high grade mineralisation discovered at tambang

ASX ANNOUNCEMENT
19 September 2006
__________________________________________________
HIGHLIGHTS
�� Access gained to historical Dutch underground workings
�� Channel sampling of access drives discovers high grade
gold values in association with copper mineralisation:
Sample 951270: 7.43g/t Au, 0.64% Cu
Sample 951271: 20.55g/t Au, 0.49% Cu
Sample 951275: 19.85g/t Au, 0.85% Cu
Sample 951276: 13.6g/t Au, 1.29% Cu
�� Ore body modelling indicates mineralisation open down dip
and plunge, plus possible parallel ore lenses
�� Drilling to commence this quarter
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Oropa is pleased to announce results from initial limited
sampling of historical Dutch underground workings at its
Tambang Ubi prospect, North Sumatra, Indonesia.
Tambang Ubi is a garnet – epidote skarn deposit developed on
the contact between footwall limestone and hanging wall
granodiorite and andesite intrusive bodies. The mining of the
deposit by the Dutch Moeara Sipongi Mining Company
commenced in the late 1930’s, producing approximately
100,000t of ore, with recovered grades of 6.2g/t Au, 2.77g/t Ag
and 0.24% Cu. Mining ceased in 1939 due to the
commencement of WW2.
Historical sections and mine plans were sourced and digitized
by Oropa in conjunction with the completion of access
negotiations with local miners still exploiting gold / copper
mineralisation in the area. A number of access drives were
refurbished to allow for safe entry.
Modelling clearly shows the areas actively stoped during the
last year of Dutch mining operations and that stoping did not
continue far below the current water table. Historical records
indicate that mineralisation remains open at depth in both a
down–dip and down plunge direction.
RECENT PUNGKUT PROJECT
ANNOUNCEMENTS
18 September 2006
Sambung Exploration Update
31 July 2006
June 2006 Quarterly Report
24 July 2006
High Grade Silver Discovery at Sihayo 1
North
3 July 2006
More Gold Discovered at Sambung
27 June 2006
More Significant Drill Intersections at
Sambung Prospect
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
Phillip Christie- Director
Rod Murchison- Non-Executive
Director
Bruce Tomich Non Executive
Director
HIGH GRADE MINERALISATION DISCOVERED AT TAMBANG UBI
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2 www.oropa.com.au
Sampling of underground workings was limited to those access drives already
refurbished and deemed safe for entry. During the mapping of access drives, Oropa
geologists recognised repetitions of the contact skarn mineralisation exploited by
Dutch miners elsewhere in the ore body. Channel sampling of skarn zones returned
high grade gold values in association with copper mineralisation. These zones were
not exploited by Dutch miners and may represent parallel zones of mineralisation to
the main contact previously mined by the Dutch (red areas in figure 1).
Oropa has completed programmes of gridding, mapping and a ground magnetic
survey over the Tambang Ubi area in preparation for drilling this coming quarter.
Table 1: Tambang Ubi Rock Chip Description and Assays
Sample Northing Easting Type Width Sample Description Au
ppm
Cu %
951269 68597 589647 OC Chip Grey recrystallised limestone skarn with
malachite / hematite staining
0.06 0.00%
951270 68608 589611 OC Chip Grey recrystallised limestone skarn with
malachite / hematite staining,
chalcopyrite, pyrite.
7.43 0.64%
951271 68595 589658 OC Chip Contact between porphyritic andesite
and recrystallised limestone skarn, with
malachite, pyrite, and chalcopyrite.
20.55 0.49%
951272 68588 589658 CH 3m Contact between porphyritic andesite
and recrystallised limestone skarn, with
malachite, pyrite, and chalcopyrite.
1.59 0.60%
951273 68573 589827 CH 3m Porphyritic andesite with pyrite and
chalcopyrite (oxidised)
0.01 0.01%
951274 68583 589765 CH 3m Contact between porphyritic andesite
and recrystallised limestone skarn, with
malachite, pyrite, and chalcopyrite.
0.47 0.77%
951275 68610 589619 CH 3m Grey recrystallised limestone skarn with
malachite / hematite staining
19.85 0.85%
951276 68613 589625 CH 3m Grey recrystallised limestone skarn with
malachite / hematite / azurite staining
13.6 1.29%
951277 68972 589678 CH 3m Contact between porphyritic andesite
and recrystallised limestone skarn, with
malachite, pyrite, and chalcopyrite.
0.09 0.06%
951278 68968 589679 CH 3m Porphyritic andesite with malachite,
chalcopyrite, pyrite
3.33 0.28%
951279 68995 589660 CH 3m Porphyritic andesite with malachite,
chalcopyrite, pyrite
11.7 0.78%
951280 68864 588683 CH 2m Contact between porphyritic andesite
and recrystallised limestone skarn, with
malachite, pyrite, and chalcopyrite.
7.85 1.70%
Notes
1. Au analysis determined by 50gm fire assay
2. Cu analysis determined by 50gm AAS
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3 www.oropa.com.au
Figure 1: Historical Dutch underground workings with stoped areas (red) and recent rock channel
sampling assays.
Yours faithfully
OROPA LIMITED
PHILIP C CHRISTIE
Director
Note1: It is advised that in accordance with the Australian Stock Exchange Limited Listing Rule 5.6, the
information in this report that relates to Exploration Results is based on information compiled by Mr. Jim
Kerr, who is a Member of the Australasian Institute of Mining and Metallurgy. Mr. Kerr is a full time
employee of Oropa Limited and has sufficient experience which is relevant to the style of mineralisation
and type of deposit which is under consideration and to the activity which he is undertaking to qualify as a
Competent Person as defined in the 2004 Edition of the “Australasian Code for Reporting of Exploration
Results, Mineral Resources and Ore Reserves”. Mr. Jim Kerr consents to the inclusion in this report of the
matters based on his information in the form and context in which it appears.
Note 2: All statements in this report, other than statements of historical facts that address future timings, activities,
events and developments that the Company expects, are forward looking statements. Although Oropa Ltd,
its subsidiaries, officers and consultants believe the expectations expressed in such forward looking
statements are based on reasonable expectations, investors are cautioned that such statements are not
guarantees of future performance and actual results or developments may differ materially from those in
the forward looking statements. Factors that could cause actual results to differ materially from forward
looking statements include, amongst other things commodity prices, continued availability of capital and
financing, timing and receipt of environmental and other regulatory approvals, and general economic,
market or business conditions.