Taxonomy term

usgs

Mineral Resource of the Month: Ferrous Slag

Ferrous slag is a byproduct of iron- and steelmaking. It is produced through the addition of materials such as limestone, dolomite, lime and silica sand to blast furnaces and steel furnaces to strip impurities from iron ore, scrap and other ferrous feeds, and to lower the heat requirements of the iron- and steelmaking processes. The slag forms as a dominantly calcium silicate melt that floats on top of the molten crude iron or steel; the slag is then removed from the liquid metal. 

 
14 Aug 2009

New USGS chief appointed

Blogging on EARTH

It looks like the next head of the U.S. Geological Survey will be the Monterey Bay Aquarium Research Institute's current president and CEO, marine geophysicist Marcia McNutt.

EARTH/Geotimes did a profile of her back in 2005 - it's here.

13 Jul 2009

Energy Notes: February 2008-2009

Oil and petroleum imports data are preliminary numbers taken from the American Petroleum Institute’s Monthly Statistical Report. For more information visit www.api.org.

 
20 Jun 2009

Mineral Resource of the Month: Pumice and Pumicite

Pumice is an extremely light, highly porous extrusive volcanic rock, formed through the rapid cooling of air-pocketed lava. In fact, some pumice is so light that it can float on water. Although pumice is often light in color as well, depending on its mineral makeup, it can vary from white to pink to gray to black. Fine-grained pumice, or pumicite, is made up of minute grains, flakes, threads or shards of volcanic glass that are finer than four millimeters. Pumicite and volcanic ash are descriptive terms and are often used interchangeably.

 
14 Jun 2009

Energy Notes: January 2008-2009

Oil and petroleum imports data are preliminary numbers taken from the American Petroleum Institute’s Monthly Statistical Report. For more information visit www.api.org.

 
20 May 2009

Mineral Resource of the Month: Thorium

Thorium is a naturally occurring radioactive element usually found with other minerals, such as monazite in alkalic igneous deposits and carbonatites. 

 
14 May 2009

Mineral Resource of the Month: Bromine

Bromine, a naturally occurring element, is comparatively rare in Earth’s crust, but is found as a dissolved species in seawater, saltwater lakes and underground brines associated with petroleum deposits. Seawater contains about 65 parts per million of bromine — or an estimated 100 trillion tons, whereas the highly salty Dead Sea is estimated to contain 1 billion tons of bromine. Bromine is also recovered from seawater as a co-product during evaporation to produce salt. 

 
14 Apr 2009

Energy Notes: November 2007-2008

Oil and petroleum imports data are preliminary numbers taken from the American Petroleum Institute’s Monthly Statistical Report. For more information visit www.api.org.

 
20 Mar 2009

Mineral Resource of the Month: Iodine

Désirée E. Polyak, a mineral commodity specialist for the U.S. Geological Survey, compiled the following information on iodine, an essential trace element vital to the production of thyroid hormones.

14 Mar 2009

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