论文部分内容阅读
加拿大阿比提比亚省主要有两种金矿类型:一种是常见的石英脉型,另一种是较稀少的硫化物型。变形作用在这两类矿床中起着重要作用,它与主要的断裂带有关。 硫化物型矿床由前D_2块状硫化物透镜体和同D_2的富黄铁矿细脉组成。它们的周围环绕着前变质期的铝土蚀变,并叠置有后变质期的退变质蚀变。金的带入可能与退变质蚀变有关。石英脉型矿床由网状脉组成。网状咏与主要断裂带周围分布的中等倾角的小型逆冲剪叨带柯关。这些矿咏定位于活动的剪切带内,其周围是后变质期的碳酸盐蚀变晕。两类金矿床有着截然不同的成因历史,并受不同的可转化成各种勘探参数的地质条件的控制。
There are two main types of gold deposits in Abidjan, Canada: one is a common quartz veins and the other is a less sulphide type. Deformation plays an important role in these two types of deposits, which are related to the major fault zones. The sulphide type deposit consists of a former D 2 massive sulphide lens and a pyrite rich vein with D 2. They surround the pre-metaphase Al alteration and are superimposed with retrogressive alteration during the post-metamorphic period. The introduction of gold may be related to retrograde alteration. Quartz vein type deposit consists of reticular veins. Mesh chakra and the distribution of the main fault zone around the mid-small tilt thrust cut with KO off. These ores are located within the active shear zone and are surrounded by carbonate erosions in the post-metamorphic period. Both types of gold deposits have quite different genetic histories and are controlled by different geological conditions that can be converted into various exploration parameters.