Rare gas isotope contents and K-Ar ages of mineral concentrates from the Indarch meteorite

摘要: The rare gas contents and isotopic abundances were measured for mineral separates from the enstatite chondrite Indarch. A cosmic ray exposure of 11 million years was estimated. There is an indication a higher temperature during time meteorite exposed to rays than its preceding history. Different K-Ar ages found different concentrates ranging in age 2.4 4.4 billion years. Xe129/Xe132 ratio varies 1.7 4.9 2.1 troilite fraction which one might expect I Te; our conclusion that either Xe lost early history or Xe129 not associated Indarch with Te.