摘要
新疆哈密黄山南含矿镁铁-超镁铁杂岩体侵位于下石炭统干洞组片岩中,岩体可划分为两个侵入期四个岩相。其原始岩浆具富镁贫钙、碱质钛略偏低特征,属拉斑玄武岩系列,是上地幔经部分熔融的产物。岩体成岩温度为1900～750℃,压力为223.8～285.4MPa,氧逸度为10^(-13)～10^(-14)。
Huangshannan ore-bearing mafic-ultramafic complex thermally emplaced into the schists of Gandong Formation, Lower Carboniferous. The complex may be divided into two periods and four petrographical facies. The parental magma should belong to tholeiite basaltic series with rich-Mg, poor-Ca and low-alkali-Ti. It was formed by partial melting in the upper mantle.The diagensis temperature, pressure and the oxygen fugacity of the complex are about 1900～750℃, 2.238×l8~8～2.85×l0~8 Pa and 10^(-13)～10^(-14) respectively.
关键词
岩石学
镁铁岩
超镁铁岩
杂岩体
mafic-ultramafic complex
petrography
petrochemistry
magmatic diffrentiation
diagenetic environment
