Banded iron formation (BIF), hosted in a box syncline in the western of the two ore belts worked by the Qian'an Mine. The deposit consists of stratiform and lensoid bodies. They are not continuous, extend 4600 m along strike and are 9-63 m thick. The minerals occur mainly in bands, and to a lesser extent in laminae and masses.
Ref.:
- http://wrgis.wr.usgs.gov/open-file/of03-220/DATABASE/lode_deposits.txt
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Map Reference: 40°10'0"N , 118°31'47"E
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