Nortec Minerals Corp. Provides Revised Model and Defines New Targets on the Tomboko Permit
Vancouver, August 9, 2018 - Nortec Minerals Corp. (the "Company" or "Nortec") (TSXV: NVT) announces that staff have defined a new structural interpretation of the geology at the TOM 1 North gold target on the Tomboko exploration project. The Tomboko Permit is located in North Eastern Guinea, West Africa (Figure 1).
Figure 1: Location Map. Guinea, West Africa
-
Click Image To View Full Size -
1.Phase I exploration drilling at TOM 1 North produced significant results with grades of 9 m at 2.74 g/t gold from 32 m, including 3.57 m at 3.91 g/t gold from 36 m and 7 m at 3.57 g/t gold from 43 m, including one m at 17.1 g/t gold from 45 m.
-
2.Phase II, follow up RAB drilling did not produce expected results
-
3.Phase III trenching produced 24m@3.66g/t incl. 4m@10g/t from 18m;
-
4.Starting in June of 2018 Dr Serigne Dieng and staff have worked to build a structural and lithological model to explain the broader results as well as defined vectors for expanding the high grade results obtained in drill core and trenches.
This work has resulted in a clear and coherent model for structurally-controlled gold mineralization hosted in faulted and sheared contact between volcano-clastic successions extending along a NNW-striking, NE-steeply dipping structure that is offset by a series of parallel NE-trending late fault systems (Figures 2 & 3).
Click Image To View Full Size
Click Image To View Full Size
Click Image To View Full Size
Figure 2: Geological and structural map of the TOM 1 North gold target
Click Image To View Full Size
Figure 3: Geological Cross-Section and Plan view map at TOM 1 North gold Target
Dr Dieng explains on the new model, "This new model suggests that the Tomboko gold deposit is a classical greenstone - orogenic-type gold deposit hosted in faulted and sheared contact between volcano-clastic successions. The gold mineralization is structurally-controlled and occurs in deformed zones of large and highly hydrothermally altered, NNW-striking, NE-steeply-dipping, structural corridors that contain a complex network of extensional dilation fracture systems associated with the Late Birimian tectonism that have affected the West African Shield. New outcrops discovered south and north of the drilled area indicate that the deposit could have a strike length of about 3 kilometers. All of these new insights show that the Tomboko deposit has a very high potential for hosting multi-million ounce gold mineralization. Further aggressive exploration programs including extensive RC drilling is highly recommended to define and delineate resources of the Tomboko deposit"
Dr. Dieng, Ph.D., AusIMM, has and is conducting the structural studies of all the data to date. Serigne has 20 years' experience in geological and structural interpretation, modelling and target generation in West Africa. He is a registered qualified professional geoscientist in accordance with NI 43-101 and JORC standards. He received his Ph.D. in Structural Geology, Exploration Geochemistry and Ore Deposit Genesis from Queens University, Kingston, Ontario, Canada (see News Release June 6, 2018).
Interpretation
The diamond drilling and RAB drilling programs consisting of approximately 1900 meters and 4000 meters respectively focused on the original interpretation that the mineralization was dipping to the southwest at 45 to 50 degrees.
Dr. Dieng examined the drill core in detail, carried out field work in the Tom 1 North area and carried out detailed interpretation of the structural controls of mineralization. He arrived at the following conclusions:
-
1the gold mineralization is structurally-controlled and hosted in faulted and sheared contact between volcano-clastic successions that are composed of Ash tuffs and lapilli tuffs;
-
2the shear zone that control the gold mineralization strikes NNW (N350) and steeply dips NE at 75, (not 45 West as previously interpreted), (Figures 2 & 3);
-
3the gold mineralization is associated with pervasive magnetite, chlorite, tourmaline, carbonate, quartz and disseminated pyrite and arsenopyrite (Figure 4);
-
4several parallel late post-mineralization NE-trending fault systems offset and displace the gold bearing structure (Figure 2);
-
5the sedimentary rocks are composed of siltstone and sandstone layers; the volcanoclastic rocks consist of tuffs and pyroclastic rocks; and,
-
6on the light of this investigations, the Tomboko deposit has a very good potential for hosting an economic gold mineralization.
Click Image To View Full Size
Figure 4: Gold mineralization in drill core associated with pyrite, chlorite, magnetite and quartz.
Conclusions & Recommendations
In view of the new interpretation of structural controls of the gold mineralization in the Tom 1 North target, an infill termite geochemical survey (Figures 5 & 6) was initiated to confirm the mineralized structure over the potential deposit area and the expected extensions. The results will be released on receipt.
Click Image To View Full Size
Figure 5: Highly altered, sheared and gossanous rocks with pervasive magnetite and sulphide boxworks outcrop north and south of the main zone over a strike length of about 3 kilometers.
Click Image To View Full Size
Figure 1: Infill termite mound sampling program to define the extensions of the gold zone.
For quality control, the drill cores were sawed in half and the chip samples were split in half. A duplicate, a blank and a standard were inserted every 10th sample for quality control. Samples are processed by Fire Assay with A.A. finish under the SGS FAA505 protocol. The samples were analysed by SGS Labs, an accredited laboratory in Bamako, Mali. RAB samples were also logged in detail, split into 2 kg to 3 kg samples and also analysed by SGS Labs.
Mohan R. Vulimiri, M.Sc., P.Geo, CEO, Director and Michael Collins, B.Sc (Honours), P.Geo. Director are Qualified Persons as defined by NI 43-101. Mr. Vulimiri and Mr. Collins have approved the corporate and technical content contained in this press release.
About Nortec Minerals Corp.
Nortec is a mineral exploration and development company based in Vancouver, British Columbia. Nortec earned a 51% interest in the Tomboko project.
The Company also has a 20% interest in the Tammela Lithium and Gold Project in South-West Finland. Sunstone has completed more than 3,000 meters diamond drilling on the Kietyonmaki Lithium prospect and the Satulinmaki and Riukka gold prospects that comprise the Tammela Project.
Detailed information on the Company's projects have been posted on the Company's website www.nortecminerals.com.
| On behalf of the Board of Directors, Nortec Minerals Corp. "Mohan R. Vulimiri" Mohan R. Vulimiri, CEO and Chairman |
The TSX Venture Exchange has not reviewed and does not accept the responsibility for the adequacy or accuracy of this news release.
This press release contains certain forward looking statements which involve known and unknown risks, delays and uncertainties not under the Company's control which may cause actual results, performances or achievements of the Company to be materially different from the results, performances or expectations implied by these forward looking statements. This news release does not constitute an offer to sell or a solicitation of an offer to buy any of the securities in the United States.