Results 81 to 90 of about 157,575 (214)

Enhanced diffusion of Uranium and Thorium linked to crystal plasticity in zircon

open access: yesGeochemical Transactions, 2006
The effects of crystal-plasticity on the U-Th-Pb system in zircon is studied by quantitative microstructural and microchemical analysis of a large zircon grain collected from pyroxenite of the Lewisian Complex, Scotland. Electron backscatter diffraction (
Reddy Steven M   +2 more
doaj   +1 more source

Large-number detrital zircon U-Pb ages reveal global cooling caused the formation of the Chinese Loess Plateau during Late Miocene. [PDF]

open access: yesSci Adv, 2022
Zhang H   +10 more
europepmc   +1 more source

U–Pb dating and Sm–Nd isotopic analysis of granitic rocks from the Tiris Complex : new constaints on key events in the evolution of the Reguibat Shield, Mauritania [PDF]

open access: yes, 2012
The Reguibat Shield of N Mauritania and W Algeria represents the northern exposure of the West African Craton. As with its counterpart in equatorial West Africa, the Leo Shield, it comprises a western Archaean Domain and an eastern Palaeoproterozoic ...
Abdouloye, T.B.   +6 more
core   +1 more source

Zircon U/Pb ages for gniess from Qianshan, Anhui

open access: yesChinese Science Bulletin, 2000
Zircon U/Pb ages were measured for Qianshan gneiss at the ultrahigh pressure metamorphic (UHPM) complex in the Southern Dabie Terrain (SDT). According to morphology, Th and U contents of eight fractions of zircon and data distribution on the discordia, it is indicated that they should be treated as metamorphic overgrowth mixing zircons, in which the ...
Daogong Chen   +5 more
openaire   +1 more source

A High-Precision ID-TIMS U-Pb Dating Method of Apatite

open access: yesYankuang ceshi
Apatite belongs to the hexagonal crystal system and has a relatively high (350-550℃) closure temperature, which can accommodate multiple element substitutions into the crystal lattice.
Jiarun TU   +5 more
doaj   +1 more source

Evidence formulti-cycle sedimentation and provenance constraints from [PDF]

open access: yes, 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  

Discussion on Detrital zircon geochronology of the Carboniferous Baixo Alentejo Flysch Group (South Portugal); constraints on the provenance and geodynamic evolution of the South Portuguese Zone, Journal, vol. 172, 294-308 [PDF]

open access: yes, 2015
In their recent study, Rodrigues et al. (2014) attempted a provenance analysis of the Carboniferous Baixo Alentejo Flysch Group (SW Iberia), discussing variability over time in sources of South Portuguese Zone turbidites.
Pereira, M. Francisco
core   +1 more source

LA-ICP-MS U-Pb apatite dating of Lower Cretaceous rocks from teschenite-picrite association in the Silesian Unit (southern Poland)

open access: yesGeologica Carpathica, 2014
The main products of volcanic activity in the teschenite-picrite association (TPA) are shallow, sub-volcanic intrusions, which predominate over extrusive volcanic rocks.
Szopa Krzysztof   +2 more
doaj   +1 more source

U-Pb zircon age of volcaniclastic layers in Middle Triassic platform carbonates of the Austroalpine Silvretta nappe (Switzerland) [PDF]

open access: yes, 2018
We present precise U-Pb age determinations from two volcaniclastic layers within Middle Triassic carbonates in the Upper Austroalpine Silvretta nappe near Davos (Switzerland).
Furrer, Heinz   +3 more
core  

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