The lake, these days much diminished in size, was once the largest freshwater lake in China, its water feeding into the Yangtze and providing an important haven for migrating birds. But when, in 2000, China shut down sand mining along the middle and lower Yangtze, the .

Mar 08, 2008 · Teaching for a new geology job market. Geotripper asks whether the sudden boom in geologist hiring is a good thing. ... during a short lived moly and shorter lived uranium "boom" and before the 1980's gold boom started. And a a time when some companies absolutely did not hire women. I was fortunate, somehow.

The whole scenario is based on microscopic grains of zircon, which lurk in many sandstones because the mineral is extremely durable. Luckily, we can determine the age of zircon grains because they're superbly suited for the gold standard of dating techniques, the uranium-lead method. Think of them like pennies with dates on them.

U-Pb geochronology is unique among geochronometers in that it is actually two separate decay systems in one. There are two relatively abundant naturally occurring isotopes of uranium, 235 U (which decays to 207 Pb) and 238 U (which decays to 206 Pb). 238 U is by far the most common (now), but every crystal or rock or anything that has 238 U ...

The source of radon is the radioactive decay of uranium. Uranium is a radioactive metal that occurs naturally in almost all places on Earth. The major isotope of uranium is 238U. 238U comprises 99% of all uranium isotopes and has a half life of 4.47 billion years. One of the daughter products produced by the decay of uranium is radon.

The post at Arizona Geology about uranium mine tailings cleanup reminded me of a trip I took down to southern Utah. On my traverse around the region (looking at the top of the Navajo Sandstone) I drove through the Uncompaghre Uplift in Colorado (Moab, UT Rt 191 along the Las Salle Mnts to Rt 46 to Paradox, CO to Rt 141 to Grand Junction, CO).

Uranium mining in Arizona has taken place since 1918. Prior to the uranium boom of the late 1940s, uranium in Arizona was a byproduct of vanadium mining of the mineral carnotite.. California. Uranium was discovered in 1954 in the Sierra Nevada of Kern County, along the Kern River about 30 miles (50 km) northeast of Bakersfield.Two mines, the Kergon mine and the Miracle mine, made small ...

One of the great crimes of the present administration in Washington D.C. was the attack upon the Bear's Ears National Monument. Even though the law didn't allow it, the park was reduced in size to 15% of what it had been before. And for the sole purpose of money, i.e. oil drilling and uranium mining. I hope the courts do the right thing this year.

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This month's Accretionary Wedge was inspired by two events demonstrating the interplay between geology and civilization. First was a segment from 'How the Earth Made Us' narrated by Prof. Iain Stewart.The snippet I saw suggested that without the Carboniferous coal deposits the industrial revolution would not have happened (from about 19 minutes). ...

384 Mineralogical controls on Uranium hydrogeochemistry from mine wastes Daryl Hockley1, Robert Bowell2, Stephen Day1 1SRK Consulting Inc.,800-580 Hornby Street, Vancouver, B.C., V6C 3B6, Canada 2SRK (UK) Limited, Summit House, 9 Windsor Place, Cardiff CF10 3RS,UK Abstract: Uranium mining creates several geochemically complex waste products. The complexity

The source of radon is the radioactive decay of uranium. Uranium is a radioactive metal that occurs naturally in almost all places on Earth. The major isotope of uranium is 238U. 238U comprises 99% of all uranium isotopes and has a half life of 4.47 billion years. One of the daughter products produced by the decay of uranium is radon.

We use inclinometers/Brunton compasses/ rulers-taped-to-protractors to determine the height of canyon walls. Once the height was calculated we determined the rate of incision using some local lava flows that have been dated. And sometimes we visit old Uranium mines. It is so cool to do such simple calculations that have real results.

Geotripper: Uranium Mining in the Grand Canyon? . · Having just returned from the Grand Canyon, I noticed with interest that the Obama administration is announcing the continuation of a moratorium on uranium mining on lands adjacent to Grand Canyon National Park.

Most of the iodine mined today is found in Chile, but some is also mined in Japan. The deposits in Chile occur as caliche. Caliche is a bit of a mystery to me, so the information that I am distilling here comes from Sirocco Mining Inc. which is a major producer of iodine.

We use inclinometers/Brunton compasses/ rulers-taped-to-protractors to determine the height of canyon walls. Once the height was calculated we determined the rate of incision using some local lava flows that have been dated. And sometimes we visit old Uranium mines. It is so cool to do such simple calculations that have real results.

One of my unofficial mottos in life is to try to always be kind to my future self. This can be expressed in so many ways. Simple things, like washing the dishes promptly after eating, when the food residue is all still easily rinsed away, rather than leaving them to pile up and become a daunting and difficult task, or remembering to always put things where they belong, so that you can find ...

This was a uranium mining district; the old roads are now used for hiking, horseback riding and biking. I found the cool photo below, annotated to show the stratigraphy of the east flank of Temple Mountain, at Cedar & Sand, a geology/adventure blog I was happy to discover. Go to Goblin Valley for more great photos of the San Rafael Reef area.

URANIUM MINING METHODS. Based on the current understanding of uranium deposits in the Commonwealth of ia, extraction of uranium ore would use open-pit mining, or underground mining, or a combination of both ().These general terms incorporate a large variety of design possibilities—there are as many methods of mining uranium as there are orebody sizes, shapes, .

Dec 29, 2008 · The geologist's 100 things meme, from Geotripper. Bold the ones you have done: 1. See an erupting volcano [Kilauea, barely oozing lava at the time, but still thrilling.] 2. See a glacier [A couple in the Alps, including the spectacular Gornergrat.One had signs showing the .

Jan 10, 2008 · In the past ten years I've fixed mass spectrometers, blasted sapphires with a laser beam, explored for uranium in a nature reserve, and measured growth patterns in fish ears, and helped design the next generation of the world's most advanced ion probe. ... Accretionary Wedge 5 and 6. ... Mining Jobs - Australia; Where I"ve been institutionalized.