High Grade Gold Sampled On Additional 900 Meter Strike Length At Cerro Prieto
August 11, 2009
VANCOUVER, British Columbia – (August 11, 2009) Oroco Resource Corp. (TSX-V: OCO) (“Oroco” or “the Company”) is pleased to announce the initial results of its Phase Two field program commenced last month at the Cerro Prieto project in Sonora, Mexico.
As part of the 2009 exploration program, geologists sampled 900 meters of outcropping vein structure on the Argonauta concession, starting at the northern boundary of Oroco’s Cerro Prieto concessions. The samples returned high grade or anomalous gold values along the entire strike length tested. This represents a significant extension of the Cerro Prieto vein system successfully tested in Oroco’s 2008 Phase One exploration program. Together with the 1,250 meters of strike length tested in 2008, this increases the strike length on which high grade gold has now been confirmed to over two kilometers.
Highlights of the program are as follows:
- The Cerro Prieto vein and mineralized zone extends for at least 900 meters north of that previously outlined by Oroco in the 2008 trenching and drilling program.
- Intermittent sampling along the mineralized zone resulted in highly anomalous results in gold, silver, lead and zinc.
- Complicated structural preparation (pre-mineralization faulting) in the northern 200 meters of the zone is accompanied by high gold assays including 14.90 g/t/1.0 m, 10.05 g/t/1.0 m and 21.90 g/t/0.8 m.
- Highly anomalous lead (up to 5.4%/0.5 m) and zinc (up to 2.22%/1.0 m) values are also associated with the Cerro Prieto vein system.
A total of 122 samples were collected along a 900 meter strike length and were selectively taken across areas of veining, brecciation or fault gouge only where they are exposed – no physical trenching was attempted. All samples with the exception of two are channel samples, with the two exceptions being composite grab samples. In the collection of channel samples attempts were made to get equal volumes of each rock type in the sample.
Sampling results are grouped into five geographic areas identified on the accompanying map (to view map go to https://orocoresourcecorp.com/).
Area A, where 37 samples were taken, consists of the 700 meter long extension of the Cerro Prieto vein traced by drilling and trenching on the original Cerro Prieto claims. Of the 37 samples taken, 14 assayed greater than 0.5 g/t Au as shown in Table 1.
Table 1. Anomalous Assay Results from Area A
| Sample No. |
Width (m) |
Au (g/t) |
Ag (g/t) |
Pb (%) |
Zn (%) |
| FCO 046 |
1.2 |
0.856 |
0.4 |
0.02 |
0.04 |
| FCO 059 |
1.2 |
6.440 |
3.0 |
0.51 |
0.82 |
| FCO 060 |
1.5 |
4.820 |
2.4 |
0.28 |
0.18 |
| FCO 772 |
0.4 |
0.659 |
74.5 |
0.06 |
0.03 |
| FCO 773 |
1.0 |
0.556 |
6.0 |
0.70 |
0.32 |
| FCO 774 |
1.0 |
0.717 |
18.4 |
0.44 |
0.42 |
| FCO 776 |
0.9 |
3.110 |
16.1 |
0.22 |
1.58 |
| FCO 777 |
0.7 |
0.744 |
10.6 |
0.25 |
0.10 |
| FCO 778 |
1.0 |
4.040 |
4.0 |
0.55 |
1.13 |
| FCO 779 |
1.0 |
3.880 |
5.1 |
1.21 |
1.57 |
| FCO 780 |
1.1 |
1.215 |
6.9 |
0.15 |
0.72 |
| FCO 785 |
0.5 |
1.955 |
2.2 |
0.25 |
0.72 |
| FCO 786 |
0.7 |
3.030 |
2.7 |
0.36 |
0.56 |
| FCO 787 |
0.8 |
0.665 |
0.5 |
0.10 |
0.25 |
Area B encompasses a vein located approximately 100 meters west of the Cerro Prieto vein centered about 400 meters north of the Cerro Prieto – Argonauta claim boundary. A total of 18 samples were taken along the vein of which one returned a gold assay of greater than 0.5 g/t (4.83 g/t Au, 1.8 g/t Ag, 0.30% Pb and 0.57% Zn). Several of the samples in this group have assays of greater than 0.2% Pb and 0.2% Zn.
Area C includes a vein filled structural zone that crosscuts the N10W strike of the main Cerro Prieto vein, strikes N45E and is intermittently exposed over a strike length of 100 meters. A total of 44 samples were taken across vein exposures of which 23 returned assays of greater than 0.5 g/t gold and a three others returned assays with highly anomalous lead or zinc assays. The assay results for the 26 samples are shown in Table 2.
Table 2. Anomalous Assay Results from Area C
| Sample No. |
Width (m) |
Au (g/t) |
Ag (g/t) |
Pb (%) |
Zn (%) |
| FCO 069 |
1.2 |
1.100 |
3.2 |
0.21 |
0.36 |
| FCO 070 |
1.3 |
1.015 |
1.6 |
0.11 |
0.25 |
| FCO 071 |
1.2 |
1.640 |
1.7 |
0.06 |
0.14 |
| FCO 072 |
0.5 |
0.940 |
1.2 |
0.14 |
0.18 |
| FCO 073 |
0.6 |
0.867 |
1.4 |
0.15 |
0.14 |
| FCO 075 |
0.5 |
1.025 |
0.7 |
0.07 |
0.17 |
| FCO 077 |
1.0 |
2.830 |
1.1 |
0.09 |
0.22 |
| FCO 079 |
0.6 |
0.063 |
10.1 |
1.36 |
0.03 |
| FCO 081 |
1.5 |
3.320 |
2.2 |
0.11 |
0.24 |
| FCO 082 |
0.5 |
1.885 |
8.7 |
0.44 |
0.23 |
| FCO 083 |
1.5 |
7.650 |
7.6 |
0.28 |
0.27 |
| FCO 084 |
1.5 |
1.030 |
3.9 |
0.13 |
0.16 |
| FCO 087 |
1.5 |
3.460 |
5.7 |
0.32 |
0.73 |
| FCO 088 |
1.5 |
6.340 |
4.4 |
0.26 |
0.46 |
| FCO 830 |
1.3 |
0.520 |
0.9 |
0.15 |
0.25 |
| FCO 836 |
1.1 |
0.552 |
0.7 |
0.17 |
0.31 |
| FCO 838 |
1.1 |
0.989 |
2.6 |
0.24 |
0.40 |
| FCO 839 |
1.2 |
0.511 |
1.2 |
0.26 |
0.32 |
| FCO 841 |
1.1 |
0.180 |
16.1 |
1.10 |
0.65 |
| FCO 845 |
0.5 |
7.160 |
27.4 |
5.40 |
1.39 |
| FCO 846 |
1.0 |
0.628 |
3.2 |
0.75 |
2.22 |
| FCO 847 |
1.0 |
1.485 |
1.7 |
0.22 |
0.41 |
| FCO 849 |
0.5 |
3.280 |
17.6 |
0.28 |
0.88 |
| FCO 850 |
1.1 |
0.887 |
4.8 |
0.33 |
0.23 |
| FCO 852 |
0.5 |
0.357 |
67.4 |
1.80 |
0.53 |
| FCO 853 |
1.3 |
0.689 |
3.5 |
0.52 |
1.31 |
Area D encompasses an exposed 150 meter long N70W veined structural zone beginning 50 meters north of the northeast end of Area C. A total of 21 samples were taken across this zone of which seven have assays of greater than 0.5 g/t Au and include the three highest gold assays of this program. The results are presented in Table 3.
Table 3. Anomalous Assay Results from Area D
| Sample No. |
Width (m) |
Au (g/t) |
Ag (g/t) |
Pb (%) |
Zn (%) |
| FCO 859 |
1.0 |
14.900 |
24.1 |
0.25 |
0.75 |
| FCO 860 |
1.2 |
6.480 |
16.1 |
0.65 |
0.79 |
| FCO 861 |
1.0 |
10.050 |
10.1 |
0.13 |
0.38 |
| FCO 862 |
0.8 |
21.900 |
15.5 |
0.13 |
0.30 |
| FCO 863 |
1.1 |
6.690 |
6.9 |
0.09 |
0.19 |
| FCO 868 |
1.0 |
0.902 |
5.6 |
0.07 |
0.10 |
| FCO 870 |
1.2 |
1.595 |
30.1 |
0.05 |
0.13 |
Area E encompasses a weak structural zone striking N70E and is located approximately 250 meters east of the juncture of the Cerro Prieto vein and the N45E vein (Area C). Two samples have been taken to date in Area E and both are highly anomalous in gold with one assaying 2.210 g/t Au, 92.2 g/t Ag, 0.10% Pb and 0.17% Zn over 0.4 meters and the other assaying 3.520 g/t Au, 5.0 g/t Ag, 0.06% Pb and 0.16% Zn over 3.0 meters.
In summary, the sampling program has confirmed the extension of the Cerro Prieto vein system over a strike length of 900 meters in addition to the 1250 meters outlined by Oroco’s 2008 drilling and trenching program. The complex structural regime and the high associated gold assays at the north end of the zone (Areas C, D and E) are indications of extensive ground preparation with the potential for associated strong mineralization.
Phase Two exploration at Cerro Prieto continues with two drills currently being mobilized to commence an 8,000 meter drill program focusing on the expansion, on strike to the north, of the previously defined oxide resource. Approximately 1,500 meters of strike length of the structure will be tested in this phase of exploration. Continuity of the mineralized zone has now been established by a step-out drill hole and surface trenching completed during 2008, as well as by the sampling program discussed herein.
About Oroco
Oroco is a Canadian-based mineral exploration company with primary focus on the accelerated development of the gold bearing oxide zones of its Cerro Prieto project, a polymetallic (Au-Ag-Pb-Zn) project in Sonora State, Mexico.
The Cerro Prieto project consists of the 100% owned, 2,723 ha, San Felix, San Francisco and Cerro Prieto concessions and 4,120 ha of the connecting Argonauta 5 Fraccion 1 concession to which the Company holds an option to purchase (see May 14, 2009 news release). During the first field season in 2008, the Company drilled 5,975 metres of core and tabled a NI 43-101 compliant resource estimate together with the results of a preliminary metallurgical study (See May 11, 2009 news release). The Company is moving the Cerro Prieto project forward with the rapid development of mineral resources, further metallurgy studies and the development of a preliminary assessment by an independent mining engineering firm.
Qualified Person
Kenneth R. Thorsen, B.Sc., P. Geo., is a director of the company and is a ‘qualified person’ for the purposes of National Instrument 43-101 Standards of Disclosure for Mineral Properties of the Canadian Securities Administrators and has verified the data (including sampling, analytical and test data) and prepared or supervised the preparation of the information contained in this news release.
Quality Assurance & Control
The Company has implemented a quality assurance and control (QA/QC) program to ensure sampling and analysis of all exploration work is conducted in accordance with the best possible practices. Samples are transported to the ALS Chemex laboratory in Hermosillo where they are crushed and pulverized, with pulps then sent to the ALS Chemex laboratory in Vancouver, B.C. for assaying. The QA/QC policy includes the chain of custody monitoring and the insertion of blanks, standards and duplicates in the initial samples submitted. The laboratory provides an additional internal control program.
For further information, please contact:
Mr. Craig Dalziel, President and CEO
Oroco Resource Corp.
Tel: 604-688-6200
www.orocoresourcecorp.com
Neither TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.
