Zobrazeno 1 - 10 of 43 pro vyhledávání: '"Cynthia Dusel-Bacon"'
1
Extreme sulfur isotope fractionation in the Late Devonian Dry Creek volcanogenic massive sulfide deposit, central Alaska
Autor: Joel W. DesOrmeau, Mostafa Fayek, John F. Slack, W. Ian Ridley, Wayne C. Shanks, Cynthia Dusel-Bacon, Jahandar Ramezani
Publikováno v: Chemical Geology. 513:226-238
The Dry Creek Zn-Pb-Cu-Ag-Au volcanogenic massive sulfide (VMS) deposit, in east-central Alaska, occurs in a Late Devonian sequence of peralkaline rhyolite tuff, minor graphitic argillite, and local peralkaline quartz-porphyry rhyolite intrusions. Pr
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::720c9a22c8d0a40d6dd1e6457e659d38
https://doi.org/10.1016/j.chemgeo.2019.03.007
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3
Apatite fission-track evidence for regional exhumation in the subtropical Eocene, block faulting, and localized fluid flow in east-central Alaska
Autor: Paul B. O'Sullivan, Warren C. Day, Charles R. Bacon, Cynthia Dusel-Bacon
Publikováno v: Canadian Journal of Earth Sciences. 53:260-280
The origin and antiquity of the subdued topography of the Yukon–Tanana Upland (YTU), the physiographic province between the Denali and Tintina faults, are unresolved questions in the geologic history of interior Alaska and adjacent Yukon. We presen
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::912c510ddf4da27d5dab94e6506f6989
https://doi.org/10.1139/cjes-2015-0138
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4
Mesozoic magmatism and timing of epigenetic Pb-Zn-Ag mineralization in the western Fortymile mining district, east-central Alaska: Zircon U-Pb geochronology, whole-rock geochemistry, and Pb isotopes
Autor: Warren C. Day, John N. Aleinikoff, Cynthia Dusel-Bacon, James K. Mortensen
Publikováno v: Geosphere. 11:786-822
The Mesozoic magmatic history of the North American margin records the evolution from a more segmented assemblage of parautochthonous and allochthonous terranes to the more cohesive northern Cordilleran orogenic belt. We characterize the setting of m
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8b37fa9b133d1f5986f92dca98b1fe2e
https://doi.org/10.1130/ges01092.1
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6
The Late Cretaceous Middle Fork caldera, its resurgent intrusion, and enduring landscape stability in east-central Alaska
Autor: Cynthia Dusel-Bacon, Charles R. Bacon, John N. Aleinikoff, John F. Slack
Publikováno v: Geosphere. 10:1432-1455
Dissected caldera structures expose thick intracaldera tuff and, uncommonly, cogenetic shallow plutons, while remnants of correlative outflow tuffs deposited on the pre-eruption ground surface record elements of ancient landscapes. The Middle Fork ca
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::dea8fbe5a01f9b207de59f2a382d1542
https://doi.org/10.1130/ges01037.1
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7
Geochemistry, petrography, and zircon U–Pb geochronology of Paleozoic metaigneous rocks in the Mount Veta area of east-central Alaska: implications for the evolution of the westernmost part of the Yukon–Tanana terrane
Autor: Cynthia Dusel-Bacon, Warren C. Day, John N. Aleinikoff
Publikováno v: Canadian Journal of Earth Sciences. 50:826-846
We report the results of new mapping, whole-rock major, minor, and trace-element geochemistry, and petrography for metaigneous rocks from the Mount Veta area in the westernmost part of the allochthonous Yukon–Tanana terrane (YTT) in east-central Al
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8cce0741b00a757a5bb2f2556d3c25a3
https://doi.org/10.1139/cjes-2013-0004
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8
Peralkaline- and Calc-Alkaline-Hosted Volcanogenic Massive Sulfide Deposits of the Bonnifield District, East-Central Alaska
Autor: Robert L. Oscarson, Cynthia Dusel-Bacon, Nora K. Foley, John F. Slack, Alan E. Koenig
Publikováno v: Economic Geology. 107:1403-1432
Volcanogenic massive sulfide (VMS) Zn-Pb-Cu-Ag-Au deposits of the Bonnifield mining district formed during Late Devonian-Early Mississippian magmatism along the western edge of Laurentia. The largest deposits, Dry Creek and WTF, have a combined resou
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::53e47a35333075fcb20acf15fcbb5af6
https://doi.org/10.2113/econgeo.107.7.1403
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9
Evidence for prolonged mid-Paleozoic plutonism and ages of crustal sources in east-central Alaska from SHRIMP U–Pb dating of syn-magmatic, inherited, and detrital zircon
Autor: Ian S. Williams, Cynthia Dusel-Bacon
Publikováno v: Canadian Journal of Earth Sciences. 46:21-39
Sensitive high-resolution ion microprobe (SHRIMP) U–Pb analyses of igneous zircons from the Lake George assemblage in the eastern Yukon–Tanana Upland (Tanacross quadrangle) indicate both Late Devonian (∼370 Ma) and Early Mississippian (∼350 M
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2442063f7bb12a42f5868b77d974d8ff
https://doi.org/10.1139/e09-005
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10
Environmental geochemistry at Red Mountain, an unmined volcanogenic massive sulphide deposit in the Bonnifield district,Alaska Range, east-central Alaska
Autor: Robert G. Eppinger, Cynthia Dusel-Bacon, Paul H. Briggs, Stuart A. Giles, Bernard E. Hubbard, Jane M. Hammarstrom, Larry P. Gough
Publikováno v: Geochemistry: Exploration, Environment, Analysis. 7:207-223
The unmined, pyrite-rich Red Mountain (Dry Creek) deposit displays a remarkable environmental footprint of natural acid generation, high metal and exceedingly high rare earth element (REE) concentrations in surface waters. The volcanogenic massive su
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::efde5519f99b375c2b5cad31295b8dc7
https://doi.org/10.1144/1467-7873/07-136
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