Results 151 to 160 of about 516 (186)
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Trace elements and the behaviour of the U-Pb system in inherited and newly formed zircons
Contributions to Mineralogy and Petrology, 1974The distribution of U, Y, P, and Ca was studied with an electron microprobe in detrital zircons from paragneisses of amphibolite to granulite facies as well as in zircons formed in their present-day host rocks, such as a granite, anatectic and aplitic gneisses and a migmatite from the Southern Alps.
Sommerauer, J., Köppel, V.
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From richer to poorer: zircon inheritance in Pomona Island Granite, New Zealand
Contributions to Mineralogy and Petrology, 2010Previous U–Pb zircon dating of the Pomona Island Granite (PIG) pluton (South Island, New Zealand) yielded either Permo-Carboniferous or Late Jurassic ages for five samples essentially indistinguishable in their field, petrographic, and geochemical characteristics. Detailed cathodoluminescence imaging and LA-ICP-MS dating of zircon in new and previously
J. M. Scott +5 more
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Precambrian Research, 2015
Predictions of large volumes of stabilized continental crust by the early Archaean stand in stark contrast to the actual amount of pre-3.5 Ga rocks presently exposed on Earth's surface. The Pilbara Craton of Western Australia, one of the best preserved Paleoarchean crustal blocks on Earth, is believed to have developed on a cryptic, possibly ≥3.8 Ga ...
Kemp, A. +3 more
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Predictions of large volumes of stabilized continental crust by the early Archaean stand in stark contrast to the actual amount of pre-3.5 Ga rocks presently exposed on Earth's surface. The Pilbara Craton of Western Australia, one of the best preserved Paleoarchean crustal blocks on Earth, is believed to have developed on a cryptic, possibly ≥3.8 Ga ...
Kemp, A. +3 more
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Geological Society of America Bulletin, 2012
Knowledge of the Precambrian history and crustal architecture of western North America is limited by the restricted extent of outcropping basement due to Phanerozoic sedimentary cover and magmatic disruption. Inherited zircon components in the magmatic rocks of the Idaho batholith provide a window into this largely obscured crust and are used here to ...
Richard M. Gaschnig +3 more
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Knowledge of the Precambrian history and crustal architecture of western North America is limited by the restricted extent of outcropping basement due to Phanerozoic sedimentary cover and magmatic disruption. Inherited zircon components in the magmatic rocks of the Idaho batholith provide a window into this largely obscured crust and are used here to ...
Richard M. Gaschnig +3 more
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Earth and Environmental Science Transactions of the Royal Society of Edinburgh, 1992
ABSTRACTUsing the ion microprobe SHRIMP we have analysed zircons from the Ben Vuirich, Glen Kyllachy, Inchbae and Vagastie Bridge granites from the Scottish Caledonides, in an attempt to resolve the ages of inherited zircons shown to be present in these granites by previous conventional multigrain analyses.
R. T. Pidgeon, W. Compston
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ABSTRACTUsing the ion microprobe SHRIMP we have analysed zircons from the Ben Vuirich, Glen Kyllachy, Inchbae and Vagastie Bridge granites from the Scottish Caledonides, in an attempt to resolve the ages of inherited zircons shown to be present in these granites by previous conventional multigrain analyses.
R. T. Pidgeon, W. Compston
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Geological Society of America Bulletin, 1977
Zircon dates from metavolcanic and metaplutonic rocks of the central Appalachian Piedmont in Maryland and Virginia are important for interpreting the age of the Glenarm Series. Compilation and evaluation of available data from this area suggest that Piedmont zircons may have inherited a component of older radiogenic lead in seed crystals, which were ...
MICHAEL W. HIGGINS +3 more
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Zircon dates from metavolcanic and metaplutonic rocks of the central Appalachian Piedmont in Maryland and Virginia are important for interpreting the age of the Glenarm Series. Compilation and evaluation of available data from this area suggest that Piedmont zircons may have inherited a component of older radiogenic lead in seed crystals, which were ...
MICHAEL W. HIGGINS +3 more
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Gondwana Research, 2014
Abstract The Simao block, which is the northern extension of the Indochina block, and the Yangtze block were amalgamated by the closure of a Paleo-Tethys branch ocean commonly referred to as the Ailaoshan ocean. The exact location of the suture between these two continental blocks has been contested.
Qingfei Wang +5 more
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Abstract The Simao block, which is the northern extension of the Indochina block, and the Yangtze block were amalgamated by the closure of a Paleo-Tethys branch ocean commonly referred to as the Ailaoshan ocean. The exact location of the suture between these two continental blocks has been contested.
Qingfei Wang +5 more
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Geological Magazine, 2014
AbstractThe Central Asian Orogenic Belt is an accretionary orogen with many distinct terranes including the Chinese Central Tianshan, whose Precambrian tectonic affinity is not yet clearly known. We present Precambrian age spectra of inherited/xenocrystic zircons from magmatic rocks in the Chinese Central Tianshan, collected from published papers.
XUXUAN MA +3 more
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AbstractThe Central Asian Orogenic Belt is an accretionary orogen with many distinct terranes including the Chinese Central Tianshan, whose Precambrian tectonic affinity is not yet clearly known. We present Precambrian age spectra of inherited/xenocrystic zircons from magmatic rocks in the Chinese Central Tianshan, collected from published papers.
XUXUAN MA +3 more
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Zircons: Age, Thermobarometry, and Source Inheritance
2021Dustin Trail +2 more
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Journal of Geophysical Research: Solid Earth, 1990
Ion microprobe U‐Th‐Pb dating zircons from four mafic inclusions from the Palaeozoic granites of the Glenbog and Blue Gum suites, Bega Batholith, shows that while most of the zircons are probably magmatic, the cores of some are premagmatic. The mean 206Pb/238U ages of the magmatic zircons are 412±3 Ma and 414±2 Ma for two inclusions from the Glenbog ...
Y. D. Chen, I. S. Williams
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Ion microprobe U‐Th‐Pb dating zircons from four mafic inclusions from the Palaeozoic granites of the Glenbog and Blue Gum suites, Bega Batholith, shows that while most of the zircons are probably magmatic, the cores of some are premagmatic. The mean 206Pb/238U ages of the magmatic zircons are 412±3 Ma and 414±2 Ma for two inclusions from the Glenbog ...
Y. D. Chen, I. S. Williams
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