Results 111 to 120 of about 77,130 (271)

Compilation of Sm-Nd isotope analyses of igneous suites, western Churchill Province

, 2010
A compilation has been made of 523 analyses of Sm-Nd isotope ratios of intrusive and extrusive rocks, and presumed orthogneisses, within the western Churchill Province. The data indicate that the region is dominated by juvenile crust extracted from the upper mantle at 2.7-2.8 Ga, emplaced over older crustal domains with extraction ages clustering at 2 ...
T D Peterson, S Pehrsson, T Skulski, H Sandeman   +3 more
openaire   +1 more source

A Comparison of Anorthositic Lunar Lithologies: Variation on the FAN Theme [PDF]

Certain anorthositic rocks that are rare in the returned lunar samples have been identified among lunar meteorites. The variety of anorthosites in the Apollo collection also is more varied than is widely recognized. James eta.
Herzog, G. F., Mittlefehldt, D. W., Nyquist, L. E., Park, J., Peng, Z. X., Shih, C-Y., Shirai, N., Yamaguchi, A.   +7 more
core   +1 more source

Speculations on nature and extent of Archean basement in Labrador as indicated by SR, ND and PB isotopic systematics of proterozoic intrusives [PDF]

The Sm-Nd and Rb-Sr isotopic compositions of mid to late Proterozoic (approximately 1.6 to 1.1 Ga) massif-type anorthosites and mafic intrusives in the eastern Canadian shield are correlated with geographic location.
Ashwal, L. D., Emslie, R. F., Wooden, J. L.   +2 more
core   +1 more source

Improved Laboratory Transition Probabilities for Ce II, Application to the Cerium Abundances of the Sun and Five r-process Rich, Metal-Poor Stars, and Rare Earth Lab Data

, 2009
Recent radiative lifetime measurements accurate to +/- 5% using laser-induced fluorescence (LIF) on 43 even-parity and 15 odd-parity levels of Ce II have been combined with new branching fractions measured using a Fourier transform spectrometer (FTS) to ...
Aoki, Arlandini, Brault, Burris, C. Sneden, Condon, Cowan, Cowan, Cowan, Delbouille, Den Hartog, Den Hartog, Den Hartog, E. A. Den Hartog, Fedchak, Grevesse, Grigoriev, I. I. Ivans, Ivans, J. E. Lawler, J. J. Cowan, Kurucz, Lawler, Lawler, Lawler, Lawler, Lawler, Lawler, Lawler, Lawler, Lodders, Magain, Martin, Martin, Moore, Palmeri, Roederer, Simmerer, Sneden, Sneden, Sneden, Westin, Woodgate, Zhang   +43 more
core   +1 more source

In situ trace element and Sm-Nd isotope analysis of accessory minerals in an Eoarchean tonalitic gneiss from Greenland: Implications for Hf and Nd isotope decoupling in Earth's ancient rocks

Chemical Geology, 2019
J. Hammerli, A. Kemp, M. Whitehouse
semanticscholar   +1 more source

Novel materials based on Ruddlesden–Popper phases for solid oxide fuel cells and oxygen separation membranes: Fundamentals of oxygen transport

Chimica Techno Acta
In the field of modern hydrogen energy, obtaining pure hydrogen and syngas and then being able to use them for green energy production are significant problems.
Vladislav Sadykov, Ekaterina Sadovskaya, Nikita Eremeev, Alexander Kolchugin, Elena Filonova, Viktor Tsvinkinberg, Tatyana Zhulanova, Elena Pikalova   +7 more
doaj   +1 more source

Sudbury project (University of Muenster-Ontario Geological Survey): Sr-Nd in heterolithic breccias and gabbroic dikes [PDF]

One major objective of our Sudbury project was to define origin and age of the huge breccia units below and above the Sudbury Igneous Complex (SIC). The heterolithic Footwall Breccia (FB) represents a part of the uplifted crater floor.
Brockmeyer, P., Buhl, D., Deutsch, A., Dressler, B., Lakomy, R.   +4 more
core   +1 more source

Nucleosynthesis: Stellar and Solar Abundances and Atomic Data [PDF]

, 2006
Abundance observations indicate the presence of often surprisingly large amounts of neutron capture (i.e., s- and r-process) elements in old Galactic halo and globular cluster stars.
Collier, Jason, Cowan, John J., DenHartog, E. A., Dodge, Homer L., Lawler, James E., Sneden, Christopher   +5 more
core   +4 more sources

Lu-Hf and Sm-Nd Isotopic Studies of Nakhlite Northwest Africa 10153

, 2016
We report Sm-Nd and Lu-Hf ages for new nakhlite NWA 10153 and discuss similarities and potential source affinities among nakhlites.
Righter, Minako, Lapen, Thomas, Andreasen, Rasmus, Irving, Anthony   +3 more
openaire   +2 more sources

1.90-1.88Ga arc magmatism of central Fennoscandia: geochemistry, U-Pb geochronology, Sm-Nd and Lu-Hf isotope systematics of plutonic-volcanic rocks from southern Finland

Geologica Acta, 2016
The earliest Svecofennian magmatism in southern Finland has been dated at 1.90-1.88Ga. As an example of this, the Orijärvi (ca. 1.89Ga) and Enklinge (ca.
J. KARA, M. VÄISÄNEN, Å. JOHANSSON, Y. LAHAYE, H. O'BRIEN, O. EKLUND   +5 more
doaj