Jiucaide and Jilogshan bodies are located at 6km to the north of Wuji- ngfu town, Jieyang County and 15km to the northwest of Shantou City respe- ctively, They are both in form of volcanic cones with area less than 0.2 km2, The volcanic rocks are mainly consisted of basanites and alkali-olivine basalts with abundance of ultramafic inclusions-spineI Iherzolites which chara- cterised by inequigranular and porphyroclastic textures, The basaltic rocks in composition belong to the potash subseries of alka- line series and are characterized by higher CaO, K20+Na2O and TiO2, and lower SiOz and A1203, Except for enrichment of the incompatible elements, such as P, K and Ti, the basalts, have higher AI2O2/Ca0 ratio, with M value=60-70, index of consolidation nearly to 40 and degree of melting=4%.All these features indicate that the basaltic rocks are product driven from the mantle peridotite, The fusible componealts of the ultramafic inclusions are similar to that of fertile mantle, The olivines and the orthopyroxenes in the ultramafic inclusions have lower Fo and En respectively, and the clinopyroxenes are characterized by higher AI2O2, TiO2 and Na2O, The calculated temperature and pressure for the Iherzolites are confined to 10500C and 21.6 × 108 Pa respectively, The basa- ltic rocks have a high RFE abundance with enrichment of LREE, and La/Yb =15.63. The REE abundance of ultramafic inclusions approaches to that of the primary mantle,