| Gansu Yangshan gold mine is a very large gold deposit. In the1990s, after thehard work of the Chinese People’s Armed Police of the twelfth team, the gold deposithas been discoveried. After nearly20years of exploration work, the current provengold resources close to400t. Currently, the Yangshan gold mine at home and abroad.Combined with the nature of my work, finishing the previous system based on theresearch results of Yangshan gold mine, with emphasis on observation and analysis ofresearch and field work in geological phenomena firsthand descriptions mainly torecognize the further development of the Yangshan gold mine, clear understanding ofthe geological characteristics of gold is particularly important. After a fieldinvestigation and light, thin section analysis and other rock mineralogy, petrography,mineral phase learning methods, focusing on analytical geological features Yangshangold mine, made the following understanding:1Yangshan gold deposit and its genetic model type is more complex, there is noclear, said many factors controlling ore-stratigraphic, tectonic, magmatic activity,altered circumstances have an impact on the mineralization, but the structure ofcontrol mine more prominent role. In the late Triassic, the North China plate and theYangtze plate collision split Paleotethyan northern ocean basin off Mianlue formedsuture. Wen County southward series arc faults prominent curved suture breakageconstitute, including conifers-pear Ping fracture, Ann Changhe-Guanyin dambreaks, Ma mill-Wei Xiangjiaba fracture and White Horse-Riverside fracture.Among them, Ann Changhe-fracture is Guanyinba Devonian boundary fault zonesouth and north with the band, is the main ore-controlling structure Yangshan goldmine.2Yangshan gold mine in the tectonic position in the Sichuan, Shaanxi, Gansu"Golden Triangle" area, in the north of the Yangtze block, south of the Qinlingorogenic belt, Songpan-Ganzi block east. Regionally, the area is less exposedmagmatic rocks, only some segments within each mineral acid intrusive dykes andsmall rock outcropping smaller plants in Zhangjiashan Guanyinba and granite porphyry also developed a small rock, a small area, about1~2km2. Althoughclosely related to part with gold porphyry veins space, but only by the same tectonicsystem between the control and no close genetic relationship.3Yangshan gold deposit is a typical representative of large Carlin-type golddeposits in recent years, with the deepening of research, some scholars have pointedout that in the orogenic gold also yields up. Yangshan gold mine complex geologicalfeatures, unique geochemical characteristics of large-scale deposits, as well aslow-grade gold ore mineral assemblage, multi-wall rock alteration and other featuresconsistent with Carlin-type gold deposit, but the fluid nature of the multi consistentwith orogenic gold, also has some of the characteristics of Carlin-type and betweentwo types of orogenic deposits.4Currently, the initial establishment of the Armed Police Force Yangshan goldbelt prospecting model; nine predicted targets deep veins of the lower plate325andNo.311(327) veins conducted, have proposed, in which311Vein5,325(327) vein4;4blind ore forecast target, where311vein3,325(327)1. Added preliminary forecastamount of7,282,305tons of ore, add the amount of metal31711Kg. The new forecastincrease in the amount of resources, expand the scale of reserves was a blueprintYangshan gold, gold prospecting prospects brighter.In the future exploration work, Yangshan gold prospecting direction can focus oninvestment to the following sections, one Mud Mountain-Tom Bu ditch section, thesecond is ge Bay-Ann Dam mine section, the three tall mountains-Yangshan miningsegment. |
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