GEOLOGY, GENESIS AND PROSPECTING INDICATORS OF SUNJIAGOU LEAD DEPOSIT IN LIAONING PROVINCE
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摘要:
孙家沟铅矿主要赋存于层山单元中细粒黑云母花岗闪长岩中, 为断裂构造控制的低温热液型矿床, 铅矿体主要受F2、F3断裂控制. 矿右主要金属矿物为方铅矿、闪锌矿及少量黄铁矿、黄铜矿等. 矿石结构主要为自形粒状结构、碎裂-角砾结构、脉状充填结构. 矿石构造以角砾状、浸染状、团斑状为主, 少数为块状构造、脉状构造等. ①号矿体铅品位主要介于0.314%~1.309%, 平均品位0.601%;②号矿体铅品位主要介于0.468%~1.460%, 平均品位0.776%. 根据工业指标圈定为低品位铅矿石.
Abstract:The Sunjiagou lead deposit is mainly hosted in the fine-medium-grained biotite granodiorites of Cengshan Unit, belonging to epithermal type, with the orebodies mainly controlled by F2 and F3 faults. The main metallic minerals of lead ore are galena and sphalerite, with minus of pyrite, chalcopyrite, etc. The ores are in idiomorphic granular, cataclastic-brecciated and vein-filled textures, with brecciated, disseminated and massive spotted structures dominated and a few massive and vein structures. The lead grade of No. 1 orebody ranges mainly from 0.314% to 1.309%, averagely 0.601%, while that of No. 2 orebody is 0.468%-1.460%, averagely 0.776%, which are delineated as low-grade lead ore according to industrial index.
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Key words:
- lead deposit /
- prospecting indicator /
- genesis of deposit /
- epithermal type /
- Liaoning Province
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表 1 土壤地球化学测量Pb元素异常特征表
Table 1. Pb anomaly characteristics by soil geochemical survey
异常编号 异常分布 异常形态 样点 面积/km2 异常强度/10-6 平均值 最大值 Pb-1 测区西北部 四边形未闭合 32 0.0069 618.219 1 292 Pb-2 测区东北部 不规则 153 0.035 549.869 1 689 Pb-3 测区西北部 不规则未闭合 12 0.0029 741.75 2 189 Pb-4 测区中东部 近椭圆形 5 0.0013 1016.8 2 049 Pb-5 测区中部 不规则 22 0.008 828.091 5 071 Pb-6 测区中部 近圆形 2 0.0007 1167.5 1 864 Pb-7 测区西南部 不规则 5 0.0016 756.2 928 Pb-8 测区西南部 长条状 11 0.0029 669.545 1 389 Pb-9 测区西南部 近圆形 10 0.0025 587.7 1 011 Pb-10 测区西南部 不规则 15 0.0037 550.467 967 Pb-11 测区西南部 不规则 15 0.0036 534.667 1 012 -
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