| Characteristics of Ore-controlling Structures and Ore Emplacement Mechanism in the Shihu Gold Deposit,Hebei Province - A Case Study of the No.101 VeinEI北大核心CSCD |
| |
| 作者单位： | 1.College of Resource and Civil Engineering, Northeastern University, Shenyang, 110004, LiaoningLiaoning;2.Shihu Mining Co. Ltd., China Gold Group, Shijiazhuang, 050500, HebeiHebei; |
| |
| 摘 要： | The Shihu gold deposit lies in the middle-northern Taihang Mountains and is strictly controlled by faults. The ore-controlling structures in the mining district are not well-documented. Detailed field observation and laboratory investigation of the No.101 vein indicated that the ore-controlling structures of the Shihu gold deposit are the pre-Mesozoic shear joints with SN and NW strike that reactivated during the Yanshanian emerged from. The NNW-SSE left-strike-slip stresses during the main mineralization stage led to the dilation of the NW-strike structural segments along the roof and footwall of the early quartz diorite porphyrite veins, which contributed to the extensive wall-rock alteration, intensive gold mineralization and occur as quartz-vein type ores, and consequently the formation of rich ore pillars. On the contrary, the SN-strike compressive structures correspond to the weak wall-rock alteration and gold mineralization and occur as altered-rock type ores. All the rich ore pillars laterally distributed with high-angle (70°±), and wholly pitched southward with 40° angle. According to the structural ore-controlling regularities, the location between the No.47 and the No.61 exploratory line with elevation below 150 m is an excellent ore-prospecting area. Our prospecting proposal based on the ore-controlling structural analyses in the study area has been proven by the underground works in the Shihu gold deposit. © 2017, Science Press. All right reserved.
|
| 本文献已被 维普 等数据库收录！ |
|
