Successive titrimetric determination of total iron and titanium dioxide in titanite using k2cr2o7 solution as titrant 重铬酸钾滴定法连续测定钛铁矿中二氧化钛及总铁
3.
The microscopical observation proves that the main types of granitoid rocks are granodiorite and quartz monzodiorite , and the enclave is mainly monzodiorite . the rock - forming minerals are mainly k - feldspar , plagioclase , amphiboie , biotite , quartz , magnetite , titanite , apatite , epidote , etc . the zonation of the feldspars is very popular . the dark - colored minerals , such as biotite and titanite , have been highly oxidized 通过对本区花岗岩类样品进行显微观察研究，知其主要的岩石类型为花岗闪长岩、石英二长闪长岩，其中的岩石包体主要为二长闪长岩，其造岩矿物为钾长石、斜长石、角闪石、黑云母、石英、磁铁矿、榍石、磷灰石和绿帘石等，长石中环带现象比较常见，黑云母、榍石等暗色矿物颜色较深，表明其氧化程度较高。
4.
The main element analysis of whole rocks , the ree analysis and the trace element analysis have been done for the granitoid samples in this area . the chemical composition analysis has been done for the amphiboie and biotite minerals . the epma and x - ray powdered crystal diffraction have been done for k - feldspar , plagioclase , amphiboie , biotite , quartz , magnetite , titanite 对本区花岗岩类样品进行了全岩主量元素、稀土元素及微量元素分析，对角闪石和黑云母单矿物进行了化学成分分析，对钾长石、斜长石、角闪石、黑云母、及石英、磁铁矿、磷灰石和榍石进行了电子探针和x射线粉晶衍射分析。
