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为了研究火山塌陷构造与金矿脉系统之间的成因关系,本文讨论了日本九州南部和中部地区金矿化的地质条件。 九州南部和中部地区的地质为上新世到第四纪的陆相安山岩为主的火山活动,并形成了许多破火山口。金矿化便产在这些破火山口边缘的破碎带中,并常产在两个或多个破火山口之间的破碎带更为发育的地区。 1991年2月,日本金属矿事业团在九州中部大分县引治地区的钻孔中,发现在两个破火山口之间有富金石英脉(Au:171.5×10~(-6),Ag:811×10~(-6))。为此预测了该区具有金矿床发育的前景。从而火山塌陷模式对于金矿勘查的意义便得到认识,即破火山口及伴随的构造是对金勘查十分有利的区域。
In order to study the genetic relationship between the volcanic collapse structure and the gold vein system, the paper discusses the geological conditions of gold mineralization in southern and central Kyushu, Japan. The geology in southern and central Kyushu is the volcanic activity of the Pleistocene to Quaternary continental andesite and forms many caldera. Gold mineralization is produced in the crust on the verge of these caldera and is often found in more developed areas between two or more caldera. In February 1991, the Japanese metal mining group found that there are gold-rich quartz veins (Au: 171.5 × 10 -6, Ag) between the two caldera holes in the Jizhi area of central Oita Prefecture in Kyushu. : 811 × 10 -6 (-6)). To this end, it is predicted that the area has the prospect of gold deposit development. Therefore, the significance of the volcanic collapse model to the exploration of gold deposits is known. That is, the caldera and its accompanying structures are very favorable areas for gold exploration.