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Latest Economic geology Stories

2013-12-11 08:21:54

VANCOUVER, Dec. 11, 2013 /PRNewswire/ - Sierra Iron Ore Corporation (Symbol: NAA-TSXV/OTCQX:SIOCF) (the "Company") is pleased to announce that it has made significant advancements to support the Company's plan for an exploration/development field work program on the the Mazomique iron ore property. The Mazomique property is the Company's 2(nd) prospective optioned iron ore property that is expected to be in development. The Company's El Creston property recently received final...

2013-12-10 16:21:39

VANCOUVER, Dec. 10, 2013 /PRNewswire/ - Wildcat Silver Corporation (TSX: WS) ("Wildcat") announces positive results from its pre-feasibility study for its Hermosa project located in Santa Cruz County, Arizona. The pre-feasibility study includes the contribution from the projects' two primary metals, silver and electrolytic manganese metal (EMM), and three by-product metals, gold, zinc and copper. The Company also announces an updated resource estimate and an initial mineral reserve...

2013-12-09 12:22:36

HOUSTON, Dec. 9, 2013 /PRNewswire/ -- Gastar Exploration, Inc. ("Gastar") (NYSE MKT: GST) today announced that the Borrowing Base under its Senior Secured Revolving Credit Facility has been confirmed by the lending participants in the amount of $100 million, effective immediately. The Borrowing Base was previously set at $50 million. Presently, Gastar has no borrowings drawn under the revolving credit facility. The next borrowing base redetermination is scheduled to occur in May...

2013-12-05 12:23:14

-- EXCELLENT PEA RESULTS MAINTAINED: FIRST 22 YEARS OF PRODUCTION AT 27.4% Cg AND LOW OPERATING EXPENSES AT $390/TONNE -- CONFERENCE CALL WILL BE HELD TODAY AT 2PM EST MONTREAL, Dec. 5, 2013 /PRNewswire/ - Mason Graphite Inc. ("Mason Graphite" or the "Company") (TSX.V: LLG; OTCQX: MGPHF) is pleased to announce significant resource growth in an updated mineral resource estimate for its 100%-owned Lac Guéret graphite project in northeastern...

2013-12-05 08:22:37

Highlights of complete hole assays (including silver): NB-13-354: 32 metres @ 3.8 g/t Gold and 15 g/t Silver NB-13-355: 28 metres @ 3.6 g/t Gold and 22 g/t Silver NB-13-356: 29 metres @ 6.9 g/t Gold and 23 g/t Silver NB-13-358: 24 metres @ 1.3 g/t Gold and 14 g/t Silver NB-13-359: 65 metres @ 3.0 g/t Gold and 24 g/t Silver NB-13-360: 47 metres @ 1.8 g/t Gold and 32 g/t Silver TSX: KOR OTCQX: CORVF VANCOUVER, Dec. 5, 2013 /PRNewswire/ - Corvus Gold Inc. ("Corvus" or the...

2013-12-05 08:22:24

CAMBRIDGE, Mass., Dec. 5, 2013 /PRNewswire/ -- Economists at The Brattle Group released a report today that examines the likely causes and magnitudes of the feedback effects of coal plant retirements on short- and long-term wholesale electricity prices. Using a case study for the eastern PJM region, the study estimates the potential increase in energy prices due solely to the impacts of retired units withdrawn from the power supply curve to be around $3-4/MWh for on-peak hours and...

2013-12-04 16:22:04

VANCOUVER, Dec. 4, 2013 /PRNewswire/ - Sierra Iron Ore Corporation (Symbol: NAA-TSXV/OTCQX:SIOCF) (the "Company") is very pleased to announce that it has received the final local, state, and federal permits required to initiate production on the El Creston property. These permits include the Environmental Impact Statement from the Environmental Protection Authorities (SERMANAT) and the Change of Land Use permit. The next step of the permit process is to obtain the effective work...

2013-12-04 08:25:22

Web-based resource offers regular evaluations, opinions of junior mining company press releases and projects WINNIPEG, Manitoba, Dec. 4, 2013 /PRNewswire/ -- showtheplanet inc. today officially launched geologyforinvestors.com, a web-based resource offering evaluations, opinion and education on junior mining and resource sector investments. The site offers regular evaluations and opinion of junior mining company press releases and projects, reviewing data presented by real companies...

2013-12-04 04:20:18

KINSHASA, Democratic Republic of the Congo, December 4, 2013 /PRNewswire/ -- Key Points: - SMB has concluded the first phase of exploration of a major gold prospect Moku-Beverendi. - Analysis of first phase exploration is on-going. - Investment of more than $34.5 million in the project by SMB to date. - Phase 2 to begin in January, with the objective of achieving a JORC and 43-101 compliant inferred resource by...

2013-12-03 08:22:59

Following Up on Earlier High Grade Intercepts TORONTO, Dec. 3, 2013 /PRNewswire/ - Roxgold Inc. ("Roxgold" or "the Company") (TSXV: ROG) is pleased to announce that it has commenced a 5,000 metre diamond drilling program on the Bagassi South target at its 100% owned Yaramoko permit located on the Houndé Greenstone Belt in Burkina Faso. This drilling will follow up on existing results announced by the Company in press releases dated July 09, and October 31, 2013. HIGHLIGHTS...


Latest Economic geology Reference Libraries

28_71c4ddf154b94f9ae30fda80d8080e32
2005-05-26 12:03:03

Bornite is a sulfide mineral with chemical composition Cu5FeS4 that crystallizes in the cubic system. It has a brown to copper-red color on fresh surfaces that tarnishes to an iridescent purple surface. Its purple to bronze iridescence gives it the nickname peacock ore. Bornite is an important copper ore mineral and occurs widely in porphyry copper deposits along with more common chalcopyrite. It also is found in pegmatites. It is important for its copper content of about 63 percent by mass...

28_2ed8636e187bcb1f5dad0d65027dc1b5
2005-05-26 11:58:03

Cassiterite is a tin oxide mineral, SnO2. It is generally opaque, but is translucent in thin crystals. Its luster and multiple crystal faces produce a desirable gem. Cassiterite is the chief ore of tin today. Most sources of cassiterite today are found in alluvial or placer deposits containing the resistant weathered grains. The best source of primary cassiterite is the tin mines of Bolivia, where it is found in hydrothermal veins. Cassiterite is a widespread minor constituent of igneous...

28_5f496c15049ba89cd8c43810810e311e
2005-05-26 11:32:33

Chalcocite, copper(I) sulfide (Cu2S), is an important copper mineral ore. It is opaque, being colored dark-gray to black with a metallic luster. It has a hardness of 2½ - 3. It is a sulfide with an orthorhombic crystal system. Chalcocite is sometimes found as a primary vein mineral in hydrothermal veins. However, most chalcocite occurs in the supergene enriched environment below the oxidation zone of copper deposits as a result of the leaching of copper from the oxidized minerals. It is...

28_30e4ecba792d2b734beb4d32901c1f58
2005-05-26 10:41:56

Hematite (AE) or haematite (BE) is the mineral form of Iron (III) oxide, (Fe2O3), one of several iron oxides. The ore sometimes contains slight amounts of titanium. When shaped into ornaments, it is often called black diamond. Hematite is a very common mineral, coloured black to steel or silver-gray, brown to reddish brown, or red. It is mined as the main ore of iron. Varieties include Bloodstone, Iron Rose, Kidney Ore, Martite, Paint Ore, Specularite (Specular Hematite), Rainbow Hematite...

28_0ac371f570a8e0129ff11833b1cf20c7
2005-05-26 09:20:28

Magnetite is a magnetic mineral form of both iron(II) oxide and iron(III) oxide or (iron(II,III) oxide), with chemical formula Fe3O4, one of several iron oxides and a member of the spinel group. Magnetite is the most magnetic of all the minerals on Earth, and these magnetic properties led to lodestone being used as an early form of magnetic compass. Small grains of magnetite occur in almost all igneous rocks and metamorphic rocks as well as many sedimentary rocks. Magnetite is a...

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