Results 61 to 70 of about 1,306 (162)

From ID-TIMS U-Pb dating of single monazite grain to APT-nanogeochronology: application to the UHT granulites of Andriamena (North-Central Madagascar)

BSGF - Earth Sciences Bulletin
The causes of U-Pb isotopic discordance documented by Paquette et al. (2004) in monazite grains from the ultra-high temperature (UHT) granulite of the Andriamena unit of Madagascar are re-evaluated in the light of nanoscale crystal-chemical ...
Turuani M.J., Seydoux-Guillaume A.-M., Laurent A.T., Fougerouse D., Harley S.L., Reddy S.M., Goncalves P., Saxey D.W., Michaud J., Montel J.-M., Nicollet C., Paquette J.-L.   +11 more
doaj   +1 more source

Is there a Grenvillian basement in the Guerrero-Morelos Platform of Mexico?

Geologica Acta, 2007
In the Guerrero-Morelos platform (Guerrero State, Mexico) the adakitic rocks of Early Tertiary age contain abundant hornblende-rich tonalite xenoliths. Zircon crystals have been concentrated from both adakites and xenoliths, and dated using in-situ U-Pb ...
G. Levresse, J. Tritlla, E. Deloule, P. J. PINTO LINARES   +3 more
doaj   +1 more source

U-Pb dating by zircon dissolution method using chemical abrasion

Anais da Academia Brasileira de Ciências, 2012
Chemical abrasion was carried out on zircons grains of the Temora II standard for U-Pb dating prior to analyses using in situ Laser Ablation-MultiCollector Ion Coupled Plasma Mass Spectrometer (LA-ICPMS) followed by the Isotope Dissolution Thermal ...
Lucy Takehara, Farid Chemale Júnior, Léo A. Hartmann, Ivo A. Dussin, Koji Kawashita   +4 more
doaj   +1 more source

A Database of Low‐Temperature Thermochronology in East Asia

Geoscience Data Journal, Volume 13, Issue 2, April 2026.
Spatial distribution of low‐temperature thermochronology samples in East Asia. ABSTRACT The low closure temperature of the dating system in low‐temperature thermochronology allows shallow crustal movements to be recorded. In recent decades, this approach has been used extensively in studies of orogenic belt exhumation, sedimentary basin evolution, and ...
Chenghao Liu, Shaofeng Liu, Bo Zhang
wiley   +1 more source

Holocene Provenance Identification and Climate Control of Indus Basin By Using Radiogenic Techniques and Clay Mineralogy [PDF]

International Journal of Economic and Environment Geology, 2011
Two commonly used isotopic methods (Zircon U-Pb dating and K-feldspar Pb dating) were employed for the Holocene provenance identification within the Indus basin.
ANWAR ALIZAI
doaj  

Zircon Decomposition in Glass Melting Furnaces: Experimental and Thermodynamic Approaches

International Journal of Applied Ceramic Technology, Volume 23, Issue 2, April 2026.
ABSTRACT The decomposition of zircon (ZrSiO4) refractories by fiberglass compositions at high temperatures (>1300°C) was investigated using the static cup test and two thermodynamic approaches, including an empirical method and calculations performed in FactSage.
Cristian Perez Velasquez, Madhukar Pinreddy, Pierre‐Antoine Dionne, Maziar Montazerian, John C. Mauro   +4 more
wiley   +1 more source

Coesite Discovery in Eclogites Confirms UHP Metamorphism in the Orlica‐Śnieżnik Dome (SW Poland)

Journal of Metamorphic Geology, Volume 44, Issue 3, Page 200-225, April 2026.
ABSTRACT Eclogite lenses are exposed within the orthogneiss‐dominated core of the Orlica‐Śnieżnik Dome in the Sudetes, which forms the northeastern margin of the Bohemian Massif (Variscan Belt of Central Europe). The presence of coesite inclusions in garnet and omphacite confirms that these eclogites underwent ultrahigh‐pressure metamorphism.
Małgorzata Nowak, Lucie Tajčmanová, Marcin Dąbrowski, Iris Buisman, Jacek Szczepański   +4 more
wiley   +1 more source

Exploring the Gravimetric and Geochronological Links in Ancient Terranes of the São Francisco Craton and Borborema Province, NE‐Brazil

Terra Nova, Volume 38, Issue 2, Page 77-86, April 2026.
ABSTRACT Deep crustal fragments and structural lineaments identified through satellite gravity data provide evidence for the extension of the reworked ancient basement of the Central African Block into the northern São Francisco Craton and southern Borborema Province.
Douglas Teixeira Martins, Wagner da Silva Amaral, Felipe Holanda dos Santos, Evilarde Uchôa Filho   +3 more
wiley   +1 more source

Near‐Synchronous Cambrian Evolution of the Transbrasiliano‐Kandi‐4°50′ Shear Zone in South America and Africa

Terra Nova, Volume 38, Issue 2, Page 97-105, April 2026.
ABSTRACT The Transbrasiliano‐Kandi‐4°50′ (TK4) shear zone in western Gondwana crosscuts South America and NW Africa for at least 6000 km. Despite its impressive size, the timing of the main episode of dextral ductile shearing is uncertain. We present detailed in situ multi‐mineral geochronology of mylonites from both Brazil and Algeria supporting that ...
F. A. Caxito, B. V. Ribeiro, F. Alkmim, A. Deramchi, C. L. Kirkland   +4 more
wiley   +1 more source

Long story encrypted in a small grain – zircon from meta-andesite in the Lower Köli Nappes reveals a complex history of the Virisen Arc Terrane, Scandinavian Caledonides, Sweden

Mineralogia
This short report presents the investigation results on the zircon from meta-andesitic rock from the Ankarede Volcanite Formation of the Lower Köli Nappe Complex in Scandinavian Caledonides. Previous U-Pb dating revealed a wide span of dates ranging from
Walczak Katarzyna A., Włodek Adam, Cuthbert Simon, Carter Isabel S. M., Ziemniak Grzegorz   +4 more
doaj   +1 more source