太平洋中部低熟烃的生物标志化合物组成、分布及其演化特征  

Studies on composition,distribution and evolution of biomarkers in low-mature hydrocarbon from central Pacific

作　　者：张海生[1] 倪建宇[2] 扈传昱[1] 周怀阳[3] 薛斌[1] 张宏[1] 姚旭莹[2] 卢冰[1] 

机构地区：[1]国家海洋局海洋生态系统和生物地球化学重点实验室国家海洋局第二海洋研究所,浙江杭州310012 [2]国家海洋局海底科学重点实验室,浙江杭州310012 [3]中国科学院广州地球化学研究所,广东广州510640

出　　处：《热带海洋学报》2007年第1期28-34,共7页Journal of Tropical Oceanography

基　　金：国家自然科学基金项目(40676061);大洋矿产资源勘探开发专项(DY105-02-01)

摘　　要：采用气相色谱-电子捕获检测器(GC-ECD)内标法对中太平洋深海MP2001-01短柱地层中可溶有机质(氯仿沥青“A”)及其转化率、族组成、总烃进行了定量分析。研究结果显示,饱和烃/芳烃比值低,非烃含量高,类异戊二烯含量高,奇碳数优势弱(CPI为0.983—1.382),显示出具有低成熟度特点;同时发现烃类生物标志物的分子组合指数(轻重烃比值nC2-3/nC2+4)为0.631—0.950,标志本区低成熟烃母质主要来源于混合源。研究还显示,芳烃的甲基化和甲基重排作用受原始可溶有机质丰度、来源和演化程度的控制。The soluble organic matter from the deep-sea core MP2001-01 located in the central Pacific was analyzed by gas chromatography-electron capture detector （GC-ECD）, and the characteristics of chloroform bitumen ＂A＂, such as conversion rate, group composition, and total hydrocarbon, were determined. The results showed that the sediments were characteristic of low saturated-hydrocarbon/arene ratio, rich nohydrocarbon and isoprenoids, and slight preference of odd-even carbon （ CPI. 0. 983-1. 382 ）, indicating that the hydrocarbon was just at an early mature stage. Moreover, the molecular index （nC^-23/nC^＋24 0. 631-0. 950） of alkane biomarkers showed that the low mature hydrocarbon was mainly from mixed sources. In addition, methylation and methyl rearrangement of arenes were mainly controlled by the abundance, source and evolution degree of soluble organic matter.

关 键 词：中太平洋 可溶有机质 生物标志化合物 低熟烃 演化 

分 类 号：P735.4[天文地球—海洋生物学]