Results 131 to 140 of about 4,715 (162)

Corrigendum to “The Hf isotope composition of global seawater and the evolution of Hf isotopes in the deep Pacific Ocean from Fe–Mn crusts” [Chem. Geol. 178 (2001) 23–42]

Chemical Geology, 2002
0009-2541/02/$ see front matter D 2002 Elsevier Science B.V. All rights reserved. PII: S0009 -2541 (02 )00012 -8 $ PII of original article S0009-2541(00)00427-7. * Corresponding author. Present address: Laboratoire Magmas et Volcans, CNRS-UMR 6524, Universite Blaise Pascal, 5 rue Kessler, 63038 Clermont-Ferrand, France. Fax: +33-473-346-744.
K. David, M. Frank, R.K. O'Nions, N.S. Belshaw, J.W. Arden, J.R. Hein   +5 more
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Hf isotope compositions of U.S: Geological Survey reference materials. Geochemistry [PDF]

, 2007
info:eu-repo/semantics ...
Weis, Dominique, Kieffer, Brigitte L, Kieffer, Bruno, Hanano, Diane, Nobre Silva, Ines, Pretorius, Wilma, Maerschalk, Claude Michel, Mattielli, Nadine, Scoates, James   +8 more
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Geochronology, geochemistry, Hf isotopic compositions and formation mechanism of radial mafic dikes in northern Tibet

International Geology Review, 2013
A large mafic dike swarm is radially distributed in southern Qiangtang. Three typical samples were selected for geochronology, geochemistry, and Hf isotopic analysis. Zircon U–Pb dating indicates that the three dikes formed at 291 ± 2, 292 ± 3, and 300 ± 2 Ma.
Ming Wang, Cai Li, Yan-Wang Wu, Chao-Ming Xie   +3 more
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The Hf isotope composition of cratonic mantle: LAM-MC-ICPMS analysis of zircon megacrysts in kimberlites

Geochimica et Cosmochimica Acta, 2000
Zircon megacrysts represent a late stage in the crystallisation of the magmas that produced the low-Cr megacryst suite (Ol1Opx1Cpx1Gnt1Ilm1Phl1Zir) found in many kimberlites, and may carry information on the sources of the parent magmas and the interaction of these magmas with the cratonic lithosphere.
W.L. Griffin, N.J. Pearson, E. Belousova, S.E. Jackson, E. van Achterbergh, Suzanne Y. O’Reilly, S.R. Shee   +6 more
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Hf isotopic composition and age constraints on the evolution of the Archean central Uchi Subprovince, Ontario, Canada

Precambrian Research, 1996
The Archean Uchi Subprovince, located in the northwestern Superior Province, comprises greenstone belts and granitoid complexes that formed in the course of a multistage history between about 3000 and 2690 Ma. The earliest volcanic-plutonic complexes were assembled into a microcontinent, which then progressively grew by the addition of magmatic arcs ...
F. Corfu, G.M. Stott
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Zircon U–Pb geochronology and Hf isotopic compositions of the Mesozoic granites in southern Anhui Province, China

Lithos, 2012
Abstract Mesozoic magmatism is extensively developed in eastern China along the eastern Asian continental margin, but the geochronological framework is not well understood for each area. In this study, seventy-eight samples were collected from the Mesozoic igneous rocks in south Anhui Province, east-central China, in order to precisely constrain ...
Fu-Yuan Wu, Wei-Qiang Ji, Da-Hai Sun, Yue-Heng Yang, Xian-Hua Li   +4 more
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The origin of highly radiogenic Hf isotope compositions in 3.33 Ga Commondale komatiite lavas (South Africa)

Chemical Geology, 2017
Abstract Drill core samples from the 3.33 Ga high-alumina-type Commondale komatiites from the southern Kaapvaal craton (South Africa) were analysed for major, trace elements and Hf- isotope compositions in order to place possible constraints on their mantle sources and the process and timing of mantle depletion.
J. Elis Hoffmann, Allan H. Wilson
openaire   +1 more source

Tracing the origin of Southwest Japan using the Hf isotopic composition of detrital zircons from the Akiyoshi Belt

Terra Nova, 2018
AbstractThe Permian Akiyoshi Belt, which is the oldest unmetamorphosed accretionary complex in Southwest Japan, plays an important role in understanding the origin of the Japanese Islands; however, its tectonic affinity is still not well constrained.
Xiaojing Zhang, Makoto Takeuchi, Hao‐Yang Lee   +2 more
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The Lu-Hf isotope composition of cratonic lithosphere: disequilibrium between garnet and clinopyroxene in kimberlite xenoliths

Geochimica et Cosmochimica Acta, 2002
12th Annual V.M. Goldschmidt Conference Davos Switzerland, The Lu-Hf isotope composition of cratonic lithosphere: disequilibrium between garnet and clinopyroxene in kimberlite xenoliths(DTM, Carnegie Institution of Washington), Pearson, D.G. (University of Durham)
Simon, N.S.C., Carlson, R.W., Pearson, D.G., Davies, G.R.   +3 more
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U–Pb ages and Hf isotope composition of zircons in a metasomatic xenolith (Hyblean Plateau, SE Sicily)

2005
Morphological and trace element studies of a hundred and twenty-one zircon grains separated from a chlorite–alkali feldspar xenolith of metasomatic origin collected from Valle Guffari (Hyblean Plateau, south-eastern Sicily, Italy) indicated the coexistence of igneous and hydrothermal zircons within the same sample.
SAPIENZA G, GRIFFIN W. L, O'REILLY S. Y, MORTEN L, SCRIBANO, Vittorio   +4 more
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