秦王川盆地西缘断裂活动性综合研究及盆地成因分析
|
摘要
秦王川盆地西缘断裂发育于陇中盆地地震构造区内部,本文对其进行了综合研究。浅层人工地震探测表明,该断裂在最小埋深130m处有显示,联合钻探结果表明该深度处为新近纪湖相沉积地层,泥岩层顶面向盆地方向呈斜坡状,槽探未揭露出断层。综合研究表明该断裂发育在新近纪地层内部,并未上穿第四纪沉积物,属于前第四纪隐伏断层。秦王川盆地在古近纪—新近纪山间泛湖盆的基础上,由于区域构造应力不均匀挤压抬升,形成山间负向地形,成为第四纪多变环境下河流堆积的拗陷盆地。秦王川盆地西缘断裂不具有控制中强地震空间分布的作用和形成地表破裂的能力,对盆地的构造稳定性不构成影响,亦不影响兰州新区的规划发展。
The western margin fault of Qinwangchuan basin can be regarded as interior fracture of the seismotectonic province of Longzhong basin.Taking the seismic microzoning of Lanzhou New Area as an opportunity,the authors made a comprehensive research on the western margin fault of Qinwangchuan basin.The results showed that in the 130 m depth of the upper breakpoint of the fault is fonnd in the Neogene lacustrine strata by shallow seismic exploration and joint drilling,the roof of the mudstone trends in the direction of the Qinwangchuan basin too.The Baojiayao trench reveals no fault eviclerce near surface.Comprehensive research shows that the fault developed in the Neogene strata and did not cut upward the Quaternary sediments through.The western margin fault of Qinwangchuan basin is belongs to the buried fault of the former Quaternary.The Qinwangchuan basin was formed on the basic of the negative terrain among the mountains and had become a changeable fluvial-deposited depression basin in the Quaternary period,due to the regional tectonic stress differentiated compression and uplifting after the E-N intermountain Pan-lake Period environment.It could have no the function to control the spatial distribution of mid-strong earthquakes and the ability to form the surface rupture along the western margin fault of Qinwangchuan basin.Meanwhile,the tectonic stability of the Qinwangchuan basin and planning and development of Lanzhou New Area are not affected.
The western margin fault of Qinwangchuan basin can be regarded as interior fracture of the seismotectonic province of Longzhong basin.Taking the seismic microzoning of Lanzhou New Area as an opportunity,the authors made a comprehensive research on the western margin fault of Qinwangchuan basin.The results showed that in the 130 m depth of the upper breakpoint of the fault is fonnd in the Neogene lacustrine strata by shallow seismic exploration and joint drilling,the roof of the mudstone trends in the direction of the Qinwangchuan basin too.The Baojiayao trench reveals no fault eviclerce near surface.Comprehensive research shows that the fault developed in the Neogene strata and did not cut upward the Quaternary sediments through.The western margin fault of Qinwangchuan basin is belongs to the buried fault of the former Quaternary.The Qinwangchuan basin was formed on the basic of the negative terrain among the mountains and had become a changeable fluvial-deposited depression basin in the Quaternary period,due to the regional tectonic stress differentiated compression and uplifting after the E-N intermountain Pan-lake Period environment.It could have no the function to control the spatial distribution of mid-strong earthquakes and the ability to form the surface rupture along the western margin fault of Qinwangchuan basin.Meanwhile,the tectonic stability of the Qinwangchuan basin and planning and development of Lanzhou New Area are not affected.
引文
柴炽章,孟广魁,杜鹏等,2006.隐伏活动断层的多层次综合探测--以银川隐伏活动断层为例.地震地质,28(4):536-546.
邓起东,徐锡伟,张先康等,2003.城市活断层探测的方法和技术.地学前缘,10(1):150-162.
邓起东,卢造勋,杨主恩,2007.城市活动断层探测和断层活动性评价问题.地震地质,29(2):189-200.
高孟潭,2015.GB 18306-2015《中国地震动参数区划图》宣贯教材.北京:中国质检出版社,中国标准出版社.
韩飞,2009.兰州地区晚第三纪沉积序列的磁性地层与古环境意义.兰州:兰州大学.
雷启云,柴炽章,孟广魁等,2008.银川隐伏断层钻孔联合剖面探测.地震地质,30(1):250-263.
李吉均,方小敏,马海洲等,1996.晚新生代黄河上游地貌演化与青藏高原隆起.中国科学(D辑),26(4):316-322.
刘池洋,王建强,赵红格等,2015.沉积盆地类型划分及其相关问题讨论.地学前缘,22(3):1-26.
刘小凤,袁道阳,刘百篪,2003.兰州及邻近地区河流阶地变形特征.西北地震学报,25(2):119-124,142.
刘兴旺,袁道阳,2012.兰州庄浪河阶地差分GPS测量与构造变形分析.西北地震学报,34(4):393-397,404.
宋博文,徐亚东,梁银平等,2014.中国西部新生代沉积盆地演化.地球科学-中国地质大学学报,39(8):1035-1051.
袁道阳,杨斌,周俊喜等,2000.兰州秦王川盆地形成和演化特征的初步研究.西北地震学报,22(3):296-300.
袁道阳,刘百篪,张培震等,2002.兰州庄浪河断裂带的新构造变形与地震活动.地震学报,24(4):441-444.
袁道阳,张培震,刘百篪等,2004.青藏高原东北缘晚第四纪活动构造的几何图像与构造转换.地质学报,78(2):270-278.
张克信,王国灿,骆满生等,2010.青藏高原新生代构造岩相古地理演化及其对构造隆升的响应.地球科学-中国地质大学学报,35(5):697-712.
张鹏,敖红,安芷生,2016.陇中盆地古近纪-新近纪地层学与古气候学研究进展.地球环境学报,7(2):97-120.
张向红,杨斌,周俊喜等,2000.兰州中川民用机场扩建工程场地隐伏活断层探测研究.西北地震学报,22(4):458-464.
张炎,孙东怀,韩飞等,2010.兰州地区新近纪地层的沉积相与古环境记录.沉积学报,28(3):611-619.
中国地震局,2009.DB/T 15-2009活动断层探测.北京:地震出版社
中华人民共和国国家标准.2005.工程场地地震安全性评价(GB 17741-2005).北京:中国标准出版社.
周本刚,陈国星,高战武等,2013.新地震区划图潜在震源区划分的主要技术特色.震灾防御技术,8(2):113-124.
朱金芳,黄宗林,徐锡伟等,2005.福州市活断层探测与地震危险性评价.中国地震,21(1):1-16.
邓起东,徐锡伟,张先康等,2003.城市活断层探测的方法和技术.地学前缘,10(1):150-162.
邓起东,卢造勋,杨主恩,2007.城市活动断层探测和断层活动性评价问题.地震地质,29(2):189-200.
高孟潭,2015.GB 18306-2015《中国地震动参数区划图》宣贯教材.北京:中国质检出版社,中国标准出版社.
韩飞,2009.兰州地区晚第三纪沉积序列的磁性地层与古环境意义.兰州:兰州大学.
雷启云,柴炽章,孟广魁等,2008.银川隐伏断层钻孔联合剖面探测.地震地质,30(1):250-263.
李吉均,方小敏,马海洲等,1996.晚新生代黄河上游地貌演化与青藏高原隆起.中国科学(D辑),26(4):316-322.
刘池洋,王建强,赵红格等,2015.沉积盆地类型划分及其相关问题讨论.地学前缘,22(3):1-26.
刘小凤,袁道阳,刘百篪,2003.兰州及邻近地区河流阶地变形特征.西北地震学报,25(2):119-124,142.
刘兴旺,袁道阳,2012.兰州庄浪河阶地差分GPS测量与构造变形分析.西北地震学报,34(4):393-397,404.
宋博文,徐亚东,梁银平等,2014.中国西部新生代沉积盆地演化.地球科学-中国地质大学学报,39(8):1035-1051.
袁道阳,杨斌,周俊喜等,2000.兰州秦王川盆地形成和演化特征的初步研究.西北地震学报,22(3):296-300.
袁道阳,刘百篪,张培震等,2002.兰州庄浪河断裂带的新构造变形与地震活动.地震学报,24(4):441-444.
袁道阳,张培震,刘百篪等,2004.青藏高原东北缘晚第四纪活动构造的几何图像与构造转换.地质学报,78(2):270-278.
张克信,王国灿,骆满生等,2010.青藏高原新生代构造岩相古地理演化及其对构造隆升的响应.地球科学-中国地质大学学报,35(5):697-712.
张鹏,敖红,安芷生,2016.陇中盆地古近纪-新近纪地层学与古气候学研究进展.地球环境学报,7(2):97-120.
张向红,杨斌,周俊喜等,2000.兰州中川民用机场扩建工程场地隐伏活断层探测研究.西北地震学报,22(4):458-464.
张炎,孙东怀,韩飞等,2010.兰州地区新近纪地层的沉积相与古环境记录.沉积学报,28(3):611-619.
中国地震局,2009.DB/T 15-2009活动断层探测.北京:地震出版社
中华人民共和国国家标准.2005.工程场地地震安全性评价(GB 17741-2005).北京:中国标准出版社.
周本刚,陈国星,高战武等,2013.新地震区划图潜在震源区划分的主要技术特色.震灾防御技术,8(2):113-124.
朱金芳,黄宗林,徐锡伟等,2005.福州市活断层探测与地震危险性评价.中国地震,21(1):1-16.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |