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M2Cobalt is now Jervois Mining NL
M3 Metals (was ML Gold) [TSX-V:MT] - Mohave Mine Gold Project in Arizona, USA. Block 103 Iron Ore Project in Newfoundland and Labrador, Canada
MAG Silver [AMEX:MAG] [TSX:MAG] - Silver exploration in Mexico
MAS Gold (was Masuparia Gold) [TSX-V:MAS] - La Ronge Greenstone Belt
MBA Gold became Thunderbird Energy, now Gordon Creek Energy
MBMI Resources [TSX-V:MBR-H] - Nickel in the Philippines
MGold Resources is now Tanager Energy
MGX Minerals [CSE:XMG] - Driftwood Creek magnesium deposit
MK Resources was acquired by Leucadia National
M.I.M. Holdings was acquired by Xstrata plc, now Glencore
ML Gold is now M3 Metals
MLG Oz Limited [ASX:MLG] - Offers a range of value added services from bulk haulage, crushing and screening, aggregate and sand supplies through to export logistics.
MMG Limited [HK:1208] - Mid-tier global resources company that mines, explores and develops projects around the world
Mn Energy (was Pilbara Metals Group) - Battery Grade High-Purity Manganese Sulphate
MOAG Copper Gold Resources - The Highland Valley Project in British Columbia and the Molybdenum-Copper project in Ireland
MOD Resources [ASX:MOD] - Actively drilling for copper and silver in Africa (Botswana Copper Project) and gold in New Zealand (Sams Creek Gold Project)
MP Materials [NYSE:MP] - Owns and operates Mountain Pass, the only integrated rare earth mining and processing site in North America.
MPI Mines Limited - Nickel assets were aquired by LionOre Mining, which was acquired by Norilsk Nickel
Gold assets demerged in Leviathan Resources, acquired by Perseverance, became Northgate Minerals, acquired by AuRico Gold, now Alamos Gold
MRG Metals Ltd [ASX:MRQ] - Mining heavy mineral sands for their titanium and zircon content
MX Gold (cease trade order) [TSX-V:MXL] - Projects located in the Kootenay region of British Columbia
Ma'aden [SAR:1211] - Saudi Arabian Mining Company
Maca [ASX:MLD] - Contract mining, civil earthworks, crushing and screening and material haulage solutions
MacArthur Minerals [TSX-V:MMS] - Lithium and iron ore in Western Australian
MacDonald Mines Exploration [TSX-V:BMK] - Gold exploration in Ontario and Quebec, Canada.
Macmahon Holdings Limited [ASX:MAH] - Operates in the Mining and Construction sectors
MacMillan Gold was acquired by Duran Ventures. now Peruvian Metals
Macmin Silver is now Alcyone Resources
MacPhersons Resources was acquired by Intermin Resources, now Horizon Minerals
Macusani Yellowcake is now Plateau Energy Metals
Madras Aluminum is part of Vedanta Resources
Maestro Ventures is now Greatbanks Resources
Magellan Minerals was acquired by Anfield Gold, now Equinox Gold
Maghreb Minerals became Fluormin, now Vanoil Energy
Magma Metals was acquired by Panoramic Resources
Magmatic Resources [ASX:MAG] - Exploration projects (Gold, Gold/Copper porphyry and base metals) in East Lachlan, NSW, Australia
Magna Gold [TSX-V:MGR] - Primary asset is the San Francisco Gold Mine in Sonora, Mexico
Magna Resources became American Potash, now New Tech Minerals
Magna Terra Minerals (formerly Brionor Resources) [TSX-V:MTT] - Santa Cruz Province of Argentina
Magnetic Minerals was acquired by Ticor Limited, which was acquired by Kumba Iron Ore (a member of the Anglo American plc group.)
Magnetic Resources [ASX:MAU] - Gold, nickel and uranium
Magnetite Mines [ASX:MGT] - Magnetite iron ore in the Mawson Iron Province of South Australia
Magnis Energy Technologies [ASX:MNS] - Nachu Graphite Project located in South East Tanzania
Magontec [ASX:MGL] - Buys pure magnesium (Mg) and magnesium alloy scrap to produce Mg alloy ingots
Magnum Goldcorp [TSX-V:MGI] - LH Property located in the Slocan Mining Division of southeastern British Columbia
Magnum Mining and Exploration [ASX:MGU] - Australia, Namibia and South Africa
Magnum Uranium was acquired by Energy Fuels
Magnus International Resources [OTC:MGNU] - China and Africa
Magris Resources [private] - Acquires, develops and operates mining assets on a global basis
Maiden Gold merged into Sub-Sahara Resources, now Chalice Mining
Majescor Resources became Albert Mining, now Windfall Geotek
Majestic Gold [TSX-V:MJS] - Exploring for gold in China
Majestic Resources became Crown Diamonds, then merged with Petra Diamonds
Major Drilling [TSX:MDI] - Drilling service company serving the mining industry
Major General Resources is now Commander Resources
Major Precious Metals (was Eastern Zinc) [CSE:SIZE] - Skaergaard Project in Greenland
Makara Mining [CSE:MAKA] - Rude Creek (Yukon) and Kenora Gold (Ontario)
Mako Gold [ASX:MKG] - Hunting high-grade gold discoveries in West Africa
Mako Mining (merger of Marlin Gold Mining and Golden Reign Resources) [TSX-V:MKO] - La Trinidad gold mine in Mexico. Developing San Albino gold project in Nicaragua
Malachite Resources NL is now Pacific Nickel Mines
Malagasy Minerals is now Capricorn Metals
Mali Lithium is now Firefinch
Mamba Exploration [ASX:M24] - Western Australian Focused Gold, Nickel and Copper Explorer
Mamba Minerals is now Champion Iron Limited
Mammoth Resources [TSX-V:MTH] - Mexico and other geologically attractive, mining friendly jurisdictions in the Americas
Managem Group [Casablanca:7300] - Moroccan mining group, with projects in Morocco and Africa
Manas Resources [ASX:MSR] - Tien Shan gold belt, Kyrgyz Republic
Mandalay Resources [TSX:MND] - Project in Chile
Manex Resource Group - Companies include: Bravada Gold, Southern Silver Exploration, and Valterra Resource Corporation
Manganese X Energy [TSX-V:MN] - Manganese rich deposit near Woodstock New Brunswick (was Sunset Cove Mining)
Mangazeya Mining (was White Tiger Gold) [TSX-V:MGZ-H] - Non-ferrous and precious metals in the Zabaikalie Territory, Russia
Manhattan Corporation [ASX:MHC] - Uranium exploration and resource development company
Manicouagan Minerals is now Murchison Minerals
Manila Mining [PSE:MA] - Gold in the Philippines
Manitou Gold [TSX-V:MTU] - Gold Rock mining camp, east of Kenora, northwestern Ontario
Manning Ventures [CSE:MANN] - Acquisition and exploration of mineral properties, with a focus on the Yukon Territory, Canada
Mansfield Minerals became Goldrock Mines, acquired by Fortuna Silver Mines
Manson Creek Resources is now Jade Leader
Mantaro Silver [TSX-V:MSLV] - Exploration of High Grade Silver Properties in Peru
Mantle Mining is now AuStar Gold
Mantle Resources became Canada Zinc Metals, now ZincX Resources
Mantra Mining is now Tintina Resources
Mantra Resources was acquired JSC Atomredmetzoloto
Manuka Resources [ASX:MKR] - Gold & Silver producer, operating in the highly prospective Cobar Basin, New South Wales, Australia
Maple Gold Mines [TSX-V:MGM] - Douay Gold Project in the Abitibi Greenstone Belt in northern Quebec, Canada
Maple Minerals is now Mega Uranium
Marathon Gold [TSX:MOZ] - Gold projects in Newfoundland and Labrador
Marathon PGM was acquired by Stillwater Mining
Marathon Resources is now Leigh Creek Energy
Marengo Mining is now Era Resources
Marenica Energy [ASX:MEY] - Marenica Uranium Project in Namibia
Margaret Lake Diamonds [TSX-V:DIA] - Exploring for new kimberlite discoveries in Canada's Northwest Territories
Margaux Resources is now Cassiar Gold [TSX-V:MRL] - Gold districts in British Columbia
Mariana Resources was acquired by Sandstorm Gold
Marifil Mines [TSX-V:MFM] - Exploring for precious and base metals in Argentina.
Marimaca Copper [TSX:MARI] - Marimaca Project in northern Chile
Marindi Metals is now Firefly Resources
Mariner Resources is now Exploits Discovery
Marine Mining - Exploring for gold and diamonds in the offshore continental shelf of Ghana
Maritime Resources [TSX-V:MAE] - Gold in Newfoundland
Marlin Gold Mining merged with Golden Reign Resources to form Mako Mining
Marmota [ASX:MEU] - South Australia uranium
Marquee Resources [ASX:MQR] - Lithium, Clayton Valley, Nevada, USA
Marshall Lake Mining plc - 50% interest in the Marshall Lake Copper Zinc deposit located north of Thunder Bay, Ontario, Canada
Marubeni - Japanese trading company in many sectors including metals & mineral resources
Marvel Discovery [TSX-V:MARV] - Canadian projects
Marvel Gold (was Graphex Mining) [ASX:MVL] - Mali-focused gold explorer
Mascot Silver-Lead Mines [OTC:MSLM] - Little Pittsburgh Mine in the Coeur d'Alene Mining District and Argentine and Edelweiss claims southeast of Helena, Montana
Masivo Silver [TSX-V:MASS] - El Colomo Mining District, Sierra Madre, Mexico
Mason Graphite [TSX-V:LLG] - Lac Gu�ret graphite project in northeastern Quebec
Mason Resourceswas acquired by Hudbay Minerals
Mastermyne [ASX:MYE] - Mining contractor
Masuparia Gold is now MAS Gold
Matachewan Consolidated Mines [TSX-V:MCM.A] Company Summary
Matador Exploration became CBR Gold, then Niblack Mineral Development which was acquired by Heatherdale Resources
Matador Mining [ASX:MZZ] - Western Australia explorer
Matamec Explorations merged with Canada Strategic Metals to form Quebec Precious Metals
Matilda Zircon is now MZI Resources
Matrix Metals is now Caeneus Minerals
Matsa Resources [ASX:MAT] - Western Australia and South East Asia
Maverix Metals [TSX:MMX] [NYSE:MMX] - Emerging Precious Metals Royalty Company
Mawarid Mining [a wholly-owned subsidiary of MB Holding Company] - Established to explore and develop mining opportunities in Oman and internationally.
Mawson Gold [TSX:MAW] - Focused on gold exploration in Sweden
Max Resource [TSX-V:MXR] - Precious and base metals in the Americas
Maximus Resources [ASX:MXR] - Portfolio of projects with potential for the discovery of uranium, gold, copper, nickel and platinum group element (PGE) deposits
MaxTech Ventures [CSE:MVT] - Carruthers Pass Copper/Zinc/Silver/Gold project, British Columbia.
Maxy Gold was acquired by Lara Exploration
Maya Gold & Silver is now AYA Gold & Silver
Mayan Iron Corporation is now Anson Resources
Mayfair Gold [TSX-V:MFG] - Fenn-Gib gold project in Ontario, Canada
Mayur Resources [ASX:MRL] - Developing a highly prospective gold and copper exploration portfolio in Papua New Guinea
McEwen Mining [NYSE:MUX] [TSX:MUX] - High growth, low cost mid-tier silver and gold producer in the Americas
McLaren Resources [CSE:MCL] - Timmins, Ontario
MacPhersons Resources was acquired by Intermin Resources, now Horizon Minerals
McWatters Mining - Filed Bankruptcy. Sigma-Lamaque open pit in Val-d'Or, was acquired by Century Mining, became White Tiger Gold, now Mangazeya Mining
Mec Resources [ASX:MMR] - Invests in exploration companies seeking large energy and mineral discoveries
Mechel [NYSE:MTL] - Leading Russian mining and metals companies, uniting producers of coal, iron ore, nickel, steel, rolled products, and hardware
Medallion Metals (formerly ACH Minerals) [ASX:MMB] - Focused on developing the 100% owned Ravensthorpe Gold Project
Medallion Resources [TSX-V:MDL] - 7Exploring for precious and strategic metals in North America
Medgold Resources [TSX-V:MED] - Exploration licenses located in northern central Italy. (was Emerick Resources)
Medoro Resources was acquired by Gran Colombia Gold
Medusa Mining [ASX:MML] - Portfolio of exploration projects in Western Australia and the Philippines
Mega Precious Metals was acquired by Yamana Gold
Mega Uranium [TSX:MGA] - property interests are in Australia, Argentina, Mongolia, Africa and Canada
Megado Gold [ASX:MEG] - Ethiopia
MegaStar Development [TSX-V:MDV] -Gold property in the Lavincourt Township of Quebec, Val D'Or area
MegaWatt Lithium and Battery Metals (was Walcott Resources) [CSE:MEGA] - Trail Creek Mining Division in British Columbia, Canada.
MegumaGold [CSE:NSAU] - Nova Scotia Gold
Melkior Resources [TSX-V:MKR] - Acquiring diamond exploration properties in the Otish Mountain region of Quebec, Canada
Mena Resources was acquired by Rusoro Mining
Menar [private] - Focused on investing in the mineral resources and energy sectors
Menika Mining is now American Lithium
Merafe Resources [JSE:MRF] - Production and sale of ferrochrome to the stainless steel industry through the Xstrata-Merafe Chrome Venture
Merah Resources is now MinQuest
Merc International Minerals is now Nighthawk Gold
Mercator Gold is now ECR Minerals plc
Mercator Minerals filed Bankruptcy
Mercer Gold is now Tresoro Mining
Merit Mining Corporation is now Huakan International Mining
Merger Mines - Silver Valley of northern Idaho
Meridian Gold was acquired by Yamana Gold
Meridian Mining [TSX-V:MNO] - Brazil
Meridius Resources is now BMEX Gold
Merit Mining is now Huakan International Mining
Merrex Gold was acquired by Iamgold Corporation
Meryllion Resources [CSE:MYR] - Exploration projects in Argentina
Mesa Exploration [TSX-V:MSA] - Exploring for uranium in the Lisbon Valley Mining District in Southeastern Utah
Messina Minerals was acqured by Canadian Zinc, now NorZinc
Metal Bank [ASX:MBK] - Exploration projects in highly prospective regions of Queensland and Western Australia
Metal Hawk [ASX:MHKL] - Gold and nickel in the Eastern Goldfields and Albany-Fraser Range
Metal Tiger plc [LSE:MTR] - Portfolio of investments in development and exploration stage mining companies, with a current focus on copper, gold, silver and zinc
MetalCORP [TSX-V:MTC] -Actively exploring for precious metals throughout the Canadian Shield
Metalex Ventures [TSX-V:MTX] - Focused on diamond exploration in Canada, Greenland, Morocco, and Angola
Metalicity [ASX:MCT] - Cobalt, lithium and zinc
Metaliko Resources was acquired by Echo Resources, acquired by Northern Star
Metalla Royalty and Streaming [TSE-V:MTA] - Acquisition and management of precious metal royalties, streams and similar production based interests. (was Excalibur Resources)
Metallic Minerals [TSX-V:MMG] - Keno Silver Project (was Monster Mining)
Metallic Ventures Gold was acquired by International Minerals Corporation, which was acquired by Hochschild Mining
Metallica Minerals [ASX:MLM] - Developing nickel-cobalt laterite resources in the Greenvale Nickel Province of North Queensland.
Metallica Resources merged into New Gold
Metalline Mining is now Silver Bull Resources
Metallis Resources [TSX-V:MTS] - Kirkham Property situated in the heart of the prolific Golden Triangle in Northern British Columbia
Metallum is now Kopore Metals
Metanor Resources is now Bonterra Resources
Metalo Manufacturing [CSE:MMI] - Investment in Grand River Ironsands
Metalore Resources [TSX-V:MET] - Mining claims in Northwestern Ontario
Metals Australia [ASX:MLS] - Uranium in Namibia. (was Australian United Gold)
Metals Creek Resources [TSX-V:MEK] - Projects in Newfoundland, Ontario, and the Yukon
Metals Exploration [LSE:MTL] - Southeast Asia - Pacific region with immediate emphasis on the Philippines.
Metals Finance is now Pacific American Coal
Metals Group Companies include: Altiplano Metals, Benchmark Metals, and Cortus Metals
Metals X Limited [ASX:MLX] - Largest tin producer in Australia and Wingellina Nickel Project
MetalsTech [ASX:MTC] - Quebec lithium exploration
Metanor Resources is now Bonterra Resources
Meteoric Resources [ASX:MEI] - Wilthorpe gold project in the Peak Hill region of WA
Metex Resources became Carbon Energy, then delisted
Metminco is now Los Cerros Limited
Metorex Limited was acquired by Jinchuan Group
Metro Mining [ASX:MMI] - Bauxite Hills Projects in Cape York, Queensland
Mexgold Resources was acquired by Gammon Lake Resources, now AuRico Gold
Mexican Gold Corp. [TSX-V:MEX] - Las Minas property, Veracruz State, Mexico
Mexican Silver Mines became Rio Alto Mining, acquired by Tahoe Resources, acquired by Pan American Silver
Mexus Gold [OTC:MXSG] - Gold, silver, and copper in the Western United States and Northern Mexico.
Michelago Limited was acquired by Golden China Resources, acquired by Sino Gold Limited, then acquired by Eldorado Gold
Micrex Development Corporation [TSX-V:MIX] - Properties in Alberta and British Columbia (Canada) and New Mexico (USA)
Midas Gold is now Perpetua Resources
Midas Resources is now Hammer Metals
Middle Island Resources [ASX:MDI] - Focused on West Africa. (Burkina Faso, Niger and Liberia)
Midland Exploration [TSX-V:MD] - 7Properties in the Cadillac mining camp of northwestern Quebec.
Midnight Sun Mining [TSX-V:MMA] - Whitehorse Mining District, Yukon, Canada
Midway Gold - Chapter 11
Midwest Corporation is now Sinosteel Midwest Corporation
Midwinter Resources became Cobre Montana, now Lithium Australia
Mighty Beaut Minerals is now MBMI Resources
Mila Resources Plc [LSE:MILA] - Focused on Delivering High-Value Mining Opportunities
Mill Bay Ventures is now Great Thunder Gold
Millennial Lithium [TSX-V:ML] - Argentina. (was Redhill Resources)
Millrock Resources [TSX-V:MRO] - Active projects in Alaska and Arizona
Milner Consolidated Silver Mines [TSX-V:MCA-H] -
Minara Resources is now Glencore
Minaurum Gold [TSX-V:MGG] - Gold and silver exploration company in Mexico.
Minbos Resources [ASX:MNB] - Phosphate projects in Africa
Minco plc has been acquired by Dalradian Gold
Minco Capital (was Minco Gold) [TSX:MMM] - Leading miner in China
Minco Silver Corporation [TSX:MSV] - Focused on acquiring and developing high-grade, advanced-stage silver properties in China
Mincor Resources NL [ASX:MCR] - Projects in West Africa (Ghana, Guinea), East Africa (Uganda, Tanzania), and the Pacific (Fiji, Vanuatu)
Mindax [ASX:MDX] - Murchison area of the Yilgarn Shield of Western Australia
Minefinders was acquired by Pan American Silver
Minemakers is now Avenira (phosphate)
Minera Andes was acquired by McEwen Mining
Minera Alamos [TSX-V:MAI] - Portfolio of high-grade Mexican projects
Minera Aurifera Retamas (MARSA) -
Minera Camargo [private] - Exploring the Sierra Madre of Mexico for gold and base metals
Minera IRL [CSE:MIRL] - Latin American precious metals mining, development and exploration company.
Mineral Commodities [ASX:MRC] - Xolobeni Minerals Sands Project and Trekelano Copper Project
Minfocus Exploration [TSX-V:MFX] - Canadian zinc projects in British Columbia and Newfoundland
Mineral Hill Industries [TSX-V:MHI] - Praxis Gold Project, British Columbia
Mineral Mountain Mining is now Quad M Solutions
Mineral Mountain Resources [TSX-V:MMV] - Kootney Arc gold-silver project, British Columbia
Mineral Resources Limited [ASX:MIN] - Diversified Australian mining services and contracting company
Mineral Securities became CopperCo, whose assets were acquired by Cape Lambert Resources, now Cyclone Metals
Mines Management was acquired by Hecla Mining
Mingo Gold - Mines, extracts and refines gold and other precious metals. Mines diamonds and other precious stones. The company has 7 mines operating in Senegal.
Mining Projects Group is now Kairos Minerals
Minjar Gold [fully owned subsidiary of Jinan High-tech Development] - Gold exploration and production in both Western Australia and Queensland.
MinKap Resources is now Ophir Gold
Minnova [TSX-V:MCI] - Maverick Gold Project (was Auriga Gold)
Minorco combined with Anglo American to form Anglo American plc
Minotaur Gold Limited became Redport Mining Limited, acquired by Mega Uranium
Minotaur Exploration NL [ASX:MEP] - Prospecting for large-scale copper and/or zinc-lead mineralisation (JV with BHP Billiton)
Minrex Resources [ASX:MRR] - Exploration for Gold and Tin in the Deflector Extended Gold Project in Western Australia and Heemskirk Project in Tasmania
Minsud Resources [TSX-V:MSR] - Precious and base metals in Argentina
Minsur [Lima:MIN] - Peru
Mintails - Development, processing and production of gold from mining tailings
Minto Explorations was acquired by Sherwood Mining, now Capstone Mining
Minvita Enterprises is now Silver Grail Resources
Mineworx (was Iberian Minerals) [TSX-V:MWX] - Patent pending, non-toxic, environmentally friendly metallurgical extractive technology
Miocene Metals became Carube Copper, now C3 Metals
Mirabel Resources became Rocmec Mines, now Nippon Dragon Resources
Miramar Mining was acquired by Newmont
Miramar Resources [ASX:M2R] - Gold exploration projects in the Eastern Goldfields, Murchison and Gascoyne regions of Western Australia
Miramont Resources is now Kuya Silver
Miranda Gold [TSX-V:MAD] - Nevada Gold Projects
Miranda Minerals is now Union Atlantic Minerals
Mirasol Resources [TSX-V:MRZ] - Gold and silver in the Americas
Mission Gold was acquired by Northern Dynasty Minerals
Mistango River Resources [CSE:MIS] - Kirkland Lake and Thunder Bay, Ontario. Casa Berardi, Quebec (was GLR Resources)
Mitchell Services [ASX:MSV] - Leading provider of drilling services to the global exploration, mining and energy industries
Mithril Resources [ASX:MTH] - Focused exploration on nickel
Mitsubishi Materials [Tokyo:5711] - Nonferrous Metals, Cement, Fabricated Metal Products, and Advanced Materials
Mitsui Mining [Tokyo:1506]
Mkango Resources [TSX-V:MKA] - Rare earths
Mmakau Mining - Leading mining company in Africa, with investments in coal, platinum and mining services.
Moho Resources [ASX:MOH] - Queensland and Western Australia,
Mokuti Mining became Green Rock Energy, now Black Rock Mining
Moly Mines is now Young Australian Mines
Molycor Gold Corporation became Nevada Clean Magnesium is now Western Magnesium
Monarca Minerals [TSX-V:MNN] - Silver and gold projects in Mexico (was Oremex Silver)
Monarch Gold Mining became Swan Gold Mining, became Eastern Goldfields is now Orabanda Mining
Monarch Mining [TSX:GBAR] - Projects in the Abitibi mining camp in Quebec, Canada
Monax Mining is now Auteco Minerals
Moneta Porcupine Mines [TSX:ME] - Operating exclusively in the Porcupine Mining Camp near Timmins, Ontario
Monger Gold [ASX:MMG] - Projects in Western Austrlia
Monster Copper was acquired by Mega Uranium
Monster Mining is now Metallic Minerals
Mont Royal Resources [ASX:MRZ] - Edjudina Project and the Yule River Project, Western Australia.
Montage Gold [TSX-V:MAU] - Morondo Gold Project
Montague Resources NL is now Cullen Resources NL
Montan Mining is now Fidelity Minerals
Montana Gold Mining Company is now Peloton Minerals
Montana Resources - Operates the Continental Pit, a Cu-Mo open pit mine, near Butte, Montana
Montego Resources [CSE:MY-X] - Taylor Project, located in White Pine County, NV;
Montemor Resources became European Gold Resources, now Galantas Gold
Monterey Minerals [CSE:MREY] - Cobalt Mountain Property in central British Columbia
Montero Mining and Exploration [TSX-V:MON] - Focused on rare earth element (REE), uranium and phosphate deposits in Tanzania and Canada
Montezuma Mining is now Element 25
Montoro Resources is now International Montoro Resources
Monument Mining [TSX-V:MMY] - Gold in Malaysia
Morgain Minerals merged with Aurogin Resources to form Castle Gold Corporation, now Argonaut Gold
Morien Resources [TSX-V:MOX] - Projects in Nova Scotia
Morumbi Resources is now Ascendant Resources
Mosaic Minerals [CSE:MOC] - Quebec Mineral Exploration
Mosquito Consolidated Gold is now American CuMo Mining
Moss Lake Gold Mines was acquired by Wesdome Gold Mines
Motapa Diamonds was acquired by Lucara Diamond
Moto Gold Mines was acquired by Randgold Resources, than was acquired by Barrick Gold
Mount Burgess Mining [ASX:MTB] - Active projects in Australia and Namibia
Mt. Dimer Gold Mines became Regal Resources. now Nzuri Copper
Mount Gibson Iron [ASX:MGX] - Australia's leading independent "pure-play" hematite iron ore producer
Mt Isa Metals became Orbis Gold, acquired by SEMAFO which was acquired by Endeavour Mining (July 2, 2020)
Mt. Kersey Mining became Gutnik Resources, then Great Gold Mines and is now Hawthorn Resources
Mount Ridley Mines [ASX:MRD] - Projects in the Fraser Range region with the potential to host major mineral deposits in base and precious metals. (was AXG Mining)
Mountain Boy Minerals [TSX-V:MTB] - Extensive mineral holdings in the Stewart area of northwestern B.C. as well as in the central area of British Columbia
Mountain Lake Resources [CSE:MLK (suspended)] - 25% interest in diamond mine in the Ventersdorp District of South Africa (JV with Etruscan Resources)
Mountain Province Diamonds [AMEX:MPVD] - Exploration/development company with a major diamond find in the Northwest Territories of Canada
Moydow Mines International was acquired by Franco-Nevada Corporation
Mundoro Capital [TSX-V:MUN] - China and South Eastern Europe projects
Mungana Goldmines became Atherton Resources, acquired by Auctus Minerals
Murchison Minerals [TSX-V:MUR] - Mineral properties in Canada and East Africa.
Murgor Resources was acquired by Alexandria Minerals, then acquired by O3 Mining
Musgrave Minerals Limited [ASX:MGV] - Exploration for nickel-copper sulphide deposits, copper-gold and Platinum Group Element mineralisation in the Musgrave region of South Australia
Musk Metals [CSE:MUSK] - Lithium Exploration
Muskox Minerals became Prize Mining, now Boundary Gold and Copper Mining
Muskrat Minerals is now Metalo Manufacturing - Investment in Grand River Ironsands
Mustang Alliances [OTC:MSTG] - Gold and silver deposits in the Choluteca district of southern Honduras
Mustang Minerals is now Grid Metals
Mutiny Gold became Doray Minerals, now Silverlake Resources
Mvelaphanda Resources was acquired by Northam Platinum
Myanmar Metals (was Top End Minerals) [ASX:MYL] - Bawdwin Project

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