Zhouwu deposit, Yingde City, Qingyuan, Guangdong, Chinai

Regional Level Types
Zhouwu deposit	Deposit
Yingde City	City
Qingyuan	Prefecture-level City
Guangdong	Province
China	Country

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The primary strata exposed at the Zhouwu deposit encompass the Devonian Laohutou Formation and Qiziqiao Formation, along with Quaternary sediments. The Laohutou Formation predominantly consists of siltstone, mudstone, and quartz sandstone. The Qiziqiao Formation primarily comprises mudstone, crystalline limestone, and clayey limestone, with occasional intercalations of bioclastic limestone and carbonaceous mudstone. Notably, the lower section of the Qiziqiao Formation represents a transitional zone between carbonate strata and clastic rock strata, wherein these two distinct lithologies are observed in alternating or interbedded configurations. Magmatic rocks are exposed in a limited area in the northwestern region of the Zhouwu district, close to the Jinmen Reservoir, spanning an approximate total area of 1 km2. The dominant lithologies are granodiorite and biotite monzogranite. Notably, the Jinmen granodiorite exhibits pronounced contact metamorphism with the Devonian strata, resulting in extensive hornfels and skarn alteration. The paragenesis of the Zhouwu deposit are categorized into four distinct stages: (I) garnet-pyroxene alteration stage, (II) iron oxide ore stage, (III) sulfide ore stage, and (IV) carbonate stage.

The Zhouwu Cu-Fe polymetallic deposit, located adjacent to the Jinmen Pluton, is a stratabound skarn-type deposit. Orebodies proximal to the Jinmen Pluton are dominated by magnetite-bearing skarn, whereas chalcopyrite-bearing skarn becomes the predominant lithology toward the north, farther from the pluton. Orebodies exhibit stratiform distribution along the contact zone between limestone and clastic interbeds within the lower member of the Devonian Qiziqiao Formation; locally, they pinch out along strike to form discrete stratabound lenses. Fe orebodies are predominantly hosted in the southern portion of the mining area, with inferred reserves of 24 million tons. Their distribution is controlled by lithologic interfaces, with a dip direction of 100°–112° and a dip angle of 33°–52°. These orebodies have a strike extent of 200 m to 900 m and an inclined depth ranging from 185 m to 840 m. Total iron (TFe) grades vary from 21.4% to 34.8%, averaging 30.15%. Cu orebodies are primarily concentrated in the northern portion of the mining area, with inferred Cu ore reserves of 42,000 tons. These orebodies have a dip direction of 120°–140° and a dip angle of 48°–60°, featuring a controlled inclined depth of 320 m–785 m and a controlled strike extension of 400 m. Cu grades range from 0.34% to 3.32%, averaging 0.71%.

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.

Mineral List

18 valid minerals.

Rock Types Recorded