Diamond resorption in kimberlite and the mantle

金伯利岩和地幔中的金刚石吸收

基本信息

  • 批准号:
    488867-2015
  • 负责人:
  • 金额:
    $ 1.21万
  • 依托单位:
  • 依托单位国家:
    加拿大
  • 项目类别:
    Collaborative Research and Development Grants
  • 财政年份:
    2015
  • 资助国家:
    加拿大
  • 起止时间:
    2015-01-01 至 2016-12-31
  • 项目状态:
    已结题

项目摘要

The majority of gem diamonds are mined from kimberlites - the deeply formed volcanic rocks, which carry diamonds from their growth region in the Earth's mantle to the surface. The diamond quality and grade can vary considerably even in neighboring kimberlite pipes. During residence in the mantle and ascent in kimberlite magma, diamond undergo partial dissolution and develop resorption features, which are sensitive to the conditions of the surrounding media. The existing diamond exploration methods use chemical composition of mantle-derived minerals to confirm their origin in the diamondiferous parts of the mantle. However, the surface morphology of diamond and other mantle minerals contain a wealth of unexplored information about the conditions of diamond residence as well as preservation potential in the mantle and in the kimberlite magma. This project will study diamond samples from several Canadian and Botswana kimberlite localities with known position within a kimberlite pipe. Surface features on natural diamonds will be compared to the products of diamond dissolution experiments at controlled conditions. The study uses an innovative method of quantitative characterization of diamond dissolution features with an Atomic Force Microscopy. The obtained data will allow us to explore a number of minerals such as chromite, ilmenite, apatite as an indicators of kimberlitic fluid and their potential use in diamond exploration for predicting fluid regime and diamond preservation in kimberlite magma. Combining state-of-the-art scientific imaging and experimental methods with the expertise of DeBeers geologists will provide unique outcomes for the understanding of fundamentals of kimberlite magmatism and refining the exploration methods. The project will examine the nature of mantle metasomatism recorded by the diamond crystals, determine the presence and composition of magmatic fluid during the kimberlite ascent, the effect of this fluid on the features of diamond population, and its role in kimberlite emplacement. Canada has emerged as the third largest diamond producer. The study will provide low cost analytical methods for assessment of diamond preservation during kimberlite emplacement.
大多数宝石钻石是从金伯利岩开采的,金伯利岩是深形成的火山岩,它将钻石从地球地幔的生长区带到地表。即使在邻近的金伯利岩管中,钻石的质量和等级也可能有很大差异。金刚石在地幔中驻留和在金伯利岩浆中上升过程中,会发生部分溶解,并发展出对周围介质条件敏感的再吸收特征。现有的钻石勘探方法使用地幔衍生矿物的化学成分来确认其起源于地幔中含钻石的部分。然而,钻石和其他地幔矿物的表面形态包含大量关于钻石在地幔和金伯利岩浆中的居住条件以及保存潜力的未开发信息。该项目将研究来自加拿大和博茨瓦纳金伯利岩地区的钻石样品,这些金伯利岩在金伯利岩管中的位置已知。天然钻石的表面特征将与在受控条件下进行的钻石溶解实验的产物进行比较。这项研究使用了一种创新的方法,用原子力显微镜定量描述钻石的溶解特征。所获得的数据将使我们能够探索一些矿物,如铬铁矿、钛铁矿、磷灰石,作为金伯利岩流体的指示物,以及它们在钻石勘探中的潜在用途,以预测金伯利岩浆中的流体状态和钻石保存。将最先进的科学成像和实验方法与DeBeers地质学家的专业知识相结合,将为理解金伯利岩岩浆作用的基本原理和完善勘探方法提供独特的结果。该项目将研究钻石晶体记录的地幔交代作用的性质,确定金伯利岩上升过程中岩浆流体的存在和组成,这种流体对钻石群体特征的影响,以及它在金伯利岩侵位中的作用。加拿大已成为全球第三大钻石生产国。这项研究将为评估金伯利岩侵位过程中钻石的保存提供低成本的分析方法。

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)
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Fedortchouk, Yana其他文献

Diamond destruction and growth during mantle metasomatism: An experimental study of diamond resorption features
  • DOI:
    10.1016/j.epsl.2018.11.025
  • 发表时间:
    2019-01-15
  • 期刊:
  • 影响因子:
    5.3
  • 作者:
    Fedortchouk, Yana;Liebske, Christian;McCammon, Catherine
  • 通讯作者:
    McCammon, Catherine
H2O and CO2 in kimberlitic fluid as recorded by diamonds and olivines in several Ekati Diamond Mine kimberlites, Northwest Territories, Canada
  • DOI:
    10.1016/j.epsl.2009.11.049
  • 发表时间:
    2010-01-31
  • 期刊:
  • 影响因子:
    5.3
  • 作者:
    Fedortchouk, Yana;Matveev, Sergei;Carlson, Jon A.
  • 通讯作者:
    Carlson, Jon A.
Mechanisms of diamond oxidation and their hearing on the fluid composition in kimberlite magmas
  • DOI:
    10.2138/am.2007.2416
  • 发表时间:
    2007-07-01
  • 期刊:
  • 影响因子:
    3.1
  • 作者:
    Fedortchouk, Yana;Canil, Dante;Semenets, Elena
  • 通讯作者:
    Semenets, Elena
First crystal-structure determination of olivine in diamond: Composition and implications for provenance in the Earth's mantle
  • DOI:
    10.1016/j.epsl.2011.03.007
  • 发表时间:
    2011-05-01
  • 期刊:
  • 影响因子:
    5.3
  • 作者:
    Nestola, Fabrizio;Nimis, Paolo;Fedortchouk, Yana
  • 通讯作者:
    Fedortchouk, Yana
Three styles of diamond resorption in a single kimberlite: Effects of volcanic degassing and assimilation
  • DOI:
    10.1130/g39066.1
  • 发表时间:
    2017-10-01
  • 期刊:
  • 影响因子:
    5.8
  • 作者:
    Fedortchouk, Yana;Chinn, Ingrid L.;Kopylova, Maya G.
  • 通讯作者:
    Kopylova, Maya G.

Fedortchouk, Yana的其他文献

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{{ truncateString('Fedortchouk, Yana', 18)}}的其他基金

Diamond growth and resorption morphologies reveal the record of mantle fluids and melts
钻石的生长和吸收形态揭示了地幔流体和熔体的记录
  • 批准号:
    RGPIN-2020-06718
  • 财政年份:
    2022
  • 资助金额:
    $ 1.21万
  • 项目类别:
    Discovery Grants Program - Individual
Diamond growth and resorption morphologies reveal the record of mantle fluids and melts
钻石的生长和吸收形态揭示了地幔流体和熔体的记录
  • 批准号:
    RGPIN-2020-06718
  • 财政年份:
    2021
  • 资助金额:
    $ 1.21万
  • 项目类别:
    Discovery Grants Program - Individual
Diamond growth and resorption morphologies reveal the record of mantle fluids and melts
钻石的生长和吸收形态揭示了地幔流体和熔体的记录
  • 批准号:
    RGPIN-2020-06718
  • 财政年份:
    2020
  • 资助金额:
    $ 1.21万
  • 项目类别:
    Discovery Grants Program - Individual
Mantle metasomatism and kimberlite emplacement recorded in the dissolution and reaction products on diamond and other mantle minerals
金刚石和其他地幔矿物的溶解和反应产物记录的地幔交代作用和金伯利岩侵位
  • 批准号:
    RGPIN-2015-04650
  • 财政年份:
    2019
  • 资助金额:
    $ 1.21万
  • 项目类别:
    Discovery Grants Program - Individual
Mantle metasomatism and kimberlite emplacement recorded in the dissolution and reaction products on diamond and other mantle minerals
金刚石和其他地幔矿物的溶解和反应产物记录的地幔交代作用和金伯利岩侵位
  • 批准号:
    RGPIN-2015-04650
  • 财政年份:
    2018
  • 资助金额:
    $ 1.21万
  • 项目类别:
    Discovery Grants Program - Individual
Mantle metasomatism and kimberlite emplacement recorded in the dissolution and reaction products on diamond and other mantle minerals
金刚石和其他地幔矿物的溶解和反应产物记录的地幔交代作用和金伯利岩侵位
  • 批准号:
    RGPIN-2015-04650
  • 财政年份:
    2017
  • 资助金额:
    $ 1.21万
  • 项目类别:
    Discovery Grants Program - Individual
Mantle metasomatism and kimberlite emplacement recorded in the dissolution and reaction products on diamond and other mantle minerals
金刚石和其他地幔矿物的溶解和反应产物记录的地幔交代作用和金伯利岩侵位
  • 批准号:
    RGPIN-2015-04650
  • 财政年份:
    2016
  • 资助金额:
    $ 1.21万
  • 项目类别:
    Discovery Grants Program - Individual
Mantle metasomatism and kimberlite emplacement recorded in the dissolution and reaction products on diamond and other mantle minerals
金刚石和其他地幔矿物的溶解和反应产物记录的地幔交代作用和金伯利岩侵位
  • 批准号:
    RGPIN-2015-04650
  • 财政年份:
    2015
  • 资助金额:
    $ 1.21万
  • 项目类别:
    Discovery Grants Program - Individual
The nature of kimberlitic and mantle fluid and diamond preservation
金伯利岩和地幔流体的性质与钻石保存
  • 批准号:
    341701-2007
  • 财政年份:
    2012
  • 资助金额:
    $ 1.21万
  • 项目类别:
    Discovery Grants Program - Individual
Diamond resorption in kimberlite and mantle
金伯利岩和地幔中的金刚石吸收
  • 批准号:
    437694-2012
  • 财政年份:
    2012
  • 资助金额:
    $ 1.21万
  • 项目类别:
    Engage Grants Program

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