Results 11 to 20 of about 4,715 (162)

Sr-Nd-Hf Isotopic Disequilibrium During the Partial Melting of Metasediments: Insight From Himalayan Leucosome

Frontiers in Earth Science, 2022
Radiogenic isotopes of granitoids are widely applied to fingerprint the source of granitoids and study the magma mingling and assimilation processes, aiming to decipher the planetary differentiation.
Lei Yang, Lei Yang, Lei Yang, Jia-Min Wang, Xiao-Chi Liu, Gautam P. Khanal, Gautam P. Khanal, Fu-Yuan Wu, Fu-Yuan Wu   +8 more
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Isotopic and geochemical features of the genesis of igneous complexes and ore-magmatic systems in the Chukotka sector of the Russian Arctic coast

Литосфера, 2020
Research subject. The isotopic composition (Pb-Pb, Sm-Nd, Rb-Sr, Os/Os, Hf/Hf, 3 He/4 He, etc.) of magmatic complexes and ore-magmatic systems (OMS) of two ore clusters (Kupolsky and Ilirneysky) located in the subpolar Western Chukotka was studied. These
V. G. Sakhno, L. S. Tsurikova
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Hf-Nd Isotopes in Archean Marine Chemical Sediments: Implications for the Geodynamical History of Early Earth and Its Impact on Earliest Marine Habitats

Geosciences, 2018
The Hf-Nd isotope systems are coupled in magmatic systems, but incongruent Hf weathering (‘zircon effect’) of the continental crust leads to a decoupling of the Hf-Nd isotope systems in low-temperature environments during weathering and erosion processes.
Sebastian Viehmann
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Effects of acid leaching on the Sr‐Nd‐Hf isotopic compositions of ocean island basalts [PDF]

Geochemistry, Geophysics, Geosystems, 2010
The ability to conduct multi‐isotopic analyses (e.g., Sr‐Nd‐Hf‐Pb) on the same sample is critical for studies that evaluate the mantle source components of oceanic basalts. The isotopic compositions of relatively immobile elements, such as Nd (and other REE) and Hf, are considered to be relatively resistant to alteration, however, accurate Sr and Pb ...
Nobre Silva, Ines G., Weis, Dominique, Scoates, James S.   +2 more
openaire   +1 more source

ZIRCON IN HIGH‐MG DIORITE OF THE CHELYABINSK MASSIF (SOUTH URALS): MORPHOLOGY, GEOCHEMICAL SIGNATURE, AND PETROGENESIS IMPLICATIONS

Геодинамика и тектонофизика, 2019
The article is focused on the morphology, trace element composition, U‐Pb and Lu‐Hf systems in zircon in high‐Mg diorite of the Chelyabinsk granitoid massif.
T. A. Osipova, G. A. Kallistov, M. V. Zaitseva   +2 more
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Petrogenesis of Mesozoic Magmatic Suites in the Jiaodong Peninsula: Implications for Crust-Mantle Interactions and Decratonization

Lithosphere, 2023
The North China Craton (NCC) has thick lithosphere in the Paleozoic (>200 km) but appears to be decratonized in the Mesozoic. However, the actual processes operated in the lower crust-deep mantle are still unclear.
Leilei Dong, Zhiming Yang, Mingchun Song, Xin Bai   +3 more
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Huge growth of the late Mesoarchean–early Neoarchean (2.6~3.0 Ga) continental crust in the North China Craton: A review

Dizhi lixue xuebao, 2022
Based on a brief introduction of the spatial distribution, rock types and formation ages of the late Mesoarchean–early Neoarchean (2.6~3.0 Ga) rocks in some key areas of the North China Craton, this paper summarizes the ages and geochemical and Nd-Hf-O ...
WAN Yusheng, DONG Chunyan, XIE Hangqiang, LI Yuan, WANG Yuqing, WANG Kunli   +5 more
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Copper and its Isotopes in Organic-Rich Sediments: From the Modern Peru Margin to Archean Shales

Geosciences, 2019
The cycling of copper (Cu) and its isotopes in the modern ocean is controlled by the interplay of biology, redox settings, and organic complexation. To help build a robust understanding of Cu cycling in the modern ocean and investigate the potential ...
Emily R. Ciscato, Tomaso R. R. Bontognali, Simon W. Poulton, Derek Vance   +3 more
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Detrital zircon Hf isotopic compositions indicate a northern Caledonian connection for the Alexander terrane [PDF]

Lithosphere, 2013
Various plate reconstructions predict that the Alexander terrane, a Neoproterozoic-Jurassic crustal fragment now located in the North American Cordillera, evolved in proximity to the northern Appal ...
Luke P. Beranek, Cees R. van Staal, William C. McClelland, Steve Israel, Mitch G. Mihalynuk   +4 more
openaire   +1 more source

Impact of chemical treatments on the molecular and stable carbon isotopic composition of sporomorphs [PDF]

Biogeosciences
The stable carbon isotope composition (δ13C) of plants and algae is influenced by environmental factors, such as pCO2, water availability, and altitude.
Y. F. Bats, K. G. J. Nierop, A. Stuart-Lee, J. Frieling, J. Frieling, L. van Roij, G.-J. Reichart, G.-J. Reichart, A. Sluijs   +8 more
doaj   +1 more source