Dahutang W-(Sn) ore field, Wuning Co., Jiujiang, Jiangxi, Chinai

Regional Level Types
Dahutang W-(Sn) ore field	Ore Field
Wuning Co.	County
Jiujiang	Prefecture
Jiangxi	Province
China	Country

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The Dahutang area is located in the middle of the Jiangnan orogenic belt, which is an important tungsten polymetallic metallogenic concentration. The proven tungsten resources in the Jiangnan tungsten ore belt are nearly 6.06 Mt, of which the Dahutang tungsten resources are 1.1 Mt. The exposed stratum in Dahutang ore region is the Neoproterozoic Shuangqiaoshan Group, which is a deep-sea volcanic clastic sedimentary formation formed in a fault depression environment. The lithology is dominated by greyish green greywacke and slate interbedding, with a little complex metamorphic conglomerate. The intrusion includes Neoproterozoic biotite granodiorite and Mesozoic granite, and the latter is related to the genesis of W, Cu, and Sn deposits in this area. Tungsten polymetallic deposits, such as Shimensi, Shiweidong, Kunshan, Dalingshang, and Dawutang are distributed in the ore region.

Fifteen large, medium, and small mineral deposits and ore occurrences have been identified in Dahutang and its marginal area, forming a significant ore concentration zone dominated by W associated with Cu, Mo, Li, Sn, Nb, Ta, and other rare metals. The region hosts resources of 1.46 × 106 t of WO3, accompanied by 0.69 × 106 t Cu and 30,600 t Mo. Multiple large-to-medium-sized W-Cu-Mo polymetallic deposits are distributed across the area, including the Shimensi, Dawutang, Shiweidong, and Kunshan mining areas.
The orefield comprises the following four main genetic ore types: disseminated-vein type, altered-granite type, hydrothermal cryptoexplosive breccia type, and large quartz-vein type. Among these, the first two are the most economically important and exhibit typical porphyry-style characteristics, including pervasive whole-rock alteration and mineralization, low-grade ore, and large-tonnage deposit scales. The industrial W ores are primarily of the following two kinds: scheelite-dominant ores with minor wolframite and sulfides in the disseminated veinlet and altered granite, and wolframite-dominant ores with minor scheelite and sulfide in the quartz vein. Disseminated-veined and altered-granite ores occur in the contact zones between Mesozoic granites and Neoproterozoic biotite granodiorite. These orebodies generally have gentle dips, typically at 10°–30°, largely consistent with the orientation of the contacting surfaces. These types are well-developed in the Shimensi and Dawutang mining areas. Disseminated-veined ores distributed within the exocontact zones (the Neoproterozoic granodiorite) are the most important type in the mining area, exhibiting higher grade and better mineralization continuity, whereas those in the endocontact zone are generally thinner, lower-grade, and discontinuously mineralized. Hydrothermal cryptoexplosive breccia type ores are mainly distributed in the upper parts of the Mesozoic granites, with ore orientations perpendicular to the intrusive contact surfaces. The breccia matrix consists of magma melt or felsic hydrothermal materials, while the clasts are predominantly Neoproterozoic granodiorite, with minor Mesozoic granite. These ore bodies exhibit complex morphologies and are dominated by veinlet-disseminated mineralization. Quartz-vein type ores are primarily hosted within Neoproterozoic granodiorite and Shuangqiaoshan Group, and their occurrence is mainly controlled by fracture structures. This type is commonly observed in the Shimensi, Shiweidong, and Kunshan mining areas. These ores have the highest W average grade (0.282%) and account for about 1% of the total W resource.

WO3 2.00 Mt @ 0.152%; Cu 0.12 Mt @ 0.67%; Mo 0.08 Mt @ 0.098%

Commodity List

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Mineral List

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32 valid minerals.

Rock Types Recorded

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