Charles H Thorman (Former Employee)
Science and Products
Filter Total Items: 26
Pulsed Mesozoic deformation in the Cordilleran hinterland and evolution of the Nevadaplano: Insights from the Pequop Mountains, NE Nevada Pulsed Mesozoic deformation in the Cordilleran hinterland and evolution of the Nevadaplano: Insights from the Pequop Mountains, NE Nevada
Mesozoic crustal shortening in the North American Cordillera’s hinterland was related to the construction of the Nevadaplano orogenic plateau. Petrologic and geochemical proxies in Cordilleran core complexes suggest substantial Late Cretaceous crustal thickening during plateau construction. In eastern Nevada, geobarometry from the Snake Range and Ruby Mountains-East Humboldt Range-Wood...
Authors
Andrew V Zuza, Charles H. Thorman, Christopher D. Henry, Drew A. Levy, Seth Dee, Sean P. Long, Charles Sandberg, Emmanuel Soignard
The geology of the Morro Velho gold deposit in the Archean Rio das Velhas greenstone belt, Quadrilátero Ferrífero, Brazil The geology of the Morro Velho gold deposit in the Archean Rio das Velhas greenstone belt, Quadrilátero Ferrífero, Brazil
The Morro Velho gold deposit, Quadrilátero Ferrífero region, Minas Gerais, Brazil, is hosted by rocks at the base of the Archean Rio das Velhas greenstone belt. The deposit occurs within a thick carbonaceous phyllite package, containing intercalations of felsic and intermediate volcaniclastic rocks and dolomites. Considering the temporal and spatial association of the deposit with the...
Authors
Diogenes Scipioni Vial, Ed DeWitt, Lydia Maria Lobato, Charles H. Thorman
Geological assessment of Liberia's diamond producing regions, diamond production potential and review of Liberia's production history Geological assessment of Liberia's diamond producing regions, diamond production potential and review of Liberia's production history
No abstract available.
Authors
Charles H. Thorman, Karin O. Hoal
Major brazilian gold deposits - 1982 to 1999 Major brazilian gold deposits - 1982 to 1999
Brazil has been a major but intermittent producer of gold since its discovery in 1500. Brazil led the world in gold production during the 18th and early 19th centuries. From the late 19th century to the late 20th century, total mining company and garimpeiro production was small and relatively constant at about 5 to 8 t/year. The discovery of alluvial deposits in the Amazon by garimpeiros...
Authors
C.H. Thorman, E. Dewitt, M.A. Maron, E.A. Ladeira
The mineral economy of Brazil--Economia mineral do Brasil The mineral economy of Brazil--Economia mineral do Brasil
This study depicts the Brazilian government structure, mineral legislation and investment policy, taxation, foreign investment policies, environmental laws and regulations, and conditions in which the mineral industry operates. The report underlines Brazil's large and diversified mineral endowment. A total of 37 mineral commodities, or groups of closely related commodities, is discussed...
Authors
Alfredo C. Gurmendi, Frederico Lopes Barboza, Charles H. Thorman
Summary of chemical analyses and 40Ar/39Ar age-spectra data for Eocene volcanic rocks from the central part of the Northeast Nevada volcanic field Summary of chemical analyses and 40Ar/39Ar age-spectra data for Eocene volcanic rocks from the central part of the Northeast Nevada volcanic field
No abstract available.
Authors
William E. Brooks, Charles H. Thorman, Lawrence W. Snee, Constance J. Nutt, Christopher J. Potter, Russell F. Dubiel
The 40Ar/39Ar ages and tectonic setting of the Middle Eocene northeast Nevada volcanic field The 40Ar/39Ar ages and tectonic setting of the Middle Eocene northeast Nevada volcanic field
Widespread middle to late Eocene calc-alkalic volcanism, which formed the Northeast Nevada Volcanic Field, marks the earliest Tertiary volcanism in the northern Basin and Range. The central part of this major field in northeast Nevada and adjacent Utah is herein defined by 23 40Ar/39Ar ages that range from 42.6 to 39.0 Ma, rock chemistry from 12 localities, stratigraphic position of the...
Authors
W. E. Brooks, C.H. Thorman, L.W. Snee
USGS research on mineral resources, 1994: Part B, Guide book for field trips USGS research on mineral resources, 1994: Part B, Guide book for field trips
No abstract available.
Authors
D. E. Lane
Field trip guide to the southern East Humboldt Range and northern Currie Hills, Northeast Nevada; age and style of attenuation faults in Permian and Triassic rocks Field trip guide to the southern East Humboldt Range and northern Currie Hills, Northeast Nevada; age and style of attenuation faults in Permian and Triassic rocks
No abstract available.
Authors
C.H. Thorman, W. E. Brooks
Geologic map of the Weaver Canyon, Nevada and Utah, Quadrangle and parts of the Ibapah Peak, Utah, and Tippett Canyon, Nevada, quadrangles Geologic map of the Weaver Canyon, Nevada and Utah, Quadrangle and parts of the Ibapah Peak, Utah, and Tippett Canyon, Nevada, quadrangles
No abstract available.
Authors
C.J. Nutt, C.H. Thorman
Gold deposits related to greenstone belts in Brazil; deposit modeling workshop; Part A, excursions Gold deposits related to greenstone belts in Brazil; deposit modeling workshop; Part A, excursions
No abstract available.
Authors
Charles H. Thorman, Eduardo A. Ladeira, Diane C. Schnabel
Science and Products
Filter Total Items: 26
Pulsed Mesozoic deformation in the Cordilleran hinterland and evolution of the Nevadaplano: Insights from the Pequop Mountains, NE Nevada Pulsed Mesozoic deformation in the Cordilleran hinterland and evolution of the Nevadaplano: Insights from the Pequop Mountains, NE Nevada
Mesozoic crustal shortening in the North American Cordillera’s hinterland was related to the construction of the Nevadaplano orogenic plateau. Petrologic and geochemical proxies in Cordilleran core complexes suggest substantial Late Cretaceous crustal thickening during plateau construction. In eastern Nevada, geobarometry from the Snake Range and Ruby Mountains-East Humboldt Range-Wood...
Authors
Andrew V Zuza, Charles H. Thorman, Christopher D. Henry, Drew A. Levy, Seth Dee, Sean P. Long, Charles Sandberg, Emmanuel Soignard
The geology of the Morro Velho gold deposit in the Archean Rio das Velhas greenstone belt, Quadrilátero Ferrífero, Brazil The geology of the Morro Velho gold deposit in the Archean Rio das Velhas greenstone belt, Quadrilátero Ferrífero, Brazil
The Morro Velho gold deposit, Quadrilátero Ferrífero region, Minas Gerais, Brazil, is hosted by rocks at the base of the Archean Rio das Velhas greenstone belt. The deposit occurs within a thick carbonaceous phyllite package, containing intercalations of felsic and intermediate volcaniclastic rocks and dolomites. Considering the temporal and spatial association of the deposit with the...
Authors
Diogenes Scipioni Vial, Ed DeWitt, Lydia Maria Lobato, Charles H. Thorman
Geological assessment of Liberia's diamond producing regions, diamond production potential and review of Liberia's production history Geological assessment of Liberia's diamond producing regions, diamond production potential and review of Liberia's production history
No abstract available.
Authors
Charles H. Thorman, Karin O. Hoal
Major brazilian gold deposits - 1982 to 1999 Major brazilian gold deposits - 1982 to 1999
Brazil has been a major but intermittent producer of gold since its discovery in 1500. Brazil led the world in gold production during the 18th and early 19th centuries. From the late 19th century to the late 20th century, total mining company and garimpeiro production was small and relatively constant at about 5 to 8 t/year. The discovery of alluvial deposits in the Amazon by garimpeiros...
Authors
C.H. Thorman, E. Dewitt, M.A. Maron, E.A. Ladeira
The mineral economy of Brazil--Economia mineral do Brasil The mineral economy of Brazil--Economia mineral do Brasil
This study depicts the Brazilian government structure, mineral legislation and investment policy, taxation, foreign investment policies, environmental laws and regulations, and conditions in which the mineral industry operates. The report underlines Brazil's large and diversified mineral endowment. A total of 37 mineral commodities, or groups of closely related commodities, is discussed...
Authors
Alfredo C. Gurmendi, Frederico Lopes Barboza, Charles H. Thorman
Summary of chemical analyses and 40Ar/39Ar age-spectra data for Eocene volcanic rocks from the central part of the Northeast Nevada volcanic field Summary of chemical analyses and 40Ar/39Ar age-spectra data for Eocene volcanic rocks from the central part of the Northeast Nevada volcanic field
No abstract available.
Authors
William E. Brooks, Charles H. Thorman, Lawrence W. Snee, Constance J. Nutt, Christopher J. Potter, Russell F. Dubiel
The 40Ar/39Ar ages and tectonic setting of the Middle Eocene northeast Nevada volcanic field The 40Ar/39Ar ages and tectonic setting of the Middle Eocene northeast Nevada volcanic field
Widespread middle to late Eocene calc-alkalic volcanism, which formed the Northeast Nevada Volcanic Field, marks the earliest Tertiary volcanism in the northern Basin and Range. The central part of this major field in northeast Nevada and adjacent Utah is herein defined by 23 40Ar/39Ar ages that range from 42.6 to 39.0 Ma, rock chemistry from 12 localities, stratigraphic position of the...
Authors
W. E. Brooks, C.H. Thorman, L.W. Snee
USGS research on mineral resources, 1994: Part B, Guide book for field trips USGS research on mineral resources, 1994: Part B, Guide book for field trips
No abstract available.
Authors
D. E. Lane
Field trip guide to the southern East Humboldt Range and northern Currie Hills, Northeast Nevada; age and style of attenuation faults in Permian and Triassic rocks Field trip guide to the southern East Humboldt Range and northern Currie Hills, Northeast Nevada; age and style of attenuation faults in Permian and Triassic rocks
No abstract available.
Authors
C.H. Thorman, W. E. Brooks
Geologic map of the Weaver Canyon, Nevada and Utah, Quadrangle and parts of the Ibapah Peak, Utah, and Tippett Canyon, Nevada, quadrangles Geologic map of the Weaver Canyon, Nevada and Utah, Quadrangle and parts of the Ibapah Peak, Utah, and Tippett Canyon, Nevada, quadrangles
No abstract available.
Authors
C.J. Nutt, C.H. Thorman
Gold deposits related to greenstone belts in Brazil; deposit modeling workshop; Part A, excursions Gold deposits related to greenstone belts in Brazil; deposit modeling workshop; Part A, excursions
No abstract available.
Authors
Charles H. Thorman, Eduardo A. Ladeira, Diane C. Schnabel