ORIENTAL MINERALS INITIAL DRILL RESULTS FROM SANGDONG
Vancouver, BC, March 1, 2007 – Oriental Minerals Inc. (OTL:TSX‐V) is very
pleased to announce the drill results received from the Company’s first drill
hole at the Sangdong tungsten‐molybdenum project in South Korea.
Highlights from SD‐01 include an interval grading 2.37% tungsten oxide
(WO3), 0.12% molybdenum with 0.34 g/t gold, 0.02% tin and 0.15% bismuth
over 6 metres. The initial results indicate mineralization disseminated much
more broadly than reported historically and with significant grades occurring
almost 70 metres closer to surface than the old mine workings. This has very
significant implications, both in terms of the amount of mineralization and
the choice of a future mining method as this former tungsten mine continues
to be assessed by Oriental Minerals. Other significant results from the upper
portion of hole SD‐01 include:
Intersection
Thickness
Depth WO3
(%)
Mo
(%)
Sn (%) Au
(g/t)
Bi (%) Formation
15 metres 145‐160m 0.04 0.10 0.04 0.03 Sedimentary Breccia
7 metres 160‐167m 0.14 0.07 0.15 0.05 Sedimentary Breccia
4 metres 167‐171m 0.03 0.01 0.09 0.02 0.04 Sedimentary Breccia
22 metres 171‐193m 0.87 0.11 0.02 0.14 0.08 Breccia‐Skarn contact
Including 6m 179‐185m 2.37 0.12 0.02 0.34 0.15 same
4 metres 193‐197m 0.02 0.01 Cut & Fill Stope
2 metres 197‐199m 0.14 0.59 0.02 Skarn
7 metres 199‐205m 0.01 0.02 Cut & Fill Stope
7 metres 205‐212m 0.29 0.08 0.12 0.04 Skarn
The intersections closely correlate with bedding concordant quartz‐scheelite veins and as such represent near true width
intersections.
The mineralization intersected between 171 to 193 m is considerably higher in grade than the average historicallyreported
tungsten resource grade of 0.5% WO3 at Sangdong and is at much shallower depths than the 6‐metre thick Main
Vein mineralization (intersected between 248‐250.6m in SD‐01) previously mined by the Korean Tungsten Co., Ltd during
1947‐1992.
Intersection
Thickness
Depth WO3
(%)
Mo
(%)
Sn (%) Au
(g/t)
Bi (%) Formation
15 metres 145‐160m 0.04 0.10 0.04 0.03 Sedimentary Breccia
7 metres 160‐167m 0.14 0.07 0.15 0.05 Sedimentary Breccia
4 metres 167‐171m 0.03 0.01 0.09 0.02 0.04 Sedimentary Breccia
22 metres 171‐193m 0.87 0.11 0.02 0.14 0.08 Breccia‐Skarn contact
Including 6m 179‐185m 2.37 0.12 0.02 0.34 0.15 same
4 metres 193‐197m 0.02 0.01 Cut & Fill Stope
2 metres 197‐199m 0.14 0.59 0.02 Skarn
7 metres 199‐205m 0.01 0.02 Cut & Fill Stope
7 metres 205‐212m 0.29 0.08 0.12 0.04 Skarn
The intersections closely correlate with bedding concordant quartz‐scheelite veins and as such represent near true width
intersections.
The mineralization intersected between 171 to 193 m is considerably higher in grade than the average historicallyreported
tungsten resource grade of 0.5% WO3 at Sangdong and is at much shallower depths than the 6‐metre thick Main
Vein mineralization (intersected between 248‐250.6m in SD‐01) previously mined by the Korean Tungsten Co., Ltd during
1947‐1992.
Within the overlying Pungchon Limestone, a 4‐metre interval between 53 and 57 m returned 52 g/t silver, 0.53% copper,
0.52% zinc and 154 ppm bismuth. This new discovery of near‐surface mineralization reinforces results from surface
sampling reported on February 7, 2007. This mineralization is associated with structurally‐controlled carbonate vein
breccias and hematite alteration in the Pungchon Limestone, which was previously regarded as waste.
Cut and fill stope workings separate the lower 193 ‐ 197 m and 199 ‐ 205 m mineralized intersections. It is believed these
workings represent stopes that partially extracted the Hangingwall Vein. These workings produced most of the delays
encountered in the drilling of SD‐01, requiring significant cement grouting and re‐drilling to pass through the stope.
Drilling operations continue at Sangdong, with hole SD‐02 currently at 106 metres depth and targeted to 640 metres. Drill
hole SD‐03 is currently at 25 metres and targeted to 320 metres depth. A third rig is on site and should commence drilling
shortly.
SD‐01 intersected the following lithological units in sequence:
0‐144m. Pungchon Limestone.
144‐182m. Basal sedimentary breccia of the Pungchon Limestone. Minor quartz‐scheelite vein stockwork.
182‐309.6m. Quartz‐scheelite vein stockworks in skarn altered Myobong Slate.
309.6‐417m. Jangsan Quartzite with quartz‐molybdenum vein stockwork.
417‐435m. Intense brecciated Jangsan Quartzite with quartz‐molybdenum vein stockwork.
435‐459m. Jangsan Quartzite with quartz‐molybdenum vein stockwork.
459‐541m. Intense brecciated Jangsan Quartzite with quartz‐molybdenum vein stockwork.
541‐692.5m. Jangsan Quartzite with quartz‐molybdenum vein stockwork.
692.5‐781m. Taebeksan Series schist with quartz‐molybdenum vein stockwork.
Oriental Minerals is awaiting results from the remainder of the Mybong Slate intercepts and all of the quartzmolybdenum
stockwork mineralization logged in the lower 471 metres of hole SD‐01.
Note: Samples are 1‐metre split HQ core samples and were submitted to ALS Chemex laboratory in Brisbane, Australia
and analyzed by Ore Grade Method XRF‐ME05, Au‐AA21, ME‐ICP41s and Ag‐OG46. Quality Control: Blanks and
Standards samples were routinely inserted with the drill samples at random intervals. Analysis of Standards indicates the
laboratory results are all within ±5% of certified assays and so results are considered reliable. Blank samples were
generally clean as expected, although one blank sample inserted at the high grade zone reported minor contamination of
W and Mo.
QUALIFIED PERSON
The qualified person for the purposes of this release is Mr. Mark Dugmore.
On behalf of the Board of Directors,
Damien Reynolds
Chairman and Director
For more information:
Anna Dalaire
(604) 681‐5755
adalaire@orientalminerals.com
www.orientalminerals.com
Statements in this news release, other than purely historical information, including statements relating to the Company’s future plans
and objectives or expected results, constitute Forward‐looking statements. Such statements are based on numerous assumptions and
are subject to all the risks and uncertainties inherent in the Company’s business, including risks related to mineral exploration and
development. Consequently, actual results may vary materially from those described in the forward‐looking statements.
The TSX Venture Exchange does not accept responsibility for the adequacy or accuracy of this release.
Gruß
Vancouver, BC, March 1, 2007 – Oriental Minerals Inc. (OTL:TSX‐V) is very
pleased to announce the drill results received from the Company’s first drill
hole at the Sangdong tungsten‐molybdenum project in South Korea.
Highlights from SD‐01 include an interval grading 2.37% tungsten oxide
(WO3), 0.12% molybdenum with 0.34 g/t gold, 0.02% tin and 0.15% bismuth
over 6 metres. The initial results indicate mineralization disseminated much
more broadly than reported historically and with significant grades occurring
almost 70 metres closer to surface than the old mine workings. This has very
significant implications, both in terms of the amount of mineralization and
the choice of a future mining method as this former tungsten mine continues
to be assessed by Oriental Minerals. Other significant results from the upper
portion of hole SD‐01 include:
Intersection
Thickness
Depth WO3
(%)
Mo
(%)
Sn (%) Au
(g/t)
Bi (%) Formation
15 metres 145‐160m 0.04 0.10 0.04 0.03 Sedimentary Breccia
7 metres 160‐167m 0.14 0.07 0.15 0.05 Sedimentary Breccia
4 metres 167‐171m 0.03 0.01 0.09 0.02 0.04 Sedimentary Breccia
22 metres 171‐193m 0.87 0.11 0.02 0.14 0.08 Breccia‐Skarn contact
Including 6m 179‐185m 2.37 0.12 0.02 0.34 0.15 same
4 metres 193‐197m 0.02 0.01 Cut & Fill Stope
2 metres 197‐199m 0.14 0.59 0.02 Skarn
7 metres 199‐205m 0.01 0.02 Cut & Fill Stope
7 metres 205‐212m 0.29 0.08 0.12 0.04 Skarn
The intersections closely correlate with bedding concordant quartz‐scheelite veins and as such represent near true width
intersections.
The mineralization intersected between 171 to 193 m is considerably higher in grade than the average historicallyreported
tungsten resource grade of 0.5% WO3 at Sangdong and is at much shallower depths than the 6‐metre thick Main
Vein mineralization (intersected between 248‐250.6m in SD‐01) previously mined by the Korean Tungsten Co., Ltd during
1947‐1992.
Intersection
Thickness
Depth WO3
(%)
Mo
(%)
Sn (%) Au
(g/t)
Bi (%) Formation
15 metres 145‐160m 0.04 0.10 0.04 0.03 Sedimentary Breccia
7 metres 160‐167m 0.14 0.07 0.15 0.05 Sedimentary Breccia
4 metres 167‐171m 0.03 0.01 0.09 0.02 0.04 Sedimentary Breccia
22 metres 171‐193m 0.87 0.11 0.02 0.14 0.08 Breccia‐Skarn contact
Including 6m 179‐185m 2.37 0.12 0.02 0.34 0.15 same
4 metres 193‐197m 0.02 0.01 Cut & Fill Stope
2 metres 197‐199m 0.14 0.59 0.02 Skarn
7 metres 199‐205m 0.01 0.02 Cut & Fill Stope
7 metres 205‐212m 0.29 0.08 0.12 0.04 Skarn
The intersections closely correlate with bedding concordant quartz‐scheelite veins and as such represent near true width
intersections.
The mineralization intersected between 171 to 193 m is considerably higher in grade than the average historicallyreported
tungsten resource grade of 0.5% WO3 at Sangdong and is at much shallower depths than the 6‐metre thick Main
Vein mineralization (intersected between 248‐250.6m in SD‐01) previously mined by the Korean Tungsten Co., Ltd during
1947‐1992.
Within the overlying Pungchon Limestone, a 4‐metre interval between 53 and 57 m returned 52 g/t silver, 0.53% copper,
0.52% zinc and 154 ppm bismuth. This new discovery of near‐surface mineralization reinforces results from surface
sampling reported on February 7, 2007. This mineralization is associated with structurally‐controlled carbonate vein
breccias and hematite alteration in the Pungchon Limestone, which was previously regarded as waste.
Cut and fill stope workings separate the lower 193 ‐ 197 m and 199 ‐ 205 m mineralized intersections. It is believed these
workings represent stopes that partially extracted the Hangingwall Vein. These workings produced most of the delays
encountered in the drilling of SD‐01, requiring significant cement grouting and re‐drilling to pass through the stope.
Drilling operations continue at Sangdong, with hole SD‐02 currently at 106 metres depth and targeted to 640 metres. Drill
hole SD‐03 is currently at 25 metres and targeted to 320 metres depth. A third rig is on site and should commence drilling
shortly.
SD‐01 intersected the following lithological units in sequence:
0‐144m. Pungchon Limestone.
144‐182m. Basal sedimentary breccia of the Pungchon Limestone. Minor quartz‐scheelite vein stockwork.
182‐309.6m. Quartz‐scheelite vein stockworks in skarn altered Myobong Slate.
309.6‐417m. Jangsan Quartzite with quartz‐molybdenum vein stockwork.
417‐435m. Intense brecciated Jangsan Quartzite with quartz‐molybdenum vein stockwork.
435‐459m. Jangsan Quartzite with quartz‐molybdenum vein stockwork.
459‐541m. Intense brecciated Jangsan Quartzite with quartz‐molybdenum vein stockwork.
541‐692.5m. Jangsan Quartzite with quartz‐molybdenum vein stockwork.
692.5‐781m. Taebeksan Series schist with quartz‐molybdenum vein stockwork.
Oriental Minerals is awaiting results from the remainder of the Mybong Slate intercepts and all of the quartzmolybdenum
stockwork mineralization logged in the lower 471 metres of hole SD‐01.
Note: Samples are 1‐metre split HQ core samples and were submitted to ALS Chemex laboratory in Brisbane, Australia
and analyzed by Ore Grade Method XRF‐ME05, Au‐AA21, ME‐ICP41s and Ag‐OG46. Quality Control: Blanks and
Standards samples were routinely inserted with the drill samples at random intervals. Analysis of Standards indicates the
laboratory results are all within ±5% of certified assays and so results are considered reliable. Blank samples were
generally clean as expected, although one blank sample inserted at the high grade zone reported minor contamination of
W and Mo.
QUALIFIED PERSON
The qualified person for the purposes of this release is Mr. Mark Dugmore.
On behalf of the Board of Directors,
Damien Reynolds
Chairman and Director
For more information:
Anna Dalaire
(604) 681‐5755
adalaire@orientalminerals.com
www.orientalminerals.com
Statements in this news release, other than purely historical information, including statements relating to the Company’s future plans
and objectives or expected results, constitute Forward‐looking statements. Such statements are based on numerous assumptions and
are subject to all the risks and uncertainties inherent in the Company’s business, including risks related to mineral exploration and
development. Consequently, actual results may vary materially from those described in the forward‐looking statements.
The TSX Venture Exchange does not accept responsibility for the adequacy or accuracy of this release.
Gruß
