The Features of Seismite in Jiyang Sub-Basin,Paleogene

YANG Jian-ping; WANG Hui; CHEN Shi-yue; YUAN Jing; YAN Ji-hua; ZHAO Wei-wei

By the observation of drillng cores, the seismite is recognized which mainly occurredin the upper part of Member4 and Member 3 of Shahejie Formation inthe Lower Tertiary in Jiyang sub-basin. Many kinds of soft sedimentarydeformation structures have been found in seismite, such as step micro-faults, pleatedwithin layers,liquefactionsandstone and clay veins, vibrationalliquefaction deformation structure, seismic breccias and flame structure. Seismites mainly occur in the northern steep zoneof rift lacustrine basin. There develop more seismites in Member 3 than in the upper part of Member4. Away from the basin-controlling boundary fault, the sedimentary sequence integrity of seismites gets worse. This reflects that seismites are the direct resultsof earthquake which causedby the intenseactionof basin-controlling boundary fault .The repeated emergence of seismites in stratasection showsthat themovement of boundary faultshas periodicity and episodicity. The researchprovides theoretical foundation for the tectonic evolution studies and seismite recognization in continental rift lacustrine basin.

University of Petroleum,Dongying Shandong 257061

Received Date: 2003-04-25

Rev Recd Date: 2003-07-07

Publish Date: 2004-06-10

Key words:

seismite /
soft sedimentary deformation structure /
seismite sequence /
distinguishing mark /
Paleogene /
Jiyang sub-basin

Abstract: By the observation of drillng cores, the seismite is recognized which mainly occurredin the upper part of Member4 and Member 3 of Shahejie Formation inthe Lower Tertiary in Jiyang sub-basin. Many kinds of soft sedimentarydeformation structures have been found in seismite, such as step micro-faults, pleatedwithin layers,liquefactionsandstone and clay veins, vibrationalliquefaction deformation structure, seismic breccias and flame structure. Seismites mainly occur in the northern steep zoneof rift lacustrine basin. There develop more seismites in Member 3 than in the upper part of Member4. Away from the basin-controlling boundary fault, the sedimentary sequence integrity of seismites gets worse. This reflects that seismites are the direct resultsof earthquake which causedby the intenseactionof basin-controlling boundary fault .The repeated emergence of seismites in stratasection showsthat themovement of boundary faultshas periodicity and episodicity. The researchprovides theoretical foundation for the tectonic evolution studies and seismite recognization in continental rift lacustrine basin.

HTML

Reference (13)

[1]	杜远生,韩欣. 论震积作用和震积岩. 地球科学进展,2000,15(4):389～394[Du Yuansheng, Han Xin. Seismoeismo-deposition and Seismites. Advance in Earth Sciences, 2000, 15(4): 389～394]
[2]	吴贤涛,尹国勋. 四川峨眉晚侏罗世湖泊沉积中震积岩的发现及其意义. 沉积学报,1992,10(3):19～24 [Wu Xiantao, Yin Guoxun. Discovery of seismite and its significance of the Late Jura lacustrine deposit in Emei, Sichuan province. Acta Sedimentologica Sinica, 1992, 10(3): 19～24]
[3]	Rodriguez-Pascua M A, Calvo J P, De Vicente D, Gomez-Gras D. Soft sediment deformation structures interpreted as seismites in lacustrine sediments of the Prebetic Zone, SE Spain, and their potential use as indicators of earthquake magnitudes during the Late Miocene. Sedimentary Geology, 2000, 135(1～4):117～135
[4]	Fairchild I J, Einsele G, Song T. Possible seismic origin of molar tooth structures in Neoproterozoic carbonate ramp deposits, north China. Sedimentology, 1997, 44(4): 611～630
[5]	Seilacher A. Fault-graded beds interpreted as seismites. Sedimentology, 1969, 13(1/2): 155～159
[6]	Seilacher A. Sedimentary structures tentatively attributed to seismic events. Marine Geology, 1984, 55(1): 1～12
[7]	Frank T D, Lyons T W. "Molar- tooth" structures, a geochemical perspective on a Proterozoic enigma. Geology,1998, 26(8): 683～686
[8]	宋天锐,和政军,丁孝忠,等.北京十三陵前寒武纪碳酸盐岩地层中的一套可能的地震-海啸序列. 科学通报,1988, 38(8): 609～611 [Song Tianrui, He Zhengjun, Ding Xiaozhong, et al. A study of geological event records in the Proterozoic Chuanlinggou Formation of Ming tombs District, Beijing. Geological Review, 2000,46(4):400～406]
[9]	乔秀夫,宋天锐,高林志,等. 碳酸盐岩振动液化地震序列. 地质学报,1994,68(1):16～32[Qiao Xiufu, Song Tianrui, Gao Linzhi, et al. Seismic sequence in carbonate rocks by vibrational liquefaction. Acta Geologica Sinica, 1994, 68 (1): 16～32]
[10]	乔秀夫,李海兵,高林志. 华北地台震旦纪-早古生代地震节律.地学前缘,1997,4(3～4):155～160 [Qiao Xiufu, Li Haibing, Gao Linzhi. Sinian-early paleozoic seismic rhythms on the north China platform. Earth Science Frontiers, 1997, 4(3～4): 155～160 ]
[11]	乔秀夫. 中朝板块元古宙板内地震带与盆地格局.地学前缘,2002,9(3):141～149 [Qiao Xiufu. Intraplate Seismic belt and basin framework of sino-korean plate in proterozoic. Earth Science Frontiers, 2002, 9(3): 141～149]
[12]	乔秀夫,高林志,彭阳, 等. 古郯芦带沧浪铺节地震事件、层序及构造意义. 中国科学(D辑), 2001,31(11):910～918[Qiao Xiufu, Gao Linzhi, Peng Yang, et al. Seismic event, sequence and tectonic significance in Canglangpu stage in paleo-tanlu fault zone. Science in China (series D), 2001, 31(11): 910～918]
[13]	周晓东,陈跃军. 吉南地区晚震旦世震积岩特征. 吉林地质,1998,17(9):24～29 [Zhou Xiaodong, Chen Yuejun. The lates sinian seismic depositional rock characteristics in the southern part of Jilin province. Jilin Geology, 1998, 17(9): 24～29]

The Features of Seismite in Jiyang Sub-Basin,Paleogene

Abstract

References

Proportional views

通讯作者: 陈斌, bchen63@163.com

Article Metrics

Proportional views

Related