摘要
作者在我国典型的高蜡-特高蜡原油盆地大民屯凹陷下第三系上始新统一渐新统沙河街组的生油岩,及高蜡原油中检出了两个新型的、代表陆源高等植物输入的生物标志物——α雪松烯和花侧柏烯。这两个化合物是裸子植物门(Gymnospermae)松柏目(Coniferales)柏科(Cupressaceae),和两个杉科属(Taxodiaceae)针叶植物精油中的特征组分。在地质样品中,仅Grantham和Douglas(1980)报道从英国巴维(Bovey)盆地渐新统褐煤层中的一个化石树脂酸和一个褐煤蜡以及美国加利福尼亚艾奥尼(Ione)谷的上新统富硅高岭石中发现这两个化合物。近期,我们在原油及其生油岩中检出这两个化合物尚属首次报道。由于它们在大民屯生油岩抽提物中含量高且分布广,初步研究发现这类化合物在特高蜡原油中含量高于低含蜡原油,其检出为沉积盆地的古植物输入及特高蜡原油的形成机制提供了新的线索。化合物的确认是通过GC保留时间,GC-Ms谱图对比以及标样共注完成的。
Two novel sesquiterpanoids-α-cedrene and cuparene representative of the input ofspecial terrestrial higher plants have been idientified in some typical high-wax oils (wax content >30‰) and related source rocks in the Damintun depression, Liaohe Oilfield, eastern China. These two compounds are characteristic compounds derived from the older coniferous plant in the genera Cupressaceae and Taxodiaceae.In geological samples,α-cedrene and cuparene were only reported in two Tertiary fossil resins and a Tertiary montan wax by Grantham and Douglas (1980). The identification of these compounds in typical high-wax oils and related Paleogene source rocks is described for the first time. As has been detected, the high content of α-cedrene is produced in source rocks, but it is higher in high-wax oils than in ordinary oils. The presence of α-cedrene may provide some crucial information on the formation mechanism of high-wax oils and rbe process of input of plants to the depression. The validity of identification has been confirmed by comparison of MS spectra and CO-injection on GC and GC/MS.
出处
《地球化学》
CAS
CSCD
北大核心
1991年第3期276-282,共7页
Geochimica
基金
中国科学院有机地球化学开放研究室课题资助
中国科学院重大油气成因课题资助
