Stable Isotope Geochemistry

这项建议将继续几条研究路线，其中 该实验室目前正在开展以下活动： (1)原始和分异岩石中的氧和硅同位素 陨石来研究星云和行星的形成过程。 (2)氧同位素平衡的实验测定 使用新的硅酸盐-碳酸盐交换技术的常数。 (3)氧同位素测温的系统再评价 火成岩和变质岩，使用新的分馏因子。 (4)大气中异常同位素交换的实验研究 O3的反应，使用广泛的同位素组成， 氧气 (5)地球大气中氧的理论和实验研究 高层大气 (6)麻粒岩和榴辉岩的氧同位素研究。 过去三年的成果令人满意。 是 计划继续研究其中一些最有价值的项目， 并开辟了一些新的研究方向，如上述（4）。

This proposal will continue several lines of research in which the laboratory is currently active, as follows: (1) Oxygen and silicon isotopes in primitive and differentiated meteorites to study nebular and planetary processes. (2) Experimental determination of oxygen isotope equilibrium constants using novel silicate-carbonate exchange techniques. (3) Systematic re-evaluation of oxygen isotope thermometry of igneous and metamorphic rocks, using new fractionation factors. (4) Laboratory studies of anomalous isotope exchange in the reaction of O3, using a wide range of isotopic compositions of oxygen. (5) Theoretical and experimental study of oxygen in the Earth's upper atmosphere. (6) Oxygen isotope studies of granulites and eclogites. Results over the past three years have been gratifying. It is planned to continue work on some of the most rewarding of these, as well as open some new lines of research, such as (4) above.