Baitai Be deposit, Jiulong County, Garzê Autonomous Prefecture (Ganzi Autonomous Prefecture), Sichuan, Chinai

Regional Level Types
Baitai Be deposit	Deposit
Jiulong County	County
Garzê Autonomous Prefecture (Ganzi Autonomous Prefecture)	Prefecture
Sichuan	Province
China	Country

In this region, the strata of the Triassic Xinduqiao formation are exposed, mainly consisting of intercalated calcareous slate and black sandy slate interspersed with metamorphosed sandstone and other shallow-metamorphic rocks. The main magmatic rock exposed in the mining area is the Baitai granite, covering an area of ~90 km2. In the Baitai mining area, 154 granite pegmatite veins have been discovered. These veins are hosted within the granite and display relatively straight boundaries, with occasional local undulations. The majority of the veins are 1~15 m wide, a few are 30~50 m wide, and they extend approximately 50~500 m. Their dominant orientation is northeast, but a few trend north–northeast. According to the distribution of the pegmatite veins, the mining area is classified into two groups of veins: the southern and northern vein groups. The southern vein group primarily occurs in biotite monzonitic granite, forming vein-like and branching structures with larger sizes. The veins are approximately 5~30 m wide, extend for 100~300 m, and exhibit better beryl mineralization. The northern vein group mainly occurs in the northern part of the biotite monzonitic granite and is characterized by regular vein structures with smaller sizes and weaker mineralization. The mining area contains 115 beryllium-mineralized veins, and 13 beryllium ore bodies have been delineated. The ore bodies are controlled by the zoning of the veins and are mostly located in the massive zone in the central part of the veins. Their strikes are consistent with those of the pegmatite veins, and their dip angles mainly range from 60° to 80°, with some between 20° and 40°. The lengths of the ore bodies vary from 50 to 200 m, and they are 1~5 m thick. The extension varies considerably, with most being between 20 and 100 m and a few extending up to 150 m.

Other Regions, Features and Areas containing this locality

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