Orezone Gold Corporation: Positive Results Continue at Bombore With Seven Drills Operating

OTTAWA, ONTARIO--(Marketwire - Sept. 12, 2011) - Orezone Gold Corporation (TSX:ORE) is pleased to announce additional positive drill results from an ongoing 170,000 m infill and expansion drill program at its 100% owned Bomboré Gold Project in Burkina Faso, West Africa. Results include 234 reverse circulation (RC) holes (11,942 m) and 43 core holes (6,979 m) from the northern and southern portions of the 11 km long Bomboré resource.

The objectives of the program are to expand and upgrade sulphide resources with core drilling at depth, as well as to upgrade and expand near-surface oxide resources with reverse circulation drilling (RC).

With 60% of the drilling completed to date and 37% of the assays reported, the results indicate success in achieving both objectives with a significant increase in resources and improved project economics expected.

This is the fifth substantial release of drill results from the ongoing program at Bomboré where cumulative results indicate higher grades (+37% in the oxide, +35% in the sulphide) and narrower widths (94% in the oxide, 71% in the sulphide) compared to the October 2010 NI 43-101 compliant resource model ("the 2010 model") (see Table 1). The average cut grade of the entire database to date, using a lower cutoff of 0.5 g/t and a topcut of 5g/t, is 1.19 g/t. The average cut grade of the current drill program is 1.04 g/t, which although is 36% higher than expected, is lower than the overall average due to a large backlog of leach residue assay results that have not yet been reported from the better grade zones (P8P9). The extensions of the mineralization discovered below the Maga and Siga South pit shells will result in a significant increase in sulphide resources in these areas. Drilling also demonstrates increased continuity between the pit shells that will result in lower open pit mining strip ratios for the oxide zone.

"These drill results continue to increase our confidence in achieving our current resource growth targets, and demonstrate that the mineralization in the Siga South area is robust down to 200 m and remains open below," said Ron Little, CEO for Orezone. "We are especially pleased given that the results to date have come from areas of the deposit with the least amount of historical drilling (see maps for Siga South(http://www.orezone.com/sites/default/files/Orezone%20-%20Comparison%20of%20Drilling%20Results%20at%20Bombore%20-%20Siga%20South.JPG), and Siga West and East(http://www.orezone.com/sites/default/files/Orezone%20-%20Comparison%20of%20Drilling%20Results%20at%20Bombore%20-%20Siga%20West%20and%20East.JPG). In contrast, the remaining 70,000 m of drilling from this campaign will occur in the heart of the 2010 model where confidence, grades and continuity have always been highest."

The drill results and conclusions are preliminary and may be further improved as a significant number of fire assay results for the leach sample residues are still pending. The residue fire assays typically increase the total cut grade by 10%. Table 1 summarizes the above and provides a comparison of the results to date with the 2010 model.

Table 1: Comparison of Current Program with 2010 Resource Model

Total Program Statistics to Date					Average Grade		Comparison with 2010 Resource Model
Zone	holes	meters	% Complete		Uncut (g/t)	Cut(1) (g/t)	Cut Grade (g/t)		Width (m)
Maga-RC	50	3,455	17	%	1.37	1.33	117	%	74	%
Maga-DD	50	7,702	38	%	1.19	1.11	131	%	61	%
CFU-DD	4	653	24	%	1.05	1.05
P8P9-RC	66	3,377	0	%	1.04	0.95	149	%	94	%
P17-RC	18	888	100	%	2.09	1.71	209	%	61	%
P17-DD	7	1,095	100	%	2.05	1.73	129	%	102	%
P16-RC	20	1,096	100	%	1.44	1.35	223	%	105	%
P16-DD	7	1,001	100	%	2.51	1.80	252	%	87	%
P11-RC	132	6,771	70	%	0.88	0.88	227	%	146	%
Siga S-RC	208	10,517	100	%	2.27	0.99	143	%	154	%
Siga S-DD	60	9,699	99	%	1.14	1.00	133	%	86	%
Siga W-RC	117	5,901	98	%	0.89	0.87	156	%	72	%
Siga W-DD	7	1,355	16	%	1.06	1.00	140	%	60	%
Siga E-RC	141	7,649	80	%	1.07	0.98	124	%	75	%
Siga E-DD	9	1,221	13	%	0.85	0.85	132	%	36	%
All-RC	752	39,654	47	%	1.49	1.04	137	%	94	%
All-DD	144	22,725	27	%	1.18	1.05	135	%	71	%

Table 2 Breakdown of Drilling Meterage for this Release

	Core		RC
Zone	# of holes	m	# of holes	m
CFU	0	0	0	0
Maga	0	0	0	0
P8P9	0	0	66	3,377
P17	0	0	0	0
P16	0	0	0	0
Siga S	29	4,830	19	950
Siga W	5	928	10	500
Siga E	9	1,221	23	1,201
P11	0	0	116	5,914
Total	43	6,979	234	11,942

(1) Weighted average grade of individual assays cut to 5 g/t

"At Siga South, gold mineralization now displays vertical continuity up to 200 m in the down-dip direction, and remains open at depth on most sections, with a possible shallow northerly plunge," added Pascal Marquis, SVP Exploration for Orezone. "Based on the positive results to date, a minimum of an additional 50,000 m of definition drilling is warranted for next year to further expand upon the 2011 resource targets."

Highlights of the core drilling include 1.36 g/t gold over a 31.5 m length, at a vertical depth of 155 meters (hole BBD0183), and 0.92 g/t gold over a 13.5 m length, at a vertical depth of 195 meters (hole BBD0189). The dip of the mineralized zones is approximately 55 degrees, nearly orthogonal to the core drilling, which means that the true width of the mineralized intervals is > 90% of the core length.

Table 3: Highlights of Core Hole Results for this Release

				From	To	Length	Uncut Grade(2)	Cut Grade(3)	Total
Zone	Section		Hole #	(m)	(m)	(m)	(g/t)	(g/t)	Assay(4)
Maga	2975		BBD0144	12.50	17.50	5.00	5.28	2.32
Siga W	11550		BBD0200	149.00	156.50	7.50	1.56	1.56	Pending
Siga W	11550		BBD0220	60.50	72.50	12.00	0.88	0.88	Pending
Siga W	11500		BBD0218	66.00	73.50	7.50	1.52	1.52	Pending
Siga W	11500		BBD0218	137.50	148.00	10.50	1.08	1.08	Pending
Siga W	11500		BBD0219	54.00	63.00	9.00	1.47	1.47	Pending
Siga W	11450		BBD0216	14.00	19.50	5.50	2.16	2.16
Siga W	11450		BBD0216	113.00	129.50	16.50	0.86	0.86	Pending
Siga S	11350		BBD0199	41.00	63.00	22.00	0.89	0.89	Pending
Siga S	11250		BBD0302	56.00	68.00	12.00	1.22	1.22	Pending
Siga S	11250		BBD0302	90.50	108.50	18.00	0.67	0.67	Pending
Siga S	11200		BBD0198	81.50	90.50	9.00	6.53	1.97	Pending
Siga S	11200		BBD0198	99.50	107.00	7.50	1.42	1.42	Pending
Siga S	11150		BBD0197	72.50	92.00	19.50	1.19	1.10	Pending
Siga S	11050		BBD0227	117.50	126.50	9.00	1.15	1.15	Pending
Siga S	11050		BBD0228	165.00	175.50	10.50	1.14	1.14	Pending
Siga S	10950		BBD0224	169.00	181.00	12.00	1.45	1.40	Pending
Siga S	10900		BBD0221	119.00	123.50	4.50	2.56	2.25	Pending
Siga S	10900		BBD0222	158.00	170.00	12.00	3.03	1.83	Pending
Siga S	10850		BBD0196	104.00	116.00	12.00	1.01	1.01	Pending
Siga S	10800		BBD0192	89.00	110.00	21.00	1.35	1.35	Pending
Siga S	10750		BBD0189	251.00	264.50	13.50	0.92	0.92	Pending
Siga S	10700		BBD0185	105.50	129.50	24.00	0.95	0.95	Pending
Siga S	10650		BBD0183	182.00	213.50	31.50	1.36	1.36	Pending
Siga S	10600		BBD0175	1.50	15.00	13.50	1.03	1.03
Siga S	10600		BBD0177	3.50	8.50	5.00	5.62	3.28
Siga S	10600		BBD0178	155.00	191.50	36.50	0.85	0.85	Pending
Siga S	10550		BBD0173	27.50	36.00	8.50	1.76	1.76
Siga S	10500		BBD0168	6.00	25.50	19.50	2.22	1.86
Siga S	10500		BBD0169	46.00	65.00	19.00	1.09	1.09
Siga S	10200		BBD0161	30.00	40.00	10.00	2.81	1.52

(2) Weighted average grade of uncut individual assays

(3) Weighted average grade of individual assays cut to 5 g/t

(4) Composite width and grade are preliminary where fire assay residue results are pending

RC drilling on the Siga E - P11 zones indicates good continuity within the Siga E 2010 Whittle pit shells, and better than expected continuity in the northern part of the P11 zone and southern part of the P8P9 zone.

The RC drill holes confirm the continuity of the mineralized zones in the near-surface oxide material. These results complement RC results reported in May for Siga West and Siga South that indicated the cut grades (top cut of 5 g/t) are higher than expected, with widths better than those expected in the model in the Siga South zone and narrower than expected in the Siga West zone.

Highlights from the latest RC drilling include 25.0 m @ 1.69 g/t gold (hole BBC2045), and 23.0 m @ 1.19 g/t gold (hole BBC1862).

Table 4: Highlights of RC Results for this Release

				From	To	Length	Uncut Grade(5)	Cut Grade(6)	Total
Zone	Section		Hole	(m)	(m)	(m)	(g/t)	(g/t)	Assay(7)
P11	50050		BBC1875	5.00	20.00	15.00	0.78	0.78	Pending
P11	48950		BBC1836	40.00	48.00	8.00	1.27	1.27	Pending
P11	48900		BBC1831	6.00	15.00	9.00	1.85	1.75	Pending
P11	48200		BBC1862	6.00	29.00	23.00	1.19	1.19	Pending
P8P9	900		BBC1934	33.00	40.00	7.00	1.96	1.70	Pending
P8P9	800		BBC2045	11.00	36.00	25.00	1.83	1.69	Pending
P8P9	750		BBC2037	2.00	8.00	6.00	2.87	1.74	Pending
P8P9	750		BBC2037	24.00	41.00	17.00	0.72	0.72	Pending
P8P9	750		BBC2038	8.00	14.00	6.00	2.09	1.85	Pending
Siga E	12600		BBC1703	15.00	29.00	14.00	0.95	0.95
Siga E	12550		BBC1699	12.00	30.00	18.00	0.70	0.70
Siga E	12550		BBC1701	9.00	20.00	11.00	1.15	1.15
Siga E	12500		BBC1695	1.00	5.00	4.00	4.31	2.87
Siga E	12450		BBC1690	11.00	37.00	26.00	0.73	0.73
Siga E	12450		BBC1691	2.00	14.00	12.00	1.14	1.14
Siga E	12450		BBC1691	23.00	40.00	17.00	1.14	1.14
Siga E	12400		BBC1689	0.00	26.00	26.00	1.40	1.40
Siga E	12350		BBC1688	24.00	34.00	10.00	1.06	1.06
Siga E	12050		BBC1626	23.00	34.00	11.00	6.35	1.85
Siga E	12050		BBC1627	0.00	15.00	15.00	1.35	1.35
Siga E	12050		BBC1627	37.00	50.00	13.00	0.84	0.84
Siga E	12000		BBC1629	31.00	37.00	6.00	2.13	2.13
Siga E	12000		BBC1630	0.00	14.00	14.00	1.77	1.77
Siga E	12000		BBC1651	34.00	54.00	20.00	0.80	0.80
Siga E	11900		BBC1640	38.00	46.00	8.00	1.37	1.37
Siga E	11850		BBC1646	22.00	35.00	13.00	1.38	1.19
Siga E	11450		BBC1673	30.00	47.00	17.00	0.80	0.80
Siga W	12450		BBC1582	16.00	24.00	8.00	3.12	1.63
Siga W	12300		BBC1606	27.00	37.00	10.00	1.54	1.54
Siga S	11250		BBC1789	25.00	41.00	16.00	0.92	0.92	Pending
Siga S	11100		BBC1480	12.00	24.00	12.00	0.85	0.85
Siga S	11100		BBC1481	28.00	42.00	14.00	0.78	0.78
Siga S	10550		BBC1425	6.00	46.00	40.00	1.51	1.48
Siga S	10550		BBC1426	5.00	20.00	15.00	1.31	1.31
Siga S	10500		BBC1419	29.00	47.00	18.00	0.73	0.73
Siga S	10500		BBC1420	5.00	26.00	21.00	1.06	1.06
Siga S	10500		BBC1420	29.00	47.00	18.00	1.34	1.34
Siga S	10500		BBC1747	17.00	45.00	28.00	0.84	0.84
Siga S	10450		BBC1745	6.00	40.00	34.00	1.41	1.41
Siga S	10400		BBC1744	9.00	15.00	6.00	2.22	2.22
Siga S	10350		BBC1742	17.00	34.00	17.00	1.13	1.13
Siga S	9700		BBC1724	34.00	41.00	7.00	1.83	1.82
Siga S	9650		BBC1721	22.00	28.00	6.00	5.66	1.68

(5) Weighted average grade of uncut individual assays

(6) Weighted average grade of individual assays cut to 5 g/t

(7) Composite width and grade are preliminary where fire assay residue results are pending

The mineralized intervals are based on a lower cut-off grade of 0.5 g/t, a minimal width of 3 m and up to a maximum of two consecutive meters of dilution being included. The true width of the mineralization is equal to about 85% of the drill length intervals in Maga, P16 and P17 areas, and to 95% of the drill length intervals in the Siga area. The half-core samples were collected by Orezone employees using a diamond saw. The core samples from the weathered (oxide) zone were prepared by Abilab Burkina s.a.r.l. (a subsidiary of ALS-Chemex) and SGS Burkina Faso s.a.r.l., and then split by Orezone to 1 kg using Rotary Sample Dividers (RSDs). A 1 kg aliquot was analyzed for leachable gold at BIGS Global Burkina s.a.r.l in Ouagadougou, by bottle-roll cyanidation using a LeachWell™ catalyst. The samples from the fresh or sulphide zone were prepared by BIGS Global Burkina s.a.r.l and SGS Burkina Faso s.a.r.l. in Ouagadougou and then split by Orezone to 50 g using Rotary Sample Dividers (RSDs). A 50 g aliquot was analyzed by fire assay at Abilab Burkina s.a.r.l. (a subsidiary of ALS-Chemex).

The RC drilling samples were divided by Orezone employees using Rotary Sample Dividers (RSDs). A 2 kg split was prepared by Abilab Burkina s.a.r.l. (a subsidiary of ALS-Chemex) and SGS Burkina Faso s.a.r.l., and then split by Orezone to 1 kg using RSDs. A 1 kg aliquot was analyzed for leachable gold at BIGS Global Burkina s.a.r.l in Ouagadougou, by bottle-roll cyanidation using a LeachWell™ catalyst. The leach residues from all samples with a leach grade in excess of 0.2 g/t were prepared by BIGS Global Burkina s.a.r.l. and then split by Orezone to 50 g using Rotary Sample Dividers (RSDs). A 50 g aliquot was analyzed by fire assay at Abilab Burkina s.a.r.l. (a subsidiary of ALS-Chemex).

Orezone employs a rigorous Quality Control Program (QCP) including a minimum of 10% standards, blanks and duplicates. This program was executed under the supervision of Pascal Marquis, SVP Exploration for Orezone, who is a Qualified Person under National Instrument 43-101 and approved the technical information in this release. A complete table of results and the NI 43-101 Bomboré Resource Report that describes the Bomboré resource model can be found at www.orezone.com.

Orezone has now completed 101,842 meters (60%) of the 170,000 m drill program and reported 37% of the assay results received to date. Upon completion of the program and receipt of all results by Q1 2012, a total resource update will be announced in Q2 2012. Drilling has continued through the rainy season with up to seven rigs (five core, two RC) operating. The immediate priorities are to complete the first pass of core drilling for the entire Siga and P11 areas, while the RC program continues at P8/P9. The drilling of newly discovered mineralization that remains open-ended, including both shallow oxide targets and deeper sulphide extensions, is beyond the scope of the 2011 program, and will be a priority for more drilling in 2012. Aside from the drilling, the environmental impact study is well underway along with continued metallurgical and optimization studies. The new camp has been commissioned, and the new access roads are nearly complete and are already being utilized.

About Orezone Gold Corporation

Orezone is a Canadian company with a gold discovery track record of +10 M oz and recent mine development experience in Burkina Faso, West Africa. Bomboré, the Company's 100% owned flagship project, is one of the largest gold deposits in the country and is situated 85 km east of the capital city, adjacent to an international highway. Resources are constrained within optimized open pit shells that span 11 km, and include 1.6 M oz indicated and 1.9 M oz inferred resources with an average drill depth of only 60 meters. The Company is currently completing a $24 M, 170,000 meter drill program to significantly expand resources and support the completion of feasibility studies in 2012. Orezone's goal is to develop Bomboré into a world-class deposit by 2012 and become a mid-tier producer by 2015.

FORWARD-LOOKING STATEMENTS AND FORWARD-LOOKING INFORMATION: This news release contains certain "forward-looking statements" within the meaning of applicable Canadian securities laws. Forward-looking statements and forward-looking information are frequently characterized by words such as "plan," "expect," "project," "intend," "believe," "anticipate", "estimate" and other similar words, or statements that certain events or conditions "may" or "will" occur. Forward-looking statements in this release include statements regarding, among others, the completion of a 170,000m drill program; capital and operating cost estimates; gold production for the project; completion of a feasibility study in 2012; completion of a resource update in early 2012; commencement of production at the Bomboré Project; and completion of metallurgical testing and social impact studies.

FORWARD-LOOKING STATEMENTS are based on certain assumptions, the opinions and estimates of management at the date the statements are made, and are subject to a variety of risks and uncertainties and other factors that could cause actual events or results to differ materially from those projected in the forward-looking statements. These factors include the inherent risks involved in the exploration and development of mineral properties, the uncertainties involved in interpreting drilling results and other geological data, fluctuating metal prices, the possibility of project cost overruns or unanticipated costs and expenses, the ability of contracted parties (including laboratories and drill companies to provide services as contracted); uncertainties relating to the availability and costs of financing needed in the future and other factors. The Company undertakes no obligation to update forward-looking statements if circumstances or management's estimates or opinions should change. The reader is cautioned not to place undue reliance on forward-looking statements. Comparisons between any resource model or estimates with the subsequent drill results are preliminary in nature and should not be relied upon as potential qualified changes to any future resource updates or estimates.

Readers are advised that National Instrument 43-101 of the Canadian Securities Administrators requires that each category of mineral reserves and mineral resources be reported separately. Readers should refer to the annual information form of Orezone for the year ended December 31, 2010 and other continuous disclosure documents filed by Orezone since January 1, 2011 available at www.sedar.com, for this detailed information, which is subject to the qualifications and notes set forth therein.