Zobrazeno 1 - 10 of 41 pro vyhledávání: '"Jill A. VanTongeren"'
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Akademický článek
40Ar/39Ar Thermochronology for Submilligram Samples Using a Ta Platform Microfurnace, With Illustrations From the Bushveld Complex
Autor: Jacob B. Setera, Brent D. Turrin, Gregory F. Herzog, Jill A. VanTongeren, Jeremy S. Delaney, Carl C. Swisher III
Publikováno v: Geochemistry, Geophysics, Geosystems, Vol 21, Iss 10, Pp n/a-n/a (2020)
Abstract We present a method for 40Ar/39Ar step‐heating measurements on anhydrous K‐bearing minerals. Samples placed in dimples on Ta foil platforms are heated indirectly with a laser while temperatures are measured with a two‐color pyrometer.
Externí odkaz: https://doaj.org/article/05923b4d90cc485ea1efec63f902ed3e
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Onset of long-lived silicic and alkaline magmatism in eastern North America preceded Central Atlantic Magmatic Province emplacement
Autor: Sean T. Kinney, Scott A. MacLennan, Dawid Szymanowski, C. Brenhin Keller, Jill A. VanTongeren, Jacob B. Setera, Steven J. Jaret, C. Forrest Town, Justin V. Strauss, Dwight C. Bradley, Paul E. Olsen, Blair Schoene
Publikováno v: Geology. 50:1301-1305
The White Mountain magma series is the largest Mesozoic felsic igneous province on the eastern North American margin. Previous geochronology suggests that magmatism occurred over 50 m.y., with ages for the oldest units apparently coeval with the ca.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a701b267d80ffdcabebbee18bcd82700
https://doi.org/10.1130/g50181.1
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4
Grain size and transport biases in an Ediacaran detrital zircon record
Autor: Jill A. VanTongeren, M. Cantine, Jacob Setera, Kristin D. Bergmann, Chiza N Mwinde
Publikováno v: Journal of Sedimentary Research. 91:913-928
Detrital-zircon records of provenance are used to reconstruct paleogeography, sediment sources, and tectonic configuration. Recognition of biases in detrital-zircon records that result from grain-size-dependent processes adds new complexity and cauti
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5044aaacd74da21bfd20ff1d13f1d6b5
https://doi.org/10.2110/jsr.2020.153
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Rapid cooling of the Rustenburg Layered Suite of the Bushveld Complex (South Africa): Insights from biotite 40Ar/39Ar geochronology
Autor: Jill A. VanTongeren, Carl C. Swisher, Brent D. Turrin, Jacob Setera
Publikováno v: Geology. 48:834-838
Despite their importance to understanding magma chamber processes and the formation of economically viable precious metal deposits, the cooling histories of layered mafic intrusions remain enigmatic due to limited geochronologic constraints. We provi
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::865ec6f652641d1984e7a76954c76f8a
https://doi.org/10.1130/g46865.1
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7
The Composition of the Lower Oceanic Crust in the Wadi Khafifah Section of the Southern Samail (Oman) Ophiolite
Autor: Jill A. VanTongeren, K. Hanghoj, Julian A. Pearce, Peter B. Kelemen, Marguerite Godard, M. Braun, Carlos J. Garrido
Publikováno v: Digital.CSIC. Repositorio Institucional del CSIC
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Journal of Geophysical Research : Solid Earth
Journal of Geophysical Research : Solid Earth, American Geophysical Union, 2021, 126 (11), pp.e2021JB021986. ⟨10.1029/2021JB021986⟩
International audience; The composition of the intrusive gabbroic lower oceanic crust remains poorly characterized in comparison to the extrusive portion of the oceanic crust, especially for intermediate-fast spreading mid-ocean ridges. This is a con
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::712488e5d48a56ebbfdd1d683ea34e9b
https://doi.org/10.1029/2021jb021986
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Dating the Bushveld Complex: Timing of Crystallization, Duration of Magmatism, and Cooling of the World’s Largest Layered Intrusion and Related Rocks
Autor: Dominique Weis, Richard M. Friedman, James S. Scoates, Corey J. Wall, Jill A. VanTongeren, E. A. Mathez
Publikováno v: Journal of Petrology. 62
The Paleoproterozoic Bushveld Complex, including the world’s largest layered intrusion and host to world-class stratiform chromium, platinum group element, and vanadium deposits, is a remarkable natural laboratory for investigating the timescales o
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::65888746338640953318a1ab075d6960
https://doi.org/10.1093/petrology/egaa107
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