Mechanisms of alteration of basaltic and rhyolitic glasses considering solution chemistry and passivating properties of palagonite - a case study on ICDP drilling sites Hawaii and Snake River Plain

考虑溶液化学和八角长石钝化特性的玄武岩和流纹岩玻璃的蚀变机制 - 以夏威夷和斯内克河平原 ICDP 钻探地点为例

基本信息

  • 批准号:
    215411906
  • 负责人:
  • 金额:
    --
  • 依托单位:
  • 依托单位国家:
    德国
  • 项目类别:
    Infrastructure Priority Programmes
  • 财政年份:
    2012
  • 资助国家:
    德国
  • 起止时间:
    2011-12-31 至 2014-12-31
  • 项目状态:
    已结题

项目摘要

Alteration layers on basaltic and rhyolitic glasses are common in volcanic rocks. Such layers denoted as palagonite have strong influence on transformation of glasses to crystalline phases and reactions of glasses with other rock components or fluids, the latter being of great importance for element release. In particular palagonite may act as diffusion barrier that slows down or even inhibit glass alteration. The effect of such a barrier may change over time due to polymerization and precipitation reactions which affect porosity and permeability. Microorganisms forming pits and tubes in basaltic glass surfaces may provide routes in palagonite which enhance abiotic glass alteration too. Findings on porosity and nonequilibrium textures in alteration layers, and a new model on an interface-coupled dissolution reprecipitation mechanism encouraged us to use altered glass samples in combination with experimental work to determine the relationship between glass alteration and palagonite properties, in particular effects of porosity of layers and solution chemistry on glass weathering rate. Chemically different basaltic and rhyolitic glasses available from ICDP drilling cores Hawaii and Snake River Plain exposed to saline and different fresh waters at temperatures allowing microbial colonization will be included. Our planned research involves (i) a petrographical investigation of glass alteration with focus on texture, (ii) the characterization of pore systems using N2-adsorption, Hg-porosimetry, impregnation with a molten alloy and various microscopic techniques, (iii) an experimental study of transport in pore spaces, (iv) determination of ionic effects on glass dissolution traced by zeta-potential and element release rates considering biochemical factors, and (v) fluid-glass experiments at conditions relevant to the drilling sites. Knowledge of these interactions is needed to understand and predict interdependencies of palagonite formation, glass alteration rates, solution composition and biochemical factors.
玄武岩和流纹岩玻璃上的蚀变层在火山岩中很常见。这些层被称为palagonite,对玻璃向结晶相的转变以及玻璃与其他岩石成分或流体的反应有很强的影响,后者对元素释放具有重要意义。特别是palagonite可以作为扩散屏障,减缓甚至抑制玻璃化。由于聚合和沉淀反应会影响孔隙度和渗透率,这种屏障的作用可能会随着时间的推移而改变。在玄武岩玻璃表面形成凹坑和管状的微生物也可能为palagonite提供通道,从而增强非生物玻璃蚀变。关于蚀变层孔隙度和非平衡结构的发现,以及界面耦合溶解再沉淀机制的新模型,鼓励我们利用蚀变玻璃样品结合实验工作来确定玻璃蚀变与palagonite性质之间的关系,特别是层孔隙度和溶液化学对玻璃风化速率的影响。夏威夷和斯内克河平原暴露在盐水和不同的淡水中,温度允许微生物定植,从ICDP钻井岩心中获得化学上不同的玄武岩和流纹岩玻璃将包括在内。我们计划的研究包括:(i)以结构为重点的玻璃蚀变岩相学研究;(ii)利用氮气吸附、汞孔隙法、熔融合金浸渍和各种显微技术表征孔隙系统;(iii)孔空间运输的实验研究;(iv)考虑生化因素,通过ζ电位和元素释放率来确定离子对玻璃溶解的影响。(五)在与钻井现场相关的条件下进行流体玻璃实验。需要了解这些相互作用,以了解和预测palagonite形成,玻璃蚀变率,溶液组成和生化因素的相互依赖性。

项目成果

期刊论文数量(2)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Electrolyte effects on surface chemistry of basaltic glass in the initial stages of dissolution
溶解初期电解质对玄武岩玻璃表面化学的影响
  • DOI:
    10.1016/j.chemgeo.2016.01.027
  • 发表时间:
    2016
  • 期刊:
  • 影响因子:
    3.9
  • 作者:
    Behrens;Helsch;Deubener
  • 通讯作者:
    Deubener
Alteration of a Submarine Basaltic Glass under Environmental Conditions Conducive for Microorganisms: Growth Patterns of the Microbial Community and Mechanism of Palagonite Formation
有利于微生物生长的环境条件下海底玄武岩玻璃的变化:微生物群落的生长模式和八角长石形成机制
  • DOI:
    10.1080/01490451.2014.897774
  • 发表时间:
    2014
  • 期刊:
  • 影响因子:
    2.3
  • 作者:
    Dupont;Halisch;Behrens;Welsch;Erdmann;Helsch;Deubener
  • 通讯作者:
    Deubener
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Professor Dr. Harald Behrens其他文献

Professor Dr. Harald Behrens的其他文献

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{{ truncateString('Professor Dr. Harald Behrens', 18)}}的其他基金

New insights into the interplay between water diffusion and viscosity in magma fragmentation
关于岩浆破碎中水扩散和粘度之间相互作用的新见解
  • 批准号:
    428916619
  • 财政年份:
    2019
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Effects of cutting edge residual stresses on the wear behavior of PVD-coated cutting tools
切削刃残余应力对PVD涂层刀具磨损行为的影响
  • 批准号:
    389013280
  • 财政年份:
    2018
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Chlorine in amphibole: intracrystalline diffusion and partitioning between amphibole and silicate melt
角闪石中的氯:角闪石和硅酸盐熔体之间的晶内扩散和分配
  • 批准号:
    298850205
  • 财政年份:
    2016
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Supply of soluble Fe to ocean surface waters - quantitative approaches from ICDP site Hawaii by determining interface driven Fe transfer from subsurface volcanic rocks
向海洋表层水供应可溶性铁 - 来自夏威夷 ICDP 地点的定量方法,通过确定界面驱动的地下火山岩铁转移
  • 批准号:
    290773199
  • 财政年份:
    2016
  • 资助金额:
    --
  • 项目类别:
    Infrastructure Priority Programmes
In situ determination of sulfur speciation in fluids at high temperature and pressure at controlled redox conditions: implications for magma degassing and formation of magmatic ore deposits
在受控氧化还原条件下原位测定高温高压流体中的硫形态:对岩浆脱气和岩浆矿床形成的影响
  • 批准号:
    249781619
  • 财政年份:
    2013
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Impact of structure and relaxation on fatigue and micromechanical properties of oxide glasses - the role of volatiles and bonding state
结构和松弛对氧化物玻璃疲劳和微机械性能的影响——挥发物和键合状态的作用
  • 批准号:
    224489083
  • 财政年份:
    2012
  • 资助金额:
    --
  • 项目类别:
    Priority Programmes
Effect of pressure on transport properties of granular lithium ion conductors
压力对粒状锂离子导体输运性能的影响
  • 批准号:
    166931436
  • 财政年份:
    2010
  • 资助金额:
    --
  • 项目类别:
    Research Units
Kinetics of Li intercalation and de-intercalation in tantalum chalcogenide single crystals
钽硫族化物单晶中锂嵌入和脱嵌动力学
  • 批准号:
    167039484
  • 财政年份:
    2010
  • 资助金额:
    --
  • 项目类别:
    Research Units
Pre-eruptive conditions of the Campanian Ignimbrite eruption: Experimental constraints from phase equilibria and volatile solubility studies and its implication for the Campi Flegrei drilling project
Campanian Ignimbrite 喷发前的条件:相平衡和挥发性溶解度研究的实验限制及其对 Campi Flegrei 钻探项目的影响
  • 批准号:
    166944350
  • 财政年份:
    2010
  • 资助金额:
    --
  • 项目类别:
    Infrastructure Priority Programmes
Partitioning of sulfur and sulfur isotopes between fluids and melts - a key for understanding and monitoring of magmatic degassing
硫和硫同位素在流体和熔体之间的分配——理解和监测岩浆脱气的关键
  • 批准号:
    164914959
  • 财政年份:
    2010
  • 资助金额:
    --
  • 项目类别:
    Research Grants

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