Skip to main content
U.S. flag

An official website of the United States government

Publications

Results from our Program’s research and minerals information activities are published in USGS publications series as well as in outside journals.  To follow Minerals Information Periodicals, subscribe to the Mineral Periodicals RSS feed.

Filter Total Items: 2558

Gemstones in 2013 Gemstones in 2013

No abstract available.
Authors
Donald W. Olson

Lithium in 2013 Lithium in 2013

No abstract available.
Authors
Brian W. Jaskula

Steady incision of Grand Canyon at the million year timeframe: A case for mantle-driven differential uplift Steady incision of Grand Canyon at the million year timeframe: A case for mantle-driven differential uplift

The Grand Canyon region provides an excellent laboratory to examine the interplay between river incision, magmatism, and the geomorphic and tectonic processes that shape landscapes. Here we apply U-series, Ar–Ar, and cosmogenic burial dating of river terraces to examine spatial variations in incision rates along the 445 km length of the Colorado River through Grand Canyon. We also...
Authors
Ryan S. Crow, Karl Karlstrom, Andrew Darling, Laura Crossey, Victor Polyak, Darryl E. Granger, Yemane Asmerom, Brandon Schmandt

Modified expression for bulb-tracer depletion—Effect on argon dating standards Modified expression for bulb-tracer depletion—Effect on argon dating standards

40Ar/39Ar geochronology depends critically on well-calibrated standards, often traceable to first-principles K-Ar age calibrations using bulb-tracer systems. Tracer systems also provide precise standards for noble-gas studies and interlaboratory calibration. The exponential expression long used for calculating isotope tracer concentrations in K-Ar age dating and calibration of 40Ar/39Ar...
Authors
Robert J. Fleck, Andrew T. Calvert

Compilation of gallium resource data for bauxite deposits Compilation of gallium resource data for bauxite deposits

Gallium (Ga) concentrations for bauxite deposits worldwide have been compiled from the literature to provide a basis for research regarding the occurrence and distribution of Ga worldwide, as well as between types of bauxite deposits. In addition, this report is an attempt to bring together reported Ga concentration data into one database to supplement ongoing U.S. Geological Survey...
Authors
Ruth F. Schulte, Nora K. Foley

Lithium: for harnessing renewable energy Lithium: for harnessing renewable energy

Lithium, which has the chemical symbol Li and an atomic number of 3, is the first metal in the periodic table. Lithium has many uses, the most prominent being in batteries for cell phones, laptops, and electric and hybrid vehicles. Worldwide sources of lithium are broken down by ore-deposit type as follows: closed-basin brines, 58%; pegmatites and related granites, 26%; lithium-enriched...
Authors
Dwight Bradley, Brian W. Jaskula

Mercury speciation in the Mt. Amiata mining district (Italy): interplay between urban activities and mercury contamination Mercury speciation in the Mt. Amiata mining district (Italy): interplay between urban activities and mercury contamination

A fundamental step to evaluate the biogeochemical and eco-toxicological significance of Hg dispersion in the environment is to determine speciation of Hg in solid matrices. In this study, several analytical techniques such as scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDS), sequential chemical extractions (SCEs), and X-ray absorption spectroscopy (XANES) were...
Authors
Valentina Rimondi, Fabrizio Bardelli, Marco Benvenuti, Pilario Costagliola, John E. Gray, Pierfranco Lattanzi
Was this page helpful?