Results 31 to 40 of about 461 (132)

Eoarchean–Paleoproterozoic Tectonothermal History of the Acasta Gneiss Complex Constrained by Titanite and Apatite Petrochronology

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 7, July 2025.
Abstract Deciphering Earth's earliest geodynamic processes requires temporally constrained chemical and structural data from rare exposures of ancient rocks. One of the most well‐studied of these exposures is the Acasta Gneiss Complex (AGC) in the Northwest Territories, Canada, which contains the oldest known felsic rocks on Earth.
Omar Khalil Droubi, Ann M. Bauer, Chloë Bonamici, William O. Nachlas, Joshua M. Garber, Michael J. Tappa, Jesse R. Reimink   +6 more
wiley   +1 more source

Petrochronology of zircon and monazite in migmatites: structural, textural and geochemical controls in the amphibolite-granulite transition [PDF]

, 2023
A geocronologia U-Pb de zircão e monazita é uma ferramenta essencial para a reconstrução geodinâmica pré-cambriana, com grande aplicabilidade devido à ocorrência comum desses minerais em rochas crustais, alta temperatura de fechamento da difusão de Pb ...
Batista, Laísa de Assis
core   +1 more source

Petrochronology of Alkaline Intrusive Magmatism in the Central High‐Atlas (Morocco) and Relationships With Jurassic Salt Diapirism

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 6, June 2025.
Abstract A striking feature of the Imilchil alkaline province, in the Moroccan Central High Atlas, is the close association of magmatic intrusions with Triassic sediments exhumed by diapirism. This study reports field, petrographic, geochemical and Sr‐Nd isotopic data, as well as new U‐Pb zircon ages, which allow us to constrain the timing of the ...
Youssef Ahechach, Muhammad Ouabid, Françoise Roger, Fleurice Parat, Otmane Raji, Jean‐Marie Dautria, Valérie Bosse, Cheikh Elwali Malainine, Hicham El Messbahi, Hamza Skikra, Jean‐Louis Bodinier   +10 more
wiley   +1 more source

Investigating the secular geochemical and geodynamic evolution of accretionary orogens with zircon petrochronology: A case study from West Antarctica [PDF]

, 2018
Investigating the secular geochemical and geodynamic evolution of accretionary orogens with zircon petrochronology: A case study from West AntarcticabyDemian Alan Nelson Subduction-related processes in accretionary orogens modulate Earth’s geochemistry ...
Nelson, Demian Alan
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Simultaneous Magmatic and Hydrothermal Regimes in Alta–Little Cottonwood Stocks, Utah, USA, Recorded Using Multiphase U-Pb Petrochronology

, 2020
Magmatic and hydrothermal systems are intimately linked, significantly overlapping through time but persisting in different parts of a system. New preliminary U-Pb and trace element petrochronology from zircon and titanite demonstrate the protracted and ...
Clayton W. Forster, Samuel J. Callis, Carl J. Beno, John M. Bartley, Michael A. Stearns, John R. Bowman, Nicholas D. Udy, Daniel D. Riddle   +7 more
core   +1 more source

Strain localization north of the Denali fault: a monazite petrochronology and metamorphic petrology case study in the eastern Alaska Range [PDF]

, 2023
The Denali fault in the eastern Alaska Range has been active as a dextral strike slip fault since at least 52 Ma. The high-grade metamorphic rocks to the north of the fault—the field area of this study—offer a unique view into the middle to lower crust ...
Pedrick, Fiona
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Tectonic Setting and Evolution of Anatectic Melt Composition During Prograde Metamorphism up to UHT Metamorphism: Constraints From P–T–t–Melting Path From Rundvågshetta, Lützow–Holm Complex, East Antarctica

Journal of Metamorphic Geology, Volume 43, Issue 5, Page 467-495, June 2025.
ABSTRACT The pressure–temperature–time (P–T–t) evolution of a metapelitic ultrahigh‐temperature (UHT) granulite from Rundvågshetta (Lützow–Holm Complex, East Antarctica) and chemical evolution of partial melt during the prograde metamorphism up to UHT metamorphism are studied in detail.
Kota Suzuki, Tetsuo Kawakami, Tetsu Kogiso, Shuhei Sakata, Fumiko Higashino, Masanori Yokoi, Shumpei Kudo   +6 more
wiley   +1 more source

Petrochronology of Accessory Minerals in relation to Metamorphism and Fluid-Flow across the Albany-Fraser Orogen and Eucla Basement, Western Australia [PDF]

, 2019
Petrochronology of uranium-bearing accessory minerals (zircon, monazite, rutile and titanite) across the Albany-Fraser Orogen and Eucla basement was undertaken to provide insight into transient metamorphism and fluid-flow events and their link to ...
Chard, Julian Alexander
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Timing of Dike and Sill Emplacement in the Inner Aureole of the Alta Stock, Utah Determined by Zircon and Monazite Petrochronology

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 5, May 2025.
Abstract Detailed geochronology from two compositionally distinct generations of dikes and sills intruded into the Alta metamorphic aureole, north‐central Utah, complement previous geochronologic studies from the Alta stock, providing information on the timing of magmatism and the nature of emplacement.
C. J. Beno, M. A. Stearns, J. R. Bowman, J. M. Bartley, D. P. Fernandez, A. R. C. Kylander‐Clark   +5 more
wiley   +1 more source

Structural analysis and titanite U-Pb petrochronology of major Sveconorwegian shear zones in Telemark, southern Norway [PDF]

, 2021
Kan titanitt petrokronologi bli brukt til å fastslå tidsspennet for deformasjon langs stor-skala skjærsoner? Denne studien vil undersøke dette spørsmålet gjennom geologisk kartlegging av et strukturelt komplekst område i det Svekonorvegiske orogenet i ...
Haugsnes, Vanja Skålnes
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