Results 161 to 170 of about 40,961 (371)
Sedimentology, EarlyView.ABSTRACT Understanding the biotic and abiotic influences on the deposition and diagenesis of recent microbial carbonates is crucial for addressing the environmental and ecological significance of ancient organosedimentary structures. This study investigates these factors and their expression in the microstructure of Holocene tufa thrombolites from a ...
Paulo Quezada +10 more
wiley +1 more source
Genesis of distribution of strontium isotope in igneous rocks
, 2019 V. S. Shkodzinskiy
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Terra Nova, EarlyView.ABSTRACT The Transbrasiliano‐Kandi‐4°50′ (TK4) shear zone in western Gondwana crosscuts South America and NW Africa for at least 6000 km. Despite its impressive size, the timing of the main episode of dextral ductile shearing is uncertain. We present detailed in situ multi‐mineral geochronology of mylonites from both Brazil and Algeria supporting that ...
F. A. Caxito +4 more
wiley +1 more source
Single particle structure of exotic strontium isotopes
, 2017 The sudden onset of ground state deformation and the emergence of shape-coexisting states in the vicinity of N~60 and Z~40 has been a subject of substantial interest for many years. It has been shown that the emergence of deformed low-energy configurations can be explained in the shell model by the evolution of single particle structure and the ...
openaire +1 more source
Dating C/S Structures in Syntectonic Granites by In Situ Rb‐Sr Analyses on Muscovite
Terra Nova, EarlyView.ABSTRACT The interplay of crystallisation, deformation and fluid–rock interactions makes deciphering geochronological information complex in syntectonic granites. In this study, we apply in situ Rb‐Sr analyses to selected samples from the Questembert Variscan syntectonic granite in Western France, which was emplaced along the South Armorican Shear Zone
Philippe Boulvais, Romain Tartèse
wiley +1 more source
Strontium isotope studies of sedimentary rocks
, 2017 The present investigation has been undertaken in an attempt to clarify the effects of hte physico-chemical conditions encountered during burial diagenesis and very low-grade metamorphism on the Rb-Sr systems of the various components of argillaceous sediments.
openaire +1 more source