Richard Wanty (Former Employee)
Science and Products
Filter Total Items: 114
Quantifying biomineralization of zinc in the Rio Naracauli (Sardinia, Italy), using a tracer injection and synoptic sampling
Streams draining mined areas throughout the world commonly have high concentrations of Zn. Because Zn is not easily removed from stream water and because it can be toxic to aquatic organisms, its presence is a persistent problem. The discovery of biomineralization of Zn-bearing solids in the mine drainage of Rio Naracauli, in Sardinia, Italy, provides insights into strategies for removing Zn and i
Authors
Giovanni De Giudici, Richard B. Wanty, F. Podda, Briant A. Kimball, Philip L. Verplanck, P. Lattanzi, R. Cidu, D. Medas
Cross-ecosystem impacts of stream pollution reduce resource and contaminant flux to riparian food webs
The effects of aquatic contaminants are propagated across ecosystem boundaries by aquatic insects that export resources and contaminants to terrestrial food webs; however, the mechanisms driving these effects are poorly understood. We examined how emergence, contaminant concentration, and total contaminant flux by adult aquatic insects changed over a gradient of bioavailable metals in streams and
Authors
Johanna M. Kraus, Travis S. Schmidt, David Walters, Richard B. Wanty, Robert E. Zuellig, Ruth E. Wolf
Formation of a low-crystalline Zn-silicate in a stream in SW Sardinia, Italy
n southwestern Sardinia, Italy, the Rio Naracauli drains a catchment that includes several abandoned mines. The drainage from the mines and associated waste rocks has led to extreme concentrations of dissolved Zn, but because of the near-neutral pH, concentrations of other metals remain low. In the reach from approximately 2300 to 3000 m downstream from the headwaters area, an amorphous Zn-silicat
Authors
Richard B. Wanty, G. De Giudici, P. Onnis, D. Rutherford, B. A. Kimball, F. Podda, R. Cidu, P. Lattanzi, D. Medas
Effect of ultramafic intrusions and associated mineralized rocks on the aqueous geochemistry of the Tangle Lakes Area, Alaska
Stream water was collected at 30 sites within the Tangle Lakes area of the Delta mineral belt in Alaska. Sampling focused on streams near the ultramafic rocks of the Fish Lake intrusive complex south of Eureka Creek and the Tangle Complex area east of Fourteen Mile Lake, as well as on those within the deformed metasedimentary, metavolcanic, and intrusive rocks of the Specimen Creek drainage and dr
Authors
Bronwen Wang, Larry P. Gough, Richard B. Wanty, Gregory K. Lee, James Vohden, J. Michael O’Neill, L. Jack Kerin
Pathways of coupled arsenic and iron cycling in high arsenic groundwater of the Hetao basin, Inner Mongolia, China: an iron isotope approach
High As groundwater is widely distributed all over the world, which has posed a significant health impact on millions of people. Iron isotopes have recently been used to characterize Fe cycling in aqueous environments, but there is no information on Fe isotope characteristics in the groundwater. Since groundwater As behavior is closely associated with Fe cycling in the aquifers, Fe isotope signatu
Authors
Huaming Guo, Chen Liu, Hai Lu, Richard B. Wanty, Jun Wang, Yinzhu Zhou
Emergence flux declines disproportionately to larval density along a stream metals gradient
Effects of contaminants on adult aquatic insect emergence are less well understood than effects on insect larvae. We compared responses of larval density and adult emergence along a metal contamination gradient. Nonlinear threshold responses were generally observed for larvae and emergers. Larval densities decreased significantly at low metal concentrations but precipitously at concentrations of m
Authors
Travis S. Schmidt, Johanna M. Kraus, David M. Walters, Richard B. Wanty
Zinc isotope and transition-element dynamics accompanying hydrozincite biomineralization in the Rio Naracauli, Sardinia, Italy
The Rio Naracauli in SW Sardinia drains part of the Ingurtosu Zn–Pb mining district, and contains extreme concentrations of dissolved Zn at near-neutral pH. In the upper reaches of the stream, pH, alkalinity and Zn concentrations are such that hydrozincite [Zn5(CO3)2(OH)6] precipitates in a biologically mediated process facilitated by a microalga (Chlorella sp.) and a cyanobacterium (Scytonema sp.
Authors
Richard B. Wanty, F. Podda, Giovanni De Giudici, R. Cidu, Pierfranco Lattanzi
Hydrozincite seasonal precipitation at Naracauli (Sardinia – Italy): Hydrochemical factors and morphological features of the biomineralization process
Hydrozincite [Zn5(CO3)2(OH)6] precipitation from Naracauli waters (SW Sardinia) is, among other things, promoted by a microbial community made up of a filamentous cyanobacterium (Scytonema sp.) and a microalgae (Chlorella sp.). Hydrozincite bioprecipitation is responsible for the natural removal of harmful metals, especially Zn, from the stream waters. Thus, hydrozincite could be used to attenuate
Authors
D. Medas, R. Cidu, P. Lattanzi, F. Podda, Richard B. Wanty, G. De Giudici
Geospatial database for regional environmental assessment of central Colorado.
In conjunction with the future planning needs of the U.S. Department of Agriculture, Forest Service, the U.S. Geological Survey conducted a detailed environmental assessment of the effects of historical mining on Forest Service lands in central Colorado. Stream sediment, macroinvertebrate, and various filtered and unfiltered water quality samples were collected during low-flow over a four-year per
Authors
Stan E. Church, Carma A. San Juan, David L. Fey, Travis S. Schmidt, Terry L. Klein, Ed H. DeWitt, Richard B. Wanty, Philip L. Verplanck, Katharine A. Mitchell, Monique G. Adams, LaDonna M. Choate, Todor I. Todorov, Barnaby W. Rockwell, Luke McEachron, Michael W. Anthony
Zinc isotope investigation of surface and pore waters in a mountain watershed impacted by acid rock drainage
The pollution of natural waters with metals derived from the oxidation of sulfide minerals like pyrite is a global environmental problem. However, the metal loading pathways and transport mechanisms associated with acid rock drainage reactions are often difficult to characterize using bulk chemical data alone. In this study, we evaluated the use of zinc (Zn) isotopes to complement traditional geoc
Authors
Suzan Aranda, David M. Borrok, Richard B. Wanty, Laurie S. Balistrieri
Geologic processes influence the effects of mining on aquatic ecosystems
Geologic processes strongly influence water and sediment quality in aquatic ecosystems but rarely are geologic principles incorporated into routine biomonitoring studies. We test if elevated concentrations of metals in water and sediment are restricted to streams downstream of mines or areas that may discharge mine wastes. We surveyed 198 catchments classified as “historically mined” or “unmined,”
Authors
Travis S. Schmidt, William H. Clements, Richard B. Wanty, Philip L. Verplanck, Stan E. Church, Carma A. San Juan, David L. Fey, Barnaby W. Rockwell, Ed H. DeWitt, Terry L. Klein
Biologically-mediated flux of trace metals from streams to riparian spiders: a large scale survey in mineralized alpine ecosystems
No abstract available.
Authors
J.M. Kraus, R. B. Wanty, T.S. Schmidt, D.M. Walters, C. A. Stricker
Non-USGS Publications**
Wanty, Richard B., 1986, Geochemistry of vanadium in an epigenetic sandstone-hosted vanadium-uranium deposit, Henry basin, Utah: Ph.D. Dissertation, Colorado School of Mines, 198 pp.
Wanty, Richard B., 1981, The use of radiogenic elements, and selected trace elements and their solution-mineral equilibria in groundwater as exploration tools for uranium deposits: M.S. Thesis, Colorado School of Mines, 151 pp.
Wanty, R.B., Langmuir, D., and Chatham, J.R., 1981, Groundwater prospecting for sandstone-type uranium deposits: The merits of mineral-solution equilibria versus single element tracer methods: U.S. Department of Energy, Grand Junction Office Report GJO-79-360-E, v. 2, 91 pp.
Chatham, J.R., Wanty, R.B., and Langmuir, D., 1981, National Uranium Resource Evaluation. Groundwater prospecting for sandstone-type uranium deposits: the merits of mineral-solution equilibria versus single element tracer methods. Final Report: U.S. Department of Energy, Grand Junction Office Report GJO-79-360-E, 197 pp.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
Science and Products
Filter Total Items: 114
Quantifying biomineralization of zinc in the Rio Naracauli (Sardinia, Italy), using a tracer injection and synoptic sampling
Streams draining mined areas throughout the world commonly have high concentrations of Zn. Because Zn is not easily removed from stream water and because it can be toxic to aquatic organisms, its presence is a persistent problem. The discovery of biomineralization of Zn-bearing solids in the mine drainage of Rio Naracauli, in Sardinia, Italy, provides insights into strategies for removing Zn and i
Authors
Giovanni De Giudici, Richard B. Wanty, F. Podda, Briant A. Kimball, Philip L. Verplanck, P. Lattanzi, R. Cidu, D. Medas
Cross-ecosystem impacts of stream pollution reduce resource and contaminant flux to riparian food webs
The effects of aquatic contaminants are propagated across ecosystem boundaries by aquatic insects that export resources and contaminants to terrestrial food webs; however, the mechanisms driving these effects are poorly understood. We examined how emergence, contaminant concentration, and total contaminant flux by adult aquatic insects changed over a gradient of bioavailable metals in streams and
Authors
Johanna M. Kraus, Travis S. Schmidt, David Walters, Richard B. Wanty, Robert E. Zuellig, Ruth E. Wolf
Formation of a low-crystalline Zn-silicate in a stream in SW Sardinia, Italy
n southwestern Sardinia, Italy, the Rio Naracauli drains a catchment that includes several abandoned mines. The drainage from the mines and associated waste rocks has led to extreme concentrations of dissolved Zn, but because of the near-neutral pH, concentrations of other metals remain low. In the reach from approximately 2300 to 3000 m downstream from the headwaters area, an amorphous Zn-silicat
Authors
Richard B. Wanty, G. De Giudici, P. Onnis, D. Rutherford, B. A. Kimball, F. Podda, R. Cidu, P. Lattanzi, D. Medas
Effect of ultramafic intrusions and associated mineralized rocks on the aqueous geochemistry of the Tangle Lakes Area, Alaska
Stream water was collected at 30 sites within the Tangle Lakes area of the Delta mineral belt in Alaska. Sampling focused on streams near the ultramafic rocks of the Fish Lake intrusive complex south of Eureka Creek and the Tangle Complex area east of Fourteen Mile Lake, as well as on those within the deformed metasedimentary, metavolcanic, and intrusive rocks of the Specimen Creek drainage and dr
Authors
Bronwen Wang, Larry P. Gough, Richard B. Wanty, Gregory K. Lee, James Vohden, J. Michael O’Neill, L. Jack Kerin
Pathways of coupled arsenic and iron cycling in high arsenic groundwater of the Hetao basin, Inner Mongolia, China: an iron isotope approach
High As groundwater is widely distributed all over the world, which has posed a significant health impact on millions of people. Iron isotopes have recently been used to characterize Fe cycling in aqueous environments, but there is no information on Fe isotope characteristics in the groundwater. Since groundwater As behavior is closely associated with Fe cycling in the aquifers, Fe isotope signatu
Authors
Huaming Guo, Chen Liu, Hai Lu, Richard B. Wanty, Jun Wang, Yinzhu Zhou
Emergence flux declines disproportionately to larval density along a stream metals gradient
Effects of contaminants on adult aquatic insect emergence are less well understood than effects on insect larvae. We compared responses of larval density and adult emergence along a metal contamination gradient. Nonlinear threshold responses were generally observed for larvae and emergers. Larval densities decreased significantly at low metal concentrations but precipitously at concentrations of m
Authors
Travis S. Schmidt, Johanna M. Kraus, David M. Walters, Richard B. Wanty
Zinc isotope and transition-element dynamics accompanying hydrozincite biomineralization in the Rio Naracauli, Sardinia, Italy
The Rio Naracauli in SW Sardinia drains part of the Ingurtosu Zn–Pb mining district, and contains extreme concentrations of dissolved Zn at near-neutral pH. In the upper reaches of the stream, pH, alkalinity and Zn concentrations are such that hydrozincite [Zn5(CO3)2(OH)6] precipitates in a biologically mediated process facilitated by a microalga (Chlorella sp.) and a cyanobacterium (Scytonema sp.
Authors
Richard B. Wanty, F. Podda, Giovanni De Giudici, R. Cidu, Pierfranco Lattanzi
Hydrozincite seasonal precipitation at Naracauli (Sardinia – Italy): Hydrochemical factors and morphological features of the biomineralization process
Hydrozincite [Zn5(CO3)2(OH)6] precipitation from Naracauli waters (SW Sardinia) is, among other things, promoted by a microbial community made up of a filamentous cyanobacterium (Scytonema sp.) and a microalgae (Chlorella sp.). Hydrozincite bioprecipitation is responsible for the natural removal of harmful metals, especially Zn, from the stream waters. Thus, hydrozincite could be used to attenuate
Authors
D. Medas, R. Cidu, P. Lattanzi, F. Podda, Richard B. Wanty, G. De Giudici
Geospatial database for regional environmental assessment of central Colorado.
In conjunction with the future planning needs of the U.S. Department of Agriculture, Forest Service, the U.S. Geological Survey conducted a detailed environmental assessment of the effects of historical mining on Forest Service lands in central Colorado. Stream sediment, macroinvertebrate, and various filtered and unfiltered water quality samples were collected during low-flow over a four-year per
Authors
Stan E. Church, Carma A. San Juan, David L. Fey, Travis S. Schmidt, Terry L. Klein, Ed H. DeWitt, Richard B. Wanty, Philip L. Verplanck, Katharine A. Mitchell, Monique G. Adams, LaDonna M. Choate, Todor I. Todorov, Barnaby W. Rockwell, Luke McEachron, Michael W. Anthony
Zinc isotope investigation of surface and pore waters in a mountain watershed impacted by acid rock drainage
The pollution of natural waters with metals derived from the oxidation of sulfide minerals like pyrite is a global environmental problem. However, the metal loading pathways and transport mechanisms associated with acid rock drainage reactions are often difficult to characterize using bulk chemical data alone. In this study, we evaluated the use of zinc (Zn) isotopes to complement traditional geoc
Authors
Suzan Aranda, David M. Borrok, Richard B. Wanty, Laurie S. Balistrieri
Geologic processes influence the effects of mining on aquatic ecosystems
Geologic processes strongly influence water and sediment quality in aquatic ecosystems but rarely are geologic principles incorporated into routine biomonitoring studies. We test if elevated concentrations of metals in water and sediment are restricted to streams downstream of mines or areas that may discharge mine wastes. We surveyed 198 catchments classified as “historically mined” or “unmined,”
Authors
Travis S. Schmidt, William H. Clements, Richard B. Wanty, Philip L. Verplanck, Stan E. Church, Carma A. San Juan, David L. Fey, Barnaby W. Rockwell, Ed H. DeWitt, Terry L. Klein
Biologically-mediated flux of trace metals from streams to riparian spiders: a large scale survey in mineralized alpine ecosystems
No abstract available.
Authors
J.M. Kraus, R. B. Wanty, T.S. Schmidt, D.M. Walters, C. A. Stricker
Non-USGS Publications**
Wanty, Richard B., 1986, Geochemistry of vanadium in an epigenetic sandstone-hosted vanadium-uranium deposit, Henry basin, Utah: Ph.D. Dissertation, Colorado School of Mines, 198 pp.
Wanty, Richard B., 1981, The use of radiogenic elements, and selected trace elements and their solution-mineral equilibria in groundwater as exploration tools for uranium deposits: M.S. Thesis, Colorado School of Mines, 151 pp.
Wanty, R.B., Langmuir, D., and Chatham, J.R., 1981, Groundwater prospecting for sandstone-type uranium deposits: The merits of mineral-solution equilibria versus single element tracer methods: U.S. Department of Energy, Grand Junction Office Report GJO-79-360-E, v. 2, 91 pp.
Chatham, J.R., Wanty, R.B., and Langmuir, D., 1981, National Uranium Resource Evaluation. Groundwater prospecting for sandstone-type uranium deposits: the merits of mineral-solution equilibria versus single element tracer methods. Final Report: U.S. Department of Energy, Grand Junction Office Report GJO-79-360-E, 197 pp.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
*Disclaimer: Listing outside positions with professional scientific organizations on this Staff Profile are for informational purposes only and do not constitute an endorsement of those professional scientific organizations or their activities by the USGS, Department of the Interior, or U.S. Government