Abstract

Mapping of the major structures in the Zuru schist belt and preliminary evaluation of distribution of the locations of gold mineralization relative to these structures was achieved using remote sensing and field data. On the basis of interpretation of remote sensing and field data, four deformational episodes are identified. The first two deformational episodes are ductile in nature, with the first resulting in the development of tight to isoclinal folds with E-W trending axial planes. These folds are refolded during the second folding event, producing open to tight and tight to isoclinal folds with N-S to NE-SW trending axial planes. These folding events are then followed by two brittle deformation events, the first leading to the development of NE-SW strike-slip faults with the second producing NW-SE dip-slip faults. Mineralized veins in the area are found to occur in and around major structures, notably the brittle NE-trending strike-slip faults and ductile E-W and N-S to NE-SW trending folds. However, further studies using geostatistical methods is required to quantitatively ascertain role of the structures on gold mineralization and their distribution within the area.

摘要

使用遥感和现场数据对 Zuru 片岩带的主要构造进行了绘图，并对金矿化位置相对于这些构造的分布进行了初步评估。在对遥感和现场数据的解释的基础上，确定了四个变形事件。前两次变形事件本质上是延展性的，第一次导致形成紧密到等斜的褶皱，具有 EW 趋势的轴向平面。这些褶皱在第二次折叠事件中重新折叠，产生从 NS 到 NE-SW 趋势轴向平面的开放到紧密和紧密到等斜褶皱。这些折叠事件之后是两个脆性变形事件，第一个导致 NE-SW 走滑断层的发展，第二个产生 NW-SE 倾滑断层。该地区的矿化脉出现在主要构造内部和周围，特别是脆性的 NE 走向走滑断层和韧性 EW 和 NS 至 NE-SW 走向的褶皱。然而，需要使用地质统计学方法进行进一步的研究，以定量确定结构对金矿化的作用及其在该地区的分布。