Untersuchungen an Steinmeteoriten mit extrem hohem Edelgasgehalt III. Über den Sitz der leichten Uredelgase im Chondriten Pantar

Abstract

An investigation of the separated dark fraction of the chondrite Pantar has been made. Rare gas analyses of separated minerals show that the main components of the meteorite, i. e. silicates, larger grains of nickel-iron and troilite, contain only very small amounts of primordial helium and neon. The main amounts of these gases have been found in fine-grained nickel-iron and troilite which are supposed to have been newly formed after the crystallisation of the main minerals of the meteorite. Problems related to the variations of the He/Ne-ratios which have been found are discussed.