滇西大理至瑞丽铁路沿线地温场特征及其工程地质意义
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摘要
在整理、分析云南大理至瑞丽拟建铁路沿线及其邻区现今地温场分布特征的基础上,进一步总结前人的资料,综合研究、探讨了该区地温场与岩浆活动、活动构造、地震活动、区域深部构造的关系。结果表明,该区中高温温泉(中高地温场)的空间分布与地表岩浆岩的出露、地表主要活动断裂带的分布都具有较好的对应关系。综合研究后认为,该区的中高温温泉可归结为岩浆热源型、断裂深循环型和岩浆热源叠加断裂深循环作用型3种基本成因类型。同时还发现,该区的温泉分布与区域地震活动空间上也存在密切的关系,并据此将区内划分为4个地震区带。研究结果表明,本区地表温泉分布所反映出的地温场特征对本区的工程稳定性评价具有重要的指示意义。
The available hot-spring data show that the geothermal field along the Dali-Ruili railway in western Yunnan Province has different subareas.The authors studied the distribution characteristics of igneous rocks,active faults,earthquakes in history and other related geophysical fields,such as MT and P wave velocity in the crust in this area.The results show that the distribution of the middle/high geothermal subareas is spatially well consistent with that of the igneous rocks and the active fault system.It is also concluded that there are three types of hot springs based on the caloric origin in this area,i.e.,magma type,deep circle through deep-cut fault type and magma-deep circle type.Studies also show that there is spatial correlation between the distribution of the hot springs and that of the earthquakes in history.An integrated analysis of all the data obtained has led the authors to believe that the geo-thermal field in this area can act as an index for the estimation of the geo-engineering stability.
The available hot-spring data show that the geothermal field along the Dali-Ruili railway in western Yunnan Province has different subareas.The authors studied the distribution characteristics of igneous rocks,active faults,earthquakes in history and other related geophysical fields,such as MT and P wave velocity in the crust in this area.The results show that the distribution of the middle/high geothermal subareas is spatially well consistent with that of the igneous rocks and the active fault system.It is also concluded that there are three types of hot springs based on the caloric origin in this area,i.e.,magma type,deep circle through deep-cut fault type and magma-deep circle type.Studies also show that there is spatial correlation between the distribution of the hot springs and that of the earthquakes in history.An integrated analysis of all the data obtained has led the authors to believe that the geo-thermal field in this area can act as an index for the estimation of the geo-engineering stability.
引文
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[22]胡鸿翔,陆涵行,王椿镛,等.滇西地区地壳结构的爆破地震研究[J].地球物理学报,1986,29(2):133-144.
[23]孙洁,徐常芳,江钊,等.滇西地区地壳上地幔电性结构与地壳构造活动的关系[J].地震地质,1989,11(1):35-45.
[24]杨晓涛,胥颐,刘建华,等.腾冲火山区的地震层析成像及其构造意义[J].地球物理学报,2011,54(8):2050-2059.
①吴中海,李贵书,张绪教,等.云南大理至瑞丽铁路优选线1∶25000综合地质调查成果报告.2010.
②云南省地质调查院.1∶25万腾冲县幅、潞西市幅、滚龙幅、凤庆县幅和大理市幅地质图.2006.
[2]常承法.滇西大地构造性质和发展历史[M].北京:中国地质学会,1965.
[3]何科皓,赵崇有,何浩坡,等.滇西陆内裂谷与造山作用——滇西地区印支期后的构造演化[M].武汉:中国地质大学出版社,1996.
[4]胡斌,戴塔根,胡瑞忠,等.滇西地区壳体大地构造单元的划分及其演化与运动特征[J].大地构造与成矿学,2005,29(4):537-544.
[5]袁学诚.中国地球物理图集[M].北京:地质出版社,1996.
[6]马杏垣.中国岩石圈动力学地图集[M].北京:中国地图出版社,1989.
[7]吴乾藩,祖金华,谢毅真,等.云南地区地热基本特征[J].地震地质,1988,10(4):177-183.
[8]丁国瑜.中国岩石圈动力学概论[M].北京:地震出版社,1991.
[9]汪缉安,徐青,张文仁.云南大地热流及地热地质问题[J].地震地质,1990,12(4):367-377.
[10]佟伟,章铭陶(中国科学院青藏高原综合科学考察队).腾冲地热[M].北京:科学出版社,1989.
[11]佟伟,章明陶.横断山区温泉志[M].北京:科学出版社,1994.
[12]周真恒,向才英,覃玉玺,等.云南深部热流研究[J].西北地震学报,1997,19(4):51-57.
[13]陈墨香.新编中国温泉图及其说明[J].地质科学,1992,12(增刊):322-332.
[14]云南省地勘局.云南省岩石地层[M].武汉:中国地质大学出版社,1996.
[15]白登海,廖志杰,赵国泽,等.从MT探测结果推论腾冲热海热田的岩浆热源[J].科学通报,1994,36(4):344-347.
[16]赵慈平,冉华,陈坤华.由相对地热梯度推断的腾冲火山区现存岩浆囊[J].岩石学报,2006,22(6):1517-1528.
[17]王椿镛,Mooney W D,王溪莉,等.川滇地区地壳上地幔三维速度结构研究[J].地震学报,2002,24(1):1-16.
[18]姜朝松,周真恒,赵慈平.腾冲火山区地壳及上地幔结构特征[J].地震研究,2004,27(增刊):1-6.
[19]滕德贞.云南温泉与地震[J].地震研究,1982,(5):23-29.
[20]魏文博,陈乐寿,谭捍东,等.西藏中、南部壳内高导体与热结构特点——INDEPTH-MT提供的证据[J].现代地质,1997,11(3):387-392.
[21]Wei W B,Unsworth M,Jin S,et al.Conductivity structure of crustand upper mantle beneath the northern Tibetan Plateau:results ofsuper-wide band magnetotelluric sounding[J].China J.Geophys.,2006,49(4):1098-1110.
[22]胡鸿翔,陆涵行,王椿镛,等.滇西地区地壳结构的爆破地震研究[J].地球物理学报,1986,29(2):133-144.
[23]孙洁,徐常芳,江钊,等.滇西地区地壳上地幔电性结构与地壳构造活动的关系[J].地震地质,1989,11(1):35-45.
[24]杨晓涛,胥颐,刘建华,等.腾冲火山区的地震层析成像及其构造意义[J].地球物理学报,2011,54(8):2050-2059.
①吴中海,李贵书,张绪教,等.云南大理至瑞丽铁路优选线1∶25000综合地质调查成果报告.2010.
②云南省地质调查院.1∶25万腾冲县幅、潞西市幅、滚龙幅、凤庆县幅和大理市幅地质图.2006.
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