Results 21 to 30 of about 166,341 (292)

Timing of the magmatism of the paleo-Pacific border of Gondwana: U-Pb geochronology of Late Paleozoic to Early Mesozoic igneous rocks of the north Chilean Andes between 20° and 31°S [PDF]

, 2014
Indexación: Web of Science; ScieloABSTRACT. U-Pb zircon geochronological data provide record of about 130 Ma of igneous activity in the Andes of northern Chile, which extended episodically from the latest Early Carboniferous to Early Jurassic (328-194 Ma)
Maksaev, Víctor, Munizaga, Francisco, Tassinari, Colombo   +2 more
core   +1 more source

Neoproterozoic subduction along the Ailaoshan zone, South China : geochronological and geochemical evidence from amphibolite [PDF]

, 2014
This study was supported by China Natural Science Foundation (41190073 and 41372198), National Basic Research Program of China (2014CB440901) and Natural Environment Research Council (grant NE/J021822/1).Lenses of amphibolites occur along the Ailaoshan ...
Cai, Yongfeng, Cawood, Peter A., Fan, Weiming, Liu, Huichuan, Wang, Yuejun, Xing, Xiaowan, Zhang, Yuzhi   +6 more
core   +1 more source

Adjustment of small-span masonry arch bridges to present-day demands

Građevinar, 2014
An overview of deterioration mechanisms and damage to masonry arch bridges, methods for inspection of existing structures, and conservative and sophisticated assessment methods, is presented in this paper.
Alex Kindij, Ana Mandić Ivanković, Marin Vasilj   +2 more
doaj   +1 more source

U-Pb geochronology at 100ppm age uncertainty [PDF]

Goldschmidt2021 abstracts, 2021
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Schaltegger, Urs, Greber, Nicolas, Ovtcharova, Maria, Gaynor, Sean, Schoene, Blair, Wotzlaw, Jörn-Frederik, Davies, Joshua, Farina, Federico   +7 more
openaire   +2 more sources

Detrital zircon geochronology of Paleoproterozoic metasedimentary rocks from Jämsä, Central Finland [PDF]

Bulletin of the Geological Society of Finland
In this short communication, we present new detrital single grain zircon U-Pb data for six metasedimentary rock samples from Jämsä, Central Finland.
Perttu Mikkola, Matti Kurhila, Hannu Huhma   +2 more
doaj   +1 more source

NanoSIMS and EPMA dating of lunar zirconolite

Progress in Earth and Planetary Science, 2021
Zirconolite is a common Zr-rich accessary mineral in mafic rocks. It is also an ideal U–Pb/Pb–Pb chronometer because it commonly contains high U content (mostly 0.1–10 wt%) and negligible initial Pb.
Nian Wang, Qian Mao, Ting Zhang, Jialong Hao, Yangting Lin   +4 more
doaj   +1 more source

New monazite U-Pb age constraints on the evolution of the Paleoproterozoic Vaasa granitoid batholith, western Finland [PDF]

, 2016
The Vaasa batholith, western Finland, is a large, peraluminous granitoid pluton that crystallized at 1.88-1.87 Ga during the culmination of the Svecofennian orogeny.
Hölttä, Pentti, Kotilainen, Anna K., Kurhila, Matti, Mänttäri, Irmeli, Rämö, O. Tapani   +4 more
core   +2 more sources

The possible existence of Hs in nature from a geochemical point of view [PDF]

, 2006
A hypothesis of the existence of a long-lived isotope 271Hs in natural molybdenites and osmirides is considered from a geochemical point of view. It is shown that the presence of Hs in these minerals can be explained only by making an additional ad hoc ...
A. D. Brandon, A. D. Smith, A. Meibom, A. Meibom, A. Narinov, A. Sobiczewski, A. V. Ivanov, A. V. Ivanov, Ch. E. Düllmann, D. L. Anderson, D. Selby, G. R. Foulger, G. Royer, H. J. Stein, H. J. Stein, H. Meier, J. G. Raith, J. M. Bird, J. Morris, J. P. Davidson, J. V. Kratz, K. A. Petrzhak, R. D. Cherry, R. Eichler, R. Gentry, R. J. Walker, R. J. Walker, S. Hofmann, S. V. Balyshev, T. V. Galashvili, V. P. Perelygin, W. M. White, Yu. Oganessian   +32 more
core   +2 more sources

Navigating the complexity of detrital rutile provenance: methodological insights from the Neotethys Orogen in Anatolia [PDF]

Geochronology
Sedimentary provenance is a powerful tool for reconstructing convergent margin evolution. However, single mineral approaches, like detrital zircon, have struggled to track sediment input from mafic and metamorphic sources.
M. A. Mueller, M. A. Mueller, M. A. Mueller, A. Licht, A. Licht, A. Möller, C. B. Condit, J. C. Fosdick, F. Ocakoğlu, C. Campbell   +9 more
doaj   +1 more source

Effect of Gas Flow Rates in Laser Ablation System on Accuracy and Precision of Zircon U-Pb Dating Analysis by LA-ICP-MS

Yankuang ceshi, 2022
BACKGROUND Despite zircon U-Pb dating analysis by LA-ICP-MS receiving wide acceptance, it remains a challenge to obtain results with high accuracy and precision.
TAN Xijuan, GUO Chao, FENG Yonggang, ZHOU Yi, LIANG Ting   +4 more
doaj   +1 more source