Effect of volcanism on maturation of sedimentary organic matter and its significance for hydrocarbon generation, a case:the East Sag of Liaohe Basin

It has been widely noticed that anomalous heating of volcanic eruption and magmaticintrusion have certain influence on the maturation of sedimentary organic matter. Thesecases are most favorable for studying the changes of organic molecule structures caused bythermal alteration. The results. in turns. are helpfull in investigating the evolutions of pe-troleum and coal. It is shown that the dominant effect of anomalous heating