Dong Mao Huo Results
June 05 2008 - 2:15AM
UK Regulatory
Central China Goldfields plc
("GGG" or "the Company")
DONG MAO HUO TRENCH AND PIT SAMPLING RESULTS
LONDON - 5 JUNE 2008 - Following the announcement of 12 March 2008, Central
China Goldfields plc (AIM: GGG) is pleased to report the results from the
recent surface detailed re-mapping, pit and trench sampling programme conducted
at the Dong Mao Huo gold project.
Highlights:
* Surface gold oxide mineralisation from trenching and pit sampling confirms
mineralisation at West Hill and extends to additional new area at the East
Hill on the Main Zone
* Trench CT02 in the West Hill intersected two gold-rich zones of 7 metres @
0.94 gramme per tonne gold ("g/t Au") and 2.93 g/t silver ("Ag") (including
3 metres @ 1.83 g/t Au and 3.50 g/t Ag), and 13.5 metres @ 0.43 g/t Au and
1.98 g/t Ag (including 2 metres @ 1.06 g/t Au and 1.05 g/t Ag)
* Trench CT14 in the East Hill returned three gold-rich zones of 8 metres @
2.26 g/t Au (with a high of 8.19 g/t Au), 1 metre @ 3.83 g/t Au and 12
metres @ 0.72 g/t Au (with a high of 5.64 g/t Au)
* Oxide mineralisation appears to be related to North-South trending breccias
associated with abundant iron and manganese oxides which at depth appear to
contain high-grade gold and base metal values (announcement of 28 January
2008)
* Further reverse circulation ("RC") drilling is now in progress and the
majority of these holes are targeting these North-South trending breccias
Jeff Malaihollo, Managing Director of Central China Goldfields, comments:
"The results from the East Hill are particularly pleasing, as this is an area
that has not been tested in detail before. Surface and pit sampling here
indicate the area's potential to host a low-grade open pit oxide deposit over
an area of 180 m x 60 m. The results from the West Hill further confirm this
area's potential for an open-pit oxide gold deposit. Furthermore, detailed
re-mapping has identified the presence of North-South trending brecciated
bodies, which may be the source of the gold. The ongoing drilling programme is
designed to test the continuity of these breccias."
GEOLOGICAL DETAILS:
A programme of recent surface geological re-mapping, trench and pit sampling at
the Main Zone (West and East Hills) was undertaken in March and April 2008
focusing on the existing open pits, adits and exposed and new trenches. A total
of 447 channel samples and some rock chip samples were taken at approximately 1
metre intervals in the oxidised host rocks. In addition, the existing heap
leach pads were also systematically sampled using an excavator.
West Hill
Trench CT02 intercepted two gold-rich zones in the oxidized rhyodacite breccia.
The first one is 7 metres @ 0.94 g/t Au and 2.93 g/t Ag, including 3 metres @
1.83 g/t Au and 3.50 g/t Ag. The second one is 13.5 metres @ 0.43 g/t Au and
1.98 g/t Ag, including 2 metres @ 1.06 g/t Au and 1.05 g/t Ag. There are two
more smaller, 3 to 4 metre-wide, gold-bearing zones averaging about 0.4 g/t Au.
Trench CT01A contained some supergene gold in the diorite schist wallrocks.
Three zones were encountered. The best two zones are 3 metres @ 0.84 g/t Au and
0.53 g/t Ag; and 1.7 metre @ 0.72 g/t Au and 1.06 g/t Ag.
Bedrock was not reached in Trench CT01B. The dump material covering the trench
was sampled and returned 3.63 metres @ 0.62 g/t Au and 1.07 g/t Ag, including
1.63 metres @ 1.08 g/t Au and 1.21 g/t Ag.
Trenches CT03 and CT15 encountered sporadic anomalous Au ranging from 1 to 3
metres @ 0.1 -0.3 g/t Au.
East Hill
At the East Hill of the Main Zone, Trench CT14 was dug along the east-west
ridge of the hill exposing predominantly rhyodacite breccia, stained by iron,
manganese and occasionally, copper oxide.
The trench intersected three high-grade mineralised zones. These are 8 metres @
2.26 g/t Au (including 5 metres @ 5.77 g/t Au and a high of 8.19 g/t Au), 1
metre @ 3.83 g/t Au and 12 metres @ 0.72 g/t Au (with a high of 5.64 g/t Au).
Two more 4 to 8 metre anomalous zones returned 0.1 to 0.3 g/t Au.
Table 1. Summary of significant trench assay results
Location Trench Width (m) Au g/t Ag g/t Comments
West Hill CT01A 3 0.84 0.53
Incl. 1 1.33 0.50
9 0.23 0.67
1.7 0.72 1.06
CT01B 3.63 0.62 1.07 Dump Material
Incl. 1.63 1.08 1.21
CT02 3 0.41 2.84
7 0.94 2.93
Incl. 3 1.83 3.50
2 0.40 1.20
13.5 0.62 1.07
Incl. 2 1.06 1.05
East Hill CT14 1 0.48 0.60
1 0.47 0.70
8 2.26 0.41
Incl. 5 5.77 0.35
1 3.83 0.70
12 0.72 0.36
Incl. 1 5.64 0.20
4 0.27 1.56
Detailed Mapping and Pit Sampling
Detailed geological re-mapping, at 1:500 and 1:1000 scale, and rock sampling
was done over the West and East Hills. Channel sampling was done at old adits
and trenches whilst selective rock chip sampling was done at the old pits. The
mapping shows that mineralisation in the rhyodacite breccia host rock is
related to North-South trending zones containing closely to widely spaced iron
and manganese oxide-rich hydraulically emplaced fractures and hydrothermal
breccias. The oxides reflect the oxidation of sulphide minerals consisting
mainly of pyrite, chalcopyrite, sphalerite and chalcocite.
At the West Hill, assay results of the eight rock chip samples taken from Pit 1
returned up to 4.43 g/t Au and 5.1 g/t Ag with four samples returning values of
over 1 g/t Au. Five rock chip samples from Pit 2 ranged from 0.05 to 1.04 g/t
Au and 0.6 to 1.7 g/t Ag.
At the East Hill, geological mapping and the channel sampling gathered
encouraging results. Strongly oxidised rhyodacite was observed widespread from
the pits, adits, test pits and old trench workings around the East Hill. It is
composed of limonite, haematite, goethite and manganese oxide assemblage.
Malachite was also noted in places.
Assay results of the channel samples collected range from
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