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Latest Economic geology Stories

2015-03-31 08:28:51

WINNIPEG, March 31, 2015 /PRNewswire/ - San Gold Corporation (TSX-V: SGR) ("San Gold or the "Company") today announced an updated mineral reserve and resource estimate for its Rice Lake Mining Complex. During

2015-03-31 08:26:12

JOHANNESBURG, March 31, 2015 /PRNewswire/ -- Gold Fields Limited (Gold Fields) (JSE, NYSE, NASDAQ Dubai: GFI) today publishes its Integrated Annual Report 2014 and a number

2015-03-30 12:24:34

TSX: SVL NYSE MKT: SVLC VANCOUVER, March 30, 2015 /PRNewswire/ - SilverCrest Mines Inc.

2015-03-30 08:23:56

TORONTO, March 30, 2015 /CNW/ - Alacer Gold Corp. ("Alacer" or the "Corporation") [TSX: ASR and ASX: AQG] is pleased to announce an update to its Mineral

2015-03-27 12:23:40

Symbol: ASX: CHN TSX: CXN Shares outstanding: 282 million Fully diluted: 287 million ---------------------------------------------

2015-03-26 12:24:26

VANCOUVER, March 26, 2015 /PRNewswire/ - International Tower Hill Mines Ltd. ("ITH" or the "Company") - (TSX: ITH) (NYSE-MKT: THM) is pleased to announce that Mr. Karl L.

2015-03-26 08:26:04

Shares Issued and Outstanding: 135,204,550TSX: MPVNASDAQ: MDM TORONTO and NEW YORK, March 26, 2015 /PRNewswire/ - Mountain Province Diamonds Inc.

2015-03-26 08:25:01

Open Pit and Underground Indicated Resources at Wassa Grow to 3.5 Million Ounces TORONTO, March 26, 2015 /PRNewswire/ - Golden Star is pleased to announce its Mineral Reserves and Mineral

2015-03-25 20:21:32

TSX-V: JAG Highlights -- Proven and probable gold reserves at Turmalina increased by 51% to 217,000 ounces of gold, while the average proven and probable

2015-03-25 08:25:14

VANCOUVER, March 25, 2015 /PRNewswire/ - Sarama Resources Ltd ("Sarama" or the "Company") and Acacia Mining plc ("Acacia") entered in to an Earn-In Agreement ("Agreement")


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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Word of the Day
bowerly
  • Large; stout; burly.
The word 'bowerly' is an alteration of 'burly'.