鲁中寒武系馒头组震积岩的发现及初步研究
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摘要
近几年在鲁中不同地区发现馒头组石店段中均有震积岩产出。震积岩形成于干燥的潮坪澙湖环境,发育在下寒武统的上部。它们具有记录强地震事件的泄水构造(地震成因泥晶脉)、液化卷曲变形、阶梯状小断裂、层内错断和液化网状裂纹等层内构造的特征。本文通过地层综合对比,论证了不同地区震积岩的等时性。认为:鲁中早寒武世末有一个地震活跃期;地震序列属乔秀夫(1994,2001a)提出的碳酸盐岩振动液化地震序列的原地系统;震积岩分布范围是约在510Ma前,以古郯庐带为震中的强地震之7～11度烈度区。为区别于张增奇(1996)提出的鲁中新元古代石旺庄期地震事件层,将此地震成因地层名之为馒头期地震事件层。
Seismites of the Shidian Member of the Cambrian Mantou Formation have been found in different areas of the central Shandong Province in recent years. They were formed in a dry tidal flat lagoon environment, and developed in the upper part of the Lower Cambrian. They have the characteristics of intra-layer structures recording strong seismic events, such as the escaped structure of water (seismogenic micrite vein) , liquefied fold deformation, micro-fault-graded and net-like cracks etc. Through a comprehensive correlation of the strata, the isochroneity of seiemites in different areas is proved in the paper. It is considered that there was a seismic active period at the end of the Early Cambrian in the central Shandong area. The seismic sequence belongs to the original position system of the vibrational liquefaction seismic sequence in carbonate rocks put forward by Qiao Xiufu(1994, 2001a), and the distribution of the seismites was in a region of earthquake intensity of 7-11 degree caused by some strong palaeo-earthquakes about 510 Ma ago, with the palaeo-Tancheng-Lujiang fault zone as the seismic center. In order to be distinguished from the seismic event bed of the Neoproterozoic Shiwangzhuang Period in the central Shandong area, this earthquake-genetic stratum is temporarily named the seismic event bed of the Mantou Period.
Seismites of the Shidian Member of the Cambrian Mantou Formation have been found in different areas of the central Shandong Province in recent years. They were formed in a dry tidal flat lagoon environment, and developed in the upper part of the Lower Cambrian. They have the characteristics of intra-layer structures recording strong seismic events, such as the escaped structure of water (seismogenic micrite vein) , liquefied fold deformation, micro-fault-graded and net-like cracks etc. Through a comprehensive correlation of the strata, the isochroneity of seiemites in different areas is proved in the paper. It is considered that there was a seismic active period at the end of the Early Cambrian in the central Shandong area. The seismic sequence belongs to the original position system of the vibrational liquefaction seismic sequence in carbonate rocks put forward by Qiao Xiufu(1994, 2001a), and the distribution of the seismites was in a region of earthquake intensity of 7-11 degree caused by some strong palaeo-earthquakes about 510 Ma ago, with the palaeo-Tancheng-Lujiang fault zone as the seismic center. In order to be distinguished from the seismic event bed of the Neoproterozoic Shiwangzhuang Period in the central Shandong area, this earthquake-genetic stratum is temporarily named the seismic event bed of the Mantou Period.
引文
陈晋镳,武铁山,张鹏远,游文澄.1997． 华北区区域地层. 武汉;中国地质大学出版社,4～63．
杜远生,龚淑云,韩欣,王家生,顾松竹,林文姣.2001． 北祁连玉门旱峡一带志留系震积岩及其构造意义.地质学报(英文版),75(4) ;385～390．
冯先岳.1989． 地震振动液化变形研究.内陆地震,3(4) :209～307．
刘颖,谢君斐。1989． 砂土振动液化.北京:地质出版社,1～327．
刘光华.1987、 豫西禹县大风口一带晚石炭世碳酸盐岩风暴沉积特征与类型.地质评论,33(3) :249～254．
乔秀夫,宋天锐,高林志,彭阳,李海兵,宋彪,张巧大.1994． 碳酸盐岩振动液化地震序列.地质学报,68(1) :16～29．
乔秀夫,宋天锐,李海兵,高林志.1996a.辽东半岛南部震旦系一下寒武统成因地层.北京;科学出版社,9～53;128～137
乔秀夫,季强,高林志,章雨旭,高振家.1996b.北中国板块东部震旦系对比.中国区域地质,1996(2) :135～142．
乔秀夫.1996c.中国震积岩的研究与展望.地质论评,42(4) ;317～320．
乔秀夫,高林志,彭阳,章雨旭.1997． 内蒙古腮林忽洞群综合地层和白云鄂博矿床赋矿微晶丘.地质学报,71(3) :202～211．
乔秀夫,高林志,彭阳.200la.古郯庐带新元古界-灾变·层序·生物.北京:地质出版社,12～26．
乔秀夫,高林志,彭阳,李海兵.2001b.古郯庐带沧浪铺阶地震事件、层序及构造意义.中国科学(D)辑,31(11) :911～918．
山东省地质矿产局.1982． 山东省区域地质志.北京:地质出版社,97～103．
张增奇,刘明渭.1996． 山东省岩石地层.武汉:中国地质大学出版社,103～1043;109～166．
Bureau of Geology and Mineral Resources of Shangdong Province.1982． Regional Geology of Shangdong Province. Beijing:Geological Publishing House, 97～103(in Chinese).
Chen Jinbiao, Wu Tieshan, Zhang Pengyuan, You Wencheng. 1997． Regional Stratigraphy of North China. Wuhan: China University of Geosciences Press 4～63(in Chinese).
Du Yuansheng, Gong Shuyun, Han Xin, Wang Jiasheng, Gu Songzhu, Lin Wenjiao. 2001． Silurian seismites in Hanxia,Yumen, north Qilian Mountains, and their tectonic significance.Acta Geologica Sinica(English Edition), 75(4) : 385～390．
Liu Guanghua. 1987． The features and types of the Late Carboniferous Carbonate tempestites in the Dafengkou area, Yuxian, Western Henan. Geological Review, 33(3) : 249～254(in Chinese with English abstract).
Liu Ying, Xie Junwen. 1989． Vibrational liquefaction of sand soil.Beijing: Seismological Press, l～327(in Chinese).
Qiao Xiufu, Song Tianrui, Gao Linzhi, Peng Yang, Li Haibing, Gao Mai, Song Biao, Zhang Qiaoda. 1994． Seismic sequence in carbonate rocks by vibrational liquefaction. Acta Geologica Sinica,68(1) : 16～29 (in Chinese with English abstract).
Qiao Xiufu, Song Tianrui, Li Haibing, Gao Linzhi. 1996a. Genetic stratigraphy of the Sinian and Lower Cambrian strata in South Liaoning Province. Beijing: Science Press, 9～53;128～137(in Chinese).
Qiao Xiufu, Ji Qiang, Gao Linzhi, Zhang Yuxu, Gao Zhenjia. 1996b.Stratigraphic correlation of the Sinian in the eastern part of the Northern China Plate. Regional Geology of China, (2) :135～142(in Chinese with English abstract).
Qiao Xiufu. 1996c. Study of Seismites of China and its Prospects.Geological Review,42(4) : 317～320 (in Chinese with English abstract).
Qiao Xiufu, Gao Linzhi, Peng Yang, Zhang Yuxu. 1997． Composite stratigraphy of the Sailinhuodong Group and ore-bearing micrite mound in the Bayan Obo deposit, Inner Mongolia, China. Acta Geologica Sinica, 71(3) : 202～211(in Chinese with English abstract).
Qiao Xiufu, Gao Linzhi, Peng Yang. 2001a. Neoproterozoic in Paleo-Tancheng-Lujiang Fault Zone-Catastrophe·Sequences·Biostratigraphy. Beijing: Geological Publishing House,12～26 (in Chinese).
Qiao Xiufu, Song Tianrui, Gao Linzhi, Peng Yang, Li Haibing.2001b. Seismic events, sequence and significance in Canglangpu Stage in Paleo-Tanlu Fault Zone. Science in China(Series D), 31(11) : 911～917(in Chinese).
Zhang Zengqi, Liu Mingwei. 1996． Stratigraphy(Lithostratic) of Shandong Province. Wuhan: China University of Geoseiences Press. 103～104; 109～166 (in Chinese).
杜远生,龚淑云,韩欣,王家生,顾松竹,林文姣.2001． 北祁连玉门旱峡一带志留系震积岩及其构造意义.地质学报(英文版),75(4) ;385～390．
冯先岳.1989． 地震振动液化变形研究.内陆地震,3(4) :209～307．
刘颖,谢君斐。1989． 砂土振动液化.北京:地质出版社,1～327．
刘光华.1987、 豫西禹县大风口一带晚石炭世碳酸盐岩风暴沉积特征与类型.地质评论,33(3) :249～254．
乔秀夫,宋天锐,高林志,彭阳,李海兵,宋彪,张巧大.1994． 碳酸盐岩振动液化地震序列.地质学报,68(1) :16～29．
乔秀夫,宋天锐,李海兵,高林志.1996a.辽东半岛南部震旦系一下寒武统成因地层.北京;科学出版社,9～53;128～137
乔秀夫,季强,高林志,章雨旭,高振家.1996b.北中国板块东部震旦系对比.中国区域地质,1996(2) :135～142．
乔秀夫.1996c.中国震积岩的研究与展望.地质论评,42(4) ;317～320．
乔秀夫,高林志,彭阳,章雨旭.1997． 内蒙古腮林忽洞群综合地层和白云鄂博矿床赋矿微晶丘.地质学报,71(3) :202～211．
乔秀夫,高林志,彭阳.200la.古郯庐带新元古界-灾变·层序·生物.北京:地质出版社,12～26．
乔秀夫,高林志,彭阳,李海兵.2001b.古郯庐带沧浪铺阶地震事件、层序及构造意义.中国科学(D)辑,31(11) :911～918．
山东省地质矿产局.1982． 山东省区域地质志.北京:地质出版社,97～103．
张增奇,刘明渭.1996． 山东省岩石地层.武汉:中国地质大学出版社,103～1043;109～166．
Bureau of Geology and Mineral Resources of Shangdong Province.1982． Regional Geology of Shangdong Province. Beijing:Geological Publishing House, 97～103(in Chinese).
Chen Jinbiao, Wu Tieshan, Zhang Pengyuan, You Wencheng. 1997． Regional Stratigraphy of North China. Wuhan: China University of Geosciences Press 4～63(in Chinese).
Du Yuansheng, Gong Shuyun, Han Xin, Wang Jiasheng, Gu Songzhu, Lin Wenjiao. 2001． Silurian seismites in Hanxia,Yumen, north Qilian Mountains, and their tectonic significance.Acta Geologica Sinica(English Edition), 75(4) : 385～390．
Liu Guanghua. 1987． The features and types of the Late Carboniferous Carbonate tempestites in the Dafengkou area, Yuxian, Western Henan. Geological Review, 33(3) : 249～254(in Chinese with English abstract).
Liu Ying, Xie Junwen. 1989． Vibrational liquefaction of sand soil.Beijing: Seismological Press, l～327(in Chinese).
Qiao Xiufu, Song Tianrui, Gao Linzhi, Peng Yang, Li Haibing, Gao Mai, Song Biao, Zhang Qiaoda. 1994． Seismic sequence in carbonate rocks by vibrational liquefaction. Acta Geologica Sinica,68(1) : 16～29 (in Chinese with English abstract).
Qiao Xiufu, Song Tianrui, Li Haibing, Gao Linzhi. 1996a. Genetic stratigraphy of the Sinian and Lower Cambrian strata in South Liaoning Province. Beijing: Science Press, 9～53;128～137(in Chinese).
Qiao Xiufu, Ji Qiang, Gao Linzhi, Zhang Yuxu, Gao Zhenjia. 1996b.Stratigraphic correlation of the Sinian in the eastern part of the Northern China Plate. Regional Geology of China, (2) :135～142(in Chinese with English abstract).
Qiao Xiufu. 1996c. Study of Seismites of China and its Prospects.Geological Review,42(4) : 317～320 (in Chinese with English abstract).
Qiao Xiufu, Gao Linzhi, Peng Yang, Zhang Yuxu. 1997． Composite stratigraphy of the Sailinhuodong Group and ore-bearing micrite mound in the Bayan Obo deposit, Inner Mongolia, China. Acta Geologica Sinica, 71(3) : 202～211(in Chinese with English abstract).
Qiao Xiufu, Gao Linzhi, Peng Yang. 2001a. Neoproterozoic in Paleo-Tancheng-Lujiang Fault Zone-Catastrophe·Sequences·Biostratigraphy. Beijing: Geological Publishing House,12～26 (in Chinese).
Qiao Xiufu, Song Tianrui, Gao Linzhi, Peng Yang, Li Haibing.2001b. Seismic events, sequence and significance in Canglangpu Stage in Paleo-Tanlu Fault Zone. Science in China(Series D), 31(11) : 911～917(in Chinese).
Zhang Zengqi, Liu Mingwei. 1996． Stratigraphy(Lithostratic) of Shandong Province. Wuhan: China University of Geoseiences Press. 103～104; 109～166 (in Chinese).
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