Quaterra Closes C$2.48 Million Financing With Goldcorp

VANCOUVER, BRITISH COLUMBIA, Apr 12, 2012 (MARKETWIRE via COMTEX) — Quaterra Resources Inc. today announced that the NYSE Amex and TSX Venture exchanges have approved the purchase of 4,000,000 common shares of the Company at a price of C$0.62 per share by Goldcorp Inc., raising a total of C$2.48 million.

Mammoth Appoints New CEO

Mammoth Resources Corp. is pleased to announce the appointment of Mr. Thomas Atkins as President and Chief Executive Officer of the Company effective immediately. Mr. Atkins is an accomplished mining executive who has successfully lead exploration and development projects throughout the Americas over the past 28 years. He has an extensive background in mineral exploration, investment banking, investor relations, executive management and corporate governance. Mr. Atkins was formerly the CEO of such companies as Rockex Ltd. (now Rockex Mining, a TSX listed iron ore exploration company), Castle Gold Corp. (a Mexican and Guatemalan gold producing company acquired in 2010 by Argonaut Gold Inc. (a TSX listed gold producer)) and Crowflight Minerals Inc. (a TSX listed nickel mining company).

Capstone 2012 First Quarter Production Results

Capstone Mining Corp. today announced its operating results for the three months ended March 31, 2012 for its two operating mines, Cozamin and Minto. Combined production totalled 18.6 million pounds of copper in concentrates with additional by-products of lead, zinc, silver and gold.

San Marco Stakes 156 sq. km Adjacent to Los Carlos Property

San Marco Resources Inc. has acquired by staking, 156 sq. km of highly prospective land (Los Carlos II) adjacent to the Company’s 100% optioned Los Carlos property, where drilling is currently testing the western portion of one of 4 known gold/silver surface occurrences. The Los Carlos II property (15,600 ha.) is located in the prolific “Megashear” in Sonora State, Mexico. Goldgroups Sierra Colorado mine is located 18km to the northwest and Timmins Gold’s San Francisco mine is 85 km to the east.

Goldgroup Announces Completion of PEA on Caballo Blanco Indicating Robust Project Economics of 66% Pre-Tax IRR and US$284 million Pre-Tax NPV and Provides Corporate Update

Goldgroup Mining Inc. is pleased to announce initial positive results from a Preliminary Economic Assessment for the Company’s 100%-owned Caballo Blanco gold project located in the State of Veracruz, Mexico. Based on the PEA, the Caballo Blanco project is expected to generate a 66.4% pre-tax internal rate of return (“IRR”) and a US$283.8 million pre-tax net present value (“NPV”) at a 5% discount rate, over an approximate 7.5-year mine life and produce 687,000 ounces of gold and 1.3 million ounces of silver, based on the current mineable resource determined from the Whittle optimization model. A technical report entitled “Minera Cardel Resource Corp. — Caballo Blanco Gold Heap Leach Preliminary Economic Assessment” will be completed within 45 days and will be filed on SEDAR and the Company’s website.

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