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TORONTO, Dec. 11, 2019 (GLOBE NEWSWIRE) — Xanadu Mines Ltd (ASX: XAM, TSX: XAM) (“Xanadu” or “the Company”) is admiring to advertise cogent improvements in chestnut and gold recoveries from metallurgical testing from its flagship at Kharmagtai project, which is amid in the south Gobi arena of Mongolia (Figures 1). The new metallurgical appraisement programme has broadcast on that conducted during the 2018 Mineral Ability Appraisement (see Xanadu’s ASX/TSX advertisement anachronous 31 October 2018) and 2019 Scoping Abstraction (see Xanadu’s ASX/TSX advertisement anachronous 11 April 2019) and has produced abundant improvements in chestnut and gold accretion and in chestnut apply chestnut and gold grades.

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HIGHLIGHTS

Xanadu’s Managing Director & Chief Executive Officer, Dr Andrew Stewart, said“We are acutely admiring with these new metallurgical after-effects from Kharmagtai, which are in band with or bigger than accepted at this date in the projects action and we are adequate that added improvements can be fabricated added bottomward the track. These aboriginal date abutment appraisement after-effects are actual auspicious and announce that a accepted crushing, acerbic and abutment action will be abundant to bear adequate abstraction of the bread-and-butter minerals from the deposit. In accumulated with the low agreeable of deleterious elements, we apprehend no cogent hurdles to bearing a high-quality apply via accepted processing pathways that will be in aerial appeal from all the aloft all-around chestnut smelters, at a time the time of production.”

UPDATED METALLURGICAL TESTS FOR KHARMAGTAI

Additional metallurgical testing has been completed on the Kharmagtai Project. This appointment was conducted at SGS Canada in Vancouver, BC (“SGS”) beneath the administration of David Middleditch and Andy Holloway of AGP Mining Consultants Inc. (“AGP”). New composites, three breadth and nine airheadedness were called by Xanadu geologists with ascribe from AGP cadre to represent the capital geological and about-face domains aural the accessible pit allocation of the three absolute deposits and to be adumbrative of actual in the 2018 Mineral Ability Estimate.

Copper and gold recoveries boilerplate 89.5% and 69.7% appropriately for the two capital adept composites, alignment from 89.3% to 89.7% for chestnut and 60.8% to 78.7% for gold. Chestnut concentrates graded at an boilerplate of 25.2% Cu and 26.5g/t Au and ranged from 24.8 to 25.6% Cu and 21.5 to 30.0g/t Au.

2019 METALLURGICAL TESTWORK DESIGN AND RESULTS

The 2019 metallurgical appraisement affairs was advised to advance aloft metallurgical assumptions in the 2018 Mineral Ability Appraisement (see Xanadu’s ASX/TSX advertisement anachronous 31 October 2018) and 2019 Scoping Abstraction (see Xanadu’s ASX/TSX advertisement anachronous 11 April 2019). Three breadth composites and nine airheadedness composites were called to represent the capital geometallurgical domains aural the accessible pits advised during the 2018 Mineral Ability Estimate.

Each attenuated was run appliance the aforementioned abject ambit as the 2008 metallurgical tests as a starting point. Called composites were again optimised for the aftereffect of primary bullwork and changes to cleaner parameters, abutment times and accretion dosages. Bound aeon appraisement characteristics for the two aloft about-face domains (Albite and Chlorite-Sericite) which represent about 80% of the comminute augment from the 2018 MRE and 2019 Scoping Abstraction can be begin in Table 1.

Table 1: Bound aeon appraisement after-effects for the two capital adept composites at Kharmagtai

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2019 samples were called from all three deposits with airheadedness domains aural anniversary bead authentic by a geometallurgical archetypal developed to represent the key bedrock blazon and about-face types (Table 2 and 3).

Flotation appraisement appointment on these composites consisted of a alternation of accumulation rougher and cleaner tests with bound aeon tests conducted on the two capital Adept Composites, Ser_Chl and Alb. The bound aeon cleaner appraisement flowsheet is accustomed in Figure 2 and achievement curves for chestnut and gold are displayed in Figure 3 and Figure 4.

The key differences amid the 2008 appraisement appointment and the 2019 appraisement appointment chronicle to arch brand and sample selection. The 2008 tests were conducted on samples with chestnut and gold grades not adumbrative of the accumulated of the accessible pit mineralisation. Samples called for the 2008 appraisement appointment were not called based on metallurgical or geological domains.  In contrast, samples aural the 2019 appraisement affairs were called based on a geometallurgical archetypal developed by CSA Global, which represents adapted bedrock and about-face types throughout the three deposits. These bedrock and about-face types will represent the better airheadedness in metallurgical responses and selecting composites based on these accord a abundant added able-bodied dataset for metallurgical performance.

Table 2: 2019 metallurgical sample descriptions

Table 3: 2019 metallurgical attenuated arch brand analysis

PREVIOUS METALLURGICAL WORK AT KHARMAGTAI

In 2008, Ivanhoe Mines Ltd completed a alternation of sulphide floatation metallurgical appraisement on Kharmagtai. For added advice on these tests amuse see ASX advertisement anachronous 11th April 2019 and the NI43-101 abstruse address filed on SEDAR in October 2018.

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These were adept and angry in with metallurgical testing for the Oyu Tolgoi deposit. Samples called from Kharmagtai were from bristles appointment holes aural the three capital deposits. Sample another focused on the higher-grade actual rather than a adumbrative sample based on geological or geometallurgical domains.

In summary, a affairs of basic metallurgical testwork was completed by G&T Metallurgical Services (Kamloops, Canada) on a accumulation of nine attenuated samples from Mongolia. The samples were arise at that time to accept originated from an abstinent arena of the Oyu Tolgoi deposit; however, Xanadu can affirm that bristles of the nine attenuated samples did in actuality arise from the arena now declared as Kharmagtai.

Flotation testwork on these samples consisted of a alternation of accumulation rougher and cleaner tests. No bound aeon testing was completed.

In this work, Aerophine 3418A was acclimated as a careful chestnut sulphide beneficiary and MIBC (Methyl Iso Butyl Carbinol) was acclimated as a abutment frother. Lurid pH was adapted in the cleaner ambit appliance adhesive to access pH to a point breadth alone abstinent pyrite abutment would be expected. Insufficient appointment was conducted in this basic affairs to absolutely optimise abutment conditions.

Saleable chestnut concentrates were accomplished for all composites with boilerplate capacity of about 30% copper. At these apply levels, the accretion of chestnut ranged amid 75% and 90%, although AT 003 accomplished alone 30% accretion due to the animated levels of oxide chestnut mineralisation abstinent in this composite.

Photos accompanying this announcement are accessible at:

https://www.globenewswire.com/NewsRoom/AttachmentNg/fb4e6589-ea5b-4df4-bb35-beebe1c4fd1e

https://www.globenewswire.com/NewsRoom/AttachmentNg/6b75a81a-f964-4914-977d-20827916c320

https://www.globenewswire.com/NewsRoom/AttachmentNg/eb539ff2-5856-459e-9255-993eff792513

https://www.globenewswire.com/NewsRoom/AttachmentNg/548dea6e-43c4-4d92-b640-831f2e95396d

COMPETENT-QUALIFIED PERSON STATEMENT

The advice in this advertisement that relates to metallurgical appraisement appointment is based on a arbitrary of after-effects accumulated by Andrew Holloway who is acquiescent for metallurgical and action engineering aspects of the project. Mr. Holloway, who is a arch of AGP Mining Consultants Inc. (Toronto, Canada) and is a Professional Engineer in Ontario, Canada, has adequate acquaintance accordant to the appearance of mineralisation and blazon of bead beneath appliance and to the action he is adventure to authorize as the “Competent Person” as authentic in the 2012 Edition of the “Australasian Code for Advertisement Appraisement Results, Mineral Resources and Ore Reserves” and the Civic Apparatus 43-101.  Mr Holloway consents to the admittance in the address of the affairs based on this advice in the anatomy and ambience in which it appears.

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The advice in this advertisement that relates to appraisement after-effects is based on advice accumulated by Dr Andrew Stewart who is acquiescent for the appraisement data, comments on appraisement ambition sizes, QA/QC and geological admiration and information.  Dr Stewart, who is an agent of Xanadu and is a Member of the Australian Institute of Geoscientists, has adequate acquaintance accordant to the appearance of mineralisation and blazon of bead beneath appliance and to the action he is adventure to authorize as the “Competent Person” as authentic in the 2012 Edition of the “Australian Code for Advertisement Appraisement Results, Mineral Resources and Ore Reserves” and the Civic Apparatus 43-101.  Dr Stewart consents to the admittance in the address of the affairs based on this advice in the anatomy and ambience in which it appears.

For added information, amuse contact:

Andrew StewartChief Executive OfficerT:  61 2 8280 7497M: 61 [email protected]

APPENDIX 1: KHARMAGTAI TABLE 1 (JORC 2012)

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1.1      JORC TABLE 1 – SECTION 4 ESTIMATION AND REPORTING OF ORE RESERVES

Set out beneath is Breadth 1 and Breadth 2 of Table 1 beneath the JORC Code, 2012 Edition for the Kharmagtai project. Abstracts provided by Xanadu. This Table 1 updates the JORC Table 1 acknowledgment anachronous 28 November 2019.

1.2      JORC TABLE 1 – SECTION 1 – SAMPLING TECHNIQUES AND DATA

1.3    JORC TABLE 1 – SECTION 2 – REPORTING OF EXPLORATION RESULTS 

The chestnut agnate (eCu) adding represents the absolute metal amount for anniversary metal, assorted by the about-face factor, summed and bidding in agnate chestnut allotment with a metallurgical accretion agency applied. The chestnut agnate adding acclimated is based off the eCu adding authentic by CSA in the 2018 Mineral Ability Upgrade.

Copper agnate (CuEq or eCu) brand ethics were affected appliance the afterward formula:

eCu or CuEq = Cu Au * 0.62097 * 0.8235,

Where:

Cu  –  chestnut brand (%)

Au  –  gold brand (g/t)

0.62097-  about-face agency (gold to copper)

0.8235 –  about accretion of gold to chestnut (82.35%)

The chestnut agnate blueprint was based on the afterward ambit (prices are in USD):

1.4      JORC TABLE 1 – SECTION 3 ESTIMATION AND REPORTING OF MINERAL RESOURCES

Full geological models of all aloft geological formations were developed for anniversary deposit, and the block models were domained accordingly.Domaining of the bead mineralisation was based on the accepted compassionate of the deposits’ geology. All aloft geological formations were wireframed by Xanadu geologists appliance Leapfrog software, including porphyry phases, country rocks, arid dyke, abject of blaze credible and breccia bodies. All geological formations were domained by the akin of development of stockwork – <0.5% veining, 0.5-1.5% veining and >1.5% veining. All provided wireframe models were alien into Micromine software and accurate by CSA Global.

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The chestnut agnate (eCu) adding represents the absolute metal amount for anniversary metal, assorted by the about-face factor, summed and bidding in agnate chestnut allotment with a metallurgical accretion agency applied.

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Copper agnate (CuEq) brand ethics were affected appliance the afterward formula:

   CuEq = Cu Au * 0.62097 * 0.8235,

Where:

Cu  –  chestnut brand (%)

Au  –  gold brand (g/t)

0.62097-  about-face agency (gold to copper)

0.8235  –  about accretion of gold to chestnut (82.35%)

The chestnut agnate blueprint was based on the afterward ambit (prices are in USD):

Relative accretion of gold to chestnut = 70% / 85% = 82.35%.

The afterward access was adopted:

° Measured Resources: Not reported.° Indicated Resources: It was absitively that Indicated Mineral Resources be assigned to blocks which were explored with the appointment body not beyond about 65 m x 65 m with at atomic two mineralization intersections on appraisement lines. Geological structures are almost able-bodied accepted and interpreted.° Inferred Resources: Inferred Mineral Resources are archetypal blocks lying alfresco the Indicated wireframes, which still affectation reasonable bang chain and bottomward dip extension, based on the accepted appointment aperture and arroyo intersections.

– Classical statistical analysis,– Interpretation and wireframing of capital geological formations,– Top-cutting and breach compositing,– Domaining of the archetypal appliance akin of logging veining, breccia and area of oxidation,– Geostatistical analysis,– Block modelling and brand departure techniques,– Model classification, validation and reporting,

The about accurateness of the appraisement is reflected in the allocation of the deposit.

1.5      JORC TABLE 1 – SECTION 4 ESTIMATION AND REPORTING OF ORE RESERVES

Ore Reserves are not arise so this is not applicative to this report. 

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