Energy and Minerals
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The dilemma of the Jiaodong gold deposits: Are they unique?
The ca. 126–120 Ma Au deposits of the Jiaodong Peninsula, eastern China, define the country's largest gold province with an overall endowment estimated as >3000 t Au. The vein and disseminated ores are hosted by NE- to NNE-trending brittle normal faults that parallel the margins of ca. 165–150 Ma, deeply emplaced, lower crustal melt granites...Goldfarb, Richard J.; Santosh, M.
Energy and Minerals Science at the U.S. Geological SurveyFerrero, Richard C.; Kolak, Jonathan J.; Bills, Donald J.; Bowen, Zachary H.; Cordier, Daniel J.; Gallegos, Tanya J.; Hein, James R.; Kelley, Karen D.; Nelson, Philip H.; Nuccio, Vito F.; Schmidt, Jeanine M.; Seal, Robert R., II
Tectonic map of the Circum-Pacific region, Pacific basin sheetScheibner, E.; Moore, G.W.; Drummond, K.J.; Dalziel, Corvalan Q.J.; Moritani, T.; Teraoka, Y.; Sato, T.; Craddock, C.
Predicting the toxicity of metal mixtures
The toxicity of single and multiple metal (Cd, Cu, Pb, and Zn) solutions to trout is predicted using an approach that combines calculations of: (1) solution speciation; (2) competition and accumulation of cations (H, Ca, Mg, Na, Cd, Cu, Pb, and Zn) on low abundance, high affinity and high abundance, low affinity biotic ligand sites; (3) a toxicity...Balistrieri, Laurie S.; Mebane, Christopher A.
A deposit model for magmatic iron-titanium-oxide deposits related to Proterozoic massif anorthosite plutonic suitesWoodruff, Laurel G.; Nicholson, Suzanne W.; Fey, David L.
Meeting the Science Needs of the Nation in the Wake of Hurricane Sandy-- A U.S. Geological Survey Science Plan for Support of Restoration and RecoveryBuxton, Herbert T.; Andersen, Matthew E.; Focazio, Michael J.; Haines, John W.; Hainly, Robert A.; Hippe, Daniel J.; Sugarbaker, Larry J.
Holocene faulting in the Bellingham forearc basin: upper-plate deformation at the northern end of the Cascadia subduction zone
The northern Cascadia forearc takes up most of the strain transmitted northward via the Oregon Coast block from the northward-migrating Sierra Nevada block. The north-south contractional strain in the forearc manifests in upper-plate faults active during the Holocene, the northern-most components of which are faults within the Bellingham Basin...Kelsey, Harvey M.; Sherrod, Brian L.; Blakely, Richard J.; Haugerud, Ralph A.
Development and application of a soil organic matter-based soil quality index in mineralized terrane of the Western US
Soil quality indices provide a means of distilling large amounts of data into a single metric that evaluates the soil’s ability to carry out key ecosystem functions. Primarily developed in agroecosytems, then forested ecosystems, an index using the relation between soil organic matter and other key soil properties in more semi-arid systems of the...Blecker, S.W.; Stillings, Lisa L.; Amacher, M.C.; Ippolito, J.A.; DeCrappeo, N.M.
A preliminary deposit model for lithium-cesium-tantalum (LCT) pegmatites
This report is part of an effort by the U.S. Geological Survey to update existing mineral deposit models and to develop new ones. We emphasize practical aspects of pegmatite geology that might directly or indirectly help in exploration for lithium-cesium-tantalum (LCT) pegmatites, or for assessing regions for pegmatite-related mineral resource...Bradley, Dwight; McCauley, Andrew
A preliminary deposit model for lithium brines
This report is part of an effort by the U.S. Geological Survey to update existing mineral deposit models and to develop new ones. The global transition away from hydrocarbons toward energy alternatives increases demand for many scarce metals. Among these is lithium, a key component of lithium-ion batteries for electric and hybrid vehicles. Lithium...Bradley, Dwight; Munk, LeeAnn; Jochens, Hillary; Hynek, Scott; Labay, Keith A.
Assessing time-integrated dissolved concentrations and predicting toxicity of metals during diel cycling in streams
Evaluating water quality and the health of aquatic organisms is challenging in systems with systematic diel (24 hour) or less predictable runoff-induced changes in water composition. To advance our understanding of how to evaluate environmental health in these dynamic systems, field studies of diel cycling were conducted in two streams (Silver Bow...Balistrieri, Laurie S.; Nimick, David A.; Mebane, Christopher A.
Appalachian coal and petroleum resources are still available in sufficient quantities to contribute significantly to fulfilling the nation’s energy needs, according to a recent study by the U.S. Geological Survey.
The Gas Hydrates Project at the U.S. Geological Survey (USGS) contributed to a four-year international effort by multiple partners, including the United Nations Environmental Programme (UNEP), to formulate a just-released report entitled, “Frozen Heat: A Global Outlook on Methane Gas Hydrates.”
More data and research are necessary to best understand the potential risks to water quality associated with unconventional oil and gas development in the United States, according to a recent U.S. Geological Survey study.
While the earth contains enough potash to meet the increased global demand for crop production and U.S. supplies are likely secure, some regions lack potash deposits needed for optimal food crop yields. According to a recent USGS global assessment of potash resources, the costs of importing potash long distances can limit its use and imports are subject to supply disruptions.
ANCHORAGE, Alaska. — New maps highlighting areas with potential for placer gold and five other critical mineral deposit types in the Bureau of Land Management’s Central Yukon Planning Area in central and northern Alaska are being released today.
The President’s fiscal year 2016 budget request for the U.S. Geological Survey is $1.2 billion, an increase of nearly $150 million above the FY 2015 enacted level.
The estimated value of mineral production increased in the United States in 2014, despite the decline in price for most precious metals, the U.S. Geological Survey announced today in its Mineral Commodity Summaries 2015.
Two new U.S. Geological Survey publications that highlight historical hydraulic fracturing trends and data from 1947 to 2010 are now available.
SPOKANE, Wash. — In cooperation with the Polish Geological Institute — National Research Institute, U.S. Geological Survey scientists have published a new assessment of copper resources in Poland and Germany. This investigation is part of the U.S. Geological Survey’s Global Mineral Resource Assessment.
Energy development in the Williston Basin oil production area of Montana and North Dakota, which includes the Bakken and Three Forks Formations, has not affected shallow groundwater quality, according to a recently published study in the journalGroundwater.
Citizens should not be alarmed if they see a low-flying helicopter towing a large wire-loop contraption hanging from a cable in the Poplar, Montana area during the next couple of weeks.
Last year, the estimated value of mineral production in the U.S. was $74.3 billion, a slight decrease from $75.8 billion in 2012. According to the U.S. Geological Survey’s annual Mineral Commodity Summaries 2014 report, the 2013 decrease follows three consecutive years of increases.