The existence of recycled basaltic oceanic crust in the axial zone of mantle plume may be the key of the formation of giant V-Ti-magnetite deposits.

岩浆源区再循环玄武质洋壳的存在可能是该区超大型钒钛磁铁矿床形成的根本原因。

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It is necessary and feasible to establish "V" type economic zone in the central part of Jilin.

构建吉林省中部“V”型经济带，既十分必要，又切实可行。

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