drilling commences at tambang hitam morehighgrade

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ASX ANNOUNCEMENT
17 October 2005
Drilling Commences at Tambang Hitam; More High
Grade Rock Chips
• Drilling Commences at Tambang Hitam
• Vein System Rock Chips to 20.45g/t Au
• Modelling Indicates Potential Bonanza Zone at Depth
Oropa is pleased to announce the commencement of diamond
drilling at its Tambang Hitam prospect, North Sumatra,
Indonesia.
Mapping and sampling within the 3km² prospect area has
identified a number of epithermal vein systems over a 500m
strike length, with gold grades up to 28.6g/t Au. Better values
from the latest batch of rock chip sampling of vein systems is
presented below in Table 1.
Table 1: Rock Chip Sampling, Tambang Hitam
Sample
No
Northing
(UTM)
Easting
(UTM)
Gold
ppm (g/t)
Silver
ppm
(g/t)
946904 67522 589887 3.76 23
946913 67485 589885 2.31 3
946917 67500 589885 2.97 40
946918 67477 589870 20.45 64
946919 67460 589866 6.67 33
946928 67361 589885 3.72 12
946929 67359 589883 2.53 7
946995 67528 589890 2.04 9
946996 67529 589890 2.21 8
946998 67530 589890 6.13 23
946999 67531 589890 4.45 17
RECENT ASX
ANNOUNCEMENTS
30 September 2005
Notice of General Meeting-
300905.doc
30 September 2005
High Grade Rock Chip Results
23 September 2005
Placement of Shares in Oropa
22 September 2005
Drilling to commence
CORPORATE
25 Charles Street
South Perth WA 6151
Ph: +61 8 9368 4544
Fax: +61 8 9368 4522
Email: [email protected]
www.oropa.com.au
ABN: 77 009 241 374
BOARD OF DIRECTORS
Brian Hurley– Chairman
Philip Christie– Director
Rod Murchison– Non-Executive
Director
Bruce Tomich- Non-Executive
Director
ASX Code: ORP
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2 www.oropa.com.au
Vein textures, gold grades and alteration assemblages
observed within the prospect indicate that outcropping
veins formed at relatively low temperatures, close to what
would have been the surface at the time of deposition.
Sample No. 946918 (20.45g/t Au) was collected from a
manganese rich brecciated zone, possibly indicating the
presence of bonanza grade material transported from
depth.
Bonanza or high grade zones are relatively common in this
style of mineralisation, generally forming in zones where
vein systems join at depth as shown in Figure 1. As
outcropping veins appear to have formed at shallow levels,
potential bonanza zones will occur below the current
surface topography and therefore make attractive drill
targets.
Drilling will target identified vein systems in a series of
holes to be completed over the next two months.
Yours faithfully,
OROPA LIMITED
PHILIP C CHRISTIE
Director
Encl.
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3 www.oropa.com.au
Figure 1. Tambang Hitam Alteration and Mineralisation Model
Sampling Area
Target Area