泥巴山断裂带新构造现象及其意义  

Characteristics and Significance of New Geological Tectonic Activities in Niba Mountain Fault Zone

作　　者：邓荣贵[1] 钟志彬 王文坡 王园园[1] 张晋 刘远程 DENG Ronggui;ZHONG Zhibin;WANG Wenpo;WANG Yuanyuan;ZHANG Jin;LIU Yuancheng(School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,China;College of Environment and Civil Engineering,Chengdu University of Technology,Chengdu 610059,China)

机构地区：[1]西南交通大学土木工程学院,四川成都610031 [2]成都理工大学环境与土木工程学院,四川成都610059

出　　处：《西南交通大学学报》2024年第6期1457-1468,共12页Journal of Southwest Jiaotong University

基　　金：国家自然科学基金项目(41272321,51808458)。

摘　　要：在京昆高速公路雅安至西昌段泥巴山隧道场地区构造地质测绘中发现了新的地质构造现象,为论证泥巴山断裂带性质和新构造现象的区域地质构造意义,采用石英颗粒形态扫描、地质力学与岩体力学原理和数值模拟分析方法.首先,阐述泥巴山隧道场地区的工程地质环境和新构造现象;然后,论述泥巴山断裂带边界断层和区域构造的活动性;其次,对新构造现象的区域地质构造意义进行探讨;最后,利用数值模拟分析论证新构造现象的存在性和区域构造新格架证据的合理性.结果表明:泥巴山断裂带具有明显的新构造活动特征;新构造变形现象所属的泥巴山断裂带与川西“Y”字型活动构造带中的鲜水河活动断裂带有成因上的同根性,是鲜水河断裂带的东南延伸部分;泥巴山断裂带及其东南延伸断裂(峨边—马边—雷波段)与川西“Y”字型活动构造带构成了原生性的类“X”型构造模式,并具有孕育中强震活动的条件.New geological phenomena have been found in the structural geological mapping of Niba Mountain tunnel field of Ya’an to Xichang section of Beijing−Kunming Expressway.To demonstrate the nature of the Niba Mountain fault zone and new tectonic phenomena of regional geological tectonic significance,using quartz particle morphology scan,geological mechanics and rockmass mechanics theory and numerical simulation analysis method,first elaborated the area of Niba Mountain tunnel engineering geological environment and the new tectonic phenomena,and then discusses the Niba Mountain fault zone boundary faults and tectonic activity,Secondly,the regional geological tectonic significance of the neotectonic phenomenon is discussed.Finally,the existence of the neotectonic phenomenon and the rationality of the evidence of the regional tectonic new framework are demonstrated by numerical simulation analysis.The results show that:1)the Niba Mountain fault zone has obvious neotectonic activity characteristics;2)the Niba Mountain fault zone to which the new tectonic deformation phenomenon belongs has genetic homology with the Xianshuihe active fault zone in the“Y”shaped active tectonic zone in western Sichuan,which is the southeast extension of the Xianshuihe fault zone;3)the Niba Mountain fault zone and its southeastern extension fault(Ebian−Mabian−Leibo segment)and the“Y”shaped active tectonic zone in western Sichuan constitute the original“X”type tectonic model,and have the conditions for the breeding of moderate and strong earthquake activities.

关 键 词：泥巴山 新构造现象 活动构造 断裂带 

分 类 号：P546[天文地球—构造地质学]