Heilongtan Au deposit, Sui Co., Suizhou, Hubei, Chinai

Regional Level Types
Heilongtan Au deposit	Deposit
Sui Co.	County
Suizhou	Prefecture
Hubei	Province
China	Country

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Xiejiagou is 3km SE of Heilongtan.
The Heilongtan-Xiejiagou Au deposit is composed of Heilongtan, Wangjiawan and Xiejiagou ore blocks, distributed along the Heilongtan fault from northwest to southeast. As a medium-sized Au deposit, the Heilongtan-Xiejiagou deposit contains average Au grade of 5.04 g/t and Ag grade between 155.6 and 221.6 g/t. This deposit is one of the most economic deposits discovered in recent years. Heilongtan is located about 45 km northwestern of the Suizhou city.

Nineteen exposed and five concealed ore bodies are identified recently that comprise 1595 kg Au and 46762 kg Ag. These ore bodies occur in the alteration zone and appear bedded, lentoid and veined, which share some similar occurrences.

The mine area is underlain mainly by Proterozoic volcanic–sedimentary sequences of the Wudang and Yaolinghe groups. The Wudang Group consists chiefly of intermediate- to felsic volcaniclastic-derived schists, including muscovite–albite schist, chlorite–epidote–albite schist, and albite leptynite. The Yaolinghe Group is dominated by intermediate- to mafic metavolcanic rocks, mainly actinolite–epidote–albite schist and chlorite–actinolite–epidote schist, and commonly contains epidote-rich segregations and locally preserved amygdaloidal textures. Gold mineralization is discontinuously developed along a ca. 4 km long corridor trending NW to NWW within strongly deformed greenschist-facies rocks.
Four blocks controlled by shear zones are recognized along strike, from northwest to southeast: Heilongtan, Wangjiawan, Xiejiagou, and Shizikou. In the Heilongtan block, 24 orebodies have been delineated, including 19 exposed and 5 concealed bodies, with estimated resources of ∼1.6 t Au and ∼46.8 t Ag. In the Wangjiawan, Xiejiagou, and Shizikou blocks, 18 gold orebodies have been identified, with estimated resources of ∼4.8 t Au and ∼23.4 t Ag. Ore grades vary markedly, ranging from 1.28 to 70.06 g/t Au (mean ∼3.66 g/t) and from 1 to 80 g/t Ag (mean ∼16.68 g/t). The ores also contain minor base metals, with mean contents of ∼0.12 wt% Cu, ∼0.01 wt% Pb, and ∼0.04 wt% Zn.
The three stages are defined as follows: quartz–sericite–pyrite stage (Stage I); quartz–pyrite stage (Stage II); quartz–polymetallic sulfide stage (Stage III).

Commodity List

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

Mineral List

19 valid minerals.

Rock Types Recorded