| 青海湖现代沉积物中三种新结构烯烃化合物及其地球化学意义 |
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| 引用本文： | 王兆云,范璞.青海湖现代沉积物中三种新结构烯烃化合物及其地球化学意义[J].沉积学报,1993,11(2):113-117. |
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| 作者姓名： | 王兆云 范璞 |
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| 作者单位： | 中国科学院兰州地质研究所 |
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| 摘 要： | 笔者首次在地质体中检出了三种新结构三环二萜烯,△8.9山达海松二烯、二氢芮木泪柏烯、13-异海松二烯,探讨了其生源母质及其在地质体中的演化过程。这种结构的烯烃化合物可以作为陆源高等植物的示踪剂,反映了青海湖中有机质来源除了湖中浮游生物和底牺生物外,陆源高等植物的贡献是不可忽视的。
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| 关 键 词： | 新结构三环二萜烯 生源母质 演化过程 地化意义 |
| 收稿时间： | 1992-03-31 |
Three New Structural Terpenes and Their Geochemical Significance in Recent Sediment of Qinghat Lake |
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| Institution: | Lanzhou Institute of Geology, Chinese Academy of Sciences |
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| Abstract: | Three new structural tricyclic diterpenes are first reported in this paper. They are examined in the recent sediments of Qinghai Lake and their eluting time is between bicylic ter-panes of long chain and tetracyclic diterpanes of m/z 123 mass chromatogram. They are named as △8.9-sandaracopimaradiene, dihydrorimuene, 13-isopimaradiene through the analysis of broken mechanism of fragments in mass spectrum and the contrast study of synthesized standard spectrum made by Weaver and Wenkert, their molecular ion peaks m/e are 272, 274,272.respectively,and correspond abundant peaks m/z are 257,259,137, respectively. The studied information about natural organic high molecular compounds shows that sandaracopimaric acid and pimaradiene acid had been isolated form resin acid and their structures had been identified. The authours deduce that sandaracopimaric acid and pimaradiene acid are the precursors of △8.9-sandaracopimadariene, 13-isopimaradiene. In addition, many literatures have reported that sandara copimaradiane and pimaradiane have been detected in oil and source rock. Therefore,the three new structural tricyclic diterpenes studied in this paper are the middle transfer productuons form the acids in high plants to alkanes in geologic body, the eveolution process is that acid is transfered into alkene through dehydroxylation and then transfered into alkane through hydrogenation. The detection of △8.9-sandaracopi-maradiene,dihydrori-muene,13-isopimaradiene not only enriched the types of biomarkers but also provided the proof for the transfer process of organic matter from organisms to geological body. These three new structural compounds examined in the recent sediment of Qinghai Lake reflects the information that organic matter in Qinghai Lake is not only derived from the organisms of the lake,but also has the input of terrigenous high plants. |
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