美姑河断裂活动性研究及对水电工程影响评价
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摘要
美姑河断裂带穿越拟建的美姑河瓦洛水电站,其展布及活动性直接影响工程建设。通过地貌、第四系、地质构造及地震等野外地质调查和断裂带石英形貌扫描、ESR测年等方法综合研究表明,美姑河断裂带是由3条断层组成的叠瓦断层带,在中更新世(Q2)以来已不具活动性,不属于活动断层,亦不具有诱发地震的能力,因此断裂带活动性对工程建设影响不大。
Meigu River fracture zone goes through Waluo hydropower station which is planned to built,so the distribution and activity of Meigu River fracture zone directly effect the project construction.With the methods of investigation which includes physiognomy,quaternary,tectonic and earthquake,the quartz shape scanning in the fracture zone and ESR dating,we draw a conclusion that Meigu River fracture zone is composed of three imbricate faults,which has not been active since the middle Pleistocene,and it is not an active fracture zone as well as has no ability to induce an earthquake.So the fracture zone has little effect on the project construction.
Meigu River fracture zone goes through Waluo hydropower station which is planned to built,so the distribution and activity of Meigu River fracture zone directly effect the project construction.With the methods of investigation which includes physiognomy,quaternary,tectonic and earthquake,the quartz shape scanning in the fracture zone and ESR dating,we draw a conclusion that Meigu River fracture zone is composed of three imbricate faults,which has not been active since the middle Pleistocene,and it is not an active fracture zone as well as has no ability to induce an earthquake.So the fracture zone has little effect on the project construction.
引文
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[13]汪明武,章杨松,李丽,等.应用断层泥石英形貌测龄评价桥基断裂活动性[J].合肥工业大学学报,2002,25(3):335-339.
[14]计凤桔,李建平,刘明达.活断层研究中年代测定的若干问题之商榷[C]//中国活动断裂研究.北京:地震出版社,1994:232-239.
[15]钟康惠,梁兴中,刘肇昌,等.藏东三江构造带云南段石英热活化ESR测年与新生代构造事件[J].地质通报,2004,12(23):1232-1236.
[16]林敏,贾丽.ESR测年中人工辐照吸收剂量的确定[J].地震地质,2005,27(4):698-705.
[2]全国地层委员会.中国地层指南及中国地层指南说明书[M].修订版.北京:地质出版社,2001:42-44.
[3]四川地质局第一区域地质测量队.冕宁幅1:20万区调说明书[M].北京:地质出版社,1967:90-94.
[4]四川地质局第一区域地质测量队.雷波幅1:20万区调说明书[M].北京:地质出版社,1972:80-100.
[5]朱志澄.逆冲推覆构造[M].2版.武汉:中国地质大学出版社,1991:11-30.
[6]吴运高,李继亮,樊敬亮.造山带逆冲推覆构造研究的主要新进展[J].地球科学进展,2000,15(4):426-433.
[7]Dahlen F A.critical tapermodel of fold-and thrust beltsand accretionary wedges[J].Annual Reviews of PlanetarySciences,1990,18:99.
[8]Mosar J,Supper J.Role of shear in fault-propagationfolding[C]//Mcclay K R ed.Thrust tectonics.London:Chapman and Hall,1992:123-132.
[9]Boyer S E.Geometric for synchronous trussing in thesouthern Alberta and northeast Montana thrust belt[C]//Mcclay K R.Thrust tectonics.London:Chapman andHall,1992:377-390.
[10]Epard J L,Escher A.Transition from basement to cover:agemetric model[J].J.Struct.Geol.,1996,18(5):533-548.
[11]Eshcer A.Beaumont C.Formation,burial andexhumation of basement nappes at crustal scale:Ageometric model based on the western Swiss-Italian Alps[J].J.Struct.Geol.,1997,19(7):955-974.
[12]中国地震局地壳应力研究所.美姑河瓦洛水电站工程场地地震安全性评估报告[R].北京:中国地震局地壳应力研究所,2004.
[13]汪明武,章杨松,李丽,等.应用断层泥石英形貌测龄评价桥基断裂活动性[J].合肥工业大学学报,2002,25(3):335-339.
[14]计凤桔,李建平,刘明达.活断层研究中年代测定的若干问题之商榷[C]//中国活动断裂研究.北京:地震出版社,1994:232-239.
[15]钟康惠,梁兴中,刘肇昌,等.藏东三江构造带云南段石英热活化ESR测年与新生代构造事件[J].地质通报,2004,12(23):1232-1236.
[16]林敏,贾丽.ESR测年中人工辐照吸收剂量的确定[J].地震地质,2005,27(4):698-705.
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