Results 231 to 240 of about 2,657,206 (280)

Decoupling of Neogene seawater lithium isotopes from uplift-driven weathering. [PDF]

Nat Commun
Yang Y, Liu Y, Pogge von Strandmann PAE, Jin Z, Galy A, Ye C, Weldeghebriel MF, Yan Z, He J, Gou LF, Deng L, Zhang W, Koutsodendris A, Pross J, Fang X.   +14 more
europepmc   +1 more source

Evolution of Southern Hemisphere Westerly asymmetry since the Early Miocene. [PDF]

Sci Adv
Gai C, Struve T, Roberts AP, Li Y, Zhu C, Chen Y, Wei J, Liu W, Zhang W, Liu H, Wu H, Liu Q.   +11 more
europepmc   +1 more source

Inefficient melt mixing below a fast-spreading ridge revealed by Hess Deep lower gabbros (ODP Leg 147 and IODP Expedition 345). [PDF]

Sci Adv
Basch V, Sanfilippo A, Genske F, Böhnke M, Zanetti A, Stracke A.   +5 more
europepmc   +1 more source

New geochemical and Sr-Nd-Hf isotopic constraints on the genesis of kimberlites and ultramafic lamprophyres from the Adelaide Fold Belt and Gawler Craton, South Australia. [PDF]

Mineral Petrol
Dalton H, Giuliani A, Fitzpayne A, Peters BJ.   +3 more
europepmc   +1 more source

High-energy impact and vapor recondensation history of the angrite parent body revealed by nickel isotopes. [PDF]

Proc Natl Acad Sci U S A
Zhu K, Yamaguchi A, Sossi PA, Bouvier A, Chen L, Ni P.   +5 more
europepmc   +1 more source

The Hf isotope composition of global seawater and the evolution of Hf isotopes in the deep Pacific Ocean from Fe-Mn crusts

Chemical Geology, 2001
This paper presents a revised chemical purification method of Hf for the measurement of Hf isotope ratios of Fe–Mn crusts on a new generation of double focusing multiple collector plasma source mass spectrometer (MC-ICP-MS). By measuring surface scrapings of hydrogenetic Fe–Mn crusts distributed over the three major ocean basins, the present-day Hf ...
K David, M Frank, R.K O'Nions, N.S Belshaw, J.W Arden   +4 more
core   +4 more sources

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
core   +3 more sources

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The Hf isotopic composition of zircon reference material 91500

Chemical Geology, 2008
Abstract Ten new single zircon fragments, analyzed by solution chemistry and MC-ICP-MS, of the 91500 zircon standard show no evidence to support a recent claim based on in situ data that this reference material is heterogeneous in terms of its radiogenic Hf isotope composition and as a consequence should be abandoned as a reliable interlaboratory ...
Blichert-Toft, Janne, Albarède, Francis
openaire   +3 more sources

Hf isotope compositions of komatiites

Earth and Planetary Science Letters, 1999
Abstract Many of the oldest ∼3.5 Ga komatiites have low Al2O3/TiO2 and depleted HREE, features that are attributed to garnet fractionation at some stage during their formation. It is not known, however, whether this fractionation took place at the time of melting, or well before, perhaps during the crystallization of an early magma ocean.
Janne Blichert-Toft, Nicholas T. Arndt
openaire   +1 more source

The anatectic effect on the zircon Hf isotope composition of migmatites and associated granites

Lithos, 2015
Zircon Hf isotope composition is widely used to trace the growth and evolution of continental crust. However, it is controversial whether the Hf isotope composition of magmatic zircons can faithfully reflect that of their sources, especially for S-type granites.
Yi-Xiang Chen, Peng Gao, Yong-Fei Zheng
openaire   +1 more source