Results 31 to 40 of about 42,866 (280)
Entropy‐Stabilized Aluminate Catalysts That Break the Activity–Stability Tradeoff in CF4 Hydrolysis
Angewandte Chemie, EarlyView.Entropy‐stabilized aluminate breaks the activity–stability tradeoff in CF4 hydrolysis by combining a multication aluminate framework with an entropy‐stabilized lattice. An electron‐deficient Al–O environment is F‐philic but O‐phobic, enabling C–F activation while suppressing H2O poisoning. Under steam‐rich, strongly fluorinating conditions, the entropy‐
Seunghyuck Chi +7 more
wiley +2 more sources
Geochemistry, Geophysics, Geosystems, 2013 Rejuvenated volcanism refers to the reemergence of volcanism after a hiatus of 0.5–2 Ma following the voluminous shield building stage of Hawaiian volcanoes.
Michael Bizimis +3 more
doaj +1 more source
Литосфера, 2018 Object. This study firstly evaluates Hf-isotope characteristics of zircons from wehrlite of the platinum-bearing Feklistov massif, which is closely associated with platinum coastal placer deposits. Materials and methods.
Kreshimir N. Malitch, Inna Yu. Badanina
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Anais da Academia Brasileira de Ciências, 2021 Collisional granites of the Araçuaí Orogen, southeastern Brazil, record petrological and geochronological evidence for multiple crustal melting during the orogeny evolution. U-Pb zircon data indicate that these granites crystallized at 586 ± 2 M.y.
SANDRO MAURI +3 more
doaj +1 more source
Continental growth and the crustal record
, 2013 Funding: Natural Environment Research Council (NERC) (grant NE/J021822/1) and the University of St. Andrews.The continental crust is the archive of Earth history.
Hawkesworth, Chris +2 more
core +1 more source
High field strength element systematics and Lu-Hf & Sm-Nd garnet geochronology of orogenic eclogites [PDF]
, 2008 Concerning the Bulk Silicate Earth (BSE), the depleted mantle and the continental crust are thought to balance the budget of refractory and lithophile elements, resulting in complementary trace element patterns.
Schmidt, Alexander
core +1 more source
Beach placer, a proxy for the average Nd and Hf isotopic composition of a continental area
Chemical Geology, 2011 Beach placer deposits concentrate detrital heavy minerals which are the erosion products of large areas of continental crust. Here, we report the first analyses of Nd-Hf isotopic ratios and trace element concentrations that we measured in a beach placer from Camargue, France and in its pure mineral separates. Both the bulk composition of the placer and
Garçon, Marion +2 more
openaire +2 more sources
Hf isotopic compositions of the Hawaii Scientific Drilling Project Core and the source mineralogy of Hawaiian basalts [PDF]
Geophysical Research Letters, 1999 A large suite of Mauna Kea basalts from the Hawaii Scientific Drilling Project core show a progressive enrichment in radiogenic Hf with time (ϵHf = +11.4 to +13.1) well‐correlated with the increasingly radiogenic character of Nd. The alkali basalts erupted at the termination of the Mauna Kea stage are isotopically indistinguishable from the underlying ...
Janne Blichert‐Toft, Francis Albarède
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, 2014 This work was supported by the National Natural Science Foundation of China (grants 41472086 and 41272120), “111” Project (B08030), the fundamental Research Funds for the Central Universities, China University of Geosciences (Wuhan) (CUG2012019240 and ...
Zhong, Z. +4 more
core +1 more source
Geochemistry, Geophysics, Geosystems, 2018 The Hawaiian‐Emperor chain is the ∼6,000 km long surface expression of the deeply sourced Hawaiian mantle plume active over the past ∼81 Myr. The Hawaiian Islands (81–47 Ma) show only Kea compositions.
L. N. Harrison, D. Weis
doaj +1 more source