Results 211 to 220 of about 21,763 (249)

Provenance of Carboniferous sandstones from U–Pb dating of detrital zircons

Nature, 1987
One of the major problems of North Atlantic palaeogeographical development is the origin and source of the drainage system that deposited, during the Carboniferous, up to 5 km of clastic sediments across an east–west belt from western Ireland to western Poland. We present here results from U–Pb dating of detrital zircons In Namurian (mid-Carboniferous)
Sarah Drewery, R. A. Cliff, M. R. Leeder
openaire   +1 more source

U–Pb zircon dating of the Hoting gabbro, north central Sweden

GFF, 2003
Abstract The Hoting gabbro, located in the northern part of Jamtland County, is one of the largest layered mafic intrusions in Sweden. The rounded, main part of the intrusion has the shape of a funnel, in which the magmatic layering is concentrically developed with steeply dipping outer layers, and flat layering in the central part.
Fredrik A. Hellström, Sven Åke Larson
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
openaire   +1 more source

U-Pb SHRIMP dating of zircons from metamorphic complexes in eastern Kamchatka

Russian Journal of Pacific Geology, 2012
The metamorphic complexes of eastern Kamchatka exposed on the Khavyven Highland and Karaginsky Island, as well as on the Kamchatka and Ozernoi peninsulas, compose large (up to 1.5 km) elongated blocks spatially associated with ophiolitic peridotite and gabbroic rock bodies (the Khavyven Highland and Karaginsky Island) or make up isolated fragments and ...
I. A. Tararin, Z. G. Badredinov, B. A. Markovsky, B. I. Slyadnev   +3 more
openaire   +1 more source

Age constraint on Burmese amber based on U–Pb dating of zircons

Cretaceous Research, 2012
Amber from northern Myanmar has been commercially exploited for millennia, and it also preserves the most diverse palaeobiota among the worlds' seven major deposits of Cretaceous amber. Recent estimated ages vary from Albian to Cenomanian, based on palynology, an ammonoid, and Mesozoic insect taxa preserved within the amber. The burmite-bearing rock is
Guanghai Shi, David A. Grimaldi, George E. Harlow, Jing Wang, Jun Wang, Mengchu Yang, Weiyan Lei, Qiuli Li, Xianhua Li   +8 more
openaire   +1 more source

U–Pb dating of stockwork zircons from the eastern Iberian Pyrite Belt

Journal of the Geological Society, 1999
Zircons found in the stockwork zones of the massive sulphide Los Frailes deposit, Iberian Pyrite Belt, are interpreted to have grown during the hydro-thermal alteration of host felsic volcanic rocks. Ion microprobe (SHRIMP) dating gives a 206 Pb/ 238 U age of 345.7 ± 4.6 Ma (2σ) and together ...
Nesbitt, R.W., Pascual, E., Fanning, C.M., Toscano, M., Saez, R., Almodovar, G.R.   +5 more
openaire   +2 more sources

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

U-Pb Zircon Dates of Morin Anorthosite Suite Rocks, Grenville Province, Quebec

The Journal of Geology, 1991
U-Pb zircon ages of samples of anorthosite, pyroxene monzodiorite (jotunite), and pyroxene quartz monzonite (quartz mangerite) of the Morin anorthosite complex, Grenville Province, Quebec, are 1155 {plus minus} 3, 1146 {plus minus} 4 and 1135 {plus minus} 3 Ma, respectively.
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
openaire   +1 more source

Progress on Zircon U‐Pb Dating Technique

Acta Geologica Sinica - English Edition, 2014
Shuguang HUANG, Wenjiang ZHOU, Xin HAN, Zhihui TENG   +3 more
openaire   +1 more source