Archer, Cathro & Associates (1981) Limited Thorn Property NI 43‐101 Report Thorn Property NI 43‐101 Technical Report Sutlahine River Area, British Columbia Atlin Mining Division NTS 104K/7W, 10W BCGS 104K/046, 047, 056, 057, 066 58° 34’ North Latitude 132° 50’ West Longitude Prepared for: Brixton Metals Corporation 409 Granville Street, Suite 551 Vancouver, BC, Canada V6C 1T2 Prepared by: Heather Burrell, B.Sc., P.Geo. and Andre M. Deiss, B.Sc. (Hons), Pr.Sci.Nat. Effective Date: June 23, 2021 Signature Date: June 23, 2021 Archer, Cathro & Associates (1981) Limited Thorn Property NI 43‐101 Report SIGNATURE PAGE Thorn Property NI 43‐101 Technical Report Effective Date: June 23, 2021 Prepared for: Brixton Metals Corporation 409 Granville Street, Suite 551 Vancouver, BC, Canada V6C 1T2 June 23, 2021 ____________________________________ Heather Burrell, B.Sc., P.Geo. June 23, 2021 ____________________________________ Andre M. Deiss, B.Sc. (Hons), Pr.Sci.Nat. Signature Date: June 23, 2021 ii Archer, Cathro & Associates (1981) Limited Thorn Property NI 43‐101 Report TABLE OF CONTENTS SIGNATURE PAGE......................................................................................................................................... II TABLE OF CONTENTS ................................................................................................................................. III LIST OF FIGURES ......................................................................................................................................... IX LIST OF TABLES ........................................................................................................................................... XI LIST OF ABBREVIATIONS ......................................................................................................................... XIII 1 SUMMARY ............................................................................................................................................... 1 PROJECT DESCRIPTION ............................................................................................................................................ 1 1.1 GEOLOGY AND MINERALIZATION ................................................................................................................. 1 1.2 EXPLORATION HISTORY AND SIGNIFICANT RESULTS .................................................................................. 3 1.3 INTERPRETATION AND RECOMMENDATIONS ................................................................................................ 4 1.4 INTERPRETATION AND RECOMMENDATIONS ................................................................................................ 4 2 INTRODUCTION ..................................................................................................................................... 6 3 RELIANCE ON OTHER EXPERTS ........................................................................................................ 6 4 PROPERTY DESCRIPTION AND LOCATION ...................................................................................... 7 4.1 LOCATION ..................................................................................................................................................... 7 4.2 MINERAL TENURE ........................................................................................................................................ 8 4.3 UNDERLYING AGREEMENTS ...................................................................................................................... 15 4.4 PERMITS AND AUTHORIZATIONS ................................................................................................................ 15 4.5 ENVIRONMENTAL CONSIDERATIONS .......................................................................................................... 16 4.5.1 Protected Areas ................................................................................................................................... 16 4.5.2 Area-Specific Resource Management Zones ................................................................................. 17 5 ACCESSIBILITY, CLIMATE, LOCAL RESOURCES, INFRASTRUCTURE, AND PHYSIOGRAPHY 18 5.1 ACCESSIBILITY ........................................................................................................................................... 18 5.2 LOCAL RESOURCES & INFRASTRUCTURE ................................................................................................. 18 5.3 PHYSIOGRAPHY & CLIMATE ....................................................................................................................... 18 6 HISTORY ................................................................................................................................................ 19 6.1 1951 TO 1970 ............................................................................................................................................ 20 Julian Mining Company ................................................................................................................................................ 20 American Uranium Limited ........................................................................................................................................... 21 Can. Johns-Manville and Centex Mines ..................................................................................................................... 21 Taku Syndicate .............................................................................................................................................................. 21 6.2 1972 TO 1980 ............................................................................................................................................ 21 6.3 1981 TO 1985 ............................................................................................................................................ 21 Signature Date: June 23, 2021 iii Archer, Cathro & Associates (1981) Limited Thorn Property NI 43‐101 Report Chevron ........................................................................................................................................................................... 22 6.4 1986 TO 1988 ............................................................................................................................................ 22 Inland Recovery Group Ltd. and American Reserve Mining Corporation.............................................................. 22 Chevron ........................................................................................................................................................................... 22 Noranda, Cominco, and Platinum Syndicate ............................................................................................................. 22 6.5 1989 TO 1991 ............................................................................................................................................ 23 6.6 1991 TO 1998 ............................................................................................................................................ 23 Clive Aspinall .................................................................................................................................................................. 23 Kohima Pacific Gold Corporation ................................................................................................................................ 23 6.7 2000 TO 2005 ............................................................................................................................................ 23 Rimfire Minerals ............................................................................................................................................................. 24 First Au Strategies Corporation and Cangold Ltd. .................................................................................................... 24 Cangold and Rimfire ..................................................................................................................................................... 25 6.8 2006 TO 2009 ............................................................................................................................................ 25 6.9 2010 TO 2013 ............................................................................................................................................ 26 6.10 2014 ........................................................................................................................................................... 26 6.11 2015 ........................................................................................................................................................... 26 6.12 2016 TO 2019 ............................................................................................................................................ 26 6.13 HISTORICAL MINERAL RESOURCES ........................................................................................................... 35 7 GEOLOGICAL SETTING AND MINERALIZATION ............................................................................. 37 7.1 REGIONAL GEOLOGY ................................................................................................................................. 37 7.2 REGIONAL MINERALIZATION .....................................................................................................................