In the light of isotopic data, this paper deals with geological and geochemical characteristics, the origins of Baerzhe rock body and the 18 O_low alkali granites in eastern China.

The tectonic setting of the alkali granite of the Erhedian area (Hanconggou succession),Dunhua City and its geologic features;

Age dating of alkali granite in Jingesitai area of Dong Ujimqin Banner,Inner Mongolia,and its significance

Xuebaoding alkali granites have high concentrations of W, Sn, Be and other trace elements assemblages characteristic of ore-forming native rocks.

The kelameili high-alkaline granite belt consists of seven super-unites and the rocks are moyite and alkali-granite.

On the basis of the rock type, texture and structure and formations age of the Kuiqi miarolitic granite batholith it is devided into 4 units:1) Miarolitic biotite-feldspar granite; 2) Medium-coase-grained mioroliticalkali-granite; 3) Porphyritic miarolitic alkali-granite; 4) Fine-grainedmiarolitic alkali-granite.

Kinetics of oxygen isotope exchange between water and minerals of miarolitic alkaline granite from Nianzishan;

Based on the magma dynamic analysis with the geochemical and geological characteritics of Dalabut type alkali granitoids,We assumed that the alkali granitic rocks were derived from a high silica magma that originated from vapor absent partial melted granulitic protolith in the deeper crust,caused by intrusion of basaltic magma and interaction existing between the basaltic magma and the protolith.

Based on the characteristics of hornblendes, we classified the alkali granitoids as two types.