Results 11 to 20 of about 77,130 (271)

The Osmium Isotope Signature of Phanerozoic Large Igneous Provinces

open access: yesGeophysical Monograph Series, Page 229-246., 2021

Exploring the links between Large Igneous Provinces and dramatic environmental impact

An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Alexander J. Dickson   +2 more
wiley  

+2 more sources

Rapid Purification of Sr and Nd for Isotope Analysis with Multiple-column Method

open access: yesYankuang ceshi, 2020
BACKGROUND The Sr and Nd isotopic compositions of a sample depend on its initial isotopic ratios, the ratios between the parent nuclide and daughter product, and the decay time.
ZHU Zhi-yong, PAN Chen-xu, ZHU Xiang-kun
doaj   +1 more source

Implications of Nd isotopic mapping for crustal composition and metallogenesis in the Sanjiang orogenic belt (SW China)

open access: yesFrontiers in Earth Science, 2023
The Sanjiang orogenic belt, located in southwestern China and the southeastern Tibetan Plateau, includes a variety of economically important metal deposits.
Lingling Yuan   +4 more
doaj   +1 more source

Accretion Tectonics in Western Gondwana Deduced From Sm‐Nd Isotope Mapping of Terranes in the Borborema Province, NE Brazil

open access: yesTectonics, 2018
Whole rock Sm‐Nd isotope mapping of metaplutonic and metasedimentary rocks in the Tranversal Sub‐province of the Borborema Province (central Western Gondwana) is used to verify the role of crustal processes in the region.
L. Santos   +5 more
semanticscholar   +1 more source

Reference Material Preparation of 143Nd/144Nd Isotope Ratio

open access: yesYankuang ceshi, 2017
143Nd/144Nd isotope ratio is the key for Sm-Nd isotope method. The 143Nd/144Nd isotope ratio of geological samples varies within a small range, and thus the 143Nd/144Nd isotope ratio analysis must be precise.
TANG Suo-han   +11 more
doaj   +1 more source

Implications of eocene-age philippine sea and forearc basalts for initiation and early history of the izu-bonin-mariana arc [PDF]

open access: yes, 2018
Whole-rock isotope ratio (Hf, Nd, Pb, Sr) and trace element data for basement rocks at ocean drilling Sites U1438, 1201 and 447 immediately west of the KPR (Kyushu-Palau Ridge) are compared to those of FAB (forearc basalts) previously interpreted to be ...
Arculus,, R   +7 more
core   +3 more sources

The Vazante and Canastra groups revisited: Sm-Nd and Sr isotopes - evidence for contribution from Tonian intraplate magmatism during passive margin development along the SW São Francisco margin, Brazil

open access: yesBrazilian Journal of Geology, 2019
Combined Sm-Nd isotope studies and U-Pb ages of detrital zircons have shown significant differences between the provenance patterns of Neoproterozoic metasedimentary successions in the Southern Brasília belt.
Manuela de Oliveira Carvalho   +4 more
doaj   +1 more source

Separation of Sr, Nd, and U from Geological Samples Using Tandem Resin Column

open access: yesYankuang ceshi, 2023
BACKGROUND Uranium-series nuclides are one of the three major radioactive decay systems, which are suitable for studying various geological processes at different time scales. In addition, 87Sr/86Sr and 143Nd/144Nd isotopes (Sr-Nd isotopes for short) are
LUO Zhenghua   +7 more
doaj   +1 more source

Simultaneous in situ determination of U‐Pb and Sm‐Nd isotopes in monazite by laser ablation ICP‐MS

open access: yesGeochemistry, Geophysics, Geosystems, 2014
Results are presented for in situ simultaneous determination of U‐Pb and Sm‐Nd isotopes in monazite using the Laser Ablation Split‐Stream (LASS) method. This method uses a laser ablation system coupled to a magnetic‐sector inductively coupled plasma mass
Dylan J. Goudie   +4 more
doaj   +1 more source

Evaluating the effect of leaching on trace element and Nd-Pb isotopic systematics in continental basalts

open access: yesSolid Earth Sciences, 2019
Leaching technique was mostly carried out on submarine rock powder to minimize or eliminate secondary effect of seawater interaction on Sr and Pb isotope magmatic signatures.
Yan Zhang   +6 more
doaj   +1 more source

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