Results 31 to 40 of about 156,667 (215)

U–Th whole rock data and high spatial resolution U–Th disequilibrium and U–Pb zircon ages of Mt. Erciyes and Mt. Hasan Quaternary stratovolcanic complexes (Central Anatolia)

Data in Brief, 2020
Thirty-eight lava and pyroclastic samples were collected from Mt. Erciyes and Mt. Hasan, the two largest stratovolcanic complexes of the Central Anatolian Volcanic Province in Turkey.
Bjarne Friedrichs, Axel K. Schmitt, Lucy McGee, Simon Turner   +3 more
doaj   +1 more source

Crustal evolution of the western part of the Archean Gavião Block, São Francisco Craton, based on U-Pb, Sm-Nd and Rb-Sr evidence [PDF]

Geologia USP. Série Científica, 2013
The western part of the Gavião Block (São Francisco Craton) is one of the oldest fragments of the South American Platform. It comprises the Riacho de Santana Gneissic Migmatitic complex, the Santa Isabel complex and the Riacho de Santana greenstone belt.
Natali da Silva Barbosa, Wilson Teixeira, Luiz Rogério Bastos Leal, Angela Beatriz de Menezes Leal   +3 more
doaj   +1 more source

Geodynamic seawater-sediment porewater evolution of the east central Atlantic Paleogene ocean margin revealed by U-Pb dating of sedimentary phosphates

Frontiers in Earth Science, 2022
Emerging evidence suggests that U-Pb and Lu-Hf ages of sedimentary apatite group minerals are often younger than their biostratigraphic ages. However, U-Pb dating of exquisitely preserved carbonate fluorapatite (CFA) is rare.
Jérémie Aubineau, Fleurice Parat, Ernest Chi Fru, Radouan El Bamiki, Olivia Mauguin, Fabien Baron, Marc Poujol, Michel Séranne   +7 more
doaj   +1 more source

U–Pb ages of angrites

Geochimica et Cosmochimica Acta, 2008
Abstract Precise U–Pb ages, determined with double spike ( 202 Pb– 205 Pb) thermal ionization m1ass spectrometry, are reported for angrites Angra dos Reis (AdoR), Lewis Cliff 86010 (LEW), and D’Orbigny. Nineteen of 23 acid-washed pyroxene fractions from these meteorites and whole rock fractions from D’Orbigny contain between 0.5 and 1.3 pg of total ...
openaire   +2 more sources

Precise U-Pb zircon ages and geochemistry of Jurassic granites, Ellsworth-Whitmore terrane, central Antarctica [PDF]

, 2016
The Ellsworth-Whitmore Mountain terrane of central Antarctica was part of the early Paleozoic amalgamation of Gondwana, including a 13,000 m section of Cambrian–Permian sediments in the Ellsworth Mountains deposited on Grenville-age crust.
Craddock, John P., Crowley, James L., Juda, Natalie, Konstantinou, Alexandros, Larocque, Jeremiah, Pankhurst, Robert J., Schmitz, Mark D., Storey, Bryan   +7 more
core   +1 more source

Dating the Orosirian orogen-parallel shear zones in the western Khondalite Belt, North China Craton: new constraints from monazite, titanite and apatite U-Pb ages

Frontiers in Earth Science
A series of NE-to E-trending ductile shear zones are widely distributed in the Khondalite Belt, a Paleoproterozoic collisional orogen in the North China Craton.
Hengzhong Qiao, Miao Liu, Chencheng Dai, Shangjing Wu   +3 more
doaj   +1 more source

Early Cenozoic drainage evolution in the Jianghan Basin: Constraints from detrital zircon U-Pb ages of surface rivers and cores in the basin

地质科技通报, 2023
Objective The evolution of large rivers is closely linked to the interactions between tectonic and climatic processes. Understanding the evolutionary history of these rivers is crucial for uncovering the influence of deep dynamic processes on the Earth's
Yang Zhang, Xiaokang Chen, Xu Lin, Chang'an Li, Haijin Liu, Jie Liu   +5 more
doaj   +1 more source

In-situ phosphate U-Pb ages of the L chondrites

Geochimica et Cosmochimica Acta, 2023
The thermal history of asteroids is recorded by the radioisotopic ages of meteorites that derive from them. Radioisotopic ages may date a number of events, such as the cooling of a parent body during waning radiogenic metamorphism, rapid cooling experienced upon parent body break-up, and/or subsequent collision-induced reheating of material.
Craig Robert Walton, Heejin Jeon, Ana Černok, Auriol S.P. Rae, Ioannis Baziotis, Fengzai Tang, Venkata S.C. Kuppili, Ludovic Ferrière, James Darling, Sen Hu, Martin J. Whitehouse, Mahesh Anand, Oliver Shorttle   +12 more
openaire   +2 more sources

Geologic history of Martian regolith breccia Northwest Africa 7034: Evidence for hydrothermal activity and lithologic diversity in the Martian crust [PDF]

, 2016
The timing and mode of deposition for Martian regolith breccia Northwest Africa (NWA) 7034 were determined by combining petrography, shape analysis, and thermochronology.
Adcock, Agee, Andersen, Aström, Bacon, Bagnold, Beck, Bellucci, Bibring, Bibring, Bish, Blake, Blott, Borg, Bradley, Brandon, Cannon, Carr, Cartwright, Chipera, Christensen, Claoué-Long, Collinet, Cooney, Dahl, Day, Domokos, Domokos, Downs, Dreibus, Dyar, Ehlmann, Ehlmann, Farley, Filiberto, Filiberto, Filiberto, Filiberto, Foland, Friedman, Gattacceca, Gellert, Gellert, Goderis, Golden, Greeley, Greenwood, Grimes, Grotzinger, Hartmann, Haskin, Heaman, Herd, Hiess, Hiess, Humayun, Hurowitz, Jerolmack, Jutzeler, Kaminski, Kekäläinen, Keller, Klingelhofer, Lee, Leroux, Liu, Lorand, Ludwig, Ludwig, Malin, Manga, Mattinson, McCanta, McCubbin, McCubbin, McCubbin, McCubbin, McCubbin, McEwen, McKay, McLennan, McLennan, McLennan, McLennan, McSween, McSween, McSween, McSween, McSween, McSween, Medard, Meldrum, Mezger, Monders, Monkawa, Morris, Morris, Moser, Murchie, Musselwhite, Muttik, Nekvasil, Nekvasil, Nemchin, Nyquist, Nyquist, Papike, Papike, Poulet, Santos, Sarbadhikari, Sautter, Sautter, Schmidt, Schmidt, Schoene, Schon, Sha, Sharp, Shearer, Shearer, Squyres, Squyres, Squyres, Stacey, Steele, Stolper, Szabó, Tartèse, Taylor, Taylor, Taylor, Terada, Terada, Thomson, Tosca, Treiman, Tuff, Udry, Usui, Vaniman, Vaniman, Wadhwa, Walker, Wang, Wang, Wiedenbeck, Wiedenbeck, Williams, Wingate, Wittmann, Yen   +151 more
core   +3 more sources

Zircon U/Pb ages for gniess from Qianshan, Anhui

Chinese 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, Clark Isachsen, Xiachen Zhi, Taxi Zhou, Hou Cheng, Qunke Xia   +5 more
openaire   +1 more source