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首页> 外文学位 >Modeling Fluid-Rock Interaction, Melt-Rock Interaction, and Silicate Melt Properties at Crustal to Planetary Interior Conditions.
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Modeling Fluid-Rock Interaction, Melt-Rock Interaction, and Silicate Melt Properties at Crustal to Planetary Interior Conditions.

机译：在地壳到行星内部条件下对流体-岩石相互作用，熔体-岩石相互作用和硅酸盐熔体性质进行建模。

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摘要

Investigation of the differentiation of mantle lithosphere and asthenosphere and growth of continental and oceanic crust requires a thorough understanding of mineral, melt and fluid phase relationships and physical properties from ambient to high-pressure-temperature conditions, often beyond experimental capability. Beyond what we can learn directly from seismological techniques or from deep materials transported to the Earth's surface, we rely heavily on a combination of theory-based extrapolation of material properties and computational simulation of geomaterial properties at deep Earth conditions. To help achieve these ends, my research has dealt with the thermodynamics and transport properties of some high-PT geosilicate systems. In particular, (1) a new thermodynamic model has been developed for mineral solubility in aqueous (H2O-rich) fluids at pressures up to 5 GPa (e.g. mantle metasomatism and partial melting in subduction zones) based on Generalized Born theory using a simple model that relates mineral solubility to the dielectric constant of supercritical H2O, (2) results for the Equation of State, structure and transport properties from 0--30 GPa and 2000--5500 K for liquid CaMgSi2O6, an important component of the mantle based on Molecular Dynamics simulations are presented, (3) phase-equilibria based simulation results representing the behavior of a set mafic magma types in response to contamination by mafic to silicic and pelitic country rock via Energy-Constrained Assimilation-Fractional Crystallization (EC-AFC) processes, and (4) Ten new 40Ar/39Ar eruption ages for the western Aeolian Islands, southern Italy are presented and utilized to constrain the late Quaternary insular uplift history, demonstrating that all seven islands in this archipelago except Alicudi have experienced a similar uplift rate since c. 125 ka during periods of volcanic quiescence, while uplift/subsidence rates vary dramatically during periods of volcanic activity on the islands of Alicudi and Filicudi.
机译：要研究地幔岩石圈和软流圈的分化以及大陆和海洋壳的生长，就需要全面了解矿物，熔体和流体的关系以及从环境到高压温度条件下的物理性质，这通常超出了实验能力。除了我们可以直接从地震技术或从运输到地球表面的深层材料中学到的知识之外，我们还严重依赖于基于理论的材料属性外推法和深地球条件下的地球材料属性的计算模拟的结合。为了帮助实现这些目标，我的研究涉及一些高PT地硅酸盐系统的热力学和输运性质。特别是，（1）基于广义博恩理论，使用简单模型，开发了一种新的热力学模型，用于在高达5 GPa的压力下（例如，地幔交代作用和俯冲带中的部分熔融）在含水（富含H2O）的流体中矿物溶解度将矿物溶解度与超临界H2O的介电常数相关联，（2）对于液态CaMgSi2O6（其基于地幔的重要组成部分）在0--30 GPa和2000--5500 K范围内的状态，结构和传输性质方程的结果提出了分子动力学模拟，（3）基于相平衡的模拟结果，代表一组铁镁质岩浆类型通过能量约束的同化-片段化结晶（EC-AFC）过程响应于铁镁质对硅质和胶粒性乡村岩石的污染的行为（4）提出了意大利南部西部风沙群岛的10个新的40Ar / 39Ar喷发年龄，并用于限制第四纪晚期岛状隆升的历史，自从c。开始，该群岛中除阿利库迪外的所有七个岛屿都经历了类似的上升速度。在火山静止期为125 ka，而在阿利库迪岛和菲利库迪岛上的火山活动期间，隆升/沉降速率变化很大。

著录项

  • 作者

    Creamer, Jeffrey Baur.;

  • 作者单位

    University of California, Santa Barbara.;

  • 授予单位 University of California, Santa Barbara.;
  • 学科 Geology.;Petrology.
  • 学位 Ph.D.
  • 年度 2012
  • 页码 117 p.
  • 总页数 117
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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