Results 91 to 100 of about 4,777,907 (176)

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   +1 more source

Detrital zircon ages, Lu‐Hf isotopes of zircon grains, Sr‐Nd isotopes on whole rock and geochemistry of Campanian turbidites in the Eastern Pontides (NE Türkiye): A provenance assessment and Gondwana records

The Depositional Record, Volume 12, Issue 4, September 2026.
These findings confirm that the Campanian‐aged Bozbent Member turbiditic sequence in the Eastern Pontides was deposited in an extensional fore‐arc basin and therefore exhibits the petrographic and geochemical characteristics of passive margin sandstones.
Çiğdem Saydam Eker, Cem Yücel, Abdullah Kaygusuz, Emre Aydınçakır, Youn‐Joong Jeong, Sinan Yılmazer, Kadir Sünnetçi   +6 more
wiley   +1 more source

A database of detrital zircon U–Pb geochronology and Hf isotopes from the Songpan–Ganzi and Western Qinling terranes

Geoscience Data Journal
Since the advent of detrital geochronology, significant progress has been made in the study of sedimentary sources. The detrital zircon U–Pb age spectrum, especially when combined with zircon Hf isotopes, provides a powerful tool for determining the ...
Yingdi Pan, Xiumian Hu
doaj   +1 more source

Geochronological Constraints on Diachronous Post‐Collisional Slab Breakoff Along the Paleo‐Tethyan Sutures

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 9, September 2026.
Abstract The slab breakoff model is a preferred geodynamic interpretation for post‐collisional exhumation and associated magmatic flare‐ups. In this study, rutile U–Pb dating of retrograde eclogites revealed distinct stages of exhumation along the Paleo‐Tethyan sutures in southwest China. The studied samples yielded ages of 246.7 ± 8.5 and 239.7 ± 14.0 
Min Liu, Hao Wu, Xi‐Jun Liu, Rong‐Guo Hu, Si‐Nan Lv, Xiao‐Xiao Hu, Yao Xiao, Hao‐Dong Wei   +7 more
wiley   +1 more source

Inception and Plate Evolution of the Lau Back‐Arc Basin From Plate Boundary Refinements

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 9, September 2026.
Abstract Back‐arc basins are important settings for crustal growth that form in response to both near and far‐field tectonic influences. To better understand the processes that control back‐arc basin initiation and evolution, we present a refined model of the kinematics of opening of the Lau Basin, embedded in a global plate model.
Alan T. Baxter, Mark D. Hannington, Kaitlyn Breker, Christopher Galley, Marc L. Fassbender, Erin Bethell   +5 more
wiley   +1 more source

Geochemistry, Sm-Nd isotopes and SHRIMP U-Pb geochronology of the Morro do Coco Granite (RJ, Brazil): another piece of the post-collisional magmatism of the Ribeira Belt

Brazilian Journal of Geology
The Morro do Coco granite (MC) is a post-collisional intrusive body that was emplaced at Ribeira Belt, in the Cambro-Ordovician, succeeding the final stages of the Gondwana supercontinent amalgamation.
Fellippe Roberto Alves Bione, Everton Marques Bongiolo, Julio Cezar Mendes, Camila Leão Roland   +3 more
doaj   +1 more source

Brine Pool Microbes Enrich Metalliferous Sediments in Salt Giant Basins

AGU Advances, Volume 7, Issue 6, September 2026.
Abstract We report the discovery of an extinct deep‐sea brine pool in the Red Sea's Hume Deep, providing evidence that rift‐shoulder pools are ephemeral on millennial timescales, and that the microbially‐enriched metalliferous deposits produced during the pool's active phase persist into the stratigraphic record.
Morgan I. Chakraborty, Hannah Shernisky, Clément G. L. Pollier, Amanda M. Oehlert, Arash Sharifi, Ali Pourmand, Bolton J. Howes, Benjamin Minch, Mohammad Moniruzzaman, Larissa Frühe, Mattie Rodrigue, Sam J. Purkis   +11 more
wiley   +1 more source

Deep Crustal Magma‐Water Interaction During Oceanic Core Complex Termination of the Godzilla Megamullion in the Parece Vela Basin

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 9, September 2026.
Abstract Oceanic Core Complexes (OCCs) in back‐arc basins are not as thoroughly investigated, and their termination processes remain poorly understood. The Godzilla Megamullion is the largest known ceased OCC on Earth, yet magmatic and hydrothermal records from its termination are lacking.
Han‐Tao Chi, Guo‐Liang Zhang, Ji Zhang, Chang‐Ming Lu   +3 more
wiley   +1 more source

Long-term repeatability and interlaboratory reproducibility of high-precision ID-TIMS U-Pb geochronology.

J Anal At Spectrom, 2021
Schaltegger U, Schaltegger U, Ovtcharova M, Gaynor SP, Schoene B, Wotzlaw JF, Davies JFHL, Farina F, Greber ND, Szymanowski D, Chelle-Michou C.   +10 more
europepmc   +1 more source

Past the First Date: Ensemble Concordant–Discordant Comparison for Zircon Pb‐Loss Analysis

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 9, September 2026.
Abstract Zircon uranium–lead (U–Pb) geochronology is a cornerstone of Earth science for resolving the timing of deep‐time processes, yet the U–Pb system does not always behave as a closed chronometer. Selective loss of radiogenic Pb during fluid alteration or thermal disturbance can shift isotopic ages and generate discordant analyses. Some zircon data
Lucy M. Mathieson, Christopher L. Kirkland   +1 more
wiley   +1 more source