Biotite Equilibria in High Silica Rhyolites: Controls on Volatile Fugacities and Abundance in Bishop and Toba Tuff Magmas
高硅流纹岩中的黑云母平衡:主教和多巴凝灰岩岩浆中挥发性逸度和丰度的控制
基本信息
- 批准号:9526527
- 负责人:
- 金额:$ 10.95万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:1996
- 资助国家:美国
- 起止时间:1996-06-15 至 1998-11-30
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
9526527 Rutherford The proposed research is to determine the phase equilibria for high silica rhyolite beginning with the controls on biotite composition and biotite stability. The biotite-alkali feldspar-magnetite equilibrium is potentially a powerful tool for determining the pre-eruptive water fugacities, but has been of limited use because of the poor constraints on the ferric and ferrous iron composition of biotite as a function of pressure, temperature, and fluid composition. Two sets of experiments will be performed: (1) annealing biotite with alkali feldspar and titaniferous magnetite, and (2) hydrothermal experiments on samples from the Bishop and Toba Tuffs, all in the presence of mixed fluids (H2O, CO2 , F) of controlled composition. The ferrous/ferric composition of biotite will be determined by microtitration and micro x-ray photoelectron spectroscopy. The O, H and F contents will be determined by ion probe and electron microprobe. This research will constrain the stability and composition of biotite in high silica rhyolite, calibrate the biotite-magnetite-alkali feldspar equilibrium, and apply these results to determine the pre-eruptive conditions of the Bishop and Toba magmas.
9526527 Rutherford建议的研究是从控制黑云母成分和黑云母稳定性开始,确定高硅流纹岩的相平衡。黑云母-碱性辉长岩-磁铁矿平衡可能是确定喷发前水逸度的有力工具,但由于黑云母的三价铁和二价铁组合物受压力、温度和流体组合物的影响而受到限制,因此使用有限。将进行两组实验:(1)用碱性长石和含钛磁铁矿对黑云母进行退火,(2)对来自Bishop凝灰岩和Toba凝灰岩的样品进行热液实验,所有实验都是在控制成分的混合流体(H2O、CO2、F)存在下进行的。黑云母的亚铁/三价铁组成将通过微量滴定和微量X射线光电子能谱法测定。用离子探针和电子探针测定O、H、F含量。本研究将限制高硅流纹岩中黑云母的稳定性和成分,标定黑云母-磁铁矿-碱性长石平衡,并将这些结果应用于确定Bishop和Toba岩浆的喷发前条件。
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)
专利数量(0)
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Malcolm Rutherford其他文献
Malcolm Rutherford的其他文献
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{{ truncateString('Malcolm Rutherford', 18)}}的其他基金
Volcanic Processes in Volatile-Rich Magmas: High Pressure Experiments on Amphibole-Plagiclase-Melt Equilibria and C-O-S-Cl-H
富含挥发分的岩浆中的火山过程:角闪石-斜长石-熔融平衡和 C-O-S-Cl-H 的高压实验
- 批准号:
0609868 - 财政年份:2006
- 资助金额:
$ 10.95万 - 项目类别:
Continuing Grant
Volcanic Processes in Volatile-Rich Magmas: Constraints From Phase Equilibria and the Role of the Fluid Phase
富含挥发分的岩浆中的火山过程:相平衡的约束和流体相的作用
- 批准号:
0309870 - 财政年份:2003
- 资助金额:
$ 10.95万 - 项目类别:
Continuing Grant
Acquisition of a new Electron Microprobe
获得新的电子显微探针
- 批准号:
0111183 - 财政年份:2001
- 资助金额:
$ 10.95万 - 项目类别:
Standard Grant
Volcanic Processes in Subduction Zone Magmas: Composition, Abundance, and Role of C-O-H-S Volatiles
俯冲带岩浆中的火山过程:C-O-H-S 挥发物的组成、丰度和作用
- 批准号:
0073771 - 财政年份:2000
- 资助金额:
$ 10.95万 - 项目类别:
Standard Grant
C-O-H-S Fluids in Volatile-Rich Magmas: Controls, Compositions, and Role in Volcanic Processes
富含挥发性岩浆中的 C-O-H-S 流体:控制、成分以及在火山过程中的作用
- 批准号:
9706251 - 财政年份:1997
- 资助金额:
$ 10.95万 - 项目类别:
Continuing Grant
Electron Microprobe Upgrade, Brown University
电子显微探针升级,布朗大学
- 批准号:
9417917 - 财政年份:1995
- 资助金额:
$ 10.95万 - 项目类别:
Standard Grant
Experimental Investigation of Phase Equilibria in Calc-Alkaline Magmas with C-O-H-S Fluids
C-O-H-S流体钙碱性岩浆相平衡的实验研究
- 批准号:
9418157 - 财政年份:1995
- 资助金额:
$ 10.95万 - 项目类别:
Standard Grant
Calc-Alkaline Magma Ascent Rates: An Experimental Investigation
钙碱性岩浆上升速率:实验研究
- 批准号:
9218816 - 财政年份:1993
- 资助金额:
$ 10.95万 - 项目类别:
Standard Grant
Experimental Investigation of Phase Equilibria in Calc-Alkaline Magmas with C-O-H Fluids
钙碱性岩浆中C-O-H流体相平衡的实验研究
- 批准号:
9105110 - 财政年份:1991
- 资助金额:
$ 10.95万 - 项目类别:
Continuing Grant
Calc-Alkaline Magma Ascent Rates: An Experimental Investigation
钙碱性岩浆上升速率:实验研究
- 批准号:
9004842 - 财政年份:1990
- 资助金额:
$ 10.95万 - 项目类别:
Standard Grant
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