Chile’s Zaldivar mine asks for more time to answer questions amid Atacama water concerns

NEW YORK, NY--(Marketwire - Sep 28, 2011) - Mammoth Energy Group Inc. (PINKSHEETS: MMTE), a lithium and alternative energy mining company, announced today that its wholly owned subsidiary Compania Lithium Investments Limitada of Chile has acquired five additional concessions for a total of 2471 acres (1000 hectares) of lithium concessions located at Laguna Lagunilla situated in the Pica commune.

COLORADO SPRINGS, CO--(Marketwire - Sep 27, 2011) - Gold Resource Corporation (NYSE Amex: GORO) today announced that its Board of Directors has approved a $20 million stock repurchase program. Gold Resource Corporation is a low-cost gold producer with operations in the southern state of Oaxaca, Mexico. The Company has returned over $25 million to shareholders in monthly dividends since declaring commercial production July 1, 2010.

White Tiger Gold, a Russian exploration company, granted a $10 million credit facility to Century Mining. The two companies will be combined at the end of the year. The funds will be used to help Century Mining expand. Century Mining has operating gold mines in Quebec and Peru.

WINNEMUCCA, NEVADA--(Marketwire - Sept. 27, 2011) - Paramount Gold and Silver Corp. (NYSE Amex:PZG)(TSX:PZG)(FRANKFURT:P6G)(WKN:A0HGKQ)("Paramount Gold") announced today new high grade assay results from 10 core holes drilled on its 100% owned San Miguel Project in northwestern Mexico. Four holes drilled on the San Miguel Vein returned multiple high-grade gold and silver intercepts including 9.2 meters grading 5.56 g/T of gold and 120.14 g/T of silver and 21.95 meters grading 2.79 g/T of gold and 325.07 g/T of silver. These results are expected to upgrade inferred resources to higher categories and improve the average grade of the resource in this area.

ALBUQUERQUE, NM--(Marketwire - Sep 26, 2011) - Lone Star Gold, Inc. (OTCBB: LSTG) ("Lone Star" or "the Company") is pleased to announce the Company signed a letter of intent (LOI) on September 23, 2011, committing to the acquisition of an option to purchase a 70% interest in a gold-silver project consisting of 2 properties in Mexico: San Luis and La Colorada. The ~1409-acre (570-hectare) project is located in the municipality of Ocampo, 192 miles (310 km) from the capital city of Chihuahua, in southwest Chihuahua State. Access to the project is by paved roads with the exception of the final 19 miles (31 km).

VANCOUVER, BRITISH COLUMBIA--(Marketwire - Sept. 23, 2011) - Dorato Resources Inc. ("Dorato" or the "Company") (TSX VENTURE:DRI)(OTCQX:DRIFF)(FRANKFURT:DO5) announces receipt, from Minera Afrodita, of final drill results from the first phase of drilling at the northern-most anomaly at Cobrecon. Results indicate the presence of a large and pervasive mineralized porphyry system, drill-tested over an area of 2km x 1km (Figure 1). Grades can be considered sub-economic at 0.1% to 0.2% copper, but the presence of such a large and pervasive mineralized system is encouraging for the two remaining drill targets (Cobrecon Sur and Cobrecon Este), which are defined by larger, more intense surface geochemical anomalies. Drilling on the remainder of the targets is subject to Minera Afrodita's permitting process.

Canadian Press reported Thursday on the merger of US Gold Corp. (TSX:UXG) and Minera Andes Inc. (TSX:MAI) to form a new corporate entity called McEwen Mining.

TORONTO, ONTARIO--(Marketwire - Sept. 22, 2011) - Franco-Nevada Corporation (TSX:FNV)(NYSE:FNV) ("Franco-Nevada") and Lumina Royalty Corp. ("Lumina Royalty") have entered into an arrangement agreement whereby Franco-Nevada will acquire all of the common shares of Lumina Royalty by way of a court approved plan of arrangement for US$60 million in Franco-Nevada common shares and US$6 million in listed Franco-Nevada warrants ((TSX:FNV.WT.A) with a C$75.00 exercise price, expiring June 16, 2017). Under the arrangement, Lumina Royalty shareholders will receive 0.03487 Franco-Nevada common shares and 0.01917 Franco-Nevada warrants for each Lumina Royalty common share held.

Rapid Extraction Using Alkaline Leaching Could Benefit the Economics of Project