Fengjiayu Fe deposit, Miyun Co., Beijing Municipality, China

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Banded iron formation (BIF), occurring in the Shenmiao Formation of the Archean Zhangjiafen Group that consists of varied biotite amphibole gneiss, amphibolite, quartzite, biotite schist, and local migmatite. The orebodies are mainly stratiform, lenticular, and lensoid; branching and mingling are common. The host units are magnetite quartzite, magnetite gneiss, magnetite amphibolite, magnetite-amphibole quartzite and garnet-magnetite gneiss. The main ore mineral textures are granoblastic and metasomatic. Ore mineral structures are typically banded, disseminated, gneissic, and massive.

Mineral List

Actinolite

'Albite-Anorthite Series'

Calcite

Epidote

Hematite
var: Martite

Magnetite

Muscovite
var: Sericite

Quartz

Talc

Tremolite

16 entries listed. 9 valid minerals.

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References

- Kamitani, M., Okumura, K., Teraoka, Y., Miyano, S., and Watanabe, Y. (2007): Mineral Resources Map of East Asia. Geological Survey of Japan.

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