Results 181 to 190 of about 5,022,556 (217)

Age of Aswan monumental granite, Egypt by U/Pb dating of zircon

Precambrian Research, 1978
The basement rocks of Aswan, Egypt, are among the best studied in the country. Its monumental granite has been dated by various techniques. Here, several suites of zircon separated from the monumental granite have been dated by the U–Pb method. A slight discordance is observed between U 238 /Pb 206 and U 235 /Pb 207 ages, and an average ages of 565 ...
A.A. Abdel-Monem, P.M. Hurley
openaire   +1 more source

Precise U–Pb zircon dates from the Avalon Terrane in Newfoundland

Canadian Journal of Earth Sciences, 1988
The following new U–Pb dates are provided for zircons from volcanic and intrusive rocks of the Avalon Terrane of Newfoundland: Burin Group ophiolite (Wandsworth pegmatitic gabbro), [Formula: see text]; Marystown Group ash-flow tuff, [Formula: see text]; Rock Harbour Group rhyolite clast in conglomerate, [Formula: see text]; Harbour Main Group ash-flow
T. E. Krogh, D. F. Strong, S. J. O'Brien, V. S. Papezik   +3 more
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Age and Timing of the Permian Mass Extinctions: U/Pb Dating of Closed-System Zircons

Science, 2004
The age and timing of the Permian-Triassic mass extinction have been difficult to determine because zircon populations from the type sections are typically affected by pervasive lead loss and contamination by indistinguishable older xenocrysts. Zircons from nine ash beds within the Shangsi and Meishan sections (China), pretreated by annealing followed ...
Roland, Mundil, Kenneth R, Ludwig, Ian, Metcalfe, Paul R, Renne   +3 more
openaire   +2 more sources

U-Pb Zircon Dating of Regional Deformation in the Lower Crust of the Kohistan Arc

International Geology Review, 2005
Felsic veins several cm thick to bodies several hundreds of m wide are sporadically distributed in the Kamila amphibolites of the Kohistan arc sequence. Some small dikes (less than one m thick) were deformed together with ductile deformation of wall-rock amphibolites; other small undeformed dikes crosscut foliation in the amphibolites.
Hiroshi Yamamoto, Katsura Kobayashi, Eizo Nakamura, Yoshiyuki Kaneko, Allah Bakhsh Kausar   +4 more
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SHRIMP U-Pb zircon dating on the metamorphism of the Zanhuang Complex

2011
Abstract
Xiao, LL, Guo, J, Wu, C, Wan, YS, Li, XH
openaire   +1 more source

U/PB dating of phanerozoic zircon

International Journal of Radiation Applications and Instrumentation. Part D. Nuclear Tracks and Radiation Measurements, 1990
H. Baadsgaard, P. Cavell
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Progress on Zircon U‐Pb Dating Technique

Acta Geologica Sinica - English Edition, 2014
Shuguang HUANG, Wenjiang ZHOU, Xin HAN, Zhihui TENG   +3 more
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Conventional and SHRIMP U-Pb Zircon Dating of the Chor Granitoid, Himachal Himalaya

Journal of the Geological Society of India, 2003
Abstract Conventional zircon U-Pb analyses of optically clear multi-grain fractions from the Chor Granitoid sample - CH 174 provide a complex pattern with eight points yielding a reference line with an upper intercept age of c. 910 Ma and large scatter. Three zircon fractions from the more deformed sample CH 4/11 of this body define a
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Effect of chemical composition on zircon radiation damage dating: Implications for low-temperature thermochronology

Geoscience Frontiers, 2023
Santosh M, Yunpeng Dong, Shengsi Sun
exaly  

The Review of Zircon Genesis Mineralogy and U-Pb Isotope Dating

Advances in Geosciences, 2022
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