云南禄劝县皎西乡土壤氡测量在易门-罗茨隐伏断裂研究中的应用
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摘要
易门-罗茨断裂带是多期活动的大规模断裂带,以易门-罗茨断裂为主断裂。在禄劝县皎西一带,断裂带控制了南北向的串珠状第四系盆地,盆地内第四纪沉积物厚数米至数十米,主要的控盆隐伏断裂位置、特征难以确定。采用地质调查与土壤氡测量相结合的方法,查明了区内控盆隐伏断裂的位置、产状、宽度等。调查结果与地貌和区域构造特征吻合较好,因此认为,土壤氡测量适用于山间盆地内隐伏活动断裂的调查。
Yimen-Luoci fault is the main fault of the Yimen-Luoci faulted belt, which is characterized by large scale multistage activities. It is difficult to determine the location and features of the basin-controlling fault due to the fact that loose sediments several to tens of meters in thickness are widely spread over the NS-trending beaded-like Quaternary basins, controlled by Yimen-Luoci faulted belt in Jiaoxi Town, Luquan County, Yunnan Province. The position, width and attitude of the basin-controlling buried fault were found by means of geological survey and gas radon measuring in this study. The measuring result is well consistent with topographical features and regional tectonics, and hence the authors hold that gas radon measuring is suitable for investigation of buried active faults in intermount basin.
Yimen-Luoci fault is the main fault of the Yimen-Luoci faulted belt, which is characterized by large scale multistage activities. It is difficult to determine the location and features of the basin-controlling fault due to the fact that loose sediments several to tens of meters in thickness are widely spread over the NS-trending beaded-like Quaternary basins, controlled by Yimen-Luoci faulted belt in Jiaoxi Town, Luquan County, Yunnan Province. The position, width and attitude of the basin-controlling buried fault were found by means of geological survey and gas radon measuring in this study. The measuring result is well consistent with topographical features and regional tectonics, and hence the authors hold that gas radon measuring is suitable for investigation of buried active faults in intermount basin.
引文
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[2]巫德斌,粟宇,张运达.氡射气测量及地气测量在探测深厚覆盖层下隐伏断裂中的应用[J].四川地质学报,2011,31:110-112.
[3]汪栋,方方,丁卫撑,等.土壤氡浓度日变化影响因素研究[J].物探与化探,2014,38(3):486-489.
[4]吕少辉.隐伏断裂的地气场及其应用研究[D].成都理工大学硕士学位论文,2011.
[5]葛良全,童纯菡,贺振华,等.隐伏断裂上方地气异常特征及其机理研究[J].成都理工学院学报,1997,24(3):30-35.
[6]周斌,李蕾,刘霞,等.土壤氡射气测量在隐伏断裂研究中的应用[J].固体地球物理,山东地球物理六十年, 2009:242-247.
[7]申超,肖德涛,陈凌,等.土壤氡测量方法[J].衡阳师范学院学报,2011,32(3):45-48.
[8]赵桂芝,肖德.土壤氡浓度的测量方法现状[J].核电子学与探测技术,2007,27(3):583-587.
[9]石玉春,倪琦生,吴俊奇,等.用放射性方法研究隐伏断裂构造[J].地球物理学报, 1996, 39(1):134-140.
[10]刘江平,周斌,李庆红.氡射气测量在胜利油田隐伏断裂研究中的应用[J].华北地震科学,2004,22(1):42-45.
[11]吴自香,刘彦兵,贾育新,等.土壤氡测定的影响因素探讨[J].中国辐射卫生,2006,15(1):23-25.