西南地区航磁区域特征
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摘要
通过对西南地区航磁数据进行化极、垂导和延拓等处理,研究西南地区航磁区域特征,确定采用航磁化极上延20 km等值线图作为西南地区航磁区域异常,对西南地区区域航磁异常划分了13个分区。结合地质、重力、天然地震和遥感等资料进行综合推断解释,将西南地区划分为3个一级构造单元,9个二级构造单元,22个三级构造单元,并重点对6个二级构造单元的地质、矿产和航磁异常特征进行了深入分析研究,认为班公湖—怒江异常带、雅鲁藏布江异常带、三江异常带等串珠状磁异常与该成矿带的矿产地位置吻合较好,证明航磁异常在找磁性矿产方面效果显著。通过航磁异常上延10 km与地震震中点位对比分析,证明航磁反映深部断裂构造特征明显,能明显反映出西南地区区域地质构造特征。
This article through to the southwest of aeromagnetic data,vertical guide and continuation of treatment,Southwest research aeromagnetic regional characteristics,determine the aerial magnetization in delay 20 km contour map as aeromagnetic regional anomaly in southwest China,the regional aeromagnetic anomalies in southwest divides the 13 partitions. Combined with geological,gravity,natural comprehensive inference and interpretation,seismic and remote sensing data could be divided into three first-order tectonic units in the southwest,9 second-order tectonic units,22 level 3 tectonic units; And focusing on six secondary tectonic units of geological and mineral and aeromagnetic anomaly characteristics,etc. Carried on the thorough analysis and research. Think high class-nujiang anomaly zone,the yarlung zangbo river and lake zones,sanjiang anomaly zone beaded magnetic anomaly are in good agreement with the properties of the metallogenic belt,prove that aeromagnetic anomalies is looking for a magnetic mineral effect is remarkable. Delay 10 km on the aeromagnetic anomalies and the quake's epicentre point comparison analysis research,proves the obvious,aeromagnetic reflect the characteristics of the deep fracture structure can obviously reflect the regional geological tectonic characteristics in southwest China.
This article through to the southwest of aeromagnetic data,vertical guide and continuation of treatment,Southwest research aeromagnetic regional characteristics,determine the aerial magnetization in delay 20 km contour map as aeromagnetic regional anomaly in southwest China,the regional aeromagnetic anomalies in southwest divides the 13 partitions. Combined with geological,gravity,natural comprehensive inference and interpretation,seismic and remote sensing data could be divided into three first-order tectonic units in the southwest,9 second-order tectonic units,22 level 3 tectonic units; And focusing on six secondary tectonic units of geological and mineral and aeromagnetic anomaly characteristics,etc. Carried on the thorough analysis and research. Think high class-nujiang anomaly zone,the yarlung zangbo river and lake zones,sanjiang anomaly zone beaded magnetic anomaly are in good agreement with the properties of the metallogenic belt,prove that aeromagnetic anomalies is looking for a magnetic mineral effect is remarkable. Delay 10 km on the aeromagnetic anomalies and the quake's epicentre point comparison analysis research,proves the obvious,aeromagnetic reflect the characteristics of the deep fracture structure can obviously reflect the regional geological tectonic characteristics in southwest China.
引文
[1]薛曲军.青藏高原航磁测量及雅鲁藏布江双航磁异常带的性质研究[D].北京:中国地质大学,2002.
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[11]杨华,梁月明.全国航磁△T异常与中国地学断块构造[J].物探与化探,2013,37(6):957-967.
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[13]乔贵春,王德华,刘伟,等.青藏铁路沿线航磁特征及找矿远景预测[J].物探与化探,2012,36(6):915-921.
[14]张振宇,王绪本,方慧.龙门山构造带中段大地电磁测深研究[J].物探与化探,2012,36(3):377-381.
[15]王亮,张应文,刘盛光.贵州重磁异常分区特征与区域成矿区(带)分布特色[J].物探与化探,2009,33(5):487-492.
[16]殷秀华,黎益仕,冯华.青藏高原重力场特征与地壳构造[J].物探与化探,1998,22(6):440-445.
[17]孙洁,任飞.西南地区成矿地质背景专题报告[R].成都地质调查中心,2013.
[18]潘桂棠,李兴振,王立全,等.青藏高原及邻区大地构造单元初步划分[J].地质通报,2002,21(11):701-707.
[19]陈智梁,陈世瑜.扬子地块西缘地质构造演化[M].重庆地质出版社,1987:50-157.
[20]康国发,高国明,白春华,等.青藏高原及邻区的地壳磁异常特征与区域构造[J].中国科学:地球科学,2011,41(11):1577-1585.
[21]刘增乾.青藏高原大地构造与形成演化[M].北京:地质出版社,1990:25-85.
[2]李富,曾琴琴,王永华,等.西南地区磁测资料应用研究专题报告[R].成都地质调查中心,2013.
[3]熊盛青,周伏洪,姚正煦,等.青藏高原中西部航磁调查[M].北京:地质出版社,2001:111-162.
[4]邓晋福,腾吉文,彭聪,等.中国地球物理场特征及深部地质与成矿[M].北京:地质出版社,2008:73-85.
[5]贺日政,高锐,郑洪伟,等.青藏高原中西部航磁异常的匹配滤波分析与构造意义[J].地球物理学报,2007,50(4):1131-1138.
[6]贺日政,高锐,郑洪伟.隐伏在青藏高原中部的东西走向断裂的航磁异常场特征及其意义[J].吉林大学学报:地球科学版,2007,37(5):1002-1007.
[7]周伏洪,姚正煦,刘振军,等.青藏高原中部北北东向深部负磁异常芾成因及其意义[J].物探与化探,2002,26(1):12-16.
[8]刘振军,王德发,范子梁,等.高精度航空磁测在西藏一江两河地区找矿效果[J].物探与化探,2011,35(1):46-51.
[9]郑广如,张永军,眭素文.三江中段侵入岩航磁异常特征及找矿作用[J].物探与化探,2007,31(6):535-545.
[10]周文戈,谢鸿森,赵志丹,等.哀牢山变质带元江—墨江剖面岩石的纵波波速特征及其地质意义[J].地球物理学报,1998,41(S):48-54.
[11]杨华,梁月明.全国航磁△T异常与中国地学断块构造[J].物探与化探,2013,37(6):957-967.
[12]杨建辉,王亮,张家德,等.黔东南重磁异常与金异常特征及找矿意义[J].物探与化探,2013,37(6):957-967.
[13]乔贵春,王德华,刘伟,等.青藏铁路沿线航磁特征及找矿远景预测[J].物探与化探,2012,36(6):915-921.
[14]张振宇,王绪本,方慧.龙门山构造带中段大地电磁测深研究[J].物探与化探,2012,36(3):377-381.
[15]王亮,张应文,刘盛光.贵州重磁异常分区特征与区域成矿区(带)分布特色[J].物探与化探,2009,33(5):487-492.
[16]殷秀华,黎益仕,冯华.青藏高原重力场特征与地壳构造[J].物探与化探,1998,22(6):440-445.
[17]孙洁,任飞.西南地区成矿地质背景专题报告[R].成都地质调查中心,2013.
[18]潘桂棠,李兴振,王立全,等.青藏高原及邻区大地构造单元初步划分[J].地质通报,2002,21(11):701-707.
[19]陈智梁,陈世瑜.扬子地块西缘地质构造演化[M].重庆地质出版社,1987:50-157.
[20]康国发,高国明,白春华,等.青藏高原及邻区的地壳磁异常特征与区域构造[J].中国科学:地球科学,2011,41(11):1577-1585.
[21]刘增乾.青藏高原大地构造与形成演化[M].北京:地质出版社,1990:25-85.
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