Results 11 to 20 of about 1,181 (167)

Metasomatism and Mélange Development at the Conditions of Modern Deep Slow Slip: P‐T‐t Evolution of Metasomatic Rocks (Pimu'nga/Santa Catalina Island, CA)

Geochemistry, Geophysics, Geosystems
The subduction interface hosts megathrust earthquakes and ductile creep, is fluid‐rich and chemically dynamic, and produces metasomatic rocks that may host episodic tremor and slow slip (ETS).
W. Hoover, C. B. Condit, A. Moser, S. Mulcahy, P. C. Lindquist, V. E. Guevara   +5 more
doaj   +2 more sources

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

Geochemistry, Geophysics, Geosystems
Deciphering Earth's earliest geodynamic processes requires temporally constrained chemical and structural data from rare exposures of ancient rocks.
Omar Khalil Droubi, Ann M. Bauer, Chloë Bonamici, William O. Nachlas, Joshua M. Garber, Michael J. Tappa, Jesse R. Reimink   +6 more
doaj   +2 more sources

Timing of Dike and Sill Emplacement in the Inner Aureole of the Alta Stock, Utah Determined by Zircon and Monazite Petrochronology

Geochemistry, Geophysics, Geosystems
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
C. J. Beno, M. A. Stearns, J. R. Bowman, J. M. Bartley, D. P. Fernandez, A. R. C. Kylander‐Clark   +5 more
doaj   +2 more sources

Petrochronology of polygenetic white micas (Naxos, Greece) [PDF]

Journal of Metamorphic Geology, 2022
Naxos in the Greek Cyclades preserves a type example of polymetamorphism. The southern and northern parts of the island record different Tertiary P–T histories between Eocene and Miocene times, including a blueschist facies event, one or more amphibolite/
Glodny, Johannes, Peillod, Alexandre, Ring, Uwe, Skelton, Alasdair, Villa, Igor M.   +4 more
core   +7 more sources

The Addition of Felsic Sediments to the Lower Continental Crust During the Variscan Orogeny

Geochemistry, Geophysics, Geosystems
Lower crustal metasedimentary xenoliths (garnet‐sillimanite granulites) from the Bournac breccia pipe in the Massif Central, France, provide a robust example of sediments transported to depth and incorporated into stable lower continental crust during a ...
M. F. Ringwood, S. E. Ortner, R. L. Rudnick   +2 more
doaj   +2 more sources

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

Geochemistry, Geophysics, Geosystems
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
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
doaj   +2 more sources

Author Correction: Age of the magma chamber and its physicochemical state under Elbrus Greater Caucasus, Russia using zircon petrochronology and modeling insights [PDF]

Scientific Reports, 2023
I. N. Bindeman, O. E. Melnik, M. Guillong, I. S. Utkin, J.-F. Wotzlaw, A. K. Schmitt, R. A. Stern   +6 more
doaj   +2 more sources

Developing an inverted Barrovian sequence; insights from monazite petrochronology [PDF]

Earth and Planetary Science Letters, 2014
AbstractIn the Himalayan region of Sikkim, the well-developed inverted metamorphic sequence of the Main Central Thrust (MCT) zone is folded, thus exposing several transects through the structure that reached similar metamorphic grades at different times.
Catherine M Mottram, Clare J Warren, Daniele Regis   +2 more
exaly   +4 more sources

Zircon – Tiny but Telling: A Petrochronological Study [PDF]

This thesis concerns the field of petrochronology, where time is linked to the physical conditions (e.g., pressure P and temperature T) of rock-forming events, to provide better constraints on key geological processes such as mountain building ...
Streicher, Linus Bijan
core   +3 more sources

Technical note: Rapid phase identification of apatite and zircon grains for geochronology using X-ray micro-computed tomography [PDF]

Geochronology, 2022
Apatite and zircon are among the best-studied and most widely used accessory minerals for geochronology and thermochronology. Given that apatite and zircon are often present in the same lithologies, distinguishing the two phases in crushed mineral ...
E. H. G. Cooperdock, F. Hofmann, F. Hofmann, R. M. C. Tibbetts, A. Carrera, A. Takase, A. J. Celestian   +6 more
doaj   +1 more source