The First Find of Native Rhenium in the Transitional Clay Layer at the Cretaceous/Paleogene Boundary in the Gams Section (Eastern Alps, Austria)

摘要

Native rhenium was first discovered in the Earth's crust in wolframites from a rare metal deposit in the Transbaikal region [1]. Native forms of sulfur and other elements were not found. The presence of native rhenium in nature is limited by the following information available at present. The study of the lunar regolith from two sites revealed native rhenium particles with different morphological features: irregular dense particles from Mare Fecunditatis and spheroidal particles from Mare Crisium. The origin of particles (less than 10 μm in size) is assigned to exhalative processes [2]. Among the extraterrestrial objects, native rhenium was found in Ni-iron and silicates from the Allende meteorite [3].