Harvey E. Belkin (Former Employee)
Science and Products
Filter Total Items: 76
Chapter 13 Petrogenesis of the Campanian Ignimbrite: Implications for crystal-melt separation and open-system processes from major and trace elements and Th isotopic data Chapter 13 Petrogenesis of the Campanian Ignimbrite: Implications for crystal-melt separation and open-system processes from major and trace elements and Th isotopic data
The Campanian Ignimbrite is a large-volume trachytic to phonolitic ignimbrite that was deposited at ≈39.3 ka and represents one of a number of highly explosive volcanic events that have occurred in the region near Naples, Italy. Thermodynamic modeling using the MELTS algorithm reveals that major element variations are dominated by crystal-liquid separation at 0.15 GPa. Initial dissolved...
Authors
W.A. Bohrson, F. J. Spera, S. J. Fowler, H. E. Belkin, B. de Vivo, G. Rolandi
A shock-induced polymorph of anatase and rutile from the Chesapeake Bay impact structure, Virginia, U.S.A A shock-induced polymorph of anatase and rutile from the Chesapeake Bay impact structure, Virginia, U.S.A
A shock-induced polymorph (TiO2II) of anatase and rutile has been identified in breccias from the late Eocene Chesapeake Bay impact structure. The breccia samples are from a recent, partially cored test hole in the central uplift at Cape Charles, Virginia. The drill cores from 744 to 823 m depth consist of suevitic crystalline-clast breccia and brecciated cataclastic gneiss in which the...
Authors
J.C. Jackson, J. Wright Horton, I.-M. Chou, H. E. Belkin
Ecology and shell chemistry of Loxoconcha matagordensis Ecology and shell chemistry of Loxoconcha matagordensis
Studies of the seasonal ecology and shell chemistry of the ostracode Loxoconcha matagordensis and related species of Loxoconcha from regions off eastern North America reveal that shell size and trace elemental (Mg/Ca ratio) composition are useful in paleothermometry using fossil populations. Seasonal sampling of populations from Chesapeake Bay, augmented by samples from Florida Bay...
Authors
T. M. Cronin, T. Kamiya, G. S. Dwyer, H. Belkin, C.D. Vann, S. Schwede, R. Wagner
Geothermometry, geochronology, and mass transfer associated with hydrothermal alteration of a rhyolitic hyaloclastite from Ponza Island, Italy Geothermometry, geochronology, and mass transfer associated with hydrothermal alteration of a rhyolitic hyaloclastite from Ponza Island, Italy
A rhyolitic hyaloclastite from Ponza Island, Italy, was hydrothermally altered, producing four distinct alteration zones based on X-ray diffraction mineralogy and field textures: (1) nonpervasive argillic zone; (2) propylitic zone; (3) silicic zone; and (4) sericitic zone. The unaltered hyaloclastite is volcanic breccia with clasts of vesiculated obsidian in a matrix of predominantly...
Authors
S. P. Altaner, R.F. Ylagan, S.M. Savin, J.L. Aronson, H. E. Belkin, A. Pozzuoli
Tectonic controls on the genesis of ignimbrites from the Campanian Volcanic Zone, southern Italy Tectonic controls on the genesis of ignimbrites from the Campanian Volcanic Zone, southern Italy
The Campanian Plain is an 80 x 30 km region of southern Italy, bordered by the Apennine Chain, that has experienced subsidence during the Quaternary. This region, volcanologically active in the last 600 ka, has been identified as the Campanian Volcanic Zone (CVZ). The products of three periods of trachytic ignimbrite volcanism (289-246 ka, 157 ka and 106 ka) have been identified in the...
Authors
G. Rolandi, F. Bellucci, M.T. Heizler, H. E. Belkin, B. de Vivo
Characterization of limestone reacted with acid-mine drainage in a pulsed limestone bed treatment system at the Friendship Hill National Historical Site, Pennsylvania, USA Characterization of limestone reacted with acid-mine drainage in a pulsed limestone bed treatment system at the Friendship Hill National Historical Site, Pennsylvania, USA
Armoring of limestone is a common cause of failure in limestone-based acid-mine drainage (AMD) treatment systems. Limestone is the least expensive material available for acid neutralization, but is not typically recommended for highly acidic, Fe-rich waters due to armoring with Fe(III) oxyhydroxide coatings. A new AMD treatment technology that uses CO2 in a pulsed limestone bed reactor...
Authors
Jane M. Hammarstrom, Philip Sibrell, Harvey E. Belkin
Health impacts of coal and coal use: Possible solutions Health impacts of coal and coal use: Possible solutions
Coal will be a dominant energy source in both developed and developing countries for at least the first half of the 21st century. Environmental problems associated with coal, before mining, during mining, in storage, during combustion, and postcombustion waste products are well known and are being addressed by ongoing research. The connection between potential environmental problems with...
Authors
R. B. Finkelman, W. Orem, V. Castranova, C. A. Tatu, H. E. Belkin, B. Zheng, H.E. Lerch, S.V. Maharaj, A. L. Bates
Compositional variation in minerals of the chevkinite group Compositional variation in minerals of the chevkinite group
The composition of chevkinite and perrierite, the most common members of the chevkinite group, is closely expressed by the formula A4BC2D2Si4O22, where A = (La,Ce,Ca,Sr,Th), B = Fe2+, C = (Fe2+,Fe3+,Ti,Al,Zr,Nb) and D = Ti. The A site is dominated by a strong negative correlation between (Ca+Sr) and the REE. Chondrite-normalized REE patterns are very variable, e.g. in LREE/HREE and Eu/Eu...
Authors
R. Macdonald, H. E. Belkin
Geological and geochemical characteristics of high arsenic coals from endemic arsenosis areas in southwestern Guizhou Province, China Geological and geochemical characteristics of high arsenic coals from endemic arsenosis areas in southwestern Guizhou Province, China
Southwest Guizhou Province is one of the most important areas of disseminated, sediment-hosted-type Au deposits in China and is an important area of coal production. The chemistry of most of the coals in SW Guizhou is similar to those in other parts of China. Their As content is near the Chinese coal average, but some local, small coal mines contain high As coals. The highest As content...
Authors
Z. Ding, B. Zheng, J. Long, H. E. Belkin, R. B. Finkelman, C. Chen, D. Zhou, Y. Zhou
Isotope geochemistry and fluid inclusion study of skarns from Vesuvius Isotope geochemistry and fluid inclusion study of skarns from Vesuvius
We present new mineral chemistry, fluid inclusion, stable carbon and oxygen, as well as Pb, Sr, and Nd isotope data of Ca-Mg-silicate-rich ejecta (skarns) and associated cognate and xenolithic nodules from the Mt. Somma-Vesuvius volcanic complex, Italy. The typically zoned skarn ejecta consist mainly of diopsidic and hedenbergitic, sometimes "fassaitic" clinopyroxene, Mg-rich and Ti-poor
Authors
H.A. Gilg, A. Lima, R. Somma, H. E. Belkin, B. de Vivo, R. A. Ayuso
New constraints on the pyroclastic eruptive history of the Campanian volcanic Plain (Italy) New constraints on the pyroclastic eruptive history of the Campanian volcanic Plain (Italy)
The ∼ 150 km3 (DRE) trachytic Campanian Ignimbrite, which is situated north-west of Naples, Italy, is one of the largest eruptions in the Mediterranean region in the last 200 ky. Despite centuries of investigation, the age and eruptive history of the Campanian Ignimbrite is still debated, as is the chronology of other significant volcanic events of the Campanian Plain within the last 200...
Authors
B. de Vivo, G. Rolandi, P. B. Gans, A. Calvert, W.A. Bohrson, F. J. Spera, H. E. Belkin
Understanding Vesuvius magmatic processes: Evidence from primitive silicate-melt inclusions in medieval scoria clinopyroxenes (Terzigno formation) Understanding Vesuvius magmatic processes: Evidence from primitive silicate-melt inclusions in medieval scoria clinopyroxenes (Terzigno formation)
Microthermometric investigations of silicate-melt inclusions and electron microprobe analyses were conducted on experimentally homogenized silicate-melt inclusions and on the host clinopyroxenes from 4 scoria samples of different layers from the Mt. Somma-Vesuvius medieval eruption (Formazione di Terzigno, 893 A.D.). The temperature of homogenization, considered the minimum trapping...
Authors
A. Lima, H. E. Belkin, K. Torok
Science and Products
Filter Total Items: 76
Chapter 13 Petrogenesis of the Campanian Ignimbrite: Implications for crystal-melt separation and open-system processes from major and trace elements and Th isotopic data Chapter 13 Petrogenesis of the Campanian Ignimbrite: Implications for crystal-melt separation and open-system processes from major and trace elements and Th isotopic data
The Campanian Ignimbrite is a large-volume trachytic to phonolitic ignimbrite that was deposited at ≈39.3 ka and represents one of a number of highly explosive volcanic events that have occurred in the region near Naples, Italy. Thermodynamic modeling using the MELTS algorithm reveals that major element variations are dominated by crystal-liquid separation at 0.15 GPa. Initial dissolved...
Authors
W.A. Bohrson, F. J. Spera, S. J. Fowler, H. E. Belkin, B. de Vivo, G. Rolandi
A shock-induced polymorph of anatase and rutile from the Chesapeake Bay impact structure, Virginia, U.S.A A shock-induced polymorph of anatase and rutile from the Chesapeake Bay impact structure, Virginia, U.S.A
A shock-induced polymorph (TiO2II) of anatase and rutile has been identified in breccias from the late Eocene Chesapeake Bay impact structure. The breccia samples are from a recent, partially cored test hole in the central uplift at Cape Charles, Virginia. The drill cores from 744 to 823 m depth consist of suevitic crystalline-clast breccia and brecciated cataclastic gneiss in which the...
Authors
J.C. Jackson, J. Wright Horton, I.-M. Chou, H. E. Belkin
Ecology and shell chemistry of Loxoconcha matagordensis Ecology and shell chemistry of Loxoconcha matagordensis
Studies of the seasonal ecology and shell chemistry of the ostracode Loxoconcha matagordensis and related species of Loxoconcha from regions off eastern North America reveal that shell size and trace elemental (Mg/Ca ratio) composition are useful in paleothermometry using fossil populations. Seasonal sampling of populations from Chesapeake Bay, augmented by samples from Florida Bay...
Authors
T. M. Cronin, T. Kamiya, G. S. Dwyer, H. Belkin, C.D. Vann, S. Schwede, R. Wagner
Geothermometry, geochronology, and mass transfer associated with hydrothermal alteration of a rhyolitic hyaloclastite from Ponza Island, Italy Geothermometry, geochronology, and mass transfer associated with hydrothermal alteration of a rhyolitic hyaloclastite from Ponza Island, Italy
A rhyolitic hyaloclastite from Ponza Island, Italy, was hydrothermally altered, producing four distinct alteration zones based on X-ray diffraction mineralogy and field textures: (1) nonpervasive argillic zone; (2) propylitic zone; (3) silicic zone; and (4) sericitic zone. The unaltered hyaloclastite is volcanic breccia with clasts of vesiculated obsidian in a matrix of predominantly...
Authors
S. P. Altaner, R.F. Ylagan, S.M. Savin, J.L. Aronson, H. E. Belkin, A. Pozzuoli
Tectonic controls on the genesis of ignimbrites from the Campanian Volcanic Zone, southern Italy Tectonic controls on the genesis of ignimbrites from the Campanian Volcanic Zone, southern Italy
The Campanian Plain is an 80 x 30 km region of southern Italy, bordered by the Apennine Chain, that has experienced subsidence during the Quaternary. This region, volcanologically active in the last 600 ka, has been identified as the Campanian Volcanic Zone (CVZ). The products of three periods of trachytic ignimbrite volcanism (289-246 ka, 157 ka and 106 ka) have been identified in the...
Authors
G. Rolandi, F. Bellucci, M.T. Heizler, H. E. Belkin, B. de Vivo
Characterization of limestone reacted with acid-mine drainage in a pulsed limestone bed treatment system at the Friendship Hill National Historical Site, Pennsylvania, USA Characterization of limestone reacted with acid-mine drainage in a pulsed limestone bed treatment system at the Friendship Hill National Historical Site, Pennsylvania, USA
Armoring of limestone is a common cause of failure in limestone-based acid-mine drainage (AMD) treatment systems. Limestone is the least expensive material available for acid neutralization, but is not typically recommended for highly acidic, Fe-rich waters due to armoring with Fe(III) oxyhydroxide coatings. A new AMD treatment technology that uses CO2 in a pulsed limestone bed reactor...
Authors
Jane M. Hammarstrom, Philip Sibrell, Harvey E. Belkin
Health impacts of coal and coal use: Possible solutions Health impacts of coal and coal use: Possible solutions
Coal will be a dominant energy source in both developed and developing countries for at least the first half of the 21st century. Environmental problems associated with coal, before mining, during mining, in storage, during combustion, and postcombustion waste products are well known and are being addressed by ongoing research. The connection between potential environmental problems with...
Authors
R. B. Finkelman, W. Orem, V. Castranova, C. A. Tatu, H. E. Belkin, B. Zheng, H.E. Lerch, S.V. Maharaj, A. L. Bates
Compositional variation in minerals of the chevkinite group Compositional variation in minerals of the chevkinite group
The composition of chevkinite and perrierite, the most common members of the chevkinite group, is closely expressed by the formula A4BC2D2Si4O22, where A = (La,Ce,Ca,Sr,Th), B = Fe2+, C = (Fe2+,Fe3+,Ti,Al,Zr,Nb) and D = Ti. The A site is dominated by a strong negative correlation between (Ca+Sr) and the REE. Chondrite-normalized REE patterns are very variable, e.g. in LREE/HREE and Eu/Eu...
Authors
R. Macdonald, H. E. Belkin
Geological and geochemical characteristics of high arsenic coals from endemic arsenosis areas in southwestern Guizhou Province, China Geological and geochemical characteristics of high arsenic coals from endemic arsenosis areas in southwestern Guizhou Province, China
Southwest Guizhou Province is one of the most important areas of disseminated, sediment-hosted-type Au deposits in China and is an important area of coal production. The chemistry of most of the coals in SW Guizhou is similar to those in other parts of China. Their As content is near the Chinese coal average, but some local, small coal mines contain high As coals. The highest As content...
Authors
Z. Ding, B. Zheng, J. Long, H. E. Belkin, R. B. Finkelman, C. Chen, D. Zhou, Y. Zhou
Isotope geochemistry and fluid inclusion study of skarns from Vesuvius Isotope geochemistry and fluid inclusion study of skarns from Vesuvius
We present new mineral chemistry, fluid inclusion, stable carbon and oxygen, as well as Pb, Sr, and Nd isotope data of Ca-Mg-silicate-rich ejecta (skarns) and associated cognate and xenolithic nodules from the Mt. Somma-Vesuvius volcanic complex, Italy. The typically zoned skarn ejecta consist mainly of diopsidic and hedenbergitic, sometimes "fassaitic" clinopyroxene, Mg-rich and Ti-poor
Authors
H.A. Gilg, A. Lima, R. Somma, H. E. Belkin, B. de Vivo, R. A. Ayuso
New constraints on the pyroclastic eruptive history of the Campanian volcanic Plain (Italy) New constraints on the pyroclastic eruptive history of the Campanian volcanic Plain (Italy)
The ∼ 150 km3 (DRE) trachytic Campanian Ignimbrite, which is situated north-west of Naples, Italy, is one of the largest eruptions in the Mediterranean region in the last 200 ky. Despite centuries of investigation, the age and eruptive history of the Campanian Ignimbrite is still debated, as is the chronology of other significant volcanic events of the Campanian Plain within the last 200...
Authors
B. de Vivo, G. Rolandi, P. B. Gans, A. Calvert, W.A. Bohrson, F. J. Spera, H. E. Belkin
Understanding Vesuvius magmatic processes: Evidence from primitive silicate-melt inclusions in medieval scoria clinopyroxenes (Terzigno formation) Understanding Vesuvius magmatic processes: Evidence from primitive silicate-melt inclusions in medieval scoria clinopyroxenes (Terzigno formation)
Microthermometric investigations of silicate-melt inclusions and electron microprobe analyses were conducted on experimentally homogenized silicate-melt inclusions and on the host clinopyroxenes from 4 scoria samples of different layers from the Mt. Somma-Vesuvius medieval eruption (Formazione di Terzigno, 893 A.D.). The temperature of homogenization, considered the minimum trapping...
Authors
A. Lima, H. E. Belkin, K. Torok