Overview
BYC Gold Project
Changkeng Gold Project
Xiaoshan Gold Project
Gobi Gold Project
Gold Bull Mountain
Yangshan Gold Belt
White Silver Mountain Spin-Off
43-101 Technical Reports

Show printable version of 'Changkeng Gold Project' item in a New WindowEmail 'Changkeng Gold Project' item to a friend




Location

The Changkeng gold deposit is located approximately 45 km southwest of Guangzhou, the fourth largest city in China with 13 million people and the capital city of Guangdong Province. The project is adjacent to Minco Silver Corporation's world-class Fuwan Silver deposit and situated close to well established water, power, and transportation infrastructure.

Work Program
  • 15,000 metres of infill drilling.
  • Upgrade the resource.
  • Advance project to feasibility study stage.

Ownership

Guangzhou Minzhong Mining Co., Ltd. ("Minzhong"), a cooperative joint-venture established among Minco Mining (China) Co., Ltd. ("Minco China"), Guangdong Geological Exploration Corporation ("GGEC"), and two private Chinese companies to jointly explore and develop the Changkeng Gold Property, has signed a purchase agreement to buy a 100% interest in the exploration permit (the "Changkeng Exploration Permit") on the Changkeng Gold Property from 757 Geo-Exploration Team of Guangdong Geological Exploration Bureau ("757 Exploration Team"). Total purchase price (the "Purchase Price") has been appraised to be RMB 49 million (approx. US $6.8 million), payable in three installments within two years. The Ministry of Land and Resources of China has approved the Purchase Price and the transfer of the Changkeng Exploration Permit from 757 Exploration Team to Minzhong.

Under the terms of the agreement, Minco China, a wholly owned subsidiary of Minco Gold, has the right to earn a 51% equity interest in Changkeng with a total contribution of RMB 51 million (approx. US $7.1 million). The other shareholders will contribute RMB 49 million (approx. US $6.8 million) for their 49% equity interest in Minzhong.

Background


click to enlarge
Gold was discovered at Changkeng in early 1990 by systematic follow up of stream sediment and soil geochemical anomalies identified from surveys completed by the Guangdong Provincial government. Illegal, small scale mining began in 1991 and removed most of the oxidized, near surface mineralization.

click to enlarge
Based on 13 surface trenches and 81 diamond drill holes, P&E Mining Consultants Inc. ("P&E") of Brampton, Ontario, prepared an initial NI 43-101 compliant resource estimate on the deposit in March of 2008. The current resources residing on the Changkeng deposit include 379,000 ounces gold indicated and 333,400 ounces gold inferred. The detailed resource estimate is provided below.


Geology and Mineralization

The Changkeng-Fuwan gold and silver deposits occur within the Sanzhou basin, which is a triangular-shaped, Upper Paleozoic fault-bounded basin. Upper Paleozoic and Mesozoic sedimentary units are folded into an open syncline with a northeast-trending axis. A shallow dipping fault zone developed near the unconformity separating Lower Carboniferous limestone and Upper Triassic clastic sedimentary units hosts the gold and silver deposits at Changkeng and Fuwan.

click to enlarge
The Changkeng gold mineralization occurs as lenses of brecciated and silicified Triassic clastic rock. Barite, fluorite, carbonate and pyrite are associated with the mineralized zones. Two gold-bearing mineralized zones are exposed at surface and merge at depth and along strike to the northeast. Zone 1 has a strike length of 747 metres and ranges in width from 1 to 39.26 metres. Zone 2 has a strike length of 134 metres and ranges in width from 3.55 to 11.47 metres. The deposit is open to the east, south and down-dip from the outcropping mineralization and provides an opportunity to significantly increase the resources for the deposit.

Resource Estimate

An independent resource estimate was calculated by P&E and released on March 12, 2008. The estimate contains an indicated resource of 2.1 million tonnes @ 5.61 g/t gold (Au) for a total of 379,000 oz Au and an inferred resource of 2.2 million tonnes @ 4.82 g/t Au for a total of 333,400 oz Au. The Changkeng deposit remains open along strike to the northeast and southwest.

Details of the resources residing on the Changkeng Deposit are shown in Table 1.
Table 1:  Resource Estimate @ 1.5 g/t AuEq(ii) Cut-Off Grade.
-----------------------------------------------------------------------
                                                         AuEq     AuEq
                            Au       Au    Ag       Ag    (ii)     (ii)
Classification    Tonnes  (g/t)     (oz) (g/t)     (oz)  (g/t)     (oz)
-----------------------------------------------------------------------
Indicated      2,101,000  5.61  379,000  10.7  723,000   5.81  392,100
-----------------------------------------------------------------------
Inferred       2,152,000  4.82  333,400   9.3  643,000   4.99  345,100
-----------------------------------------------------------------------

(ii) The AuEq grade was calculated from metal prices of Au US$650/oz
     and Ag US$12.50/oz with respective recoveries of 95% and 90%. The
     calculated Au:Ag ratio was 55:1.
The mineral resources were estimated using the Canadian Institute of Mining, Metallurgy and Petroleum (CIM), CIM Standards on Mineral Resources and Reserves, Definitions and Guidelines prepared by the CIM Standing Committee on Reserve Definitions and adopted by CIM Council December 11, 2005.

The purpose of this resource estimate was to:
  • Take into consideration Minco Gold's recently completed 6 drill holes.
  • Estimate gold resources that reflect Minco Gold's current exploration permit holdings on the Changkeng property.
  • Identify areas where inferred resources can be upgraded to indicated with additional drilling.
  • Identify areas where the resource can be expanded.

Drilling Results

Minco completed a limited drilling program at Changkeng in October 2004,

click to enlarge
confirming the results from previous Chinese drilling and the continuity of the Zone 1. All the holes were drilled vertically and true widths of the intersections have not yet been established. The holes are drilled on a northwest-southeast grid approximating the dip direction of the mineralized zone.


Table 2: Assay results from diamond drill holes completed by Minco in 2004

In late 2007, 6 holes were drilled to expand and confirm the mineralization on the Changkeng gold deposit. Significant gold results of the drilling are as follows and the complete results are listed in Table 3 below:
  • CK2006 5.788 g/t Au over 12.62 metres (m)
  • CK2007 5.54 g/t Au over 8.0 m
  • CK2010 7.83 g/t Au over 26.81 m, including 12.23 g/t Au over 14.81 m
Table 3: 
-----------------------------------------------------------------------
                                                     Average Grade
                              Intercept   -----------------------------
Hole       From        To         (i)      Au       Ag      Pb      Zn
No.          (m)       (m)        (m)    (g/t)    (g/t)     (%)     (%)
-----------------------------------------------------------------------
CK 2002  184.42    188.30       3.88     0.18   152.37    0.03    0.07
         --------------------------------------------------------------
         205.40    213.30       7.90     0.16   264.55    0.13    0.25
-----------------------------------------------------------------------
CK2005    99.82    101.81       1.99     1.58      4.6     n/a     n/a
-----------------------------------------------------------------------
CK2006   121.11    133.73      12.62    5.788    40.51     n/a     n/a
-----------------------------------------------------------------------
CK2007   114.81    116.81       2.00     1.12       78     n/a     n/a
         --------------------------------------------------------------
         122.45    130.45       8.00     5.54      5.7     n/a     n/a
-----------------------------------------------------------------------
CK2009    65.44     66.48       1.04     1.03       46     n/a     n/a
-----------------------------------------------------------------------
CK2010   153.12    179.93      26.81     7.83      5.7     n/a     n/a
         --------------------------------------------------------------
         including
         --------------------------------------------------------------
         159.12    173.93      14.81    12.23    14.81     n/a     n/a
-----------------------------------------------------------------------
(i) True widths for the mineralized zones are typically from 75% to 95% 
    of the stated intercepts.



2004 Changkeng Site Visit
click to enlarge