Experiments on element partitioning between rocks, minerals or magmas and hydrothermal solutions under supercritical conditions.

岩石、矿物、岩浆和热液溶液之间的元素分布信息对于了解成矿和热液蚀变过程是必不可少的。为了弄清控制元素分布的因素，对闪锌矿、石榴石、尖晶石、磁铁矿、钙辉石、透闪石、云母、滑石和绿泥石进行了二价金属离子在矿物和氯水溶液中的同时分配实验。实验采用标准冷密封压力容器，温度为500 ~ 800℃，温度为1kb。结果表明，元素分布一般受离子半径控制，但Ni、Zn和Co在分配上存在异常。此外，还进行了岩石与氯水溶液之间元素分配的实验。对JG-1a花岗闪长岩在500 ~ 800℃，1kb的温度范围内进行了温度依赖性实验。此外，还对JB-1a玄武岩在0。3到7。5 kb、600℃。在0.3 ~ 2kb压力工况下采用冷密封型压力容器，在5 ~ 7压力工况下采用活塞缸型压力容器。5 kb。实验结果表明，在高温低压条件下，过渡元素优先分配到水热溶液中。这一事实表明，岩浆在浅层条件下凝固时，会排出具有高矿化度的热液。

Information on the element distribution between rocks, minerals and magmas, and hydrothermal solutions is indispensable in understanding of ore-forming and hydrothermal alteration processes. In order to clarify factors controlling element distribution, experiments on simultaneous partitioning of divalent metal ions between minerals and aqueous chloride solutions were carried out for sphalerite, garnet, spinel, magnetite, hedenbergite, tremolite, phlogopite, talc and chlorite. The experiments were performed under 500 to 800℃, lkb, using a standard cold-seal type pressure vessel. As a result, it was clarified that the element distribution is generally controlled by the ion radius, but that Ni, Zn and Co show anomaly in partitioning.In addition, experiments on element partitioning between rocks and aqueous chloride solutions were carried out. Experiments on temperature dependence was conducted for the granodiorite JG-1a in the temperature range of 500 to 800℃, 1kb. Moreover, experiments on pressure dependence was performed for the basalt JB-1a in the pressure range of 0. 3 to 7. 5kb, 600℃. A cold-seal type pressure vessel was used for the experiments in the pressure condition between 0.3 to 2kb, and a piston cylinder type pressure vessel for those in the pressure conditions of 5 and 7. 5kb. These experiments revealed that transition elements were preferentially partitioned into hydrothermal solutions under, higher temperature and lower pressure conditions. This fact suggests that hydrothermal solutions with high potential mineralization will be discharged from magma when it solidifies in shallow conditions.