Quantcast

Latest Economic geology Stories

2014-09-26 16:21:52

BRISTOL, Va., Sept. 26, 2014 /PRNewswire/ -- Updating its announcement of July 31, Alpha Natural Resources, Inc.

2014-09-25 23:09:56

Exprodat, the oil and gas GIS services, software and training supplier, has released a new version of Exploration Analyst, its popular and widely used petroleum exploration and new ventures software.

2014-09-25 16:23:01

VANCOUVER, Sept. 25, 2014 /PRNewswire/ - Sandstorm Gold Ltd.

diamond nanothreads
2014-09-24 04:54:11

Currently, heading off into space requires a shuttle, rocket or some sort of high velocity vehicle with enough power to push through Earth's atmosphere. What if you could take a "space elevator" instead?

2014-09-24 04:22:18

DUBLIN, September 24, 2014 /PRNewswire/ -- Research and Markets ( http://www.researchandmarkets.com/research/c4wwkc/wireline_logging) has announced the addition of the

2014-09-22 08:22:32

VANCOUVER, Sept. 22, 2014 /PRNewswire/ - Capstone Mining Corp.

2014-09-19 16:21:39

BRISTOL, Va., Sept. 19, 2014 /PRNewswire/ -- Alpha Natural Resources, Inc.

2014-09-19 08:22:51

VANCOUVER, Sept. 19, 2014 /PRNewswire/ - Brazil Resources Inc.


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...

More Articles (7 articles) »
Word of the Day
shavie
  • A trick or prank.
The word 'shavie' is related to 'shave'.