Quantcast
Last updated on April 18, 2014 at 10:16 EDT

Latest Petrology Stories

2011-01-21 08:15:00

TEMPE, Ariz., Jan. 21, 2011 /PRNewswire/ -- Big Bear Mining Corp (OTC Bulletin Board: BGBR) ("The Company") ("BGBR"), a U.S. based exploration company, focused on the acquisition and development of gold and other precious commodity projects, announced today results from the exploration initiative in the Rattlesnake Hills located in Natrona County, Wyoming. The Rattlesnake Hills initiative was a discovery program focused on the generation of new drill targets in the Eocene - age Rattlesnake...

2011-01-07 10:52:18

Collaborating with an international research team, an economic geologist from The University of Western Ontario has discovered how gold-rich magma is produced, unveiling an all-important step in the formation of gold mines. The findings were published in the December issue of Nature Geoscience. Robert Linnen, the Robert Hodder Chair in Economic Geology in Western's Department of Earth Sciences conducts research near Kirkland Lake, Ontario and says the results of the study could lead to a...

2010-12-07 15:35:00

VANCOUVER, Dec. 7 /PRNewswire/ - Magma Energy Corp. (TSX:MXY) advises that Magma Energy Sweden A.B. ("Magma Sweden") has provided a payment of approximately ISK 3.08 billion (USD 27 million) to Geysir Green Energy ehf ("GGE") to fund the final payment owing under the share purchase agreement between Magma Sweden and GGE pursuant to which Magma Sweden acquired its 98.53% interest in HS Orka hf.  Magma has arranged a short term loan to provide funding for this payment which loan is...

2010-10-20 08:23:00

VANCOUVER, Oct. 20 /PRNewswire/ - Commerce Resources Corp. (TSXv: CCE) (FSE: D7H) (the "Company" or "Commerce") is pleased to report that its joint venture partner Canadian International Minerals Inc. (TSXv: CIN) ("Canadian International") has commenced a minimum 1,000 metre diamond drill program on the Carbo Rare Earth Project in northeastern British Columbia. The program is designed to drill at least 12 diamond drill holes from up to 6 drill sites.  Drilling targets have been...

2010-10-07 09:00:00

VANCOUVER, Oct 7 /PRNewswire-FirstCall/ - Commerce Resources Corp. (TSXv: CCE) (FSE: D7H) (the "Company" or "Commerce") reports that it will add 1,500 metres (six holes) to the already 3,000 metres drilled this year at its Eldor Rare Earth Project located in northeastern Quebec.  The expanded program has been driven by the discovery of significant intersections of rare earth elements announced earlier this year. The Company has also...

4ea59275484a17171f244ab76f7533601
2010-09-27 07:30:00

A better way to pinpoint where volcanic eruptions are likely to occur has been produced by an international team of geophysicists. Scientists from the universities of Leeds, Purdue, Indiana and Addis Ababa, investigated volcanic activity occurring in the remote Afar desert of Northern Ethiopia between 2005 and 2009. By studying a rare sequence of 13 magmatic events "“ where hot molten rock was intruded into a crack between the African and Arabian plates "“ they found that the...

ef62695dcb0d15ac7c89d640fae0a9211
2010-09-25 06:40:00

Scientists have wondered for some time why certain seismic waves travel more quickly through the core-mantle boundary, a thin layer of the Earth's interior that lies between about 1675 and 1800 miles below the surface. Now a new study by Yale University and the University of California, Berkeley sheds light on the mystery by showing how this region behaves under the extreme conditions found so deep in the Earth. The findings, which appeared in the Sept. 24 issue of the journal Science, have...

b0932d4f292588ab0168a81f1e23b6361
2010-09-18 08:14:00

The Earth's mantle and its core mix at a distance of 2900 km under our feet in a mysterious zone. A team of geophysicists has just verified that the partial fusion of the mantle is possible in this area when the temperature reaches 4200 Kelvin. This reinforces the hypothesis of the presence of a deep magma ocean. The originality of this work, carried out by the scientists of the Institut de min©ralogie et de physique des milieux condens©s (UPMC/Universit© Paris Diderot/Institut...

2010-09-15 15:56:00

------------------------------------------------------ HIGHLIGHTS: ------------------------------------------------------ Hole FEET Total Rare Earth Oxides ------------------------------------------------------ ------------------------------------------------------ RES 09-21 93 4.08% ------------------------------------------------------...

2010-09-10 15:15:00

TSX.V: KRX www.copper-ridge.com VANCOUVER, Sept. 10 /PRNewswire-FirstCall/ - Copper Ridge Explorations Inc. (TSX.V:KRX) (the "Company") announces that it has completed a five hole 1,537 m drill program at its Duke Island copper-nickel-platinum-palladium (Cu-Ni-PGE) property in southeast Alaska (the "Property"). The Company has the right to earn up to a 65% interest in the Property from Quaterra Resources Inc. (NYSE-A: QMM / TSX-V: QTA) ("Quaterra"). Summary - Best results from the program...


Latest Petrology Reference Libraries

28_e9750264d5476c85f9be09d17bc6fd51
2005-05-26 12:03:39

Biotite is a common phyllosilicate mineral that contains potassium, magnesium, iron and aluminium. It is sometimes called "iron mica" and is found in granitic rocks, gneisses, and schists. Like other mica minerals, biotite has a highly perfect basal cleavage, its flexible sheets easily flaking off. It has a hardness of 2.5 - 3, a specific gravity of 2.7 - 3.1, is colored greenish to brown or black, and can be transparent to opaque. Biotite is occasionally found in large sheets, especially in...

28_56635877b282726a86b25cf3e98722c2
2005-05-26 11:30:45

Chert is a fine-grained silica-rich cryptocrystalline sedimentary rock that may contain small fossils. It varies greatly in color from white to black, but most often manifests as gray, brown, grayish brown and light green to rusty red; its color is an expression of trace elements present in the rock, and both red and green are most often related to traces of iron (in its oxidized and reduced forms respectively). It outcrops as nodules in limestone, chalk, and dolostone formations as a...

28_42121cee4c09c0898f52263bea588d54
2005-05-26 11:26:59

Chromite, iron magnesium chromium oxide: (Fe,Mg)Cr2O4, is an oxide mineral belonging to the spinel group. Magnesium is always present in variable amounts, also aluminium and iron substitute for chromium. Chromite is found in peridotite and other layered ultramafic intrusive rocks and also found in metamorphic rocks such as serpentinites. Ore deposites of chromite form as early magmatic differentiates. It is commonly associated with olivine, magnetite, serpentine, and corundum. Chromite is...

28_b760796d3dace508242e89fc53d49081
2005-05-26 11:13:08

In geology, a conglomerate is a rock consisting of other stones that have been cemented together. Conglomerates are sedimentary rocks consisting of subangular clasts and are thus differentiated from breccias, which consist of angular clasts. Both conglomerates and breccias are characterized by clasts larger than sand (>2 mm). There are two varieties of conglomerate, defined by texture: paraconglomerates and orthoconglomerates. Paraconglomerates are one of two varieties of conglomerate...

28_0d277ca2b0d8b8cd79fb9cfa322f77e1
2005-05-26 11:01:52

Diorite is a grey to dark grey intermediate intrusive igneous rock composed principally of plagioclase feldspar (typically andesine), hornblende, and/or pyroxene. Varieties deficient in hornblende and other dark minerals are called leucodiorite. It is often described as "salt and pepper" when composed largely of light-colored minerals randomly interspersed with dark minerals. When olivine and more iron-rich augite are present, the rock grades into ferrodiorite, which is transitional to...

More Articles (17 articles) »