Chemical Composition and Trace Element Content of Meteorites

摘要

By neutron activation analysis, the trace elements Sr, Ba, Se, Te, Ta in chondrites and their separated silicate phases were determined. In a great number of stony and iron meteorites as well as in separated phases of chrondrites and iron meteorites the elements Ti, Mn, Na, Cr, Cu, Ga, Ge were determined (also by neutron activation analysis, NAA). The main and minor constituents of irons, chondrites, and their separated phases were determined, using wet-chemical macroanalysis. Some investigations by an electron-beam microprobe were carried out. In the troilite phase of the Odessa iron the mineral Mn-daubreelite could be detected. A conception on accretion of the planets from a primordial nebula and on the origin of carbonaceous chondrites is suggested. (Author)