Results 91 to 100 of about 4,823,697 (162)

Apatite as a Proxy for Reconstructing Magma Mixing Histories in Granitoids

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 10, October 2026.
Abstract Apatite is a common accessory mineral in granites and mafic microgranular enclaves (MMEs), and its textural and compositional characteristics can record dynamic magmatic evolution processes. Apatites from the Early Cretaceous Sanguliu granite and its MMEs in the Liaodong Peninsula exhibit pronounced compositional heterogeneities. In this study,
Xiaowen Lin, Jiahao Zheng, Wanyi Feng
wiley   +1 more source

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

Multiple Subduction–Exhumation Cycles and Episodic Hydration–Metasomatism of an Oceanic Eclogite Block: Implications for Thermal Structure Evolution and Mass Transfer at the Subduction Interface

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 10, October 2026.
Abstract The rarity of natural rocks that specifically record the physicochemical conditions of the subduction interface strongly hampers pertinent studies on metamorphic trajectories of high‐pressure (HP) rocks and related fluid–rock interactions. This study examines an oceanic eclogite block from the Huwan shear zone in the Hong'an orogen.
Dadi Cao, Liqing Xu, Xiangxin Zhang, Haofan He, Kang Cheng   +4 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

Diagenetic controls on porosity evolution and pore type organisation in microporous carbonate rocks: Evidence for mesogenetic porosity formation

Sedimentology, Volume 73, Issue 6, Page 2353-2380, October 2026.
ABSTRACT Microporous carbonate rocks typically record complex diagenetic histories driven by microbial activity and fluid interactions within multiple diagenetic environments. The relative roles of meteoric and burial diagenetic processes in pore evolution remain debated, particularly within Cretaceous carbonate systems of the Middle East, as does the ...
Hugues Bitault, Cathy Hollis, Alain Tonetto, Pierre Deschamps, Philippe Léonide, François Fournier   +5 more
wiley   +1 more source

Evidence for the continental origin of Pliocene deposits in the central Baja California peninsula, Mexico, and implications for controls on biodiversity

Sedimentology, Volume 73, Issue 6, Page 2488-2518, October 2026.
ABSTRACT Previous studies have documented genetic divergence within the last few million years between northern and southern populations of terrestrial plants and animals along the Baja California peninsula, with many studies hypothesising that the divergence is due to an ancient seaway that crossed the central peninsula and created a physical barrier ...
Kevin K. Gardner, Rebecca J. Dorsey, Stephen T. Hasiotis, José Luis Antinao, Michael H. Darin, Scott E. K. Bennett, Matthew Heizler, Greer Dolby, Brian Hausback   +8 more
wiley   +1 more source

A Shallow‐Marine Ecosystem Before Initial Tibetan Plateau Uplift

Geophysical Research Letters, Volume 53, Issue 18, 28 September 2026.
Abstract The uplift of the Tibetan Plateau profoundly influences global atmospheric circulation, sediment transport, and biodiversity, but its pre‐uplift marine paleoenvironment remains poorly understood. Here we report the first discovery of an in situ benthic fossil assemblage from the Puga area in central Tibet, which was deposited on a shallow ...
Ming Wang, Xin Rao, Richard M. Palin, Peter W. Skelton, Wenjiao Xiao, Yuhe Zhang, Binxuan Hao, Dongfang Song, Bo Wang, Yangrui Guo, Tingting Yu, Kun Liang, Felix Schlagintweit   +12 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
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.
Lucy M. Mathieson, Christopher L. Kirkland   +1 more
doaj   +1 more source

GZ7 and GZ8 - Two Zircon Reference Materials for SIMS U-Pb Geochronology. [PDF]

Geostand Geoanal Res, 2018
Nasdala L, Corfu F, Schoene B, Tapster SR, Wall CJ, Schmitz MD, Ovtcharova M, Schaltegger U, Kennedy AK, Kronz A, Reiners PW, Yang YH, Wu FY, Gain SEM, Griffin WL, Szymanowski D, Chanmuang N C, Ende M, Valley JW, Spicuzza MJ, Wanthanachaisaeng B, Giester G.   +21 more
europepmc   +1 more source