Study on establishing a mining group of deposit and an exploration grid pattern for lead - zinc ore in Ban Lim area, Cao Bang province
- Cơ quan:1 Faculty of Geosciences and Geoengineering, Hanoi University of Mining and Geology, Vietnam 2 Dong Bac Geological Division, Cach Mang Thang Tam road, Thai Nguyen City, Thai Nguyen, Vietnam
- Từ khóa: Ban Lim area,Exploration grid pattern,Lead-zinc ore,Mining group.
- Nhận bài: 05-02-2020
- Chấp nhận: 26-05-2020
- Đăng online: 30-06-2020
- Lĩnh vực: Địa chất - Khoáng sản
Ban Lim area in Cao Bang province has proposed a high potential of lead-zinc resources, which have occurred in different rocks of geological formation. The paper-based on collecting, synthesizing, and geological processing data. In addition, mathematical methods were also applied to recognize studied objects of the exploration process using a quantitative description. The results how that the lead-zinc orebodies in Ban Lim area mainly occurred in lens-shaped and distributed in layered surfaces of the dolomitized limestone of Coc Xo formation. The average lead-zinc content of the orebodies is in a range from 3.27% to 8.33%; its coefficient of variation (Vc) is in a range from 13.71% (evenly) to 137.92% (very unevenly). Generally, the lead-zinc contents of the orebodies in Ban Lim area mainly comply with the standard normal distribution. The average thicknesses of the orebodies are in a range from 0.92 m to 6.48 m, its coefficient of variation (Vm) is in the range from 8.7% (stable) to 132.95% (very unstable). Quantitative calculation results have shown that Ban Lim lead-zinc deposit belongs to group III of deposits. For the exploration of this type of minerals, it is recommended to use a linear grid pattern. Appropriate exploration grid pattern for the 122 category reserve is (60÷80) m × (30÷40) m. These calculated results are well- documented foundations that allow suggesting a mining group of deposit and an exploration grid pattern for lead-zinc ore in Ban Lim area and other lead-zinc deposits occurring in similar geological settings.
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