黑龙江省达连河油页岩地球化学特征及成因探讨  

Study on Geochemical Characteristics and Genesis of the Dalianhe Oil Shale in Heilongjiang Province

作　　者：王世辉[1] 陈春瑞[2] 郑玉龙[2] 刘胜英[2] 

机构地区：[1]中国科学院地质与地球物理研究所,北京100029 [2]大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712

出　　处：《吉林大学学报（地球科学版）》2006年第6期933-937,共5页Journal of Jilin University：Earth Science Edition

基　　金：国家油气专项(XQ-2004-02)

摘　　要：论述了迭连河舍煤段油页岩度油页岩段油页岩的地球化学特征，探讨了两套油页岩成因。这两套油页岩地球化学性质有很多相似之处，主要表现为油页岩都属于中熔或难熔的硅质灰分，SiOz、Al2O3及Fe2O3含量很高；无机元素Mn／Ti小于0．1，Sr／Ba为0．1～0．5，V／Ni为2．6～7．0；有机质类型以腐泥腐殖型为主，正构烷烃OEP值为1．55～3．67，具奇碳数优势，主峰碳为nC23和C29，Pr／Ph比值平均高迭2．30，具强烈的姥鲛烷优势，Pr／nC17比值为1．18～3．20，说明这两套油页岩都形成于淡水、近岸度弱氧化—弱还原的湖沼相沉积环境。但含煤段油页岩沉积时期高温、湿润的古气候条件下的喜湿植物面貌，使油页岩母质类型具有较多的富氢组分，这是造成两套油页岩品质差异的主要原因。The authors discuss the geochemical characteristics and genesis of the Dalianhe oil shale in both the coal and the oil shale members. The oil shale in the two members are quite similar in geochemistry in that both are of high percentage of SlOe, Al2O3 and Fe2O3 （middle to difficult lava silicon ash ）, ratios of Mn/Ti less than 0.1, Sr/Ba between 0.1 and 0.5 and V/Ni between 2.6 and 7.0. The organic styles are mainly composed of sapropel humus. OEP values of n-alkanes are between 1.55 and 3.67, showing outstanding odd carbon number distribution, with nC23 and nC29 as the highest peaks. Average Pr/Ph ratio is up to 2.30, indicating pristine dominance. Pr/nC17 ratios are between 1.18 and 3.20. All these characteristics reflect the oil shale in the two members are deposited in a fresh water, lake swamp, alongshore and lower oxygen and anoxic environment condition. The parent material styles from the coal member are richer in hydrogenous component related to wetness-like flora, which is the main reason for the quality difference of the oil shale in the two members.

关 键 词：达连河 油页岩 无机元素 有机质类型 饱和烃 成因 

分 类 号：P618.12[天文地球—矿床学]