All Articles
Gondwana Gold and Diamonds
October 2002 by Edgar B. Heylmun, PhD
Some 250 million years ago, the Earth had just one supercontinent, known as “Pangaea.” For whatever reason, the supercontinent began to break apart. South America and Africa remained joined, as “Gondwana,” until 65 million years ago, when they split apart. The obvious “fit” of South America with Africa was noted by geologists back in the 19th century, but it was not until Alfred Wegener came out with his “continental drift” hypothesis in 1912 that people took note.Additional articles that might interest you...
Picks & Pans: Sniping for Low Stream Gold
September 2003
In southwestern Canada a couple of summers ago, the weather was extremely dry. So dry in fact, that some of the streams were at lows not seen in many decades. The wonderful advantage for sniping in the following fall was that...
In southwestern Canada a couple of summers ago, the weather was extremely dry. So dry in fact, that some of the streams were at lows not seen in many decades. The wonderful advantage for sniping in the following fall was that...
Looking Back
October 2004
Excerpts for CMJ published 50 years ago this month.
Excerpts for CMJ published 50 years ago this month.
Building A Mine—Dust Devil Sunstones
August 2008
Establishing a gemstone mine, like any other mining operation, is a difficult proposition. This is especially true if you are starting out from scratch without loads of money to get the business going.
Establishing a gemstone mine, like any other mining operation, is a difficult proposition. This is especially true if you are starting out from scratch without loads of money to get the business going.
Endangered Species Act is a Mess
June 2004
You’ve likely read about some of the problems with the Endangered Species Act (ESA) in the Legislative Update section, and in previous issues of our publication. The problems never seem to end, and it is way past the time for reform. A current story highlights some of these problems.
You’ve likely read about some of the problems with the Endangered Species Act (ESA) in the Legislative Update section, and in previous issues of our publication. The problems never seem to end, and it is way past the time for reform. A current story highlights some of these problems.
Gangue Minerals - What Do They Tell Us?
January 2017
There are a large number of different kinds of gangue minerals, and each of them has its own tale to contribute to the story of the chemistry and geology of a deposit.
There are a large number of different kinds of gangue minerals, and each of them has its own tale to contribute to the story of the chemistry and geology of a deposit.
What Was That Article Again?
July 2010
Have you ever waded through your pile of Mining Journals looking for a particular article? The annual index, published each December is a great help, but I have a better idea.
Have you ever waded through your pile of Mining Journals looking for a particular article? The annual index, published each December is a great help, but I have a better idea.
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