Search Results - "Koski, Randolph A"

Metal Dispersion Resulting from Mining Activities in Coastal Environments: A Pathways Approach by KOSKI, RANDOLPH A.

“…Acid rock drainage (ARD) and disposal of tailings that result from mining activities impact coastal areas in many countries. The dispersion of metals from mine…”
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Deposition of talc — kerolite–smectite — smectite at seafloor hydrothermal vent fields: Evidence from mineralogical, geochemical and oxygen isotope studies by Dekov, Vesselin M., Cuadros, Javier, Shanks, Wayne C., Koski, Randolph A.

“…Talc, kerolite–smectite, smectite, chlorite–smectite and chlorite samples from sediments, chimneys and massive sulfides from six seafloor hydrothermal areas…”
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Layered hydrothermal barite-sulfide mound field, East Diamante Caldera, Mariana volcanic arc by Hein, James R, de Ronde, Cornel E. J, Koski, Randolph A, Ditchburn, Robert G, Mizell, Kira, Tamura, Yoshihiko, Stern, Robert J, Conrad, Tracey A, Ishizuka, Osamu, Leybourne, Matthew I

“…East Diamante is a submarine volcano in the southern Mariana arc that is host to a complex caldera approximately 5×10 km (elongated ENE-WSW) that is breached…”
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Sulfide oxidation and distribution of metals near abandoned copper mines in coastal environments, Prince William Sound, Alaska, USA by Koski, Randolph A., Munk, LeeAnn, Foster, Andrea L., Shanks, Wayne C., Stillings, Lisa L.

“…The oxidation of sulfide-rich rocks, mostly leftover debris from Cu mining in the early 20th century, is contributing to metal contamination of local coastal…”
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Gold enrichment and the Bi-Au association in pyrrhotite-rich massive sulfide deposits, Escanaba Trough, southern Gorda Ridge by Tormanen, Tuomo O, Koski, Randolph A

“…High gold contents (to 10.1 ppm, avg 1.4 ppm, n = 34) occur in pyrrhotite-rich massive sulphide samples from the sediment-covered floor of the Escanaba trough,…”
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Temporal variation and the effect of rainfall on metals flux from the historic Beatson mine, Prince William Sound, Alaska, USA by Stillings, Lisa L., Foster, Andrea L., Koski, Randolph A., Munk, LeeAnn, Shanks, Wayne C.

“…Several abandoned Cu mines are located along the shore of Prince William Sound, AK, where the effect of mining-related discharge upon shoreline ecosystems is…”
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Fossils of Hydrothermal Vent Worms from Cretaceous Sulfide Ores of the Samail Ophiolite, Oman by Haymon, Rachel M., Koski, Randolph A., Sinclair, Colin

“…Fossil worm tubes of Cretaceous age preserved in the Bayda massive sulfide deposit of the Samail ophiolite, Oman, are apparently the first documented examples…”
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Metalliferous Sediment and a Silica-Hematite Deposit within the Blanco Fracture Zone, Northeast Pacific by Hein, James R., Clague, David A., Koski, Randolph A., Embley, Robert W., Dunham, Rachel E.

“…A Tiburon ROV dive within the East Blanco Depression (EBD) increased the mapped extent of a known hydrothermal field by an order of magnitude. In addition, a…”
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Genesis of massive sulfide deposits on a sediment-covered spreading center, Escanaba Trough, southern Gorda Ridge by Zierenberg, Robert A, Koski, Randolph A, Morton, Janet L, Bouse, Robin M

“…The sediment-filled axial valley is spreading at the rate of 2.3 cm/yr. Pyrrhotite dominates, with minor isocubanite, chalcopyrite, sphalerite, arsenopyrite…”
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The making of metal deposits by Koski, Randolph A

“…The initial results of drilling into an actively forming massive sulphide deposit on the Mid-Atlantic Ridge and through into the underlying bedrock are…”
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Recent tectonics of the Blanco Ridge, eastern blanco transform fault zone by Dziak, Robert P, Fox, Christopher G, Embley, Robert W, Nabelek, John L, Braunmiller, Jochen, Koski, Randolph A

“…Bathymetric, hydro-acoustic, seismic, submersible, and gravity data are used to investigate the active tectonics of the eastern Blanco Transform Fault Zone…”
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Sulfide oxidation and distribution of metals near abandoned copper mines in coastal environments, Prince William Sound, Alaska, USA: Sulfide Oxidation: Insights from Experimental, Theoretical, Stable Isotope, and Predictive Studies in the Field and Laboratory by KOSKI, Randolph A, MUNK, Leeann, FOSTER, Andrea L, SHANKS, Wayne C, STILLINGS, Lisa L

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Temporal variation and the effect of rainfall on metals flux from the historic Beatson mine, Prince William Sound, Alaska, USA: Sulfide Oxidation: Insights from Experimental, Theoretical, Stable Isotope, and Predictive Studies in the Field and Laboratory by STILLINGS, Lisa L, FOSTER, Andrea L, KOSKI, Randolph A, MUNK, Leeann, SHANKS, Wayne C

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Geochemical evolution of solutions derived from experimental weathering of sulfide-bearing rocks by Munk, LeeAnn, Faure, Gunter, Koski, Randolph

“…The chemical composition of natural waters is affected by the weathering of geologic materials at or near the surface of the Earth. Laboratory weathering…”
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Relationships between microbial communities and environmental parameters at sites impacted by mining of volcanogenic massive sulfide deposits, Prince William Sound, Alaska by Foster, A.L., Munk, L., Koski, R.A., Shanks, W.C., Stillings, L.L.

“…The relations among geochemical parameters and sediment microbial communities were examined at three shoreline sites in the Prince William Sound, Alaska, which…”
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K-Ar Age Relations of Granodiorite Emplacement and Tungsten and Gold Mineralization near the Getchell Mine, Humboldt County, Nevada by Silberman, Miles L, Berger, Byron R, Koski, Randolph A

“…Magmatic-thermal episode 90 m.y. ago…”
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