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The region surrounding Jinfeng is highly prospective for further discoveries of multi-million ounce gold deposits. Sino Gold has a very large tenement position in the region and many promising prospects are yet to be tested by drilling.
Regional Geology
The Jinfeng project lies within China’s Golden Triangle, a sedimentary basin overlying broadly folded carbonate rocks thrust over basement sequences.
Gold mineralisation in the Golden Triangle (including Jinfeng) shares many of the distinct geological characteristics of the Carlin deposits in Nevada, USA.
Numerous gold deposits have been discovered in the area, and several have reported gold resources in excess of one million ounces. Most gold deposits in the Golden Triangle are located within tightly folded sedimentary sequences of Triassic age, adjacent to or along the unconformity with the underlying Permian carbonates. Gold mineralisation is localised along cross-cutting faults, forming generally lenticular to anastomosing orebodies within the confines of the fault structures.
Mine Geology
Jinfeng, the largest known Carlin-type deposit in China, lies within Triassic sedimentary rocks overlying the Permian and Carboniferous limestones of the Laizhishan Dome.
The Jinfeng orebody is a structurally controlled gold deposit with some replacement style mineralisation. The majority of the mineralisation is hosted by the major east-southeast trending high-angle F3 Fault which is consistently mineralised over 1,300 metres of strike and to a depth of more than 1,000 metres.
The F3 Fault is linked to the major low-angle thrust fault (F7). To the west, the F3 Fault is terminated by the northeast-trending F2 Fault, which is weakly mineralised. Gold mineralisation continues northwest of the F2 into the Rongban area, similarly hosted by a series of high-angle faults and the F7 Fault.
Northeast-trending folding of the F3 and the intersection of the F3 and the F7 has focused high-grade mineralisation, which plunges east-southeast.
Drilling during 2007 extended known mineralisation significantly down-plunge and brought the diamond drilling completed at Jinfeng to January 2008 to a total of approximately 150km.
An updated Mineral Resource estimate totalling 5.3 million ounces was released in April 2008 and the assay results of the 53 diamond drill holes drilled during 2007 are available for download by clicking here.
The Jinfeng deposit remains open down-dip and down-plunge to the east-southeast, as well as in the Rongban area to the northwest.
The exploration potential of the mine area and surrounding district is excellent, with a high likelihood for further expansion of the resource and repetitions within the district.
Sino Gold has entered into three joint ventures in the Jinfeng region, covering an extensive area of more than 400 square kilometres around the Laizhishan Dome. Exploration is primarily aimed at prospect definition work near the faulted contact between the Permian limestone and overlying Triassic clastic sediments, which is considered very prospective for Carlin-style gold mineralisation similar to Jinfeng. Numerous areas along the dome contact have already been identified by strong gold-arsenic soil and stream geochemistry anomalies, trenching and/or small-scale oxide gold mines that are to be investigated further. |
Jinfeng Exploration - Joint Ventures |
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Sino Gold plans to continue exploring the prospective district surrounding Jinfeng.
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