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一、矿区地质简述(图1) 驰名中外的箇旧锡矿位於我国云南省南部。锡矿产区主要分布於箇旧市以东之南北狭长形高地上,北部为马拉格、松树脚矿区,中部为老厂,南部为卡房。矿区地势由北至南逐级成阶梯式下降,平均海拔2,100—2,300米。矿区主要为中三叠纪箇旧灰岩所构成,喀斯特地形特为发育,出露岩层皆侵蚀呈锯齿状或筍形;地表无长年性水流,盲谷、盆地、溶沟、漏斗皆为第四纪洪积层所充填。此外在箇旧以西,沿花岗岩基边缘分布有牛屎坡、六方寨、贾石陇、陡岩及普雄等矿区。
First, a brief geological mining area (Figure 1) Renowned Chinese and foreign old tin mine is located in southern China’s Yunnan Province. Tin mining areas are mainly distributed in the southeastern southeastern plains of Jiuzhaigou. The northern part of the area is the Maragugo and Songshuchu Mines, the middle part is the old factory and the south part is the card room. The terrain of the mining area has stepped down from north to south step by step, with an average elevation of 2,100-2,300 meters. The mining area is mainly composed of the Middle Triassic 箇 old limestone. The karst topography is particularly developed. The exposed rock formations are jagged or bamboo-shaped. The surface has no annual water flow. The valley, basin, ditch and funnel are all Quaternary alluvial filling. In addition, there are Niu Shushan, Liufangzhai, Jiashilong, steep rock and Puxiong mining areas along the edge of granite.