The Prospector News

Brunswick Exploration Extends Strike Length of MR-4 High-Grade Mineralization to 600 Meters at Mirage

You have opened a direct link to the current edition PDF

Open PDF Close

Share this news article

Brunswick Exploration Extends Strike Length of MR-4 High-Grade Mineralization to 600 Meters at Mirage






Brunswick Exploration Inc. (TSX-V: BRW) (OTCQB: BRWXF) is pleased to report new assays from an additional thirteen drill holes completed at the Mirage Project, located in the Eeyou Istchee-James Bay region of Quebec. Drilling has continued to intersect significant intervals of high-grade (>2.0% Li2O) spodumene mineralization in the South Zone, all within dyke MR-4, showing excellent continuity of width and high-grade lithium values.


Highlights include:

  • Highest grade intercept reported to date at Mirage with 3.28% Li2O over 10.6 meters in drill hole MR-23-26 at a vertical depth of 50 meters.
  • Shallow intercept of 2.92% Li2O over 14.0 meters in drill hole MR-23-19 at a vertical depth of 46 meters.
  • 2.88% Li2O over 13.4 meters in drill hole MR-23-16 at a vertical depth of 86 meters.
  • High-grade (>2.0% Li2O) mineralization has now been reported in 9 holes in MR-4 along the entire strike length drilled to date.
  • MR-4 has been traced by drilling over a strike length of 600 meters and remains open to the northeast and at depth.
  • Assays are pending for a further 10 drill holes (MR-23-27 to MR-23-36) completed during the fall 2023 program.


Table 1: Highlights from Maiden Drilling Program at MR-4


Hole ID Zone Dyke From (m) To (m) Length (m) Li2O% Ta2O5 (ppm)
MR-23-13 South MR-4 25.3 35.7 10.4 1.45 171
MR-23-14* South MR-4 46.5 62.7 16.2 2.75 98
MR-23-15 South MR-4 91.3 104.7 15.7 2.09 49
MR-23-16 South MR-4 95.9 109.3 13.4 2.88 86
MR-23-17 South MR-4 76.0 90.1 14.1 2.24 65
MR-23-18 South MR-4 87.8 100.1 12.3 2.06 112
MR-23-19 South MR-4 68.1 82.1 14.0 2.92 70
MR-23-20 South MR-4 76.9 84.4 7.5 1.55 97
MR-23-21 South MR-4A 70.9 73.0 2.1 2.23 83
MR-23-25 South MR-4 44.7 53.6 9.0 2.57 77
MR-23-26 South MR-4 49.9 60.4 10.6 3.28 166

*Previously reported in December 4, 2023 press release; see below for MR-23-22 to -24)


Mr. Killian Charles, President and CEO of BRW, commented: “The contiguous high-grade mineralization reported today at MR-4 is impressive. We have now traced the MR-4 pegmatite over a minimum length of 600 meters with all eleven holes returning significant lithium grades. Furthermore, two of the four pegmatites drilled and announced to date at Mirage exhibit high-grade mineralization with very coarse, pale grey, strongly fluorescent spodumene crystals that suggests potential for high-quality concentrates. I am very eager to begin our winter 2024 exploration campaign that will be designed to expand upon many of these significant intercepts while drill testing for new blind targets across this exciting property.”


Figure 1: Surface Map of the Mirage Project and Drill Holes Completed to Date



South Zone Drilling


Nine of the ten holes drilled on the MR-4 dyke intersected high-grade (>2.0% Li2O) spodumene bearing pegmatite with excellent continuity and widths. The true thickness is estimated at 95% of the core length. MR-4 has now been drilled from surface to a shallow depth above 100 meters vertical and over a strike length of more than 600 metres. The dyke follows a stratigraphic contact between metasediments and metabasalts dipping southeast at a moderate angle of 45 degrees. The dyke’s surface projection is characterized by a narrow topographic depression and outcrops along a portion of its strike extent. Drill holes MR-23-21 and MR-23-22 (no pegmatite intersection in latter), both collared at the SW extremity of the current program, did not intersect a dyke at the contact potentially suggesting a pinch-out of the MR-4 dyke in this area. However, the presence of a thin, mineralized dyke in the metabasalt indicates that the South Zone remains open to the SW. MR-4 remains open to the NE and at depth (Figures 1 to 6).


Two drill holes (MR-23-23 and -24), located 350m south from the initial pegmatite outcrop discovery for MR-4, tested the down-dip projection near the SW end but did not reach the stratigraphic contacts. Both holes were stopped short of their target near the end of the fall drilling season to allow for completion of the program and will be extended during the winter 2024 drilling campaign.


Figure 2: Cross Sections A to A’ Along Dyke MR-4



Figure 3: Cross Sections B to B’ Along Dyke MR-4



Figure 4: Cross Sections C to C’ Along Dyke MR-4



Figure 5: Cross Sections D to D’ Along Dyke MR-4



Figure 6: Cross Sections E to E’ Along Dyke MR-4





All drill core samples were collected under the supervision of BRW employees and contractors. The drill core was transported by helicopter and by truck from the drill platform to the core logging facility in Val-d’Or. Each core was then logged, photographed, tagged, and split by diamond saw before being sampled. All pegmatite intervals were sampled at approximately 1m intervals to ensure representativity, and ¼ core splits were inserted regularly as duplicates. Samples were bagged; blanks and certified reference materials for lithium were inserted at regular intervals. Groups of samples were placed in larger bags, sealed with numbered tags, in order to maintain a chain of custody. The sample bags were transported from the BRW contractor facility to the ALS laboratory in Val-d’Or. All sample preparation and analytical work was performed by ALS. Samples were crushed in order for 70% of the material to pass through a 2mm screen (method CRU-31), a riffle split was made of a 1,000g sub-sample (SPL-21), and the split sample pulverized (PUL-31) to obtain more than 85% of the material inferior to 75µm. A 0.2g sub-sample of the pulverized fraction was dissolved in a sodium peroxide solution, prior to lithium analysis by ICP-AES according to the ALS method ME-ICP82b. All results passed the QA/QC screening at the lab and all inserted standard and blanks returned results that were within acceptable limits. All reported drill intersections are calculated on the basis of a lower cutoff grade of 0.10% Li2O, with maximum internal dilution of 1 meter. Host basalts adjacent to the dykes grade up to 0.3% Li2O but were excluded from the reported intersections. All drill hole collar, orientation and inclination data are available on the Company’s web site.


Clarification to Previously Announced 1Minerals Corp. Option Agreement


Under the terms of the Option Agreement with 1Mineral dated September 29, 2023 and previously announced in press releases dated October 6, 2023, BRW may elect to make share payments totaling $3,000,000 based upon the 15-day Volume Weighted Average Share Price preceding the date of each payment and subject to a Minimum Share Price of $0.66.


North Shore Lithium Project Update


In September 2023, BRW has informed Kintavar Exploration Inc. of its intention not to exercise its option to acquire 100% of the Baie-Johan-Beetz property from Kintavar previously announced in a press release dated April 19, 2022 and to discontinue exploration and evaluation activities on this property.


Qualified Person


The scientific and technical information contained in this press release has been reviewed and approved by Mr. François Goulet, Manager Quebec. He is a Professional Geologist registered in Quebec and is a Qualified Person as defined by National Instrument 43-101.


About Brunswick Exploration


Brunswick Exploration is a Montreal-based mineral exploration company listed on the TSX-V under symbol BRW. The Company is focused on grassroots exploration for lithium in Canada, a critical metal necessary to global decarbonization and energy transition. The Company is rapidly advancing the most extensive grassroots lithium property portfolio in Canada.


Posted December 19, 2023

Share this news article



First Quantum Minerals Ltd. (TSX: FM) announced that it has compl... READ MORE

February 29, 2024


Vizsla Silver Corp. (TSX-V: VZLA) (NYSE: VZLA) (Frankfurt: 0G3)... READ MORE

February 29, 2024

New Found Makes New Discovery With 35 g/t Au Over 17m Including 1,910 g/t Au Over 0.3m at “Vegas Zone”

New Found Gold Corp.  (TSX-V: NFG, NYSE-A: NFGC) is pleased to a... READ MORE

February 29, 2024

Treasury Metals Announces Results from Drilling on Far East Target at the Goliath Gold Complex

Highlights: Continuity of near surface, Goliath-style alteration ... READ MORE

February 29, 2024

Guanajuato Silver Increases Size of Gold Loan Credit Facility to US$13.3M

Guanajuato Silver Company Ltd. (TSX–V:GSVR) (OTCQX:GSVRF) i... READ MORE

February 29, 2024

Copyright 2024 The Prospector News