Scattered facts about the general geology and mineral resources of Yunnanhave been slowly accumulated for nearly half a century [61] and we can saythat Yunnan is known geologically, but unfortunately it is not well known.Previous workers, especially J. Deprat [17] and J. Coggin Brown [9 11], havealso contributed much to our knowledge concerning the Cenozoic geology of this Scattered facts about the general geology and mineral resources of Yunnanhave been slowly accumulated for nearly half a century [61] and we can say that Yunnan is known geologically, but unfortunately it is not well known. Previous workers, especially J. Deprat and J. Coggin Brown [9 11], haveal so contributed much to our knowledge concerning the Cenozoic geology of this