GRANITE PROVINCES AND ASSOCIATED ORE DEPOSITS OF JAPAN AND OF THE CONTINENTAL MARGIN ADJACENT THERETO

利用稀土元素模式、初始锶比和花岗岩类型对飞驒带与韩国侏罗纪花岗岩类进行了比较。从资料中可以看出两个地区侏罗纪花岗岩类的异同。主要表现在：1)两地区侏罗系花岗岩的模态组成相似；2)飞驒带侏罗系花岗岩类的放射性年龄略高于韩国侏罗系花岗岩类的年龄；3)侏罗系花岗岩类的类型、初始锶比和稀土模式存在差异。这说明两个地区侏罗纪花岗岩类的物质来源和成因不同。虽然对两地区侏罗纪花岗岩类的地质关系下结论尚不成熟，但从两地区初始锶比值的差异来看，与Hida带侏罗纪花岗岩类相比，韩国侏罗纪花岗岩类可能位于大陆侧。

A comparison of the Jurassic granitoids between the Hida belt and South Korea has been made utilizing the REE(rare earth element) pattems, initial Sr ratios, and types of granitoids.From the data, it will be seen that similarities and dissimilarities of the Jurassic granitoids between two regions. These are: 1) The modal composition of the Jurassic granitoids are similar between the two regions; 2) the radiometric ages of the Jurassic granitoids in the Hida belt are a little older than the ages of the Jurassic granitoids in South Korea; 3) the types, initial strontium ratios, and REE patterns of the Jurassic granitoids are different.These facts mean that source materials and genesis of the Jurassic granitoids between two regions were different. Although it is still immature to conclude the geological relations of the Jurassic granitoids between the two regions, from the difference in the initial strontium ratios between the two regions, it is suggested that the Jurassic granitoids in South Korea may have been situated in the continental side compared with the Jurassic granitoids in the Hida belt.