Verplanck, Philip L.

About the author

U.S. Geological Survey, Central Region, Rocky Mountain area, Geology discipline
Abandoned mines and quarries, Aluminum, Antimony, Arsenic, Atomic emission spectroscopy, Barium, Beryllium, Bismuth, Boron, Business and economics, Cadmium, Calcium, Carbon, Cerium, Cesium, Chemical analysis, Chlorine, Chromatography, Chromium, Cobalt, Copper, Core analysis, Datasets, Dissolved metals, Dysprosium, Ecology, Economic geology, Erbium, Europium, Fluorine, Gadolinium, Gallium, Geochemistry, Geology, Geospatial datasets, Groundwater flow, Holmium, Iodine, Iron, Lanthanide series elements, Lanthanum, Lead, Light stable isotope analysis, Lithium, Lutetium, Macroinvertebrates, Magnesium, Manganese, Mass spectroscopy, Mathematical modeling, Metallic mineral resources, Mine drainage, Mine waste, Mineral deposits, Mineral resources, Mineralogy, Mining hazards, Molybdenum, Natural resource exploration, Neodymium, Neutron activation analysis, Nickel, Niobium, Nitrogen, Phosphorus, Potassium, Praseodymium, Promethium, Rare earth elements, Resource supply and demand, Rocks and deposits, Rubidium, Salinity, Samarium, Scandium, Selenium, Silicon, Silver, Sodium, Strontium, Sulfur, Surface water quality, Tantalum, Tellurium, Terbium, Thallium, Thorium, Thulium, Tin, Titanium, Tungsten, Uranium, Vanadium, Water chemistry, Water pH, Water sampling, X-ray fluorescence, Xenon, Ytterbium, Yttrium, Zinc, Zirconium, Mine sites, Mineral deposit areas, Microsoft Excel format, Portable Document Format, Comma-delimited text, File geodatabase (Esri), Shapefile, Rare earths

A deposit model for carbonatite and peralkaline intrusion-related rare earth element deposits

Carbonatite and alkaline intrusive complexes, as well as their weathering products, are the primary sources of rare earth elements. A wide variety of other commodities have been exploited from carbonatites and alkaline igneous rocks including

Hydrogeochemical investigation of the Standard Mine vicinity, upper Elk Creek basin, Colorado

Ground- and surface-water samples were collected in order to characterize the local ground-water flow system, determine metal concentrations in local ground water, and understand factors controlling the discharge of metal-rich waters from the mine.

Chemistry of Selected Core Samples, Concentrate, Tailings, and Tailings Pond Waters: Pea Ridge Iron (-Lanthanide-Gold) Deposit, Washington County, Missouri

This report examines potential sources of lanthanide elements [rare earth elements (REE)] with the objective of providing up-to-date geologic information regarding mineral commodities likely to have increased demand in the near term.

Spring runoff water-chemistry data from the Standard Mine and Elk Creek, Gunnison County, Colorado, 2010

Periodic sampling of water during the spring of 2010 was carried out to understand the range and timing of variation in pH and metal concentration, and help evaluate variation in water quality during spring runoff.

The rare-earth elements: vital to modern technologies and lifestyles

Explains how and where rare-earth resources form and concentrate and how they are used and interact with the environment to affect human and ecosystem health. Discusses supply and demand trends and where undiscovered sources of rare-earths might be found.

Rare-Earth Elements

Because of their unusual physical and chemical properties, the REEs have diverse defense, energy, industrial, and military technology applications including glass, petroleum refining, automobiles, and magnets.

Rare earth element mineral deposits in the United States

Summarizes importance of rare earth elements, characteristics of REE deposits, REE-bearing minerals, and the types of mineral deposits that contain these elements.

Deposit model for heavy-mineral sands in coastal environments

Sedimentary deposits of dense minerals that accumulate with sand, silt, and clay in coastal environments, locally forming economic concentrations of the heavy minerĀ­als.

Geospatial database for regional environmental assessment of central Colorado

Study focusing on the effects of historical mining on Forest Service lands in this area.