漠河盆地早白垩世依列克得组火山岩系烃源岩有机地球化学特征  

The Organic Geochemical Characteristics of Source Rock in Volcanic Rocks During Yiliekede Formation of Early Cretaceous in Mohe Basin

作　　者：高福红[1] 高红梅[2] 樊馥[3] 

机构地区：[1]吉林大学地球科学学院,长春130061 [2]中国石油大学资源与信息学院,北京102249 [3]同济大学海洋与地球科学学院,上海200092

出　　处：《吉林大学学报（地球科学版）》2010年第1期9-14,共6页Journal of Jilin University：Earth Science Edition

基　　金：国家油气资源战略选区专项(XQ-2004-07)

摘　　要：应用岩石热解、氯仿沥青抽提、饱和烃气相色谱和色谱-质谱等分析方法,对首次在漠河盆地依列克得组发现的烃源岩进行研究。结果表明:烃源岩由煤、油页岩和页岩构成,有机碳(TOC)质量分数>10%,干酪根类型主要为Ⅱ2,镜质体反射率(Ro)为0.56%～0.59%,属于低成熟阶段,烃源岩达到很好级别。烃源岩有机母质均以陆生高等植物输入为主,也有水生生物的输入,反映原始母质具有水生生物和陆源高等植物混源的特征。依列克得组沉积时期,湖盆水体含盐度及还原性具有较大的变化,处于淡水湖-咸水湖的交替状态,沉积水体分层比较明显,有利于有机质的保存和转化。The source rocks discovered Mohe basin are analysed by rock pyrolysis chromatography-mass spectrogram analys oil shale and shale, TOC content is more e t first in Yiliekede Formation during the Early Cretaceous in chloroform bitumen extration, gas chromatography and gas The results indicate that source rocks are composed of coal, an 10%, organic materials take type II 2 kerogen mainly, the distribution of Ro ranges from 0.56% to 0. 59% which belongs to low mature stage. The source rock has been of high grade. The organic materials of source rock are mainly from terrigenous plants combined with abundant aquatic organisms input, which reflects the mixed-source of organics input of terrigenous plants and hydrophilous alga. During Yiliekede Formation, the salinity and reduction of water change a lot so that salt water lake alternates with fresh water lake and it presents obvious chemistry stratify, which contributes to the retention and invert of organic.

关 键 词：依列克得组 烃源岩 有机地球化学特征 漠河盆地 火山岩 

分 类 号：P59[天文地球—地球化学] P618.13[天文地球—地质学]