【摘要】 在莺歌海-琼东南盆地的崖13-1凝析油和第三系滨海（梅山组）及滨海沼泽煤系（崖城组）的沉积岩抽提物中检出了一些特殊的五环三萜烷,其中除羽扇烷-Ⅰ和C₃₀双杜松烷（W、T）外,还首次发现C₃₁双杜松烷。这些特殊的五环三萜烷可能是由第三系滨海岸带生长的植物所衍生的富含树脂、萤光镜质体的干酪根热降解生成。因此,双杜松烷、羽扇烷-Ⅰ和奥利烷一样同是陆源植物生源输入的分子标志,是本区由—油,油—岩对比的新指标。更多还原

【Abstract】 Some special pentayclic tritepanes has been found from condensate of Yacheng 13—1 gas field and sedimentary rock extracts of littoral deposit （Meishan formation） and littoral swamp coal measure strata （Yacheng formation） of Tertiary. C₃₁ dicadinane has been first found except lupane-l and C₃₀ dicadinane （W、T）.These special pentayclic tritepanes may be formed by rich resin which derived from plants growed in Tertiary littoral zone ,and by kerogen thermal degradation of the fluorescent vitrinite.Therefore,dicadinane,Lupane-Ⅰ and oleanane are all indicator moleculars of petroleum source came from terrigenous plants,are new contrast index of oil-oil ,oil-rock in the area.更多还原