eluvium

Gold was won largely from shallow open-pits in gold-bearing eluvium, and from selective hard-rock mining of narrow sub-sinter quartz veins and stockworks.

The mining area has mainly slope quaternary modern products, and its eluvium and alluvium are located in the northwest end flap of Gukeng large anticline that plunges to the southwest direction.

Depth [m] Rock 0.0-1.5 Clay 1.5-7.0 Eluvium of the leucogranite 7.0-016.85 Weathered leucogranite 16.85-22.7 Alkali feldspar syenite 22.7-26.3 Alkali feldspar syenite with quartz 26.3--31.8 Leucogranite 31.8-32.8 Alkali feldspar syenite 32.8-37.5 Leucogranite 37.5-38.5 Alkali feldspar syenite 38.5-43.7 Leucogranite 43.7-44.7 Pegmatite 44.7-94.7 Leucogranite 94.7-95.15 Alkali feldspar syenite 95.15-100.4 Leucogranite 100.4-101.7 Alkali feldspar syenite 101.7-106.6 Leucogranite 106.6-107.4 Alkali feldspar syenite 107.4-119.5 Leucogranite 119.5-123.0 Granite with micas 123.00-126.0 Aplite 126.00-205.0 Li-topaz granite Table 2 The chemical composition of the rocks within the KZ-25 borehole (Hanak et al., 2010).

This location contains the thickest development of eluvium in the area, and a major objective was to establish in broad terms the volume of potential feed for the beneficiation plant.

(1) Detritus (adjective detrital) is a geological term used to describe particles of rock derived from pre-existing rock through processes of weathering and erosion.(2) Colluvium or colluvial deposits is the name for loose bodies of sediment that have been deposited or built up at the bottom of a low-grade slope or against a barrier on that slope, transported by gravity.(3) Eluvium or eluvial deposits are those geological deposits and soils that are derived by in situ weathering or weathering plus gravitational movement or accumulation.(4) A pisolite is a sedimentary rock formed from pisoliths.