The Jiama Project is located within the Gangdese Yanshanian epi-continental arc on the central southern portion of the Gangdese-Nianqing Tanggula Terrain. At the tenement scale, rock types are typically passive epi-continental clastics and carbonates. The stratigraphy is dominated by marbles and limestones of the Upper Jurassic Duodigou Formation and sandstones, slates and hornfels belonging to the Lower Cretaceous Linbuzong Formation. Although some mafic and intermediate to felsic dykes have been mapped in outcrop and drill core, the intrusive granitic body responsible for the wide spread contact metamorphism and copper-polymetallic mineralisation is yet to be identified. A number of thrust faults and shears concentrated between major geological contacts and a large detachment fault (Gliding Nappe Fault) have also been observed. Locally bedrock units are overlain by unconsolidated Quaternary colluvium and alluvium.

The Jiama deposit is a structurally controlled stratiform skarn-type copper-polymetallic system. The majority of high grade mineralisation is associated with shear zone contacts between the Duodigou and Linbuzong formations and shear related folding. The zone of mineralisation within fault hosted skarn alteration measures kilometres in both strike and dip and remains open at depth to the northeast.

Mineralisation is also associated with granite porphyry dykes intruding the ‘Duodigou Marble’ and observed within the overlying hornfels of the L ........

Conventional mining methods have been proposed for the open pit and underground operations.

The reserve estimate for the Jiama Project underground mine is based on a combination of Sub Level Open Stoping with Paste fill, Room and Pillar and Cut and Fill.

China Gold currently mine the Jiama deposit as an open pit and underground mine and intend to continue and expand both operations. The Jiama underground workings are currently accessed via declines and adits, with future plans to include a conveyor drive for ore haulage, vertical shaft for waste haulage and decline expansion for improved access. The current mining activity is limited to hand-held air leg mining for both development and stoping.

Conventional selective mining methods using truck and shovel are planned to be employed to extract the mineralised material from the proposed open pits. Mining is planned to occur on shallow flitches, typically 3m to 4m high, which will enable better grade control of the mineralised zones.

The open pits are the Jiaoyan and South Pit. The Jiaoyan pit will be mined in two stages and South pit four stages.

Mining of Phase II will commence in two open pits and an extensive underground mine including; Jiaoyan Pit, South Pit and the underground mine respectively. The open pits and underground expansion will be developed simultaneously. The Open pits will be separated from the underground operation by a crown pillar that will be maintai ........

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