symplectic structure

The geometry of the symplectite and the compositional variation of relevan.

不论变形与否,其早期退变质均表现为绿辉石脉中沿绿辉石边界发育的细脉状透辉石+钠长石后成合晶。

In the sulphide ore from Mashan, Anhui Prdvince, a symplectite of pyrite and magnetiteis found in contact with a pyrrhotite grain with an enbayed boundary convex to the pyrrhotite andis hence interpreted to have resulted from the replacement of pyrrhotite.

在安徽省马山矿区的硫化物矿石中，黄铁矿与磁铁矿呈后成合晶交代磁黄铁矿的结构，是成矿系统物理化学条件向磁黄铁矿-黄铁矿-磁铁矿三相点演化的产物。

The retrogression of ultra-high pressure metamorphic rocks from the Dabie Mountains is verified by the development of symplectite and symplectitic coronas.

大别山地区超高压变质岩的退变质作用表现为后成合晶和后成合晶冠状体的形成，这是薄片尺度不平衡反应的产物。