The Transport Properties of Volatile-Bearing Magmatic Melts

本项目包括测量含氢岩浆液体在400 ~ 1300℃、1 bar ~ 2000 MPa范围内的密度、热膨胀率和可压缩性的实验。将采取两种方法：(1)含水液体在玻璃化转变温度下的低温密度测量，以及(2)在50-200 MPa的快淬冷密封压力装置和600-2000 MPa的活塞缸装置中下沉和漂浮超纯结晶石墨和商业碳涂层石英，钠长石和钙长石浮力标记。研究结果将应用于岩浆爆发过程中熔体分离和源区迁移问题以及熔体脱气和碎裂动力学问题。

9706075 Lange This project involves experiments to measure the density, thermal expansivity and compressibility of H2O-bearing magmatic liquids between 400 and 1300oC and from 1 bar to 2000 MPa. Two approaches will be taken: (1) low temperature density measurements of hydrous liquids at their glass transition temperatures, and (2) the sinking and floating of ultra-pure crystalline graphite and commercially carbon-coated quartz, albite, and anorthite buoyancy markers in a rapid-quench cold-seal pressure apparatus between 50-200 MPa and a piston cylinder apparatus between 600-2000 MPa. The results will have application to problems of melt segregation and migration from source regions and the dynamics of melt degassing and fragmentation during explosive magmatic eruptions.