Geology, Geophysics, and Geochemistry Science Center

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Image shows a man examine rock layers
December 31, 2015

USGS Scientist Examining Texas Rock Layers for Finchite Minerals

USGS scientist Bradley Van Gosen examines rock layers for the newly discovered mineral finchite near Lamesa, Texas. Van Gosen was the first to recognize the existence of the new mineral, which was named for long-time USGS uranium geologist Warren Finch. Read more about our uranium research here

Image shows a dry creek bed with two men standing on the banks
December 31, 2015

USGS Scientists Seeking Finchite by the Sulfur Springs Draw in Texas

Between Lamesa and Big Spring, Texas, runs the Sulfur Spring Draw, a dry creek. It's the site of an economic calcrete-type uranium deposit, the Sulfur Springs Draw Deposit, where a new mineral was discovered in 2015. The mineral, first observed by USGS scientist Bradley Van Gosen, is a uranium-mineral named finchite after long-time USGS uranium geologist Warren Finch. Read

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Image shows a rock outcropping surrounded by desert vegation
December 31, 2015

Calcrete near Sulfur Springs Draw

A calcrete outcropping near Sulfur Springs Draw in Texas. This deposit dates to the Pliocene and Pleistocene, and hosts uranium-vanadate minerals.

Image shows a landscape of the Southern High Plains
December 31, 2015

The Southern High Plains

The Southern High Plains of New Mexico, Oklahoma, and Texas. USGS conducted a uranium assessment in this region in 2015.

Image shows a detail of a yellow mineral on white rock
December 31, 2015

Uranium-Vanadate Mineral in Calcrete

A uranium-vanadate mineral in calcrete. This sample came from near the Sulfur Springs Draw in Texas. USGS conducted an assessment of uranium resources in this region in 2015.

microscopic gold and lead particles
December 31, 2015

Microscopic Gold and Lead Particles

Microscopic gold and lead particles surrounded by organic and phosphorus-rich material in a municipal biosolids sample (combined surface topography and atomic weight images).

Bluish-gray elongate amphibole bundles found in samples of commercial expanded vermiculite ore from Libby.
May 5, 2013

Bluish-gray elongate amphibole bundles found in samples.

Figure 2. Bluish-gray elongate amphibole bundles found in samples of commercial expanded vermiculite ore from Libby.

Concord mine
November 8, 2012

Concord Heavy-Mineral Sands Mine

The Concord heavy-mineral-sands mine of Iluka Resources in south-central Virginia. The mine excavates sand-silt deposits that contain about 4 percent heavy minerals, which were deposited along a shoreline that existed here between 3.5 and 3.0 million years ago. These

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 Figure 3.   Secondary electron images of elongate amphibole bundles from the sink fractions of commercial expanded vermiculite
May 5, 2012

Secondary electron images of elongate amphibole bundles.

Figure 3. Secondary electron images of elongate amphibole bundles from the sink fractions of commercial expanded vermiculite ore.

Red Mountain CO
April 22, 2012

Red Mountain, CO Hydrothermal Alteration

Photo showing intense acid-sulfate hydrothermal alteration on Red Mountain No. 2, Silverton CO. View is looking to the west across Corkscrew Gulch. 

Image: Supergene Leached Zone at Silver Bell Mine
January 1, 2010

Supergene Leached Zone at Silver Bell Mine

Supergene Leached zone at Silver Bell Mine, AZ.