西昆仑南带斜长角闪岩中方柱石的形成与流体挥发分的作用

对西昆仑南带变基性岩矿物组合及矿物成分变化的研究结果表明，挥发分的种类和含量直接影响到变基性岩矿物组合和矿物成分，如角闪石、黑云母、方柱石、磷灰石和榍石；方柱石并非如有人总结的那洋没有出溶现象，实际上其自身亦可沿{100}析离出黄铁矿晶体，所含硫的赋存状态很可能是S^2-，而不是SO4^2-；方柱石是早期（高温）变质过程中部分挥发分（如Cl、CO3^2-、S^2-）的存储器，晚期剪切变形降温和/或降压时挥发分释出，伴随的流体作用可形成金属硫化物，并可能导致矿化。

The role of volatiles in the formation of scapolite in amphibolites of southern West Kunlun Mountains

According to the observation of mineral compositions and assemblages of the amphibolites along the China-Pakistan highway profile in southern West Kunlun Mountains, it is held that the components of the volatiles directly affect the assemblages and compositions of amphibole, biotite, scapolite and titanite. Someone once believed that scapolite did not experience exolution, but this opinion seems not to stand. Pyrite rods are actually exsolved parallel to the {100} crystal faces, henceforth the state of sulfur in scapolite is most likely S 2- , not SO 4 2- . Scapolite is the reservoir of such volatiles as Cl, CO 3 2- and S 2- in the early metamorphic process. In the late shear deformation period, cooling and/or decompression result in the release of the volatiles, and the associated hydrothermal process might form metal sulfides and even lead to mineralization.