Results 31 to 40 of about 148,265 (366)

Electrostatic force: A novel method for mounting small zircon grains to expose the maximum outer surface

Solid Earth Sciences, 2020
Mirco-beam isotopic analyses of zircon have increased dramatically with applications for providing multi-isotopic information. As small as 2–5 μm spot size could be used by secondary ion mass spectrometry for in-situ isotope analysis of zircon with high ...
Xiao-Xiao Ling, Hong-Xia Ma, Yu Liu, Qiu-Li Li   +3 more
doaj   +1 more source

U–Pb zircon ages of the host rocks of the Juomasuo Au–Co–Cu deposit, northeastern Finland [PDF]

Bulletin of the Geological Society of Finland, 2017
The Salittu Formation is one of the few metavolcanic successions in the U-Pb zircon single grain dating using the LA-MC-ICP-MS technique was utilized to determine the age of the host rocks of the Juomasuo Au-Co-Cu deposit located in the late Archean ...
P. Nikkola, I. Mänttäri, O.T. Rämö
doaj   +1 more source

Detrital zircon U–Pb geochronology and geochemistry of the Riachuelos and Palma Sola beach sediments, Veracruz State, Gulf of Mexico: a new insight on palaeoenvironment

Journal of Palaeogeography, 2020
Zircons are abundant in the beach sediments. In this study, surface microtexture, mineralogy, bulk sediment geochemistry, trace element composition and U–Pb isotopic geochronology of detrital zircons collected from the Riachuelos and Palma Sola beach ...
J. Armstrong-Altrin
semanticscholar   +1 more source

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   +2 more sources

Microtexture and U–Pb geochronology of detrital zircon grains in the Chachalacas beach, Veracruz State, Gulf of Mexico

Geological Journal, 2020
Microtextures, trace element concentrations, and U–Pb geochronology of detrital zircon grains recovered from the Chachalacas beach in the western Gulf of Mexico were investigated to infer palaeoenvironmental conditions.
J. Armstrong-Altrin, Mayla A. Ramos‐Vázquez, Nadia Y. Hermenegildo‐Ruiz, J. Madhavaraju   +3 more
semanticscholar   +1 more source

Experimental evidence for the preservation of U-Pb isotope ratios in mantle-recycled crustal zircon grains

Scientific Reports, 2018
Zircon of crustal origin found in mantle-derived rocks is of great interest because of the information it may provide about crust recycling and mantle dynamics.
Fernando Bea, Pilar Montero, Jose Francisco Molina Palma   +2 more
doaj   +1 more source

Magmatic record of India-Asia collision [PDF]

, 2015
This work was financially co-supported by Chinese Academy of Sciences (XDB03010301) and other Chinese funding agencies (Project 973: 2011CB403102 and 2015CB452604; NSFC projects: 41225006, 41273044, and 41472061).New geochronological and geochemical data
Cawood, Peter Anthony, Chung, Sun-Lin, Liu, Sheng-Ao, Mo, Xuan-Xue, Niu, Yaoling, Wang, Qing, Wu, Fu-Yuan, Zhao, Zhi-Dan, Zhu, Di-Cheng   +8 more
core   +1 more source

The Medicine Hat Block and the Early Paleoproterozoic Assembly of Western Laurentia

Geosciences, 2020
The accretion of the Wyoming, Hearne, and Superior Provinces to form the Archean core of western Laurentia occurred rapidly in the Paleoproterozoic. Missing from Hoffman’s (1988) original rapid aggregation model was the Medicine Hat block (MHB).
Jennifer N. Gifford, Shawn J. Malone, Paul A. Mueller   +2 more
doaj   +1 more source

Early Cambrian U-Pb zircon age and Hf-isotope data from the Guasayán pluton, Sierras Pampeanas, Argentina: implications for the northwestern boundary of the Pampean arc [PDF]

, 2016
An Early Cambrian pluton, known as the Guasayán pluton, has been identified in the central area of Sierra de Guasayán, northwestern Argentina. A U?Pb zircon Concordia age of 533 ± 4 Ma was obtained by LA-MC-ICP-MS and represents the first report of ...
Alasino, Pablo Horacio, Baldo, Edgardo Gaspar Agustín, Basei, Miguel A. S., da Costa Campos Neto, Mario, Dahlquist, Juan Andrés, Rapela, Carlos Washington, Uran, Gimena Mariel, Verdecchia, Sebastián Osvaldo, Zandomeni, Priscila Soledad   +8 more
core   +2 more sources

Paramagnetic hole centres in natural zircon and zircon colouration

European Journal of Mineralogy, 2012
Paramagnetic defect centres and their relation to variable types of colouration were studied for eleven natural zircon crystals from three localities in North Carolina (USA), Massif Central (France), and Ural Mountains (Russia) using electron paramagnetic resonance (EPR) and optical absorption spectroscopy.
Andreas Pöppl, Rolf Böttcher, Michael Trinkler, Mathias Klinger, Ulf Kempe   +4 more
openaire   +2 more sources