- Drilling to test new infill and extension high-grade targets within western zone of the West Kasulu exploration target and newly identified southerly western zone
- Three of the only four holes previously drilled by Kincora in the western zone intersected higher grade zones, with a >1km strike identified, benefiting from significant advancements in exploration activities since limited prior drilling
- Exploration target supports one of largest copper-gold systems in Mongolia
- IP survey commences to further refine targets to the west and advance pipeline of targets across second intrusive complex
Vancouver,August 27th, 2018 – Kincora Copper Ltd. (the “Company”, “Kincora”) (TSXV:KCC) is pleased to outline recent extensive exploration activities at its wholly owned Bronze Fox project and planned activities for the remainder of the current field season. The focus of these activities are multiple new target zones proposed for drilling at, or on the margin of, the western license relating to the western zone or south-western periphery of the West Kasulu target and Bronze Fox Intrusive Complex (“BFIC”), where Kincora previously has had only one field season of unimpeded drilling activities.
Previous drilling at the western zone of the West Kasulu exploration target, across a key regional fault, inadequately tested only 260 metres of a >1km strike. Three of the four holes drilled by Kincora returned higher grade mineralization, within boarder lower grade, including hole F62 which intersected 13 metres of 1.15% Cu or 1.41% CuEq within 794 meters at 0.40% CuEq1.
SJ Geophysics Ltd. (“SJ”) has been contracted to complete a series of DC resistivity and induced polarization (“IP”) survey lines to further refine the identified high-grade targets before drilling this field season. The SJ survey will extend detailed coverage to the west and is expected to be completed in September, advancing a newly identified southerly western target zone and a second interpreted intrusive complex where surface exploration has yielded encouraging results.
Sam Spring, President & CEO of Kincora, commented: “When last drilling the western zone of West Kasulu, Kincora had a $40-50 million market capitalization, attracted NDAs with 14 industry players, an offer for the Company and separate period of exclusivity. There have only been two field seasons of unencumbered drilling at the Bronze Fox project, one by Ivanhoe (2006) and the other by Kincora (2012). Our understanding of the project has been significantly advanced since this time, with Kincora, post the IBEX merger, also now holding the dominant position in the rest of the Oyu Tolgoi-Tsagaan Suvarga copper belt”.
Senior Vice-President of Exploration, Peter Leaman, stated, “Earlier this year we announced a large-scale copper-gold exploration target. More important than this tonnage was the improved geological understanding, including the identification of a key regional fault and change in lithology that bisects the West Kasulu mineralized system at Bronze Fox.
Our team has relogged 24,000 metres of drill core and a full reinterpretation of previous geophysics has been undertaken by specialist consultant Barry de Wet. West Kasulu is already one of the largest copper-gold systems in Mongolia and with only modest drilling. Recent activities have identified a number of high priority drill targets to the west where previous exploration was impeded by access issues”.
Upon completion of the geophysical review and proposed SJ survey, specialist consultant Barry de Wet stated: “A number of significant scale and very attractive coincident geophysical anomalies have been identified at Bronze Fox, particularly in the western zone of West Kasulu that complements limited drilling and warrants priority follow up. There is an extremely large mineralized system that remains under explored at Bronze Fox, the main target zones to the west of previous drilling.
The Bronze Fox project is one that was previous excluded by Ivanhoe from the joint venture I was involved with at BHP. Successful drilling of the outlined targets is likely to attract the attention of further industry players”.
Figure 1: Bronze Fox, and its two intrusions, in the wider Southern Gobi copper belt
Background to the Bronze Fox project
The Bronze Fox project has an extensive mineralized footprint of over 40km2 within the Bronze Fox Intrusive Complex (“BFIC”) and also covering 15km2 at the western neighbouring Tourmaline Hills Intrusive Complex (“THIC”). These were supported by only two unencumbered drilling exploration field seasons (one by Ivanhoe Mines and one by Kincora) within the current two-license portfolio that hosts the full BFIC.
The BFIC includes a western central portion where 76 holes were drilled for 24,139 metres across a 1.4 km by 2.4 km zone at a prospect named by Kincora as West Kasulu (known as “Bronze Fox” by Ivanhoe Mines, who undertook drilling in 2006).
Figure 2: Mineralized system again consolidated – Drill targets advanced
Key milestones for the western license exploration target zone at Bronze Fox
Since the last drilling at the West Kasulu prospect in 2012 by Kincora, which included only 4 holes in the now defined western exploration target zone and covered a 6-month period, there have been the following key exploration activities:
- higher resolution and deeper penetrating “Search” contractor Induced Polarization (IP) survey (noting access at the time restricted just to the eastern license);
- initial lithogeochemical/petrographic studies (Professor Tony Crawford);
- Mining Associates block model and review (better understanding of faults/lithology and tonnage/grade with an independent exploration target announced);
- detailed relogging of core from drilling at West Kasulu (initially 8000m by a copper major under exclusivity, then the full 24000m reviewed and relogged by Kincora);
- further mapping and a maiden pan concentration survey on the full western license; and,
- a full geophysical review by specialist consultant Barry de Wet.
- drill targets refined by new Technical Team
The review of the West Kasulu prospect by Mining Associates announced earlier in the year (refer to the January 25th, 2018 press release) supported an exploration target of:
- 416 Mt to 428 Mt grading 0.26% to 0.30% copper for up to 2,437Mlb of copper and 0.84Moz gold, ranking as one of the largest potential in-situ copper-gold systems in Mongolia and with only modest drilling.
The underexplored and open on strike western zone included 141Mt for 890Mlb of copper and 0.25Moz gold.
- The potential quantity and grade ranges are conceptual in nature and based on nearest neighbour and ordinary krige estimates2. There has been insufficient exploration to define a mineral resource and it is uncertain if further exploration will result in the target being delineated as a mineral resource.
More important than the large-scale exploration target, the Mining Associates review included an independent block model that advanced the understanding of the mineralized system at West Kasulu, which is bisected by a key regional fault within the western central portion of the BFIC.
Since the Mining Associates review, 24,000 metres of drill core at West Kasulu has been reviewed and relogged by Kincora, benefitting from the 8000 metres previously relogged by a copper major under a period of exclusivity (when the western license was still under dispute). This relogging exercise also upgraded the geological dataset’s quality to be sufficient for NI 43-101 purposes.
Previous geophysics was excluded from the scope of the Mining Associates review. With the improved geological knowledge, relogging of core and further surface geology, specialist geophysical consultant Barry de Wet has undertaken a detailed geophysical review. This included a full reinterpretation of the Search IP survey, which was completed the year proceeding the last drilling at West Kasulu.
Resulting chargeability and conductivity interpretations correlate well with previous drilling results, the Mining Associates block model and identified faults, and various magnetic and gravity surveys. In particular, different lithologies are clearly illustrated by conductivity, with significantly more favourable chargeability profiles inadequately tested in the western sections of the system.
Demagnetisation (with clear large intrusion extending to depth) is also coincident with these higher chargeability zones on the western zone of fault, both immediately on strike from the Mining Associates block model, where 260 metres of a >1km strike was drill tested, as well as a potentially significantly larger and newly understood southerly western zone.
New high-grade infill and extension drill targets within the western zone of the West Kasulu exploration target zone and a newly identified southerly western target zone have been refined.
These include looking to test the central portion of the interpreted target on a section of the aforementioned hole F62.
The previously intersected higher grade zone in hole F62 corresponds to a coincident moderate chargeability and smaller magnetic low zone, which projects to the south of the Tov fault with strengthening chargeability resolution and thickening coincident magnetic low. This latter zone offers significant strike potential with F62 previously intersecting the interpreted periphery of the main target zone, which remains open to the west.
Success confirming the updated geophysical coincident chargeability high/magnetic low model and strike to the south of the fault with favorable grade would significantly and positively upgrade immediate target area (both tonnage and grade) and its strike potential to the west.
A similar detailed systematic approach has been undertaken at the other high priority high-grade drill targets proposed for drilling this field season.
A series of 6 North-South lines will be undertaken by the SJ survey, for 33.4 line kilometres, ahead of the proposed drill program. The survey will provide more detailed IP coverage to the west of the previous Search survey (which at the time was restricted due to access issues to the western license). The SJ survey will provide coverage across a second intrusive complex where first phase pan concentration survey results, coupled with previous geophysics, have refined a coincident area for follow up mapping and soil sampling.
SJ is a Canadian specialist geophysical group, also engaged to undertake a more detailed 3D survey at Kincora’s wholly owned East Tsagaan Suvarga project and was selected following a detailed review process with specifications of both projects targets.
- The potential quantity and grade is conceptual in nature, and based on nearest neighbour and ordinary krige estimates within an interpreted 0.2% Cu grade shell based on 81 drill holes spaced approximately 200 x 200 m within the West Kasulu prospect within the western central portion of the Bronze Fox Intrusive Complex. The drill spacing is too broad to define grade continuity, but does illustrate geological continuity. No assumptions regarding eventual economic extraction have been applied. The potential quantity and grade is conceptual in nature, there has been insufficient exploration to define a mineral resource and it is uncertain if further exploration will result in the target being delineated as a mineral resource.
- F62 – 13m of 1.15% Cu (or 1.41% CuEq) from 595m, within 37m grading 0.83% copper and 0.14g/t gold (1.01% CuEq) from 573m, within 391m @ 0.50% CuEq (0.41% copper and 0.08g/t gold) and 794m at 0.40% CuEq.
The Copper Equivalent (CuEq) calculation represents an estimate for the total value for each metal, multiplied by the conversion factor, summed and expressed in equivalent copper percentage based on spot prices (Cu $3.11/lb, Au $1279/oz and Mo $7.1/lb). Grades have not been adjusted for metallurgical or refining recoveries and the copper equivalent grades are of an exploration nature only and intended for summarizing grade. The copper equivalent calculation is intended as an indicative value only.
Qualified PersonThe scientific and technical information in this news release was prepared in accordance with the standards of the Canadian Institute of Mining, Metallurgy and Petroleum and National Instrument 43-101 – Standards of Disclosure for Mineral Projects (“NI 43-101”) and was reviewed, verified and compiled by Kincora’s geological staff under the supervision of Peter Leaman (M.Sc. Mineral Exploration, FAusIMM), Senior Vice-President of Exploration of Kincora Copper, who is the Qualified Person for the purpose of NI 43-101.