Thor Mining : 20/06/2017 Completion of Dundas drilling

20 June 2017

Company Announcements Office, ASX Securities Limited, 20, Bridge Street, Sydney, N.S.W. 2000 DUNDAS GOLD PROJECT - WESTERN AUSTRALIA COMPLETION OF BEDROCK GEOCHEMISTRY DRILL PROGRAM

The Directors of Thor Mining PLC ("Thor" or the "Company") (AIM, ASX: THR), are pleased to advise completion of the bedrock geochemistry drilling at the Dundas Project in southern Western Australia (Figure 1).

THOR MINING PLC

Registered Numbers: United Kingdom 05 276 414

Australia 121 117 673

Registered Office: 58 Galway Avenue

MARLESTON, SA, 5035

Australia

Ph: [phone]

Fx: [phone]

Email:[e-mail]

Website: www.thormining.com

@ThorMining

Enquiries: Mick Billing

Executive Chairman Thor Mining PLC

[phone]

Nominated Advisor Colin Aaronson Grant Thornton

[phone]

ASX Listings: Shares: THR

AIM Listings: Shares: THR

Directors: Michael Billing David Thomas Gervaise Heddle Paul Johnson Alastair Middleton

Key Projects:

• Tungsten

Molyhil NT

Pilot Mountain USA

Figure 1. Dundas Project Location

Mr Mick Billing, Executive Chairman of Thor: "All targets on this 50 hole program have been tested, with the program finishing inside both time and the estimated budget of A$100,000. We expect receipt of assays in several weeks and it is hoped that the results will show elevated gold levels in bedrock and warrant further deeper reverse circulation (RC) drilling."

Figure 2. Albany Fraser Belt showing Dundas location

About the Dundas Project

The Thor Dundas Project is situated in Western Australia within the Albany-Fraser Province. The project tenement is situated in the prospective Albany-Fraser belt (Figure. 2) where the trend of the belt is displaced south-eastwards by about 50km co-incident with the general strike-extension of the most prolific gold-bearing belt of the Yilgarn Province - the Wiluna-Kalgoorlie-Norseman greenstone belt. The Albany-Fraser belt hosts a number of gold discoveries including the +8 million ounce Tropicana gold deposit, and other closer discoveries.

Thor Mining holds 60% equity in the Dundas project along with rights to increase that equity to 100%.

For further information, please contact:

THOR MINING PLC

Mick Billing Executive Chairman

[phone]

Competent Person's Report

The information in this report that relates to exploration results and exploration targets is based on information compiled by Richard Bradey, who holds a BSc in applied geology and an MSc in natural resource management and who is a Member of The Australasian Institute of Mining and Metallurgy. Mr Bradey is an employee of Thor Mining PLC. He has sufficient experience which is relevant to the style of mineralisation and type of deposit under consideration and to the activity which he is undertaking to qualify as a Competent Person as defined in the 2012 Edition of the 'Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves'. Richard Bradey consents to the inclusion in the report of the matters based on his information in the form and context in which it appears.