Sulphides - Economically important geochemical messengers from the mantle
硫化物 - 来自地幔的具有重要经济意义的地球化学信使
基本信息
- 批准号:NE/L010828/1
- 负责人:
- 金额:$ 71.58万
- 依托单位:
- 依托单位国家:英国
- 项目类别:Fellowship
- 财政年份:2015
- 资助国家:英国
- 起止时间:2015 至 无数据
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
My project is aimed at understanding how a number of economically and geologically important chemical elements partition themselves between the silicates of the outer parts of the Earth and sulphides, minerals and liquids rich in sulphur. Although sulphur is not very abundant in the Earth, it has a powerful impact on the behaviour of a wide range of elements in Earth's crust and underlying mantle. For example, the majority of ore bodies rich in nickel, copper, gold and platinum are sulphides. Many of them are formed when sulphides separate from molten silicates in volcanic areas. A principal aim of my project is to experimentally reproduce the conditions under which sulphides separate and to determine how they extract the economically important elements from the host volcanic rocks. A second aim is to use my experimental results to determine whether or not a large mass of sulphide was extracted from the molten earth early in its history (4500 million years ago) and dissolved into the metallic core. In order to study how elements are distributed into sulphide I perform experiments at high pressures and temperatures, typically 15000 atmospheres pressure and 1400 degrees C in a large hydraulic press. After treatment at high pressure and temperature, the samples (typically about 1x1x1 millimeters) are rapidly cooled to room temperature and pressure and examined using a range of microanalytical techniques. The latter enables me to resolve chemical composition on the scale of 10 microns (or 10 millionth's of a meter).
我的项目旨在了解一些具有经济和地质重要性的化学元素如何在地球外部的硅酸盐与硫化物、矿物和富含硫的液体之间进行分配。虽然硫在地球中并不十分丰富,但它对地壳和地幔中各种元素的行为具有强大的影响。例如,大多数富含镍、铜、金和铂的矿体是硫化物。其中许多是在火山地区硫化物与熔融硅酸盐分离时形成的。我的项目的一个主要目的是通过实验重现硫化物分离的条件,并确定它们如何从寄主火山岩中提取具有重要经济意义的元素。第二个目标是利用我的实验结果来确定是否有大量的硫化物在其历史早期(45亿年前)从熔融的地球中提取出来并溶解到金属核心中。为了研究元素如何分布到硫化物中,我在高压和高温下进行实验,通常在大型液压机中进行15000个大气压和1400摄氏度的实验。在高压和高温下处理后,将样品(通常约1x1x1毫米)快速冷却至室温和压力,并使用一系列微量分析技术进行检查。后者使我能够在10微米(或1000万分之一米)的尺度上解析化学成分。
项目成果
期刊论文数量(10)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Oxidized iron in garnets from the mantle transition zone
- DOI:10.1038/s41561-017-0055-7
- 发表时间:2018-01
- 期刊:
- 影响因子:18.3
- 作者:E. Kiseeva;D. Vasiukov;B. Wood;C. McCammon;T. Stachel;M. Bykov;E. Bykova;A. Chumakov;V. Cerantola;J. Harris;L. Dubrovinsky
- 通讯作者:E. Kiseeva;D. Vasiukov;B. Wood;C. McCammon;T. Stachel;M. Bykov;E. Bykova;A. Chumakov;V. Cerantola;J. Harris;L. Dubrovinsky
The influence of crustal recycling on the molybdenum isotope composition of the Earth's mantle
- DOI:10.1016/j.epsl.2022.117760
- 发表时间:2022-10
- 期刊:
- 影响因子:5.3
- 作者:R. Hin;K. Hibbert;Shuo Chen;M. Willbold;M. B. Andersen;E. Kiseeva;B. Wood;Y. Niu;K. Sims
- 通讯作者:R. Hin;K. Hibbert;Shuo Chen;M. Willbold;M. B. Andersen;E. Kiseeva;B. Wood;Y. Niu;K. Sims
Women at the dawn of diamond discovery in Siberia or how two women discovered the Siberian diamond province
西伯利亚钻石发现之初的女性或两名女性如何发现西伯利亚钻石省
- DOI:10.1144/sp506-2020-11
- 发表时间:2020
- 期刊:
- 影响因子:0
- 作者:Kiseeva E
- 通讯作者:Kiseeva E
Elastic properties of majoritic garnet inclusions in diamonds and the seismic signature of pyroxenites in the Earth's upper mantle
钻石中主要石榴石包裹体的弹性特性和地球上地幔中辉石岩的地震特征
- DOI:10.2138/am-2020-7136ccby
- 发表时间:2020
- 期刊:
- 影响因子:3.1
- 作者:Dubrovinsky L
- 通讯作者:Dubrovinsky L
In situ low-degree melts in peridotite xenolith from Majuagaa kimberlite, West Greenland
西格陵兰 Majuagaa 金伯利岩橄榄岩捕虏体中的原位低度熔融
- DOI:10.5194/egusphere-egu22-1932
- 发表时间:2022
- 期刊:
- 影响因子:0
- 作者:Kiseeva E
- 通讯作者:Kiseeva E
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