Geology, Geophysics, and Geochemistry Science Center

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Three geologists looking at igneous textures in granitic rocks hosting gold
August 5, 2021

Three geologists looking at igneous textures in granitic rocks

Alaska Science Center geologist Doug Kreiner and University of Alaska, Fairbanks professor Sean Regan look at igneous textures in granitic rocks hosting gold at the Pogo gold mine with Pogo exploration geologists. This is a new collaborative study with USGS, UAF and Pogo Mine, to collaborate on unraveling the genesis of Pogo, an important producer of gold in Alaska with

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Geologists discuss the district-scale geology during a field visit at Pogo Mine, Alaska
August 5, 2021

Geologists discuss the district-scale geology at Pogo Mine, Alaska

Alaska Science Center geologist Doug Kreiner and University of Alaska, Fairbanks professor Sean Regan discuss the district-scale geology with the chief exploration geologist at Pogo Mine. This is a new collaborative study with USGS, UAF and Pogo Mine, to collaborate on unraveling the genesis of Pogo, an important producer of gold in Alaska with critical mineral enrichments

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Figure 1. Photographs of commercial, expanded vermiculite ore from the four major historical sources.
November 6, 2017

Photographs of commercial, expanded vermiculite ore.

Figure 1. Photographs of commercial, expanded vermiculite ore from the four major historical sources: Libby, Montana; Palabora, South Africa; Louisa, Virginia; and Enoree, South Carolina. Scale of the rightmost image in each set is the same as the left image unless otherwise labeled. Note (k) shows Libby vermiculite insulation with admixed cellulose whereas (l) shows

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monazite grains SEM photo
October 31, 2017

SEM Photo of Monazite Grains with REE

Monazite grains with rare earth elements lanthenum, cerium and neodinium are associated with zirconium, pyrite and potassium feldspar. Mineral identification performed by a combination of scanning of electron microscopy (SEM) and electron microprobe.

scientist walking through graben
October 2, 2016

Eureka Graben, Silverton caldera complex, CO

USGS scientist David Fey walking through the Eureka Graben in the Silverton caldera complex.

Red Mountain, Colorado
April 19, 2016

Red Mountain near Silverton, Colorado

Intensely altered propylitic rocks (red and yellow) in the Red Mountain mining district, overprinting the regional, propylitically altered igneous rocks (grayish-green), peaks at top of image. View to west.

eudialyte and bastnäsite samples
April 14, 2016

Eudialyte and Bastnäsite Samples

Sample of eudialyte (pink) within layered vein consisting of quartz, albite, and sodic amphibole, Dora Bay, Alaska. Size of sample is 11 by 9 cm. Sample of coarse-grained, tabular bastnäsite within matrix of ferruginous dolomite, Birthday Claim, Mountain Pass, California. Photographs by Philip Verplanck, U.S. Geological Survey. SIR 2010-5070-J

Image shows a scanning electron microscope image of finchite
December 31, 2015

Scanning Electron Microscope Image of Finchite

A scanning electron microscope image of the newly discovered mineral finchite. The Denver Microbeam Lab provided this scan of finchite in order to help describe and identify the mineral as a new one. Finchite is a uranium mineral first observed in Martin County, Texas. Read more about our uranium research here

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Image shows a sample of the mineral finchite with a chair wheel for scale
December 31, 2015

Finchite Mineral

A sample of finchite, a newly discovered uranium mineral. Finchite is the yellow material on the surface of the rock. Finchite is found in the late Pleistocene sediments deposited during the Illinoian glacial stage. It was first observed in Martin County, Texas. Read more about our uranium research here

Image shows a sample of finchite with a quarter for scale
December 31, 2015

Finchite Mineral

A sample of finchite, a newly discovered uranium mineral. Finchite is the yellow material on the surface of the rock. Finchite is found in the late Pleistocene sediments deposited during the Illinoian glacial stage. It was first observed in Martin County, Texas. Read more about our uranium research here