Geochronology research on the volcanic rock profile of the gazha cun group in the wuyii basin indicates that the 40ar - 39ar age of the post - collision volcanic rock is 12 - 14ma . and the granite that cut the volcanic rock is 10 . 84ma 羊应乡火山岩样品中透长石及黑云母的~ ( 40 ) ar - ~ ( 39 ) ar定年结果确认该区存在后碰撞火山岩，其喷发年龄在11ma左右。
The peak is composed of banded biotite tonalite of fine mediate grain developing in mengshan rock suit of fuping period of archean era about 2 . 7billion years ago . it ' s very steep 由27亿年左右形成的太古代阜平期蒙山岩套条带状中细粒黑云母英云闪长岩构成，柱状节理发育，差异性风化剥蚀作用强烈，组成云蒙“山”峰，俗称“挂心崛子” ，形容云蒙峰之陡峻。
Taiping maifan mineral contacts with migmatitic granite and grandiosity , the mother rock is granite which include a lot of potassium elements and the major mineral of maifan stone is plagiocase , k - feldspar , minor mineral is biotite , muscovite , quartz and so on . , 麦饭石的主要矿物为斜长石、钾长石，次生矿物为黑云母、白云母、石英等，岩石化学类型属钙碱系列，主要微量元素和稀土元素均与中华麦饭石相近。
Influences of ph values , ferrous minerals ( reduced iron powder or magnetite ) , bentonite , concentration of cations and anion ( fe3 + , fe2 + and co32 - ) on the distribution coefficient , kd , were studied . the sorption mechanism of 99tc on granite was discussed by the desorption method of adding h2o2 into desorption solvent . based on the diffusion coefficient measured and the solution of the diffusion equation , the distance of tc diffusion after ten thousand years was predicted 本文分别在大气和低氧条件下，研究了tc在花岗岩上的吸附和扩散，包括溶液的ph 、含铁矿物(还原铁粉、 fe3o4 ) 、膨润土、阴阳离子的浓度( co32 - 、 fe3 + 、 fe2 + )对tc在花岗岩(石英、黑云母)上吸附kd值的影响；在解吸剂中加入h2o2 ，对tc进行解吸，探讨了其吸附的机理；将扩散系数代入扩散方程的解析解，预测了10000年后， tc扩散的距离。
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。
2 both the hanging wall and the footwail rock of ore bodies are garnet biotite schist , protoliths are alkaline volcanic rocks ( tracyh andesite ) . according to characteristics of trace elements assemblages and the setting of tectonics , these alkaline volcanic rocks were derived from the lower degree melting of metasomatic and enriched mantle ( eml ) in the initial stage of middle proterozoic epoch . they strongly enriched in large ion lithophile elements ( lile ) , such as ba 2 、矿体顶、底板围岩(石榴石黑云母片岩、钠长黑云母片岩等)的原岩为碱性火山岩(粗面安山岩) ，相对富集大离子亲石元素ba 、 cs 、 rb 、 k 、 lree及贫zr 、 sr 、 ti 、 hf 、 hree ，为早元古代末期-中元古代早期交代富集地幔低程度部分熔融所形成的碱性火山岩。
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。
