Geological characteristics and prospecting significance of Gao'aobei quartz-veinlets-zone type W-Mo deposit in Rucheng County, Hunan Province

Based on previous survey and detailed study, the authors focused on the characteristics of the ore-bearing quartz veins and investigated the multistage magmatic activities and mineralization. Besides, the horizontal zoning of metal element and vertical zoning of W-Mo deposit were also summarized. The Gao'aobei deposit belongs to a veinlets-zone type W-Mo deposit that formed at Early Yanshanian period. The W-Mo deposit is characterized by 0.5-5 cm W-Mo-bearing veinlets or micro-veinlets, filling into the upper parts of Indosinian biotite monzogranite, and is covered by the hornfels of Xiangnan Formation in Cambrian, with complete metallogenic system. The quartz veins are distributed in all directions, and the optimum attitude is NWW strike and NNE dip. The main W-Mo orebody is continuous, with a feature of low grade and large tonnage. The main ore minerals are wolframite and molybdenite, with a vertical zoning developed as upper tungsten and lower molybdenum. The discovery of this large-scale veinlets-zone type W-Mo deposit is of great significance to prospecting the same deposits in future in Hunan Province.