
- 批准号:
2420945 - 财政年份:2024
- 资助金额:
$ 2.93万 - 项目类别:
Standard Grant
SBP: Collaborative Research: Improving Engagement with Professional Development Programs by Attending to Teachers' Psychosocial Experiences
SBP:协作研究:通过关注教师的社会心理体验来提高对专业发展计划的参与度
- 批准号:
2314254 - 财政年份:2023
- 资助金额:
$ 2.93万 - 项目类别:
Standard Grant
Collaborative Research: Frameworks: FZ: A fine-tunable cyberinfrastructure framework to streamline specialized lossy compression development
合作研究:框架:FZ:一个可微调的网络基础设施框架,用于简化专门的有损压缩开发
- 批准号:
2311878 - 财政年份:2023
- 资助金额:
$ 2.93万 - 项目类别:
Standard Grant