Viscous relaxation of crust of the Sudbury impact structure, Canada

加拿大萨德伯里撞击结构地壳的粘性松弛

基本信息

  • 批准号:
    285706348
  • 负责人:
  • 金额:
    --
  • 依托单位:
  • 依托单位国家:
    德国
  • 项目类别:
    Research Grants
  • 财政年份:
    2015
  • 资助国家:
    德国
  • 起止时间:
    2014-12-31 至 2020-12-31
  • 项目状态:
    已结题

项目摘要

Knowledge of long-term modification processes of terrestrial impact structures is rather sparse but paramount for understanding large-meteorite impact processes, not only on Earth. The proposed project will remedy this knowledge gap by conducting a systematic analysis of structures, genetically associated with cooling and solidification of the Sudbury Igneous Complex (SIC), the relic of the impact melt sheet of the Sudbury impact structure, Canada. The objective of the project is to elucidate to what extend these structures adhere to impact-induced, long-term crustal relaxation versus static cooling of the SIC and underlying target rocks. Specifically, mineral fabrics and granitoid dikes of the SIC are used to elucidate the evolution of the upper-crustal strain field during long-term crater modification at Sudbury. The incremental change of mineral fabric geometry and mapped dike patterns will be compared to strain paths obtained from scaled analogue experiments addressing viscous crustal relaxation of impact craters. Results of field-based structural analyses and analogue experiments will be compared to surface strain patterns of pristine, i.e., non-eroded, impact structures on other planets. Owing to the excellent exposure, access and post-impact tilting of impact-generated lithologies and structures, Sudbury appears to be the only large, terrestrial impact structure that allows for a structural analysis aimed at unraveling long-term modification of a terrestrial impact basin. Besides promising to provide the first quantitative structural evidence for long-term crater modification on Earth, the study is also important in terms of designing exploration strategies of Cu-Ni and platinum group element-rich ore deposits at Sudbury.
陆地撞击结构的长期变化过程的知识相当稀少,但对于理解大型陨石撞击过程至关重要,不仅仅是在地球上。拟议的项目将通过对结构进行系统分析来弥补这一知识空白,这些结构与加拿大萨德伯里撞击结构的熔融板的遗迹萨德伯里火成岩复合体(SIC)的冷却和凝固有关。该项目的目的是阐明这些结构在多大程度上坚持撞击诱发的长期地壳松弛,而不是SIC和下伏目标岩石的静态冷却。具体而言,利用碳化硅矿物组构和花岗岩类岩脉来解释萨德伯里长期陨石坑改造过程中地壳上层应变场的演化。矿物结构几何形状的增量变化和绘制的岩脉图案将与从模拟实验中获得的应变路径进行比较,模拟实验解决了撞击坑的粘性地壳松弛问题。现场结构分析和模拟实验的结果将与其他行星上原始(即未受侵蚀的)撞击结构的表面应变模式进行比较。由于出色的暴露、接近和撞击后倾斜的撞击产生的岩性和结构,萨德伯里似乎是唯一的大型陆地撞击构造,可以进行旨在揭示陆地撞击盆地长期变化的结构分析。除了有望为地球上长期陨石坑改造提供第一个定量结构证据外,该研究对设计Sudbury富Cu-Ni和铂族元素矿床的勘探策略也很重要。

项目成果

期刊论文数量(6)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
3-D kinematic restoration of the eastern Sudbury Igneous Complex, Canada, and its importance for Cu-Ni-PGE sulphide exploration
加拿大东部萨德伯里火成岩杂岩体的 3D 运动学恢复及其对 Cu-Ni-PGE 硫化物勘探的重要性
  • DOI:
    10.1016/j.oregeorev.2018.07.019
  • 发表时间:
    2018
  • 期刊:
  • 影响因子:
    3.3
  • 作者:
    Riller
  • 通讯作者:
    Riller
Thermo‐mechanical interaction of a large impact melt sheet with adjacent target rock, Sudbury impact structure, Canada
大型冲击熔体片与相邻目标岩石的热机械相互作用,萨德伯里冲击结构,加拿大
  • DOI:
    10.1111/maps.13268
  • 发表时间:
    2019
  • 期刊:
  • 影响因子:
    2.2
  • 作者:
    Göllner;Wüstemann;Bendschneider;Reimers;Gibson;Lightfoot;Riller
  • 通讯作者:
    Riller
Genetic Relationship Between Postcratering Dynamics and Footwall Deposit Formation at Sudbury, Ontario, Canada: Importance for Sulfide Ore Exploration
加拿大安大略省萨德伯里火山口后动力学与下盘矿床形成之间的遗传关系:对硫化矿勘探的重要性
  • DOI:
    10.5382/econgeo.4655
  • 发表时间:
    2019
  • 期刊:
  • 影响因子:
    5.8
  • 作者:
    Wüstemann;Göllner;Lightfoot;Riller
  • 通讯作者:
    Riller
Modeling the geochemical evolution of impact melts in terrestrial impact basins: Vredefort granophyre dikes and Sudbury offset dikes
模拟陆地冲击盆地冲击熔体的地球化学演化:Vredefort 花岗岩脉和 Sudbury 偏置岩脉
Structural controls on the localization of the mineralized Copper Cliff embayment and the Copper Cliff Offset dyke, Sudbury Igneous Complex, Canada
对加拿大萨德伯里火成岩矿化铜崖海湾和铜崖偏移堤坝本地化的结构控制
  • DOI:
    10.1016/j.oregeorev.2021.104071
  • 发表时间:
    2021
  • 期刊:
  • 影响因子:
    3.3
  • 作者:
    Mathieu;Riller;Gibson;Lightfoot
  • 通讯作者:
    Lightfoot
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Professor Dr. Ulrich Peter Riller其他文献

Professor Dr. Ulrich Peter Riller的其他文献

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{{ truncateString('Professor Dr. Ulrich Peter Riller', 18)}}的其他基金

Volcano-tectonics under intra-arc transpression
弧内转压下的火山构造
  • 批准号:
    355640964
  • 财政年份:
    2018
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Mechanisms of target-rock deformation during peak-ring formation
峰环形成过程中靶岩变形机制
  • 批准号:
    343434615
  • 财政年份:
    2017
  • 资助金额:
    --
  • 项目类别:
    Infrastructure Priority Programmes
Structure of the Southern Province, Canadian Shield, inferred from scaled 3-D analogue modelling using viscous and granular materials
加拿大地盾南部省的结构,根据使用粘性和颗粒材料的按比例 3D 模拟建模推断
  • 批准号:
    33382742
  • 财政年份:
    2006
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Structural analysis and remote sensing of the East Range, Sudbury Impact Structure, Canada
加拿大萨德伯里冲击结构东部山脉的结构分析和遥感
  • 批准号:
    5423657
  • 财政年份:
    2004
  • 资助金额:
    --
  • 项目类别:
    Infrastructure Priority Programmes
Kinematics of peak-ring rock deformation during cratering
陨石坑过程中峰环岩石变形的运动学
  • 批准号:
    537648925
  • 财政年份:
  • 资助金额:
    --
  • 项目类别:
    Infrastructure Priority Programmes
RELAX – Crustal relaxation below large impact craters inferred from novel imaging of analogue experiments
RELAX â 从模拟实验的新颖成像推断出大型撞击坑下方的地壳松弛
  • 批准号:
    457039485
  • 财政年份:
  • 资助金额:
    --
  • 项目类别:
    Research Grants

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