中国主要克拉通前寒武纪裂谷分布与油气勘探前景

doi:10.7623/syxb201701002

CORC > 北京大学 > 地球与空间科学学院

	中国主要克拉通前寒武纪裂谷分布与油气勘探前景; Distribution and petroleum prospect of Precambrian rifts in the main cratons, China
	管树巍 ; 吴林 ; 任荣 ; 朱光有 ; 彭朝全 ; 赵文韬 ; 李杰
刊名	石油学报
	2017
关键词	前寒武纪裂谷超大陆华北克拉通塔里木克拉通扬子克拉通 Precambrian rift supercontinent North China Craton Tarim Craton Yangtze Craton
DOI	10.7623/syxb201701002
英文摘要	利用地质、地球物理和钻井资料编制中国主要克拉通盆地长城系、蓟县系和南华系残余厚度图,初步查明中-新元古代裂谷分布.华北和扬子克拉通中-新元古代裂谷中心以一套由粗快速变细的裂陷层序为标志,从目前的裂谷期地层等时对比格架上判断,现今鄂尔多斯盆地和四川盆地腹部的中-上元古界烃源岩均不如盆地覆盖区外的裂谷中心区域发育.塔里木克拉通南部和北部新元古代裂谷则具有不同的展布特征、形成时间和成因演化,塔里木南部的裂谷活动与以华南大陆(由扬子克拉通和华夏克拉通构成)为中心的地幔柱作用有关,而塔里木北部的裂谷主要形成于罗迪利亚超大陆外侧泛大洋俯冲引起的弧后伸展作用.塔里木南部裂谷开启时间较华南晚约20～40 Ma,但比塔里木北部提前至少40 Ma.前寒武纪裂谷演化对早寒武世沉积盆地具有重要的控制,使得后者具有“向前相似”而不是“向后相似”的特点.在塔里木和扬子,早寒武世盆地与南华纪—震旦纪裂谷盆地具有显著的继承性关系;在华北,青白口纪裂谷活动中心向东南缘移位控制了早寒武世盆地的发育位置和海侵方向.就目前的研究程度而言,中国古老克拉通前寒武纪裂谷的类型和分布特征仍显示出动力学上的多样性和复杂性,因而在充填演化和勘探价值研究上也有不同的观点和结论.近期研究除应继续加强地球物理资料处理,以更精细落实盆地覆盖区隐伏裂谷和裂陷外,也应重点开展裂谷期层序识别、地层对比和充填模式建立工作,努力解决前寒武纪裂谷类型及其演化的动力学问题,以恢复与烃源岩沉积阶段的盆地原型,查明烃源岩分布规律.; Geologic,geophysical and drilling data were used to prepare the thickness distribution maps of Changchengian,Jixian and Nanhuan systems in China's major craton basins,so as to preliminarily prove the distribution of Precambrian rift.The Precambrian rift centers of North China and Yangtze cratons are embodied by a set of rift sequence rapidly changing from coarse to fine.It is judged from isochronal comparison framework of the existing rifting strata that the Meso-Neoproterozic source rocks in Ordos Basin and Sichuan Basin hinterland were less developed than the rift center areas beyond the basin coverage.However,the Neoproterozoic rifts in the southern and northern Tarim Basin have different distribution patterns,formation ages and genetic evolutions.The rifting in the southern Tarim Basin was related to the mantle plume effect with South China continent (constituted by Yangtze Craton and Huaxia Craton) as the center,while the rifts in the northern Tarim Basin were mainly formed by the back-arc expanding due to Panthalassa subduction around the Rodinia supercontinent.The rifts in the southern Tarim Basin were opened later than Huanan by 20-40 Ma,but earlier than the northern Tarim Basin by 40 Ma.The Precambrian rift evolution played an important role in controlling the Early Cambrian sedimentary basins,for which the latter is characterized by "forward similarity" rather than "backward similarity".In Tarim and Yangtze areas,Precambrian basins had significant inheritances from Nanhua-Sinian rift basins.In North China,Qingbaikou rifting center migrated towards southeast,controlling the development location and transgressive direction of the Early Cambrian basin.Based on the current researches,the development location,scale and distribution characteristics of Precambrian rift in China's old cratons still show a diversity and complexity in dynamics,leading to different views and conclusions on filling evolution and exploration values.Besides enhancing seismic data processing to further pinpoint concealed rifts within the basin,recent researches should also focus on rifting sequence identification,stratigraphic correlation and filling modeling,attempting to determine the Precambrian rift types and solve evolutionary dynamic problems,so as to restore the basin prototype in the stages closely related to hydrocarbon-generation and prove the distribution laws of source rocks.; 中国石油天然气股份有限公司科技项目“油气勘探新领域、新理论、新方法、新技术研究”; 1; 9-22; 38
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/483789]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	管树巍,吴林,任荣,等. 中国主要克拉通前寒武纪裂谷分布与油气勘探前景, Distribution and petroleum prospect of Precambrian rifts in the main cratons, China[J]. 石油学报,2017.
APA	管树巍.,吴林.,任荣.,朱光有.,彭朝全.,...&李杰.(2017).中国主要克拉通前寒武纪裂谷分布与油气勘探前景.石油学报.
MLA	管树巍,et al."中国主要克拉通前寒武纪裂谷分布与油气勘探前景".石油学报 (2017).