The exposed width of the vein zone is 10–20 m, the current mining depth is over 6 m. Granite veins, which became yellow–white and fine to medium-grained structures upon weathering, are mainly composed ...
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“Think about the beautiful foothills and mountains — they are full of uranium-rich granite. When the uranium breaks down, radon is produced,” Horton said. “Other reasons involve the fact ...
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