The Sanjiang Indosinian orogen, located in the eastern part of Paleo-Tethys tectonic domain, is a critical region to study Paleo-Tethyan Ocean evolution. Middle Permian–Late Triassic magmatic rocks are widespread Deqin–Weixi–Madeng area southwestern (SW) yet their petrogenesis and setting remain disputed. In this study, LA-ICP-MS zircon U-Pb age Hf isotopes, whole-rock elemental Sr-Nd isotope g...

Understanding the subduction and recycling of continental crust is crucial for reconstructing long-term evolutionary history Earth's mantle crust. The Himalaya-Tibet orogen arguably world's best natural laboratory investigating these processes. Cenozoic post-collisional ultrapotassic volcanic rocks are common in Lhasa block southern Tibet they can provide important clues to crust-mantle interac...

The decay of the very neutron-rich nucleus 100 Rb has been studied by γ-spectroscopy of on-line mass-separated samples. Schemes for β-decay to 100 Sr and βn-decay to 99 Sr are presented. New sets of transitions in 99 Sr and 100 Sr with identical energies are observed. All identical bands so far observed in neutron-rich Sr isotopes obey a simple energy rule valid for even-even, odd-even and odd-...

Understanding the mechanism of dust generation is critical for evaluating global cycles nutrient elements and interpreting paleorecords derived from aeolian deposits. Here, we use a novel geochemical tracer, 234U/238U activity ratio that reveals particle comminution age, Sr-Nd isotopes to investigate how silt-sized particles are produced in Taklimakan Desert, major source region having effects ...

Neutron-rich isotopes with N>60 and A.100 are characterized by strong axial deformation. Strontium isotopes are the most deformed nuclei known so far in this region. Quadrupole deformations of b.0.4 have been deduced for Sr, Sr, and Sr from the lifetimes of the first excited states and from mean-square radii measured by collinear laser spectroscopy @1–5#. According to these results, ground-stat...

[1] Sr and Nd isotopic composition of silicate fractions of sediments have been measured in two well dated gravity cores from the eastern Arabian Sea archiving a depositional history of ∼29 and ∼40 ka. The Sr/Sr and "Nd in the northern core (SS‐3104G; 12.8°N, 71.7°E) ranges from 0.71416 to 0.71840 and −8.8 to −12.8; these variations are limited compared to those in the southeastern core (SS‐310...

(2010). Unravelling the effects of melt depletion and secondary infiltration on mantle re-os isotopes beneath the french Massif Central. Copyright and Moral Rights for the articles on this site are retained by the individual authors and/or other copyright owners. For more information on Open Research Online's data policy on reuse of materials please consult the policies page. Unravelling the ef...