Sedimentary rock-hosted disseminated gold deposits (Carlin-type deposits) have recently been recognized in the People's Republic of China. Five deposits discovered in Guizhou Province, Yata, Getang, Sanchahe, Ceyang, and Banqi are described here for the first time in Western literature (Fig. 1). The deposits have geologic features and geochemical signatures that are remarkably similar to those of sedimentary rock-hosted precious metal deposits in the United States. The sizes of the deposits are as yet undetermined, but they each contain significant reserves at average grades of 4 to 5 g of gold per metric ton. Exploration and drilling are in progress at all of the deposits, and other areas where the geologic setting and geochemical anomalies are similar are being tested.

The deposits are located in a relatively inaccessible region in the southern part of the People's Republic of China. Four of the five deposits described in this report were visited in September 1986 as part of a cooperative study between the U. S. Geological Survey and the Ministry of Geology and Mineral Resources of the People's Republic of China. Transportation and logistical support for site visits were provided by the Bureau of Geology and Mineral Resources of Guizhou Province, the organization primarily responsible for mineral exploration in the region.

Very little has been published about sedimentary rock-hosted disseminated gold deposits in the People's Republic of China (Li et al., 1986). The Chinese literature sometimes refers to them as "underground hydrothermal (brine) leaching gold deposits" (Cai Changjin and Li Zhixiang, unpub. data, 1986). Analytical information from samples collected in the course of this study is available in Dean et al. (1988)

Micon International Limited (Micon) was retained in August, 2009 by Rusoro Mining Ltd.  (Rusoro) to complete a feasibility study for an expansion of the existing processing facility to permit treatment of 20,000 t/d of mainly hard rock from the Choco 10 and Increible 6 deposits. Exploration prior to 2009 had identified additional mineralised deposits and, in 2008, a preliminary assessment was conducted which examined the possibility of increasing the 5,000 t/d mill capacity (Buchanan et. al., 2009). A number of options were investigated and increasing the total plant throughput to 20,000 t/d was found to be the most economically viable.

This feasibility study evaluates the construction of additional processing facilities to treat material from the existing Choco 10 mine and the nearby Increible 6 property as an expansion of the existing Choco 10 plant. With the exception of the construction of a new tailings storage facility, the expanded facilities will be essentially located within the site of the existing Choco 10 operation and represent a brownfields expansion <...>

Wardell Armstrong International Limited (“WAI”) was commissioned by Lundin Mining Corporation (“Lundin”) to prepare an updated Technical Report in accordance with the disclosure requirements of Canadian Securities Administrators’ National Instrument 43-101, Standard of Disclosure of Mineral Projects (“NI 43-101”) to disclose recent information about the Neves-Corvo underground mine located on the Neves-Corvo integrated Mining Concession, and the surrounding Exploration Concession (collectively “Neves-Corvo”). This information has been derived from a Feasibility Study (“FS”) undertaken by Lundin on the Zinc Expansion Project (“ZEP”) at Neves-Corvo and includes anupdated Mineral Resource and Mineral Reserve estimate.