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Year Published: 2015

Factors controlling Li concentration and isotopic composition in formation waters and host rocks of Marcellus Shale, Appalachian Basin

In this study, water and whole rock samples from hydraulically fractured wells in the Marcellus Shale (Middle Devonian), and water from conventional wells producing from Upper Devonian sandstones were analyzed for lithium concentrations and isotope ratios (δ7Li). The distribution of lithium concentrations in different mineral groups was...

Phan, Thai T.; Capo, Rosemary C; Stewart, Brian W.; Macpherson, Gwen; Rowan, Elisabeth L.; Hammack, Richard W.

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Year Published: 2015

Porphyry copper assessment of the Tethys region of western and southern Asia: Chapter V in Global mineral resource assessment

A probabilistic mineral resource assessment of undiscovered resources in porphyry copper deposits in the Tethys region of western and southern Asia was carried out as part of a global mineral resource assessment led by the U.S. Geological Survey (USGS). The purpose of the study was to delineate geographic areas as permissive tracts for the...

Zientek, Michael L.; Hammarstrom, Jane M.; Johnson, Kathleen M.; Zürcher, Lukas; Bookstrom, Arthur A.; Hammarstrom, Jane M.; Mars, John C.; Ludington, Stephen; Zientek, Michael L.; Dunlap, Pamela; Wallis, John C.; Drew, Lawrence J.; Sutphin, David M.; Berger, Byron R.; Herrington, Richard J.; Billa, Mario; Kuşcu, Ilkay; Moon, Charles J.; Richards, Jeremy P.
Zürcher, L., Bookstrom A.A., Hammarstrom, J.M., Mars, J.C., Ludington, S., Zientek, M.L., Dunlap, P., and Wallis, J.C., with contributions from Drew, L.J., Sutphin, D.M., Berger, B.R., Herrington, R.J., Billa, M., Kuşcu, I., Moon, C.J. ,and Richards, J.P., 2015, Porphyry copper assessment of the Tethys region of western and southern Asia: U.S. Geological Survey Scientific Investigations Report 2010–5090–V, 232 p., and spatial data, http://dx.doi.org/10.3133/sir20105090V.

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Year Published: 2015

Extraction of hydrocarbons from high-maturity Marcellus Shale using supercritical carbon dioxide

Shale is now commonly exploited as a hydrocarbon resource. Due to the high degree of geochemical and petrophysical heterogeneity both between shale reservoirs and within a single reservoir, there is a growing need to find more efficient methods of extracting petroleum compounds (crude oil, natural gas, bitumen) from potential source rocks. In this...

Jarboe, Palma J.; Philip A. Candela; Wenlu Zhu; Alan J. Kaufman

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Year Published: 2015

Remote sensing to monitor cover crop adoption in southeastern Pennsylvania

In the Chesapeake Bay Watershed, winter cereal cover crops are often planted in rotation with summer crops to reduce the loss of nutrients and sediment from agricultural systems. Cover crops can also improve soil health, control weeds and pests, supplement forage needs, and support resilient cropping systems. In southeastern Pennsylvania, cover...

Hively, Wells; Sjoerd Duiker; Greg McCarty; Prabhakara, Kusuma
Hively, W.D., S.W. Duiker, G.W. McCarty, and K. Prabhakara, 2015, Remote sensing to monitor cover crop adoption in southeastern Pennsylvania: Journal of Soil and Water Conservation, v. 70, no. 6, p. 340-352, DOI:10.2489/jswc70.6.340.

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Year Published: 2015

U.S. Geological Survey Chesapeake science strategy, 2015-2025—Informing ecosystem management of America’s largest estuary

Executive Summary The U.S. Geological Survey (USGS) has the critical role of providing scientific information to improve the understanding and management of the Chesapeake Bay ecosystem. The USGS works with Federal, State, and academic science partners to provide research and monitoring, and communicate results of these activities to enhance...

Phillips, Scott; Blomquist, Joel D.; Phillips, Scott; Blomquist, Joel D.; Bennett, Mark; Berlin, Alicia; Blazer, Vicki; Claggett, Peter; Faulkner, Stephen; Hyer, Kenneth; Ladino, Cassandra; Moyer, Douglas; Muir, Rachel; Noe, Gregory B.; Phillips, Patrick J.
Phillips, Scott, and Blomquist, Joel, eds., 2015, U.S. Geological Survey Chesapeake science strategy, 2015–2025—Informing ecosystem management of America’s largest estuary: U.S. Geological Survey Open-File Report 2015–1162, 43 p., http://dx.doi.org/10.3133/ofr20151162.

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Year Published: 2015

Soil geochemical survey of abandoned mining sites in the Eastern-Central Peloritani Mountains, Sicily, Italy

This investigation focused on topsoils (n = 122) and vertical profiles (n = 6) distributed over an area of 250 km2 in the eastern-central Peloritani Mountains, northeastern Sicily. Georeferenced concentration of 53 elements (including potentially harmful ones), determined by ICP-MS after an aqua regia leach, were used to produce geochemical...

Consenza, A.; Lima, A.; Ayuso, Robert A.; Foley, Nora K.; Albanese, S.; Messina, A.; De Vivo, B.
Cosenza, A., Lima, A., Ayuso, R. A., Foley, N. K., Albanese, S., Messina, A., & De Vivo, B. (2015). Soil geochemical survey of abandoned mining sites in the Eastern-Central Peloritani Mountains, Sicily, Italy. Geochemistry: Exploration, Environment, Analysis, 15(4), 361–372.

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Year Published: 2015

Suburban watershed nitrogen retention: Estimating the effectiveness of stormwater management structures

Excess nitrogen (N) is a primary driver of freshwater and coastal eutrophication globally, and urban stormwater is a rapidly growing source of N pollution. Stormwater best management practices (BMPs) are used widely to remove excess N from runoff in urban and suburban areas, and are expected to perform under a wide variety of environmental...

Koch, Benjamin J.; Febria, Catherine M.; Cooke, Roger M.; Hosen, Jacob D.; Baker, Matthew E.; Colson, Abigail R.; Filoso, Solange; Hayhoe, Katharine; Loperfido, J. V.; Stoner, Anne M.K.; Palmer, Margaret A.
Koch, Benjamin J., Febria, Catherine M., Cooke, Roger M., Hosen, Jacob D., Baker, Matthew E., Colson, Abigail R., Filoso, Solange, Hayhoe, Katharine, Loperfido, J.V., Stoner, Anne, M.K., Palmer, Margaret A., 2015, Suburban watershed nitrogen retention-Estimating the effectiveness of stormwater management structures: Elementa Science of the Anthropocene, Special Feature-Urban Aquatic Ecosystems, DOI 10.12952/journal.elementa.000063.

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Year Published: 2015

Fluvial geomorphology and suspended-sediment transport during construction of the Roanoke River Flood Reduction Project in Roanoke, Virginia, 2005–2012

Beginning in 2005, after decades of planning, the U.S. Army Corps of Engineers (USACE) undertook a major construction effort to reduce the effects of flooding on the city of Roanoke, Virginia—the Roanoke River Flood Reduction Project (RRFRP). Prompted by concerns about the potential for RRFRP construction-induced geomorphological instability...

Jastram, John D.; Krstolic, Jennifer L.; Moyer, Douglas; Hyer, Kenneth
Jastram, J.D., Krstolic, J.L., Moyer, D.L., and Hyer, K.E., 2015, Fluvial geomorphology and suspended-sediment transport during construction of the Roanoke River Flood Reduction Project in Roanoke, Virginia, 2005–2012: U.S. Geological Survey Scientific Investigations Report 2015–5111, 53 p., http://dx.doi.org/10.3133/sir20155111.

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Year Published: 2015

Effects of Hydrocarbon Extraction on Landscapes of the Appalachian Basin

An important and sometimes overlooked aspect of contemporary natural gas exploration, development, and delivery activities is the geographic profile and spatial footprint that these activities have on the land surface. The function of many ecosystems and the goods and services they provide, in large part, are the result of their natural spatial...

Slonecker, Terry E.; Milheim, Lesley E.; Roig-Silva, Coral M.; Kalaly, Siddiq S.
Slonecker, E.T., Milheim, L.E., Roig-Silva, C.M., and Kalaly, S.S., 2015, Effects of hydrocarbon extraction on landscapes of the Appalachian basin: U.S. Geological Survey Fact Sheet 2015–3064, 2 p., http://dx.doi.org/10.3133/fs20153064.

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Year Published: 2015

Measurement of in situ sulfur isotopes by laser ablation multi-collector ICPMS: opening Pandora’s Box

Laser ablation multi-collector ICPMS is a modern tool for in situ measurement of S isotopes. Advantages of the technique are speed of analysis and relatively minor matrix effects combined with spatial resolution sufficient for many applications. The main disadvantage is a more destructive sampling mechanism relative to the ion microprobe...

Ridley, William I.; Pribil, Michael; Koenig, Alan E.; Slack, John F.

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Year Published: 2015

Summary of the Ahankashan Area of Interest

This report summarizes and interprets results of the work in the Ahankashan Area of Interest in northwestern Afghanistan and four study areas—the Ahankashan Prospect Area, Syahsang-Kushkak, Taghab-Soni, and Zakak-e ‘Olya—delineated for their potential undiscovered mineral occurrences with specific emphasis on porphyry copper and...

Drew, Lawrence J.; Sutphin, David M.; Mars, John C.; Bogdanow, Anya K.
Drew, L.J., Sutphin, D.M., Mars, J.C., and Bogdanow, A.K., 2015, Summary of the Ahankashan area of interest: U.S. Geological Survey Open-File Report 2015–1040, 26 p., http://dx.doi.org/10.3133/ofr20151040.

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Year Published: 2015

Hydrogeology and simulation of groundwater flow in fractured-rock aquifers of the Piedmont and Blue Ridge Physiographic Provinces, Bedford County, Virginia

An annual groundwater budget was computed as part of a hydrogeologic characterization and monitoring effort of fractured-rock aquifers in Bedford County, Virginia, a growing 764-square-mile (mi2) rural area between the cities of Roanoke and Lynchburg, Virginia. Data collection in Bedford County began in the 1930s when continuous stream gages were...

McCoy, Kurt J.; White, Bradley A.; Yager, Richard M.; Harlow, George E.
McCoy, K.J., White, B.A., Yager, R.M., and Harlow, G.E., Jr., 2015, Hydrogeology and simulation of groundwater flow in fractured-rock aquifers of the Piedmont and Blue Ridge Physiographic Provinces, Bedford County, Virginia: U.S. Geological Survey Scientific Investigations Report 2015–5113, 54 p., http://dx.doi.org/10.3133/sir20155113.