Shuangjing-Liujiashan-Chashan ore field, Nanling-Xuancheng ore district, Xuanzhou District, Xuancheng, Anhui, Chinai

Regional Level Types
Shuangjing-Liujiashan-Chashan ore field	Ore Field
Nanling-Xuancheng ore district	Ore Field
Xuanzhou District	District
Xuancheng	Prefecture-level City
Anhui	Province
China	Country

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In the SLC ore field, the primary economic orebodies are hosted within carbonate strata of the Upper Carboniferous Huanglong–Chuanshan and Lower Permian Qixia formations. Mineralization is spatially constrained by the interplay of favorable lithological contacts and skarn alteration zones.
Prograde skarn stage: The stage represents the earliest phase of the hydrothermal–metasomatic system. The distribution and intensity of skarn alteration are chiefly controlled by the pyroxene diorite, and early contact metasomatism is best preserved along the intrusion–skarn boundary, particularly on the intrusion-proximal side. Skarn veins locally cut the pyroxene diorite, and the intrusion adjacent to the skarn commonly exhibits pronounced K-feldspathization.
Retrograde stage: This stage represents the progressive evolution of the skarn system, marked by the retrograde overprinting of the earlier anhydrous mineral assemblages by newly formed hydrous minerals. Although garnet and diopside are still present, their relative abundances decrease, and they typically appear as finer-grained crystals. This reflects a change in the main mineral assemblages of the skarn system. Hydrous minerals (vesuvianite, chlorite, and epidote) become widely distributed; among these, retrograde metasomatism dominated by chlorite and epidote preferentially overprints the early anhydrous skarn assemblage, producing widespread pseudomorphic replacement of garnet and diopside and leaving abundant metasomatic relic textures.
Early sulfide stage: This is the principal ore-forming stage, during which most economically significant orebodies formed. Mineralization is dominated by a quartz–pyrite–sphalerite–galena–arsenopyrite assemblage, occurring mainly as veins and locally as stratabound bodies developed along the outer skarn front and within marbleized carbonate wall rocks.
Late sulfide stage: This stage represents waning hydrothermal activity following the main mineralization event. It is characterized by thin calcite–sphalerite–pyrite veinlets with minor quartz that fill fractures and cut both the skarn and surrounding wall rocks.

Commodity List

This is a list of exploitable or exploited mineral commodities recorded from this region.

Mineral List

Mineral list contains entries from the region specified including sub-localities

13 valid minerals.

Rock Types Recorded

Rock list contains entries from the region specified including sub-localities