一、引言 1967年,Eglinton和Calvin提出了将地质体中的某些有机化合物作为“生物标志物”(Biomarkers)和“化学化石”(Chemical fossils)的概念,这类化合物是古生物遗体的某些成份在长期的埋藏条件下,发生一系列地球化学作用导致结构变化而形成的稳定的有机化合物,如类异戊二烯烃,甾烷,萜烷等。由于这些生 I. INTRODUCTION In 1967, Eglinton and Calvin proposed the concept of using certain organic compounds in geologic bodies as “biomarkers” and “chemical fossils,” which are some of the paleontological remains Composition Under long-term burial conditions, a series of stable organic compounds such as isoprenoids, steranes, terpanes and the like are formed by a series of geochemical changes that lead to structural changes. Because of these students