Rosalind Tuthill Helz, Ph.D. (Former Employee)
Science and Products
Filter Total Items: 47
Geothermometry of Kilauea Iki lava lake, Hawaii Geothermometry of Kilauea Iki lava lake, Hawaii
Data on the variation of temperature with time and in space are essential to a complete understanding of the crystallization history of basaltic magma in Kilauea Iki lava lake. Methods used to determine temperatures in the lake have included direct, downhole thermocouple measurements and Fe-Ti oxide geothermometry. In addition, the temperature variations of MgO and CaO contents of...
Authors
Rosalind Tuthill Helz, C.R. Thornber
The distribution of vesicles and olivine phenocrysts in samples from drill hole KI 79-3, Kilauea Iki lava lake, Hawaii The distribution of vesicles and olivine phenocrysts in samples from drill hole KI 79-3, Kilauea Iki lava lake, Hawaii
No abstract available.
Authors
M. T. Mangan, Rosalind Tuthill Helz
A Catalogue of drill core recovered from Kilauea Iki lava lake from 1967 to 1979 A Catalogue of drill core recovered from Kilauea Iki lava lake from 1967 to 1979
No abstract available.
Authors
Rosalind Tuthill Helz, N.G. Banks, T. J. Casadevall, R.S. Fiske, R. B. Moore
Drilling report and core logs for the 1981 drilling of Kilauea Iki lava lake (Kilauea Volcano, Hawaii), with comparative notes on earlier (1967-1979) drilling experiences Drilling report and core logs for the 1981 drilling of Kilauea Iki lava lake (Kilauea Volcano, Hawaii), with comparative notes on earlier (1967-1979) drilling experiences
No abstract available.
Authors
Rosalind Tuthill Helz, Thomas L. Wright
Crystallization history of Kilauea Iki lava lake as seen in drill core recovered in 1967-1979 Crystallization history of Kilauea Iki lava lake as seen in drill core recovered in 1967-1979
Kilauea Iki lava lake formed during the 1959 summit eruption, one of the most picritic eruptions of Kilauea Volcano in the twentieth century. Since 1959 the 110 to 122 m thick lake has cooled slowly, developing steadily thickening upper and lower crusts, with a lens of more molten lava in between. Recent coring dates, with maximum depths reached in the center of the lake, are: 1967 (26.5...
Authors
Rosalind Tuthill Helz
The 1977 eruption of Kilauea volcano, Hawaii The 1977 eruption of Kilauea volcano, Hawaii
Kilauea volcano began to erupt on September 13, 1977, after a 21.5-month period of quiescence. Harmonic tremor in the upper and central east rift zone and rapid deflation of the summit area occurred for 22 hours before the outbreak of surface activity. On the first night, spatter ramparts formed along a discontinuous, en-echelon, 5.5-km-long fissure system that trends N70??E between two
Authors
R. B. Moore, Rosalind Tuthill Helz, D. Dzurisin, G. P. Eaton, R. Y. Koyanagi, P. W. Lipman, J. P. Lockwood, G. S. Puniwai
A catalogue of drill core recovered from Kilauea Iki lava lake, from 1967 to 1979 A catalogue of drill core recovered from Kilauea Iki lava lake, from 1967 to 1979
The purpose of this report is to serve as a descriptive catalogue for drill core recovered from Kilauea Iki lava lake, from 1967 to 1979. Kilauea Iki lava lake was formed when lavas of the 1959 summit eruption were ponded in Kilauea Iki pit crater, a large pit crater at the extreme upper end of Kilauea's east rift zone (Fig. 1). This eruption is one of the best documented of Kilauean...
Authors
Rosalind Tuthill Helz, Norman G. Banks, Thomas J. Casadevall, Richard S. Fiske, R. B. Moore
Bedrock geologic map of the vent system for the Ice Harbor Member of the Saddle Mountains Basalt, Ice Harbor Dam-Basin City area, southeast Washington Bedrock geologic map of the vent system for the Ice Harbor Member of the Saddle Mountains Basalt, Ice Harbor Dam-Basin City area, southeast Washington
No abstract available.
Authors
Donald A. Swanson, Rosalind Tuthill Helz
Major oxide, trace element, and glass chemistry of Columbia River basalt samples collected between 1971 and 1977 Major oxide, trace element, and glass chemistry of Columbia River basalt samples collected between 1971 and 1977
In this report we are making available all chemical analyses of whole rocks and selected glasses for samples of Columbia River Basalt that we collected between 1971 and 1977 during reconnaissance geologic mapping of the Columbia Plateau.
Authors
Thomas L. Wright, Donald A. Swanson, Rosalind Tuthill Helz, G. R. Byerly
Reconnaissance geologic map of the Columbia River Basalt Group, Pullman and Walla Walla quadrangles, southeast Washington and adjacent Idaho Reconnaissance geologic map of the Columbia River Basalt Group, Pullman and Walla Walla quadrangles, southeast Washington and adjacent Idaho
No abstract available.
Authors
D. A. Swanson, T. L. Wright, V.E. Camp, J. N. Gardner, Rosalind Tuthill Helz, S.A. Price, M.E. Ross
Phase relations of basalts in their melting range at PH2O = 5 kb as a function of oxygen fugacity: Part I. Mafic phases Phase relations of basalts in their melting range at PH2O = 5 kb as a function of oxygen fugacity: Part I. Mafic phases
The phase relations of three basalts, the Picture Gorge tholeiite, the 1921 Kilauea olivine tholeiite, and the 1801 Hualalai alkali basalt, were studied at 5 kb water pressure, 680–1000°C, at the oxygen fugacities of the quartz-fayalite-magnetite (QFM) and hematite-magnetite (HM) buffers. In the range 680–850 °C, the crystalline assemblage on the QFM buffer is dominantly hornblende+...
Authors
Rosalind Tuthill Helz
Science and Products
Filter Total Items: 47
Geothermometry of Kilauea Iki lava lake, Hawaii Geothermometry of Kilauea Iki lava lake, Hawaii
Data on the variation of temperature with time and in space are essential to a complete understanding of the crystallization history of basaltic magma in Kilauea Iki lava lake. Methods used to determine temperatures in the lake have included direct, downhole thermocouple measurements and Fe-Ti oxide geothermometry. In addition, the temperature variations of MgO and CaO contents of...
Authors
Rosalind Tuthill Helz, C.R. Thornber
The distribution of vesicles and olivine phenocrysts in samples from drill hole KI 79-3, Kilauea Iki lava lake, Hawaii The distribution of vesicles and olivine phenocrysts in samples from drill hole KI 79-3, Kilauea Iki lava lake, Hawaii
No abstract available.
Authors
M. T. Mangan, Rosalind Tuthill Helz
A Catalogue of drill core recovered from Kilauea Iki lava lake from 1967 to 1979 A Catalogue of drill core recovered from Kilauea Iki lava lake from 1967 to 1979
No abstract available.
Authors
Rosalind Tuthill Helz, N.G. Banks, T. J. Casadevall, R.S. Fiske, R. B. Moore
Drilling report and core logs for the 1981 drilling of Kilauea Iki lava lake (Kilauea Volcano, Hawaii), with comparative notes on earlier (1967-1979) drilling experiences Drilling report and core logs for the 1981 drilling of Kilauea Iki lava lake (Kilauea Volcano, Hawaii), with comparative notes on earlier (1967-1979) drilling experiences
No abstract available.
Authors
Rosalind Tuthill Helz, Thomas L. Wright
Crystallization history of Kilauea Iki lava lake as seen in drill core recovered in 1967-1979 Crystallization history of Kilauea Iki lava lake as seen in drill core recovered in 1967-1979
Kilauea Iki lava lake formed during the 1959 summit eruption, one of the most picritic eruptions of Kilauea Volcano in the twentieth century. Since 1959 the 110 to 122 m thick lake has cooled slowly, developing steadily thickening upper and lower crusts, with a lens of more molten lava in between. Recent coring dates, with maximum depths reached in the center of the lake, are: 1967 (26.5...
Authors
Rosalind Tuthill Helz
The 1977 eruption of Kilauea volcano, Hawaii The 1977 eruption of Kilauea volcano, Hawaii
Kilauea volcano began to erupt on September 13, 1977, after a 21.5-month period of quiescence. Harmonic tremor in the upper and central east rift zone and rapid deflation of the summit area occurred for 22 hours before the outbreak of surface activity. On the first night, spatter ramparts formed along a discontinuous, en-echelon, 5.5-km-long fissure system that trends N70??E between two
Authors
R. B. Moore, Rosalind Tuthill Helz, D. Dzurisin, G. P. Eaton, R. Y. Koyanagi, P. W. Lipman, J. P. Lockwood, G. S. Puniwai
A catalogue of drill core recovered from Kilauea Iki lava lake, from 1967 to 1979 A catalogue of drill core recovered from Kilauea Iki lava lake, from 1967 to 1979
The purpose of this report is to serve as a descriptive catalogue for drill core recovered from Kilauea Iki lava lake, from 1967 to 1979. Kilauea Iki lava lake was formed when lavas of the 1959 summit eruption were ponded in Kilauea Iki pit crater, a large pit crater at the extreme upper end of Kilauea's east rift zone (Fig. 1). This eruption is one of the best documented of Kilauean...
Authors
Rosalind Tuthill Helz, Norman G. Banks, Thomas J. Casadevall, Richard S. Fiske, R. B. Moore
Bedrock geologic map of the vent system for the Ice Harbor Member of the Saddle Mountains Basalt, Ice Harbor Dam-Basin City area, southeast Washington Bedrock geologic map of the vent system for the Ice Harbor Member of the Saddle Mountains Basalt, Ice Harbor Dam-Basin City area, southeast Washington
No abstract available.
Authors
Donald A. Swanson, Rosalind Tuthill Helz
Major oxide, trace element, and glass chemistry of Columbia River basalt samples collected between 1971 and 1977 Major oxide, trace element, and glass chemistry of Columbia River basalt samples collected between 1971 and 1977
In this report we are making available all chemical analyses of whole rocks and selected glasses for samples of Columbia River Basalt that we collected between 1971 and 1977 during reconnaissance geologic mapping of the Columbia Plateau.
Authors
Thomas L. Wright, Donald A. Swanson, Rosalind Tuthill Helz, G. R. Byerly
Reconnaissance geologic map of the Columbia River Basalt Group, Pullman and Walla Walla quadrangles, southeast Washington and adjacent Idaho Reconnaissance geologic map of the Columbia River Basalt Group, Pullman and Walla Walla quadrangles, southeast Washington and adjacent Idaho
No abstract available.
Authors
D. A. Swanson, T. L. Wright, V.E. Camp, J. N. Gardner, Rosalind Tuthill Helz, S.A. Price, M.E. Ross
Phase relations of basalts in their melting range at PH2O = 5 kb as a function of oxygen fugacity: Part I. Mafic phases Phase relations of basalts in their melting range at PH2O = 5 kb as a function of oxygen fugacity: Part I. Mafic phases
The phase relations of three basalts, the Picture Gorge tholeiite, the 1921 Kilauea olivine tholeiite, and the 1801 Hualalai alkali basalt, were studied at 5 kb water pressure, 680–1000°C, at the oxygen fugacities of the quartz-fayalite-magnetite (QFM) and hematite-magnetite (HM) buffers. In the range 680–850 °C, the crystalline assemblage on the QFM buffer is dominantly hornblende+...
Authors
Rosalind Tuthill Helz