黑龙江省东部方正断陷内部格局的新认识及沉积-构造演化  

New understanding of interior structures and sedimento-tectonic evolution of Fangzheng Fault-Depression in eastern Heilongjiang Province

作　　者：邵曌一[1] 杨建国[2] 王洪伟[2] 吴根耀[3] 赵海玲[1] 

机构地区：[1]中国地质大学(北京)地球科学与资源学院,北京100083 [2]大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712 [3]中国科学院地质与地球物理研究所,北京100029

出　　处：《古地理学报》2013年第3期339-350,共12页Journal of Palaeogeography：Chinese Edition

基　　金：全国油气资源战略选区调查与评价专项(编号:XQ-2007-04)资助

摘　　要：依据黑龙江东部方正断陷新的三维地震资料,重新厘定了其主干断层——伊汉通断层(FZ3),发现该断层规模明显变大,对断陷的沉积-构造演化具有明显的控制作用。依据对伊汉通断层的新认识和FZ4、FZ5断层的发现,以及FZ6和FZ7断层的特征,确定方正断陷内部结构具有南北向(走向)分段、东西向(横向)分带的特点,并将方正断陷的沉积-构造演化划分成古近纪古新世—始新世的断陷期、始新世末的挤压隆起期、渐新世的差异沉降期和古近纪末期的挤压反转期4个阶段,指出东部凹陷埋藏深、面积大,是方正断陷新的油气勘探领域。Based on the recent 3D seismic data, it is represented that the Yihantong fault （FZ3） is a main interior fracture of the Fangzheng Fault-Depression, which shows an obvious constraints in the Paleo- gene sedimento-.tectonic evolution of the fault-depression. In addition, two other interior fractures, namely, the FZA and FZ5 faults, are determined by the data. Combined with characteristics of the FZ6 and FZ7 faults, the new understanding of the interior framework of Fangzheng Fault-Depression can be summarized to be that it is zonated transversely with the Yihantong fault being a boundary, and divided into three segments longitudinally. The sedimento-tectonic evolution in the Paleogene, separated into four periods, namely,the faulting period （Paleocene-Eocene）, the compression and uplifting period （end of the Eocene） , the differential subsidence period （Oligocene） and the inversion period （end of the Paleogene）, is recon- structed, which indicates that the east belt of the fault-depression, characterized with deeper subsidence and better developed strata, should be a new and important field for the future oil-gas exploration.

关 键 词：黑龙江省 方正断陷 断裂构造 沉积-构造演化 古近纪 

分 类 号：P54[天文地球—构造地质学]