Harvey E. Belkin
Harvey Belkin is a Research Geologist (Scientist Emeritus) with the USGS Geology, Energy & Minerals (GEM) Science Center in Reston, VA.
Science and Products
Filter Total Items: 75
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 temperature, r
Authors
A. Lima, H. E. Belkin, K. Torok
Petrogenesis of late-stage granites and Y-REE-Zr-Nb-enriched vein dikes of the Bokan Mountain stock, Prince of Wales Island, southeastern Alaska
No abstract available.
Authors
J.A. Philpotts, C. D. Taylor, Mitsumoto Tatsumoto, H. E. Belkin
Pre-eruptive volatile content, melt-inclusion chemistry, and microthermometry of interplinian Vesuvius lavas (pre-AD 1631)
Silicate-melt inclusions from lavas and pyroclastics from a selected suite of pre-A.D. 1631 interplinian Mt. Somma-Vesuvius lavas and scoria have been experimentally homogeneized and studied by microthermometry, electron microprobe (EMPA) and secondary-ion mass spectrometry (SIMS) to examine pre-eruptive volatile content and magma evolution. The melt inclusions have a bubble about 0.06% their volu
Authors
H. E. Belkin, B. de Vivo, K. Torok, J.D. Webster
Magmagenesis at Soufriere volcano St Vincent, Lesser Antilles Arc
Soufriere volcano of St Vincent (<0.6 Ma) is composed of basalts and basaltic andesites, the most mafic of which (mg-number 75) may be representative of the parental magmas of the calc-alkaline suites of the Lesser Antilles arc. Parental, possibly primary, magmas at Soufriere had MgO ∼12.5 wt % and were probably nepheline-normative. They last equilibrated with mantle at ∼17 kbar pressure, at tempe
Authors
E. Heath, R. Macdonald, H. Belkin, C. Hawkesworth, Haraldur Sigurdsson
Modes of occurrence of trace elements in samples from a coal cleaning plant
No abstract available.
Authors
Curtis A. Palmer, Allan Kolker, Robert B. Finkelman, K.C. Kolb, Stanley J. Mroczkowski, S.S. Crowley, H. E. Belkin, J. H. Bullock, J.M. Motooka
Magmatic (silicates/saline/sulfur-rich/CO2) immiscibility and zirconium and rare-earth element enrichment from alkaline magma chamber margins : Evidence from Ponza Island, Pontine Archipelago, Italy
Fluid inclusions were measured from a feldspathoid-bearing syenite xenolith entrained in trachyte from Ponza, one of the islands of the Pontine Archipelago, located in the Gulf of Gaeta, Italy. The feldspathoid-bearing syenite consists mainly of potassium feldspar, clinopyroxene, amphibole, biotite, titanite, manganoan magnetite, apatite with minor nosean, Na-rich feldspar, pyrrhotite, and rare ch
Authors
H. E. Belkin, B. de Vivo, A. Lima, K. Torok
The Pennsylvanian Fire Clay tonstein of the Appalachian basin—Its distribution, biostratigraphy, and mineralogy: Discussion and reply
No abstract available.
Authors
William Outerbridge, C. L. Rice, Harvey E. Belkin, T.W. Henry, Michael J. Kunk
Evolution of tholeiitic diabase sheet systems in the eastern United States: examples from the Culpeper Basin, Virginia-Maryland, and the Gettysburg Basin, Pennsylvania
High-TiO2, quartz-normative (HTQ) tholeiite sheets of Early Jurassic age have intruded mainly Late Triassic sedimentary rocks in several early Mesozoic basins in the eastern US. Field observations, petrographic study, geochemical analyses and stable isotope data from three HTQ sheet systems were used to develop a general model of magmatic differentiation and magmatic-hydrothermal interaction for H
Authors
Laurel G. Woodruff, A. J. Froelich, Harvey E. Belkin, D. Gottfried
Memorial of Charles Milton; April 25, 1896-October 4, 1990
No abstract available
Authors
Harvey E. Belkin, Edward J. Dwornik
The Pennsylvanian Fire Clay tonstein of the Appalachian basin—Its distribution, biostratigraphy, and mineralogy
The Middle Pennsylvanian Fire Clay tonstein, mostly kaolinite and minor accessory minerals, is an altered and lithified volcanic ash preserved as a thin, isochronous layer associated with the Fire Clay coal bed. Seven samples of the tonstein, taken along a 300-km traverse of the central Appalachian basin, contain cogenetic phenocrysts and trapped silicate-melt inclusions of a rhyolitic magma. The
Authors
C. L. Rice, Harvey E. Belkin, T.W. Henry, R. E. Zartman, Michael J. Kunk
Geochemistry and argon thermochronology of the Variscan Sila Batholith, southern Italy: source rocks and magma evolution
The Sila batholith is the largest granitic massif in the Calabria-Peloritan Arc of southern Italy, consisting of syn to post-tectonic, calc-alkaline and metaluminous tonalite to granodiorite, and post-tectonic, peraluminous and strongly peraluminous, two-mica??cordierite??Al silicate granodiorite to leucomonzogranite. Mineral 40Ar/39Ar thermochronologic analyses document Variscan emplacement and c
Authors
R. A. Ayuso, A. Messina, B. de Vivo, S. Russo, L. G. Woodruff, J. F. Sutter, H. E. Belkin
Geochemical data for Jurassic basalts in the Early Mesozoic Newark Basin, New Jersey: The data of G.T. Faust
No abstract available.
Authors
H. E. Belkin, D. F. Fiorito
Science and Products
Filter Total Items: 75
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 temperature, r
Authors
A. Lima, H. E. Belkin, K. Torok
Petrogenesis of late-stage granites and Y-REE-Zr-Nb-enriched vein dikes of the Bokan Mountain stock, Prince of Wales Island, southeastern Alaska
No abstract available.
Authors
J.A. Philpotts, C. D. Taylor, Mitsumoto Tatsumoto, H. E. Belkin
Pre-eruptive volatile content, melt-inclusion chemistry, and microthermometry of interplinian Vesuvius lavas (pre-AD 1631)
Silicate-melt inclusions from lavas and pyroclastics from a selected suite of pre-A.D. 1631 interplinian Mt. Somma-Vesuvius lavas and scoria have been experimentally homogeneized and studied by microthermometry, electron microprobe (EMPA) and secondary-ion mass spectrometry (SIMS) to examine pre-eruptive volatile content and magma evolution. The melt inclusions have a bubble about 0.06% their volu
Authors
H. E. Belkin, B. de Vivo, K. Torok, J.D. Webster
Magmagenesis at Soufriere volcano St Vincent, Lesser Antilles Arc
Soufriere volcano of St Vincent (<0.6 Ma) is composed of basalts and basaltic andesites, the most mafic of which (mg-number 75) may be representative of the parental magmas of the calc-alkaline suites of the Lesser Antilles arc. Parental, possibly primary, magmas at Soufriere had MgO ∼12.5 wt % and were probably nepheline-normative. They last equilibrated with mantle at ∼17 kbar pressure, at tempe
Authors
E. Heath, R. Macdonald, H. Belkin, C. Hawkesworth, Haraldur Sigurdsson
Modes of occurrence of trace elements in samples from a coal cleaning plant
No abstract available.
Authors
Curtis A. Palmer, Allan Kolker, Robert B. Finkelman, K.C. Kolb, Stanley J. Mroczkowski, S.S. Crowley, H. E. Belkin, J. H. Bullock, J.M. Motooka
Magmatic (silicates/saline/sulfur-rich/CO2) immiscibility and zirconium and rare-earth element enrichment from alkaline magma chamber margins : Evidence from Ponza Island, Pontine Archipelago, Italy
Fluid inclusions were measured from a feldspathoid-bearing syenite xenolith entrained in trachyte from Ponza, one of the islands of the Pontine Archipelago, located in the Gulf of Gaeta, Italy. The feldspathoid-bearing syenite consists mainly of potassium feldspar, clinopyroxene, amphibole, biotite, titanite, manganoan magnetite, apatite with minor nosean, Na-rich feldspar, pyrrhotite, and rare ch
Authors
H. E. Belkin, B. de Vivo, A. Lima, K. Torok
The Pennsylvanian Fire Clay tonstein of the Appalachian basin—Its distribution, biostratigraphy, and mineralogy: Discussion and reply
No abstract available.
Authors
William Outerbridge, C. L. Rice, Harvey E. Belkin, T.W. Henry, Michael J. Kunk
Evolution of tholeiitic diabase sheet systems in the eastern United States: examples from the Culpeper Basin, Virginia-Maryland, and the Gettysburg Basin, Pennsylvania
High-TiO2, quartz-normative (HTQ) tholeiite sheets of Early Jurassic age have intruded mainly Late Triassic sedimentary rocks in several early Mesozoic basins in the eastern US. Field observations, petrographic study, geochemical analyses and stable isotope data from three HTQ sheet systems were used to develop a general model of magmatic differentiation and magmatic-hydrothermal interaction for H
Authors
Laurel G. Woodruff, A. J. Froelich, Harvey E. Belkin, D. Gottfried
Memorial of Charles Milton; April 25, 1896-October 4, 1990
No abstract available
Authors
Harvey E. Belkin, Edward J. Dwornik
The Pennsylvanian Fire Clay tonstein of the Appalachian basin—Its distribution, biostratigraphy, and mineralogy
The Middle Pennsylvanian Fire Clay tonstein, mostly kaolinite and minor accessory minerals, is an altered and lithified volcanic ash preserved as a thin, isochronous layer associated with the Fire Clay coal bed. Seven samples of the tonstein, taken along a 300-km traverse of the central Appalachian basin, contain cogenetic phenocrysts and trapped silicate-melt inclusions of a rhyolitic magma. The
Authors
C. L. Rice, Harvey E. Belkin, T.W. Henry, R. E. Zartman, Michael J. Kunk
Geochemistry and argon thermochronology of the Variscan Sila Batholith, southern Italy: source rocks and magma evolution
The Sila batholith is the largest granitic massif in the Calabria-Peloritan Arc of southern Italy, consisting of syn to post-tectonic, calc-alkaline and metaluminous tonalite to granodiorite, and post-tectonic, peraluminous and strongly peraluminous, two-mica??cordierite??Al silicate granodiorite to leucomonzogranite. Mineral 40Ar/39Ar thermochronologic analyses document Variscan emplacement and c
Authors
R. A. Ayuso, A. Messina, B. de Vivo, S. Russo, L. G. Woodruff, J. F. Sutter, H. E. Belkin
Geochemical data for Jurassic basalts in the Early Mesozoic Newark Basin, New Jersey: The data of G.T. Faust
No abstract available.
Authors
H. E. Belkin, D. F. Fiorito