科技创新与应用2025，Vol.15Issue(31)：61-64,4.DOI:10.19981/j.CN23-1581/G3.2025.31.014
高温高压下含水玄武岩熔体的波速理论研究
摘要
Abstract
Compared to minerals,acoustic wave propagation in basalt melts is affected by loose structure and intermolecular distance,and its wave velocity is usually low,especially at high pressures.Studying its wave velocity characteristics is of great significance for understanding the structure of the crust and upper mantle.In this study,by integrating Brillouin spectral analysis technology and diamond anvil device,a comprehensive study was carried out on the elastic wave velocity characteristics,mechanical response laws and density distribution evolution models of basalt melted systems under extreme temperature and pressure conditions.Using high-temperature and high-pressure in-situ testing methods,quantitative analysis of melt elastic parameters,mechanical behavior characteristics and material state changes was realized.The experimental results show that the second-order phase transformation occurs in the basalt melt at about 10 GPa,and the phase transformation pressure point is slightly advanced with the increase of temperature.The elastic modulus changes significantly at the phase transition point,while the density increases monotonically with pressure without sudden change.The research results reveal the structural phase transition mechanism of basalt melts under high temperature and high pressure.This study helps explain the formation mechanism of the low-velocity layer of seismic waves inside the earth,and then reveals the physical state and dynamic processes inside the earth.关键词
玄武岩熔体/高温高压/波速/P波/S波/地球深部/地震波Key words
basalt melt/high temperature and high pressure/wave velocity/P wave/S wave/deep earth/seismic wave引用本文复制引用
何宗润,吴雷..高温高压下含水玄武岩熔体的波速理论研究[J].科技创新与应用,2025,15(31):61-64,4.基金项目
贵州民族大学校基金(2018)(5573-YB11) （2018）
