龙门山冲断带滑脱构造变形样式
摘要
龙门山冲断带发育多套滑脱带,如寒武系、志留系、下三叠统嘉陵江组、中三叠统雷口坡组等。通过野外地质调查和地震剖面精细解释,认为在具有滑脱层的构造变形中,滑脱层本身发生强烈的挤压揉皱,使得上下地层发生显著不同的构造变形,深部的构造变形在纵向上形成两个构造体系,其中上部构造变形体系具有强烈的构造变形,形成大量的逆冲断裂带、背冲断块等构造变形样式,而下部构造变形体系则经历较弱的构造变形,地层保存完好,形成分层差异构造变形,地表可以见到特征明显的坡坪式断层、节理发育的断开与连续、逆冲断层的尖灭消失、构造虚脱和弯流褶皱、强烈的褶皱或者揉皱等。
Many detachment layer can be found in Longmen Mountain Thrust Belt,such as Cambrian,Silurian,Lower Triassic Jianglingjiang Formation,Middle Triassic Leikoupo Formation and so on.Through field investigationand seismic explanation,we put forward that the detachment layers have an important effect on the deformation,they can experience intense compression and make the adjacent layer have different deformation styles as well,forexample,the layers below the detachment layer may be preserved well,while the upper layers have intense deformation,such as thrust belt,pop-up.Some important styles can be identified in field investigation,such as slope-flatfault,breaking and continuing of the joints,disappearing of the thrust fault,etc.II Journal of Southwest Petroleum University(Science & Technology Edition) Oct.2011
Many detachment layer can be found in Longmen Mountain Thrust Belt,such as Cambrian,Silurian,Lower Triassic Jianglingjiang Formation,Middle Triassic Leikoupo Formation and so on.Through field investigationand seismic explanation,we put forward that the detachment layers have an important effect on the deformation,they can experience intense compression and make the adjacent layer have different deformation styles as well,forexample,the layers below the detachment layer may be preserved well,while the upper layers have intense deformation,such as thrust belt,pop-up.Some important styles can be identified in field investigation,such as slope-flatfault,breaking and continuing of the joints,disappearing of the thrust fault,etc.II Journal of Southwest Petroleum University(Science & Technology Edition) Oct.2011
引文
[1]汤良杰,杨克明,金文正,等.龙门山冲断带多层次滑脱带与滑脱构造变形[J].中国科学D辑:地球科学,2008,38(增刊I):30–40.
[2]蔡立国,刘和甫.四川前陆褶皱–冲断带构造样式与特征[J].石油实验地质,1997,19(2):115–120.
[3]夏吉文,李凌,罗冰,等.川西南寒武系沉积体系分析[J].西南石油大学学报,2007,29(4):21–25.
[4]王社教,王兰生,黄金亮,等.上扬子区志留系页岩气成藏条件[J].天然气工业,2009,29(5):45–50.
[5]曾德铭,王兴志,张帆,等.四川盆地西北部中三叠统雷口坡组储层研究[J].古地理学报,2007,9(3):253–266.
[6]张健,李国辉,谢继容,等.四川盆地上三叠统划分对比研究[J].天然气工业,2006,26(1):12–15.
[7]李跃纲,廖仕孟,杨跃明,等.川西地区侏罗系浅层气勘探配套技术研究[J].西南石油学院学报,2002,24(6):11–14.
[8]胡晓强,陈洪德,纪相田,等.川西前陆盆地侏罗系三角洲沉积体系与沉积模式[J].石油实验地质,2005,27(3):226–231,237.
[9]张闻林,陈义才,高熙,等.川西北部地区侏罗系气藏成藏特征与川西南部侏罗系气藏比较[J].天然气工业,2007,27(10):15–19.
[10]罗啸泉,郭东晓.川西断裂分布特征与油气的关系[J].西南石油学院学报,2004,26(6):17–20.
[11]孙玮,罗志立,杨荣军,等.关于汶川大地震的几个地质问题[J].新疆石油地质,2009,30(1):124–128.
[12]张致伟,程万正,阮祥,等.汶川8.0级地震前龙门山断裂带的地震活动性和构造应力场特征[J].地震学报,2009,31(2):117–127.
[13]颜丹平,李书兵,曹文涛,等.龙门山多层分层拆离地壳结构:新构造变形与深部构造证据[J].地学前缘,2010,17(5):106–116.
[14]汪新伟,沃玉进,周雁,等.上扬子地区褶皱–冲断带的运动学特征[J].地学前缘,2010,17(3):200–212.
[15]Jia Dong,Li Yiquan,Lin Aiming,et al.Structural modelof 2008 Mw 7.9 Wenchuan earthquake in the rejuvenat-ed Longmen Shan thrust belt,China[J].Tectonophysics,2009,491(1/4):174–184.
[16]闫亮,李勇,周荣军,等.龙门山中央断裂分段地震震级及强震复发周期的预测[J].成都理工大学学报:自然科学版,2011,38(1):29–37.
[17]齐信,唐川,铁永波,等.基于GIS技术的汶川地震诱发地质灾害危险性评价以四川省北川县为例[J].成都理工大学学报:自然科学版,2010,37(2):160–167.
[2]蔡立国,刘和甫.四川前陆褶皱–冲断带构造样式与特征[J].石油实验地质,1997,19(2):115–120.
[3]夏吉文,李凌,罗冰,等.川西南寒武系沉积体系分析[J].西南石油大学学报,2007,29(4):21–25.
[4]王社教,王兰生,黄金亮,等.上扬子区志留系页岩气成藏条件[J].天然气工业,2009,29(5):45–50.
[5]曾德铭,王兴志,张帆,等.四川盆地西北部中三叠统雷口坡组储层研究[J].古地理学报,2007,9(3):253–266.
[6]张健,李国辉,谢继容,等.四川盆地上三叠统划分对比研究[J].天然气工业,2006,26(1):12–15.
[7]李跃纲,廖仕孟,杨跃明,等.川西地区侏罗系浅层气勘探配套技术研究[J].西南石油学院学报,2002,24(6):11–14.
[8]胡晓强,陈洪德,纪相田,等.川西前陆盆地侏罗系三角洲沉积体系与沉积模式[J].石油实验地质,2005,27(3):226–231,237.
[9]张闻林,陈义才,高熙,等.川西北部地区侏罗系气藏成藏特征与川西南部侏罗系气藏比较[J].天然气工业,2007,27(10):15–19.
[10]罗啸泉,郭东晓.川西断裂分布特征与油气的关系[J].西南石油学院学报,2004,26(6):17–20.
[11]孙玮,罗志立,杨荣军,等.关于汶川大地震的几个地质问题[J].新疆石油地质,2009,30(1):124–128.
[12]张致伟,程万正,阮祥,等.汶川8.0级地震前龙门山断裂带的地震活动性和构造应力场特征[J].地震学报,2009,31(2):117–127.
[13]颜丹平,李书兵,曹文涛,等.龙门山多层分层拆离地壳结构:新构造变形与深部构造证据[J].地学前缘,2010,17(5):106–116.
[14]汪新伟,沃玉进,周雁,等.上扬子地区褶皱–冲断带的运动学特征[J].地学前缘,2010,17(3):200–212.
[15]Jia Dong,Li Yiquan,Lin Aiming,et al.Structural modelof 2008 Mw 7.9 Wenchuan earthquake in the rejuvenat-ed Longmen Shan thrust belt,China[J].Tectonophysics,2009,491(1/4):174–184.
[16]闫亮,李勇,周荣军,等.龙门山中央断裂分段地震震级及强震复发周期的预测[J].成都理工大学学报:自然科学版,2011,38(1):29–37.
[17]齐信,唐川,铁永波,等.基于GIS技术的汶川地震诱发地质灾害危险性评价以四川省北川县为例[J].成都理工大学学报:自然科学版,2010,37(2):160–167.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心