| 岩浆作用的物理过程研究进展 |
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| 引用本文： | 赖绍聪.岩浆作用的物理过程研究进展[J].地球科学进展,1999,14(2):153-158. |
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| 作者姓名： | 赖绍聪 |
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| 作者单位： | 西北大学地质系,陕西,西安,710069 |
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| 基金项目： | 陕西省教委专项科研基金,西北大学科研基金 |
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| 摘 要： | 概略地介绍了８０年代以来硅酸盐熔体及硅酸盐晶－液悬浮体的密度、粘度、熔体结构、流全动力学等方面的研究动向，及其对岩浆作用、岩浆运移、岩浆侵位机制的动力学约束条件，硅酸盐熔体的结构是制约熔粘度的主导因素，化学成分对熔体匠控制是通过改变熔体结构而实现的，粘度在一定程度上决定着岩浆的迁移、侵痊和喷发方式。密度和浮力是岩浆上升侵位的重要约束，地壳是岩交涉升的一个密度过滤器岩浆最终由于浮和的消失而停止上升。
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| 关 键 词： | 密度 粘度 熔体结构 流体动力学 岩浆作用 |
| 文章编号： | 1001-8166(1999)02-0153-06 |
ADVANCES IN THE PHYSICS PROCESS RESEARCH ON MAGMATISM |
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| LAI Shaocong.ADVANCES IN THE PHYSICS PROCESS RESEARCH ON MAGMATISM[J].Advance in Earth Sciences,1999,14(2):153-158. |
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| Authors: | LAI Shaocong |
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| Institution: | Northwest University,Xi an 710069,China |
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| Abstract: | The newdevelopment and progress in density,viscosity,melt structure and fluid dynamics of the magmatic silicate melt-silicate crystal/liquid suspension are briefly summarized in this paper.Then the relationship and constrainting conditions between physical features ofthe magma andmagmatism,magma transport aswell asmagma emplacementmechanism are discussed in this paper.It is believed thatthe viscosityof silicate melt dependenton the characters of its chemical composition,however,the change of melt structure is the reason for the change of viscosity. The relationship between viscosity and chemical composition,actually,is the reflection of the relationship between viscosity and melt structure.In some degree the transport,emplacement and eruption pattern ofthe magmas are determined byviscosityofthe melt.In addition,the density and buoyancy are important constrainting conditions formagma ascending and emplacement.In fact,the earth s crust is a density filter for magma rising.Finally the magmas stop ascendingwhen the buoyancy disappears. |
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| Keywords: | Density Viscosity Silicate melt structure Fluid dynamics Magmatism |
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