Tucson Gem and Mineral Show Interview|
February 13, 2014 |
The Arizona Geological Survey just published a special episode of Arizona Mining Review. Lee Allison interviews Peter Megaw, Exhibits Chair of The 60th Annual Tucson Gem and Mineral Show which begins today. At least 40 other gem, mineral, fossil and jewelry shows have been occurring in Tucson for the past few weeks.
Alchemists Might Have Done a Bit of Good Work?|
January 30, 2014 | Smithsonian.com
“Although scientists never could quite turn lead into gold, they did attempt some noteworthy experiments.” Quoted from the Smithsonian.com article.
Bigger and Bigger and Bigger Copper Deposits|
January 26, 2014 | Arizona Geological Survey on YouTube
Although one would expect the largest mineral deposits to be the first ones exploited, the opposite has been true for copper deposits in Arizona. The large deposits have a grade of ore that can more effectively be processed with new technologies.
In this video, Spencer Titley, a pioneer in the understanding of porphyry copper deposits, explains how some of the earliest geologic mapping done by USGS geologists in Arizona is still being used.
Copper Ore: Supergene Enrichment|
January 21, 2014 | Tucson Citizen
David Briggs has another article in the Tucson Citizen. This one on the supergene alteration and mineralization assemblages, which are formed when these sulfide-bearing deposits are exposed to near-surface, oxidizing solutions (groundwater) as they are exhumed by erosion and exposed to weathering.
What is a Porphyry Copper Deposit?|
January 14, 2014 | Tucson Citizen
The Tucson Citizen has an article that gives a good introduction to porphyry copper deposits.
The Gold Price Plunge of 2013|
January 5, 2014 | Bloomberg.com
The price of gold in January 2013 was nearly $1700 per ounce and by mid-summer it was down to just $1205… about where it closed for the year.
Most Popular Items for December|
January 2, 2014 | Geology.com
The Saturn Hexagon?
The Utah Supervolcano
What is Ammolite?
Landslide on an Incredible Scale
Failure of the Midcontinent Rift
Zoom in on the San Andreas Fault
Price of Gold Falling
Size of the Yellowstone Magma Chamber Severely Underestimated?
Salaries and Employment of Recent Geoscience Graduates
The Largest Recorded Fault Slip
How Do They Steer the Horizontal Drill?
Impact of Arizona Geology on Geologic Concepts|
January 1, 2014 | Arizona Geology
“Arizona makes up a tiny fraction of the land surface on Earth. However, it has had a comparatively larger impact on the evolution of geologic concepts, especially in three areas of geologic inquiry: (1) porphyry copper deposits, (2) metamorphic core complexes, and (3) evolution of large rivers.” Quoted from the Arizona Geology article.
Price of Gold Falling|
December 22, 2013 | Reuters
By the end of 2013, the price of gold could have its largest yearly price drop in 32 years.
Arizona Mining Review for October|
November 1, 2013 | Arizona Geological Survey on YouTube
News and events on mining in Arizona during October, 2013.
** Nyal Niemuth takes a hard look at AZ minerals industry – a lot of concern as some promising project are mothballed for lack of funds. (0:30)
** Hall Stewart of Commonwealth Silver discusses new development in one of AZ’s oldest and most productive silver properties. (8:21)
** Steve Rauzi focuses on our new AZ Oil and Gas Well viewer as a window into AZ’s subsurface and how this can inform environmental, water, minerals, oil and gas studies/exploration. (20:13)
Gold Prospecting by Picking Eucalyptus Leaves?|
October 23, 2013 | Nature
An article in Nature suggests that Eucalyptus trees might translocate gold from the ground and into their leaves, making them potentially useful in gold prospecting.
Walking Away from One of the World’s Largest Gold Discoveries?|
September 30, 2013 | Businessweek.com
A speculative article on Bloomberg Businessweek explores why Anglo American walked away from six years of work and an investment of 1/2 billion dollars in what might become one of the world’s richest gold mines.
Copper Silver and Manganese Mining in Arizona|
September 29, 2013 | Arizona Geological Survey on YouTube
The Arizona Geological Survey has a video, that features the status of copper, silver and manganese mining operations that are planned for Arizona.
It also includes an interview with the AGS digital librarian who is working to place decades of historical mining reports, maps, photos and other documents online for free public use. These documents come from government, company and personal collections and include thousands of site reports.
Gold in Pennsylvania?|
September 15, 2013 | Pennsylvania Council of Professional Geologists Newsletter
The current issue of the Pennsylvania Council of Professional Geologists Newsletter has an article titled: Panning for Gold…in Pennsylvania???.
Hydrothermal Iron in the South Atlantic?|
August 28, 2013 | University of Liverpool
“Research by the University of Liverpool has found significant levels of iron and other micronutrients flowing from a hydrothermal vent in the South Atlantic ocean.” Quoted from the University of Liverpool press release.
Recovering 60 Tons of Silver from 3 Miles of Water|
August 5, 2013 | Today.com
Last month Odyssey Marine Exploration recovered 60 tons of silver off the coast of Ireland. The silver was on the SS Gairsoppa, a British steamship that was sunk by a German U-Boat in 1941 – in waters three miles deep.
The Origin of Gold|
July 25, 2013 | USA Today
A USA Today article describes how the gold that we use on Earth today was likely born in star collisions that occurred billions of years ago.
Related: The History of Gold (USGS)
Uses of Nickel|
July 14, 2013 | USGS
“Nickel is a silvery-white metal that is used mainly to make stainless steel and other alloys stronger and better able to withstand extreme temperatures and corrosive environments.” Quoted from the USGS Fact Sheet
Fee Mining Sites
Geology.com and RockTumbler.com are
both GeoShops.com websites.
May 24, 2013 | RockTumbler.com
Lots of people enjoy going to fee mining sites where you can prospect inactive surface mines, mine tailings, soil, sediments or outcrops and keep any rocks, gems, minerals or fossils that you find. Examples include: Herkimer Diamond Mines where you can search for doubly-terminated quartz crystals, and Crater of Diamonds where you might be lucky enough to find a real diamond.
Status of the Bingham Canyon Mine Landslide|
April 28, 2013 | ABC News
ABC News has an article that looks at the status of the Bingham Canyon copper mine after a landslide has cut off production from the pit and will have the company excavating landslide debris instead of ore.
The Gold Price Plunge|
April 23, 2013 | New York Times
The price of gold has dropped over $200 in the past week. An article on the New York Times website reviews gold price trends for the past two years and explores factors that might be causing the current price changes.
The Most Costly Landslide?|
April 21, 2013 | The Landslide Blog
Dave Petley has a post about the massive landslide at the Bingham Canyon Copper Mine. Discussed are the landslide detection system used to predict the slide and the speculated financial impact of the slide.
The Falling Gold Price|
April 15, 2013 | New York Times
The price of gold has been dropping since October. A New York Times article explores recent changes in the price of gold and the potential driving forces.
Landslide in the Bingham Canyon Mine|
April 11, 2013 | Business Week
A landslide that was anticipated finally occurred in Kennecott’s Bingham Canyon Copper Mine. No one was injured.
Mercury in Groundwater|
March 29, 2013 | United States Geological Survey
USGS authors have authored a book chapter titled: “Occurrence and mobility of mercury in groundwater”.