CARBON ISOTOPIC FRACTIONATION IN THE PROCESS OF FISCHER-TROPSCH REACTION IN PRIMITIVE SOLAR NEBULA

Carbon isotopic fractionation of low-weight molecules of the products of Fischer-Tropsch reaction under the conditions of Earth's accumulati on region in primitive solar nebula has been experimentally studied. A mong the reaction products, carbon dioxide has the heaviest isotopic c omposition; carbon isotopic composition of methane has a large variati on; different from biogenic natural gases, carbon isotopic composition s among ethane, propane and butane yield a reverse distribution patter n. It suggests that primordial hydrocarbons that were captured in the interior of the Earth during its accretion possess it reverse carbon i sotopic distribution pattern.