华北地块中—上元古界上升流沉积相及其与油气的关系  

NEOPROTEROZOIC-MESOPROTEROZOIC UPWELLING FACIES AND ITS RELATIONSHIP WITH HYDROCARBON IN NORTH CHINA

作　　者：吕炳全[1] 胡望水[2] 王红罡[1] 沈伟锋 张玉兰[1] 

机构地区：[1]同济大学海洋与地球科学学院,上海200092 [2]长江大学地球科学学院,湖北荆州434023 [3]中国海洋石油公司上海分公司勘探部,上海200030

出　　处：《海洋地质与第四纪地质》2005年第3期83-88,共6页Marine Geology & Quaternary Geology

基　　金：国家自然科学基金项目(40276021)

摘　　要：华北地块上的中-上元古界是我国最古老的沉积岩系,分3系、12个组,通过岩性、沉积相和古生物等分析,发现其中有丰富的上升流沉积相,并可分为3个亚相:富镁碳酸盐岩夹燧石薄层亚相、黑色页岩亚相和叠层石亚相等。上升流引发缺氧事件,形成中-上元古界中重要的烃源岩。研究表明,上升流沉积相与地层中有机质含量呈正相关关系,因而根据地层中上升流沉积相的发育程度,可对本区中-上元古界中的油气作出评价,上升流的发现开拓了本区油气资源研究的新方向。Neoproterozoic-Mesoproterozoic strata are the oldest sedimentary system in North China. Thickness of this sedimentary system is 9 500 m, which is mainly composed of Mg-rich carbonate rocks intercalated with beds of clastic rock, clayey rock and evaporating rock. This sedimentary system is classified into three sub-systems and twelve groups. According to analyses of lithologic composition, sedimentary facies and palaeontology, many upwelling facies have been discovered in the oldest sedimentary system that may be divided into three subfacies： Mg-rich carbonate rock and intercalated bed of flint thin-bed, black shale and stromatoloid. The upwelling resulted in the anoxic rocks of Neoproterozoic-Mesoproterozoic. Study shows event and led to the deposition of important source there is a direct correlation between the upwelling sedimentary facies and organic matters in the strata. On the basis of amount of upwelling sedimentary facies, it is possible to appraise petroleum and natural gas of Neoproterozoic-Mesoproterozoic strata in this ar ea. Discovery of upwelling opened up a new orientation of studies on natural resources of oil and gas.

关 键 词：上升流沉积相 缺氧环境 烃源岩 华北地块 

分 类 号：P736.22[天文地球—海洋地质]