A new approach to Ar/Ar thermochronology: investigating the effects of recrystallisation and deformation on alkali feldspar crystals

Ar/Ar 热年代学的新方法:研究再结晶和变形对碱长石晶体的影响

基本信息

  • 批准号:
    NE/E018629/1
  • 负责人:
  • 金额:
    $ 42.22万
  • 依托单位:
  • 依托单位国家:
    英国
  • 项目类别:
    Research Grant
  • 财政年份:
    2008
  • 资助国家:
    英国
  • 起止时间:
    2008 至 无数据
  • 项目状态:
    已结题

项目摘要

Earth Scientists have measured the age of many of the most important events in Earth history using radioactive decay of common elements such as uranium and potassium. As a result, we know the Earth formed some 4550 million years ago, life emerged around 540 million years ago and a meteorite hit the Earth in Mexico 65.5 million years ago, at the same time as huge volcanic eruptions in India. However, the absolute ages of events are only a small part of the story, the rate at which Earth processes happen is more important for our understanding of how the Earth works. Although it is a common conception that geological processes are slow, a great deal of modern Earth Science is studying processes which take place over timescales considerably shorter that a million years. In fact it is the rates of geological processes which really matter in understanding the interaction of the solid Earth with the oceans and atmosphere, and control our environment. The rates of geological processes are however far more difficult to measure than the absolute ages of events such as volcano eruptions. The particular the processes which challenge even our present state of knowledge include the very processes that have shaped the Earth's surface in the distant past, processes such as fluid flow through rocks, mountain elevation, fault movements, and the rates of sediment flow into deep ocean basins. Quantifying such processes is crucial to understanding the interdependence of our past and present environments with the solid Earth. I the last few years we have developed techniques at The Open University to date very small samples using a technique that involves drilling holes less than one tenth of a millimetre across using a focussed UV laser beam. With this technique we have been able to advance dating of some of the very processes mentioned above. We have measured the heating of rocks during igneous intrusion, the rates of mountain building events, the rates of sediment dispersal, and the ages of fault movements using a range of similar techniques. In particular, a project involving all the members of the present team, measured the rates of ancient fluid flow in hydrocarbon reservoir sandstones. The work was published in the journal 'Science' (Mark et al. 2005), and showed that by combining dates for mineral overgrowths on single sand grains and studying minute inclusions of fluid, we could determine when fluid flowed, for how long and at what temperatures. During this work we realised that the combination of techniques used to understand the mineral overgrowths could also be applied to improve our understanding of other alkali feldspars which are found in the majority of crustal rocks but have complex microstructure and have proved difficult to use in the past. We believe that by applying techniques developed during the earlier project we can make a step change in measuring the rates of geological processes in crustal rocks and thus address some of the most important processes in the interaction between the changing environment and the solid Earth.
地球科学家利用铀和钾等常见元素的放射性衰变测量了地球历史上许多最重要事件的年龄。因此,我们知道地球形成于大约45.5亿年前,生命出现于大约5.4亿年前,6550万年前一颗陨石在墨西哥撞击地球,同时印度发生了巨大的火山爆发。然而,事件的绝对年龄只是故事的一小部分,地球过程发生的速率对于我们理解地球如何运作更重要。虽然人们普遍认为地质过程是缓慢的,但大量的现代地球科学正在研究在短于一百万年的时间尺度上发生的过程。事实上,地质过程的速率在理解固体地球与海洋和大气的相互作用以及控制我们的环境方面真正重要。然而,地质过程的速率比火山爆发等事件的绝对年龄更难测量。甚至对我们目前的知识水平构成挑战的特殊过程,包括在遥远的过去塑造地球表面的过程,如流体流过岩石、山脉上升、断层运动和沉积物流入深海盆地的速度。量化这些过程对于理解我们过去和现在的环境与固体地球的相互依存关系至关重要。在过去的几年里,我们在开放大学开发了一种技术,可以使用一种技术对非常小的样品进行日期确定,该技术涉及使用聚焦紫外激光束钻孔,直径小于十分之一毫米。有了这项技术,我们已经能够提前确定上面提到的一些过程的年代。我们已经测量了加热的岩石在火成岩侵入,造山事件的速率,沉积物的扩散率,并使用一系列类似的技术断层运动的年龄。特别是,一个涉及本团队所有成员的项目,测量了油气储层砂岩中古代流体流动的速率。这项工作发表在《科学》杂志上(马克等人,2005年),并表明通过结合单个沙粒上矿物过度生长的日期和研究流体的微小内含物,我们可以确定流体何时流动,多长时间以及在什么温度下流动。在这项工作中,我们意识到,用于了解矿物过度生长的技术组合也可以应用于提高我们对其他碱性长石的了解,这些长石在大多数地壳岩石中发现,但具有复杂的微观结构,过去已证明难以使用。我们相信,通过应用在早期项目中开发的技术,我们可以在测量地壳岩石中地质过程的速率方面取得进展,从而解决不断变化的环境与固体地球之间相互作用中的一些最重要的过程。

项目成果

期刊论文数量(4)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Spatially heterogeneous argon-isotope systematics and apparent 40Ar/39Ar ages in perlitised obsidian
  • DOI:
    10.1016/j.chemgeo.2017.05.018
  • 发表时间:
    2018-03-05
  • 期刊:
  • 影响因子:
    3.9
  • 作者:
    Flude, Stephanie;Tuffen, Hugh;Sherlock, Sarah C.
  • 通讯作者:
    Sherlock, Sarah C.
Cryptic microtextures and geological histories of K-rich alkali feldspars revealed by charge contrast imaging
电荷对比成像揭示富钾碱长石的隐秘微观结构和地质历史
Observation of centimetre-scale argon diffusion in alkali feldspars: implications for 40 Ar/ 39 Ar thermochronology
碱长石中厘米级氩扩散的观察:对 40 Ar/ 39 Ar 热年代学的影响
Disturbance to the 40Ar/39Ar system in feldspars by electron and ion beam irradiation
  • DOI:
    10.1016/j.chemgeo.2013.07.003
  • 发表时间:
    2013-09-26
  • 期刊:
  • 影响因子:
    3.9
  • 作者:
    Flude, S.;Sherlock, S. C.;Kelley, S. P.
  • 通讯作者:
    Kelley, S. P.
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Sarah Sherlock其他文献

FRI110 - Results of the Non-invasive Biomarkers of Metabolic Liver Disease (NIMBLE) study 1.1 on the reproducibility and repeatability of shear-wave and transient elastography in non-alcoholic fatty liver disease
FRI110 - 关于非酒精性脂肪性肝病中剪切波和瞬时弹性成像的再现性和重复性的代谢性肝病无创生物标志物(NIMBLE)研究 1.1 的结果
  • DOI:
    10.1016/s0168-8278(22)01239-9
  • 发表时间:
    2022-07-01
  • 期刊:
  • 影响因子:
    33.000
  • 作者:
    Theodore Pierce;Arinc Ozturk;Sarah Sherlock;Guilherme Cunha;Xiaohong Wang;Qian Li;Marian Martin;Hannah Edenbaum;Kathleen Corey;Yesenia Covarrubias;Sudha Shankar;Helen Heymann;Tania Kamphaus;Roberto Calle;Nancy Obuchowski;Arun Sanyal;Rohit Loomba;Claude Sirlin;Kathryn Fowler;Anthony Samir
  • 通讯作者:
    Anthony Samir
2119 Visualization of micro-vasculature using FeCo-core/graphitic-carbon-shell nanocrystals and high-resolution 3D spiral imaging
  • DOI:
    10.1186/1532-429x-10-s1-a388
  • 发表时间:
    2008-10-22
  • 期刊:
  • 影响因子:
  • 作者:
    Jin Hyung Lee;Masahiro Terashima;Won Seok Seo;Hisanori Kosuge;Sarah Sherlock;Michael McConnell;Dwight Nishimura;Hongjie Daiv
  • 通讯作者:
    Hongjie Daiv
SAT073 - Validation of the ADAPT score for the diagnosis of clinically significant fibrosis in patients with non-alcoholic fatty liver disease (NAFLD)
SAT073 - 用于诊断非酒精性脂肪性肝病(NAFLD)患者临床显著纤维化的 ADAPT 评分的验证
  • DOI:
    10.1016/s0168-8278(22)01719-6
  • 发表时间:
    2022-07-01
  • 期刊:
  • 影响因子:
    33.000
  • 作者:
    Arun Sanyal;Sudha Shankar;Katherine Yates;Clayton Dehn;James Bolognese;Brent Tetri;Kris Kowdley;Raj Vuppalanchi;Mohammad Siddiqui;Cynthia Behling;James Tonascia;Anthony Samir;Claude Sirlin;Sarah Sherlock;Kathryn Fowler;Helen Heymann;Tania Kamphaus;Rohit Loomba;Roberto Calle
  • 通讯作者:
    Roberto Calle
2105 Graphite/metal core-shell nanocrystals as MRI contrast agents to detect vascular inflammation
  • DOI:
    10.1186/1532-429x-10-s1-a374
  • 发表时间:
    2008-10-22
  • 期刊:
  • 影响因子:
  • 作者:
    Hisanori Kosuge;Masahiro Terashima;Sarah Sherlock;Jin Hyung Lee;Hongjie Dai;Michael V McConnell
  • 通讯作者:
    Michael V McConnell
FRI107 - Peformance of fibrometer-derived biomarker panels for assessment of fibrosis stage in NAFLD: NIMBLE stage 1 and the NASH CRN collaborative Study
FRI107 - 纤维仪衍生生物标志物组用于评估非酒精性脂肪性肝病纤维化阶段的性能:NIMBLE 阶段 1 和 NASH CRN 合作研究
  • DOI:
    10.1016/s0168-8278(22)01236-3
  • 发表时间:
    2022-07-01
  • 期刊:
  • 影响因子:
    33.000
  • 作者:
    Rohit Loomba;Sudha Shankar;Katherine Yates;Clayton Dehn;James Bolognese;Brent Tetri;Kris Kowdley;Raj Vuppalanchi;Cynthia Guy;James Tonascia;Anthony Samir;Claude Sirlin;Sarah Sherlock;Kathryn Fowler;Helen Heymann;Tania Kamphaus;Roberto Calle;Arun Sanyal
  • 通讯作者:
    Arun Sanyal

Sarah Sherlock的其他文献

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{{ truncateString('Sarah Sherlock', 18)}}的其他基金

Understanding excess argon by ultra-high resolution 40Ar/39Ar laserprobe analysis
通过超高分辨率 40Ar/39Ar 激光探针分析了解过量氩气
  • 批准号:
    NE/F020066/1
  • 财政年份:
    2009
  • 资助金额:
    $ 42.22万
  • 项目类别:
    Research Grant
A new approach to Ar/Ar thermochronology: investigating the effects of recrystallisation and deformation on alkali feldspar crystals
Ar/Ar 热年代学的新方法:研究再结晶和变形对碱长石晶体的影响
  • 批准号:
    NE/E016294/1
  • 财政年份:
    2008
  • 资助金额:
    $ 42.22万
  • 项目类别:
    Research Grant

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