Introduction: Many lunar samples record some degree of disturbance to their U-Pb isotopic systematics [e.g., 1,2]. This disturbance may be reflected in Pb-Pb, U-Pb, U-Pb, or concordia ages that are discordant among the U-Pb systems as well as with more robust Sm-Nd and Rb-Sr ages. Both mare basalt 10017 and norite 78238 fail to yield consistent geochronologic results among their Pb-Pb, U-Pb, an...

The results of our combined U–Pb, Rb–Sr, and Sm–Nd isotope study of mare basalt 10017 contribute to the understanding of the petrogenetic processes involved in the origin of geochemical diversity in lunar mare basalt sources, as well as the U–Pb isotope systematics of the Moon. The Rb–Sr, Sm–Nd, and U–Pb isotope systems yield concordant crystallization ages of 3.633 ± 0.057 Ga, 3.678 ± 0.069 Ga...

The observation of superconductivity in infinite layer nickelate (Nd,Sr)NiO$_{2}$ thin films has led to rapid theoretical and experimental investigations these copper-oxide-analogue systems [1-15]. Superconductivity also been found (Pr,Sr)NiO$_{2}$ [16,17], but not previously (La,Sr)NiO$_{2}$ [2], raising a fundamental question whether is associated with the presence rare-earth moments [18,19]....

Neoproterozoic gneisses at Meatiq and Hafafit in the Eastern Desert of Egypt give Rb–Sr and U–Pb zircon ages of 600–750 Ma. These gneisses are interpreted by different workers to represent deeper levels of juvenile Neoproterozoic crust or Archaean/Palaeoproterozoic crust that was remobilized during Neoproterozoic time. Geochemical and Sr–Nd isotope compositions for these gneisses reported here ...

Despite the recent discovery of superconductivity in Nd$_{1-x}$Sr$_{x}$NiO$_2$ thin films, absence and antiferromagnetism their bulk materials remain a puzzle. Here we report $^{1}$H NMR measurements on powdered Nd$_{0.85}$Sr$_{0.15}$NiO$_2$ samples by taking advantage enriched proton concentration after hydrogen annealing. We find large full width at half maximum spectrum, which keeps increasi...

Introduction: Metadolerite dykes in the Western Dharwar Craton represent oldest generation of mafic dyke swarms craton. The emplacement these after a period crust building activity and komatiite volcanism, helps to understand evolution Subcontinental Lithospheric Mantle (SCLM) Archean dynamics. Methods: We report whole rock major, trace element geochemistry Sr-Nd isotope characteristics for thi...