Timberline Resources Corp. Drills Primary Copper Porphyry Mineralization, and Expands Copper Oxide Zone at Elder Creek Project, Nevada
COEUR D'ALENE, Jan. 8, 2020 - Timberline Resources Corporation (OTCQB:TLRS)(TSXV:TBR) ("Timberline" or the "Company") reports that it drilled a long interval of copper-silver porphyry-style mineralization in the initial test of the Morning Glory Hill target at the Elder Creek project in the Battle Mountain district of Nevada. Reverse circulation ("RC") hole RCEC 19-05 intercepted 305 feet (ft) (93 meters (m)) grading 0.25% Cu, 0.08 g/t Au, and 9 g/t Ag and bottomed in mineralization at 555 ft (169 m) because of limitations of the drill rig within intensely silicified rock. Additionally, three RC holes further delineated a broad area of thick, near-surface copper oxide mineralization at the Valmy Pit target area of the project. Timberline has the right to acquire a 65% interest in the 16 square mile (41 km2) Elder Creek property through an earn-in agreement with McEwen Mining Inc. The Company is actively seeking a strategic partner for Elder Creek. Steven Osterberg, Timberline's President and CEO commented, "The recently-completed drill holes at Elder Creek further define a large mineralized copper-gold-silver porphyry system with multiple intrusive and mineralizing events. We have already identified six priority target areas over only a small portion of the porphyry system. Three of these targets have been tested by initial drill holes, most of which bottomed in long intervals of porphyry-related mineralization. Elder Creek is a unique opportunity for a significant discovery in an active mining jurisdiction with excellent infrastructure."
Morning Glory Hill Target
RCEC19-05 tested an area of outcropping mineralized porphyry breccia on Morning Glory Hill. The breccia is coincident with large IP resistivity and chargeability high anomalies (Figures 1, 2 and 3). Assay results are summarized in Table 1. The mineralized interval is intensely altered with silica (quartz), sericite, and chlorite and contains from 2% to >10% disseminated sulfides including pyrite, chalcopyrite, and minor molybdenite. Silver has a strong positive correlation with copper values.
Copper mineralization in RCEC19-05 and in nearby historic hole 98EC-07 (18 m @ 0.45% Cu, and 6 m @ 0.57% Cu) appears associated with coincident high IP and high resistivity geophysical signatures (Figure 3) likely due to the disseminated sulfides and pervasive silicification, respectively.
Table 1. Summary of Elder Creek Drilling Assay Results by Target Area
| Drill Hole | From (feet) | To (feet) | Total (feet) | From | To | Total | Cu | Mo | Au | Ag |
| Morning Glory Hill Target | ||||||||||
| RCEC19-05 | 75 | 250 | 175 | 22.9 | 76.2 | 53.4 | 0.03 | 181 | 0.017 | 4 |
| 250 | 555 TD | 305 | 76.2 | 169.2 TD | 93.0 | 0.25 | 122 | 0.083 | 9 | |
| including: | 255 | 345 | 90 | 77.7 | 105.2 | 27.4 | 0.34 | 141 | 0.138 | 14 |
| 255 | 265 | 10 | 77.7 | 80.8 | 3.0 | 0.74 | 69 | 0.280 | 38 | |
| 98EC-07 (historic) | 135 | 455 | 320 | 41.2 | 138.7 | 97.5 | 0.23 | Historic; No Data | ||
| including: | 375 | 435 | 60 | 114.3 | 132.6 | 18.3 | 0.45 | |||
| 135 | 155 | 20 | 41.2 | 47.3 | 6.1 | 0.57 | ||||
| RCEC 19-01 | 270 | 1960 TD | 1690 | 82.3 | 597.6 TD | 515.3 | 0.07 | 212 | - | 2 |
| including: | 475 | 680 | 205 | 144.8 | 207.3 | 62.5 | 0.12 | 222 | - | 4 |
| 1115 | 1180 | 65 | 339.9 | 359.8 | 19.9 | 0.25 | 181 | - | 5 | |
| 1615 | 1630 | 15 | 492.4 | 497.0 | 7.6 | 0.21 | 233 | - | 5 | |
| Quartz-Sulfide Breccia Target | ||||||||||
| CCEC 18-02 | 840 | 1497 TD | 657 | 256.1 | 456.4 TD | 200.3 | 0.15 | 730 | - | 4 |
| including: | 1313.5 | 1360 | 46.5 | 400.5 | 414.6 | 14.2 | 1.20 | 0.31% | 0.13 | 26 |
| Valmy Pit Target | ||||||||||
| RCEC 18-01 | 0 | 500 TD | 500 | 0 | 152.4 TD | 152.4 | 0.21 | 145 | - | 3 |
| including: | 160 | 270 | 110 | 48.8 | 82.3 | 33.5 | 0.44 | 181 | - | 5 |
| including: | 195 | 210 | 15 | 59.5 | 64.0 | 4.6 | 0.55 | 132 | 0.33 | 13 |
| RCEC 19-02 | 85 | 270 | 185 | 25.9 | 82.3 | 56.4 | 0.22 | - | - | 3 |
| 415 | 565 TD | 150 | 126.5 | 172.2 TD | 45.7 | 0.16 | - | - | 3 | |
| RCEC 19-03 | 0 | 405 TD | 405 | 0 | 123.5 TD | 123.5 | 0.16 | - | - | 2 |
| including: | 0 | 100 | 100 | 0 | 30.5 | 30.5 | 0.20 | - | - | 5 |
| RCEC 19-04 | 0 | 30 | 30 | 0 | 9.2 | 9.2 | 0.19 | - | - | 6 |
| 150 | 165 | 15 | 45.7 | 50.3 | 4.6 | 0.34 | - | - | 9 | |
| *True thickness of drill intercepts is unknown; **TD: drill hole total depth *** see below section "Sampling Methodology, Chain of Custody, Quality Control and Quality Assurance" for protocols | ||||||||||
Valmy Pit Target
RCEC19-02, 03 & 04, totaling 1,470 ft (448 m) (see Table 1), were drilled to offset and expand the mineralization identified in RCEC 18-01 (Figure 1) which averaged 0.21% Cu over its entire 500 ft (152 m) length, including 110 ft (34 m) grading 0.44% Cu. RCEC19-02 contained intercepts of 185 ft (56 m) grading 0.22% Cu and 150 ft (46 m) grading 0.16% Cu, while RCEC 19-03 averaged 0.16% Cu across its entire 405 ft (124 m) length. Each drill hole bottomed in mineralization with drilling terminated due to intense silica alteration and groundwater. These holes extended the footprint of the shallow copper oxide mineralization at the Valmy Pit target area to approximately 575 ft (175 m) by 400 ft (122 m). The mineralization remains open in all directions and to depth, where it transitions to sulfide mineralization.
Exploration Plans
Given the magnitude of the opportunity at Elder Creek, the Company is actively seeking a strategic partner to explore this areally huge porphyry system. Only a small portion of the system has been evaluated to date. The three target areas that have been drilled contain substantial Cu ± Mo-Ag-Au prophyry mineralization. Future objectives include offsetting and deepening these drill holes, and identifying and testing new targets.
Figure 1. Elder Creek Property Geology, IP Geophysics, Drilling, and Target Areas
Figure 2. Elder Creek Priority Target Areas, IP Anomaly, Structures, Drilling Results
Figure 3. Elder Creek L3800N Geology and Drill Holes, and IP/Resistivity Cross Section
Elder Creek Property: Timberline's Elder Creek copper-gold, and adjacent Paiute properties lie within the prolific Battle Mountain District of Nevada, approximately 11 miles (18 km) north of Newmont's Phoenix mining complex. Data compiled from over 40-plus years of exploration on the property includes only limited shallow (typically less than 500 ft (152 m)), historic drilling in the pronounced magnetic low and along the north and northeastern of magnetic high donut zone targeted primarily at gold. Geologic and geophysical characteristics, and rock geochemical sampling results evident at Elder Creek (see press release dated June 18, 2018 at http://timberlineresources.co/press-releases/) are common to major porphyry copper deposits. Three primary target areas have been identified to date at Elder Creek.
Further technical details of the Company's Elder Creek project may be viewed at: http://timberlineresources.co/projects/ElderCreek/.
Sampling Methodology, Chain of Custody, Quality Control and Quality Assurance: Samples of reverse circulation cuttings were collected at the drill rig at 5 feet intervals under the supervision of a Company representative and transported to ALS in Nevada for analyses. Samples were assayed for gold by Fire Assay of a 30 gram (1 assay ton) charge with an AA finish (ALS code Au-AA23). Samples were also assayed for a 48 multi-element using four acid ICP-MS (code ME-MS61). "Over-limits" were re-assayed using 4-acid Aqua regia digestion and ICP or AAS finish (code Cu-OG62).
Steven Osterberg, Ph.D., P.G., Timberline's President and Chief Executive Officer, is a Qualified Person as defined by National Instrument 43-101 and has reviewed and approved the technical contents of this release. Mr. Osterberg is not considered independent of the Company as defined in Section 1.5 of NI 43-101. Drill intercepts are reported as drill thicknesses; true widths of intercepts are unknown.
About Timberline Resources: Timberline Resources Corp. is focused on advancing district-scale gold exploration and development projects in Nevada. These include the Lookout Mountain joint venture project with PM & Gold Mines operated by Timberline and the Windfall project, both in the Eureka district, as well as being operator of both the Paiute joint venture project with Nevada Gold Mines, and the Elder Creek joint venture with McEwen Mining, both in the Battle Mountain district. All of these properties lie on the prolific Battle Mountain-Eureka gold trend. Timberline also owns the Seven Troughs property in Northern Nevada, which is one of the state's highest-grade former producers. Timberline has increased its owned and controlled mineral rights in Nevada to over 43 square miles (27,500 acres). Detailed maps and NI 43-101 estimated resource information for the Eureka property may be viewed at http://timberlineresources.co/.
Timberline is listed on the OTCQB where it trades under the symbol "TLRS" and on the TSX Venture Exchange where it trades under the symbol "TBR".
Forward-looking Statements: Statements contained herein that are not based upon current or historical fact are forward-looking in nature and constitute forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. Such forward-looking statements reflect the Company's expectations about its future operating results, performance and opportunities that involve substantial risks and uncertainties. These include, but are not limited to, statements regarding the advancement of projects, and exploration potential. When used herein, the words "anticipate," "believe," "estimate," "upcoming," "plan," "target", "intend" and "expect" and similar expressions, as they relate to Timberline Resources Corp., its subsidiaries, or its management, are intended to identify such forward-looking statements. These forward-looking statements are based on information currently available to the Company and are subject to a number of risks, uncertainties, and other factors that could cause the Company's actual results, performance, prospects, and opportunities to differ materially from those expressed in, or implied by, these forward-looking statements. There are no assurances that the Company will complete the earn-in on the Elder Creek project as contemplated or at all. Factors that could cause or contribute to risks involving forward-looking statements include, but are not limited to, changes in the Company's business and other factors, including risk factors discussed in the Company's Form 10-Q for the quarter ended June 30, 2018. Except as required by law, the Company does not undertake any obligation to release publicly any revisions to any forward-looking statements.
Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accept responsibility for the adequacy or accuracy of this release.
For Further Information Please Contact:
Steven A. Osterberg, President and CEO
Tel: 208-664-4859
E-mail: info@timberline-resources.com
Website: www.timberline-resources.com
SOURCE: Timberline Resources Corp.