Guizhou, China

Main commodities: Au
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The carbonate hosted, Carlin style Getang gold deposit is located in southwestern Guizhou Province in the Golden Triangle of southern China.

The Golden Triangle is located at the southwestern margin of the Archaean to Proterozoic Yangtze Craton within the Phanerozoic Nanpanjiang or Youjiang basin. The Nanpanjiang basin was initiated by Cambrian extension of the Yangtze Precambrian basement, and contains sedimentary rocks that range from Cambrian to Triassic in age, although the bulk of outcrop is of Permian and Triassic age.

The observed deformation within the Youjiang basin is predominantly due to the Late Cretaceous Yanshanian orogen which resulted in smallscale folding and domal structures, with which gold deposits are commonly associated. Apart from minor dykes, there is no associated magmatic activity.

For background on the geological setting see the see the Golden Triangle record.

The gold mineralisation at Getang is hosted by the Early Permian Mookou and Late Permian Longtan formations, both of which also contain coal beds. Structural control is less signiflcant in localising gold ore, which is preferentially developed within a pervasively silicifled breccia which has been variously interpreted to be of sedimentary, karstic collapse or tectonic origin.

Hydrothermal alteration assemblages include quartz, kaolinite/dickite and mixed-layer illite-montmorillonite. Anatase of uncertain origin is abundant as is organic matter. Quartz veins occur in abundance in the high grade ore zones, accompanied by calcite, fluorite, pyrite and traces of arsenopyrite, stibnite and sphalerite. Realgar and cinnabar are also present in high-grade gold ore.

The Getang deposit has been reported to contain a resource of around 22 t of Au at grades of 6 g/t Au.

The most recent source geological information used to prepare this summary was dated: 2003.    
This description is a summary from published sources, the chief of which are listed below.
© Copyright Porter GeoConsultancy Pty Ltd.   Unauthorised copying, reproduction, storage or dissemination prohibited.

  References & Additional Information
   Selected References:
Hu, X., Gong, Y., Zeng, G., Zhang, Z., Wang, J. and Yao, S.,  2018 - Multistage pyrite in the Getang sediment-hosted disseminated gold deposit, southwestern Guizhou Province, China: Insights from textures and in situ chemical and sulfur isotopic analyses: in    Ore Geology Reviews   v.99, pp. 1-16.
Wilde A R  2003 - The Golden Triangle of southeast China: Another Carlin Trend ?: in    SEG Newsletter, Soc. Econ. Geol., Denver   No. 55, Oct 2003 pp 1, 9-12

Porter GeoConsultancy Pty Ltd (PorterGeo) provides access to this database at no charge.   It is largely based on scientific papers and reports in the public domain, and was current when the sources consulted were published.   While PorterGeo endeavour to ensure the information was accurate at the time of compilation and subsequent updating, PorterGeo takes no responsibility what-so-ever for inaccurate or out of date data, information or interpretations.

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