Leading the Way


Far City Mining hired the Geophysical Exploration Team of Sichuan Bureau of Geology and Mineral Prospecting and Development (SBGMPD) to conduct the general exploration program of the Jiaogenma mining area. The work included prospecting, geology, ground geophysics, soil and rock sampling, geochemistry, rock analysis, diamond drilling and trenching.

The following table shows the work done for years 2009 and 2010:

Far City Mining Limited – Jiaogenma Sn-Zn Project
Work Item Work
Unit QTY
A. Terrain Mapping    
1. Control surveying (GPS) Point 12
2. Engineering survey Point 398
3. 1:2,000 topographic survey km² 4.05
1:10,000 topographic survey km² 5.9
5. 1:1,000 topographic survey of line profiles Km 47.16
B. Geological Survey    
1. 1:2,000 geological survey km² 2.3
2. 1:10,000 geological survey km² 5.9
3. 1:1,000 geological survey of line profiles Km 19.5
4. 1:10,000 hydro-geological survey km² 10
5. 1:10,000 geological survey km² 10
6. 1:10,000 environmental geological survey km² 10
7. Long-term monitoring of hydrogeological points Point 3
C. Geophysical and Geochemical Prospecting    
1. 1:10,000 magnetic survey(80 m x 20 m) km² 3.5
2. IP intermediate gradient coverage (80 m x 20m) km² 2.25
3. Layout of survey grid (80 m x 20 m) km² 3.5
4. IP sounding Point 41
5. 1:10,000 soil survey(80 m x 20m) km² 1.83
6. Layout of soil survey grid(80 m x 20m) km² 1.83
D. Diamond Drilling (6 DDH, 401 core samples assayed) 6 Core holes 1,579.15
E Re-mapping old Adits (401 Samples) m 2284.7
F. Trenches (50 Trenches) 3,194.06
G. Rock Analysis    
1. Rock analysis Zn, Sn, Ag, Pb Piece 1,050
2. Geochemical soil analysis Cu, Pb, Zn, Ag, Sn, As, Sb, Hg Samples 1,544
3. Thin section Piece 70
4. Polished section Piece 2
5. Samples for density 45 samples for each of three main zones of mineralization Section 4


The geological surveys at 1:1,000 scale, on lines 400 m apart over Zone 1, Zone 2 and Zone 3 provided geological information about the strata, structure and metamorphic rocks. In addition, the entire property was mapped at 1:10,000 scale and Zone 2 at 1:2,000 scale in 2009.


The magnetic and induced polarization (IP) surveys are at Zone I and part of Zone 2. These surveys trace the northern and southern extensions of the mineralized zones defined in Zone 2. There are five magnetic anomalies, M1 to M5, in the north area and 11 magnetic anomalies, M1 to M11, defined in the south area. In 2010, additional magnetic surveys were completed in the southern area. The magnetic anomalies seem to show the extension of the fracture zones under the Quaternary sediments where there are no geochemical anomalies.


In 2009, the 1:10,000 scale soil survey covering 1.83 km² was completed over Zone 3. In this survey, 1,400 samples were collected and a large number of polymetallic anomalies were found. Tin anomalies were found in the north and south west parts of the area. The anomalies cover large areas have a high peak value and are associated with zinc and silver anomalies. The geology in these anomalous areas is similar to that hosting the tin mineralization in Zone 2.


In 2009, a total of 35 (1,398.95 m³) exploratory trenches were constructed and cleared and 15 (1,803.11 m³) exploratory trenches were dug in 2010. In 2009, 248 channel samples were taken from the trenches and assayed for tin, zinc and silver. In 2010, 144 channel samples, from the trenches, were assayed for tin, zinc and lead.

Trenches were dug at right angles to the fracture zones. The mineralization exposure by the trenches is good. For the hand trenches, the trench width is based on a depth of 1.5 m. The trench will penetrate about 0.2 m into the bedrock. The start and finish point locations are measured with a GPS. The channel sample is taken when the lithology changes or mineralization is observed. The channel sample is usually 10 cm x 3 cm and about 2.00 m long.


In 2009, 18 prospecting tunnels numbered LD1 to LD16, LD19 and LD20, that had been left uncompleted by previous contractors, were cleared up, mapped and sampled. This totalled 2,284.7 m of tunnel. Sampling consisted of 401 samples and highest values of tin, silver and zinc samples are 5.64%, 36.3 g/t and 5.96% respectively.


Drilling was subcontracted by SBGMPD to the Chengdu Geological Engineering Investigation Institute who performed the drilling, core logging, core sampling and technical management. Six drill holes were drilled in 2009. The total length of drill holes is about 1,579.15 m and a total of 373 drill core samples were collected for assay.