Experimental Examination, In-Situ, of H2O-Bearing Magmatic Systems at Pressure and Temperature Conditions of the Earth's Crust and Upper Mantle

小行星9614423 拟议研究的主要目标是在高温高压（地壳和上地幔条件）下就地调查含水硅酸盐熔体和相关热液流体的化学结构随温度、成分和压力的变化。 该试点项目将侧重于对水饱和的硅酸钾熔体和共存的含水流体进行系统研究。该项目将涉及补充研究，包括（1）熔体和水相的原位拉曼光谱测量，以及（2）相平衡实验和必要的分析检查，以确定两相的确切组成。 光谱研究将使用外部加热的金刚石压砧室进行，该压砧室能够在1000 ℃的温度和超过2.5 Gpa的压力下使用。

9614423 Mysen The principal objective of the proposed research is to investigate in-situ at high temperature and pressure (crustal and upper mantle conditions) the chemical structure of hydrous silicate melts and associated hydrothermal fluids as a function of temperature, composition, and pressure. This pilot project will focus on a systematic study of water-saturated potassium silicate melts and coexisting aqueous fluids. The project will involve complementary studies including (1) in-situ Raman spectroscopic measurements of both the melt and aqueous phase, and (2) phase equilibrium experiments and necessary analytical examination to determine the exact compositions of the two phases. Spectroscopic studies will be performed using externally- heated diamond-anvil cells which are capable of being used to temperatures of 1000oC and pressures in excess of 2.5 Gpa.