Neoproterozoic nanhua intrusive rocks

The intrusive rocks in this period were undeveloped. They are found in the Weihai-Rongcheng fault uplift in the east of Shandong Peninsula, and distributed in Yujiashan in Rongcheng, Tangjia in Wendeng Southern Song Dynasty, and Gushan in Weihai, with an area of about 1 10km2. Only gneissic fine-grained aegirine and magnetite alkali feldspar granite units are exposed in Yujiashan. The rock is strip-shaped and short-plate-shaped, and the north-south and northeast directions are irregular. It invaded Jingshan Group stratum, Haiyangsuo and Rongcheng superunit, and was invaded by Weideshan superunit in Mesozoic. Jingshan Group, Haiyangsuo Superunit and eclogite residual inclusions are common in the rock mass, which has undergone dynamic metamorphism and developed gneiss. The mine field is a set of granite gneiss, which is fleshy red and brownish yellow after weathering, with fine-grained crystal structure and gneiss structure. It consists of plagioclase, potash feldspar, syenite, amphibole, aegirine and magnetite. Table 2-5 reflects the values of chemical parameters: acidic rocks with high anisotropy in the Pacific type calc-alkaline rock series, Fe O/Mg O molecular ratio, A/NKC.