Results 131 to 140 of about 21,944 (246)
Hornblendite in the Lower Crust: A Possible Source for Porphyry Cu Deposits
Geochemistry, Geophysics, Geosystems, Volume 27, Issue 5, May 2026.Abstract Lower crustal sulfide‐bearing Cu‐rich cumulates, mainly occurring as hornblendite, have been proposed as a critical source component for the development of giant porphyry Cu deposits (PCDs); however, their mineralogical and geochemical nature remain elusive.
Guangxu Li +5 more
wiley +1 more source
Ediacara Obscura: Unveiling Hidden Magnetisations in the Fen Complex, Southern Norway
Geochemistry, Geophysics, Geosystems, Volume 27, Issue 5, May 2026.Abstract Paleomagnetic directions found in Ediacaran (635–539 Ma) rocks are widely dispersed, which has led to conflicting hypotheses about tectonic regimes and geomagnetic field behavior during this period, and raised doubts about the fidelity of the paleomagnetic record.
Justin A. D. Tonti‐Filippini +8 more
wiley +1 more source
U-Pb geochronology of the El Jadida rhyolite and relation to possible Lower Cambrian recycling (Coastal block, Moroccan Meseta). [PDF]
, 2018 The El Jadida (Mazagan) dome, whose existence was reported as early as 1934 by Yovanovitch and Freys, constitutes one of the first outcrops of the Moroccan Meseta where the Precambrian (PIII?)-Paleozoic (Lower Cambrian?) boundary was established (Gigout,
El Attari, A. +8 more
core
Geochemistry, Geophysics, Geosystems, Volume 27, Issue 5, May 2026.Abstract Granitoid magmatism along the western Pacific margin records interactions between subduction dynamics and crust–mantle processes; however, the links between plate reorganization and magma‐source evolution remain debated. Here we integrate U–Pb zircon geochronology with Pb–Sr–Nd–Hf isotope systematics to investigate Cretaceous–Paleogene ...
Nghiem V. Dao +7 more
wiley +1 more source
The boundary between the Central Asian Orogenic belt and Tethyan tectonic domain deduced from Pb isotopic data [PDF]
, 2015 Castillo, Paterno R +7 more
core +1 more source
Tectonics, Volume 45, Issue 5, May 2026.Abstract The paleomagnetism of Miocene calc‐alkaline volcanics and sediments from Sardinia has firmly showed that the Corsica‐Sardinia microplate rotated 50°–60° counterclockwise (CCW) with respect to Europe between 21 and 15 Ma, during its drift from the Provencal margin. However, Permian to Eocene rocks from central‐south Sardinia revealed higher (up
Gaia Siravo +3 more
wiley +1 more source
Evidence formulti-cycle sedimentation and provenance constraints from [PDF]
, 2016 Laser ablation ICP-MS U–Pb analyses were conducted on detrital zircons of Triassic sandstone and conglomerate from the Lusitanian basin in order to: i) document the age spectra of detrital zircon; ii) compare U–Pb detrital zircon ages with previous ...
Chichorro, Martim +7 more
core
Basin Research, Volume 38, Issue 3, May–June 2026.New U–Pb zircon dating shows the Rewan Group was deposited between ~250 and 233 million years ago and that sedimentation shifted across the basin through time, with earlier deposition in the foredeep and later deposition in the back bulge. Testing multiple dating approaches and grain‐selection strategies improves confidence in these age estimates and ...
Matthew Scipione +6 more
wiley +1 more source
Earthtime Lesson Plan for U/Pb Dating (grade 8-12) [PDF]
The Earthtime Lesson Plan is a complete description of a radiometric dating module taught to high school students at MIT. U/Pd dating and it's uses, teacher background, materials needed, time frame and National Science Standards are all provided as well ...
core
European Journal of Soil Science, Volume 77, Issue 3, May–June 2026.ABSTRACT Deciphering the time milestones of clay formation is crucial for modeling the evolution of major geological systems near the Earth's surface. In the present study, kaolinite samples collected along four vertical profiles within a Gleysol‐Ferralsol‐Podzol soil toposequence near São Gabriel da Cachoeira, NW Amazon Basin (Brazil) are dated using ...
Célia Regina Montes +8 more
wiley +1 more source