地质雷达探测技术在浅覆盖活动构造区填图中的应用——以宁夏青铜峡地区1:5万新构造与活动构造区填图为例

尹艳广; 施炜; 公王斌; 秦翔; 赵燚

地质雷达探测技术在浅覆盖活动构造区填图中的应用——以宁夏青铜峡地区1:5万新构造与活动构造区填图为例

尹艳广^{1, 2,},
施炜^2, ,,
公王斌²,
秦翔^{1, 2},
赵燚^{1, 2}

1.
中国地质大学(北京) 地球科学与资源学院, 北京 100083
2.
中国地质科学院地质力学研究所, 北京 100081

基金项目:

中国地质调查局地质调查项目"特殊地质地貌区填图试点" DD20160060

详细信息

作者简介:
尹艳广(1991-), 男, 硕士研究生, 专业方向沉积地质学与环境分析。E-mail:yinyanguang0501@126.com

通讯作者:
施炜(1971-), 男, 研究员, 主要从事中、新生代构造研究。E-mail:shiweinmg@163.com

中图分类号: P631
计量
- 文章访问数: 146
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- PDF下载量: 17
- 被引次数: 0
出版历程
- 收稿日期: 2016-09-18
- 刊出日期: 2017-04-28

THE APPLICATION OF GROUND PENETRATING RADAR TECHNOLOGY IN GEOLOGICAL MAPPING OF SHALLOW COVERED ACTIVE TECTONICS REGION:A CASE STUDY OF 1:50000 MAPPING OF NEOTECTONIC ZONE AND ACTIVE TECTONIC ZONE IN QING TONGXIA AREA, NINGXIA

YIN Yan-guang^{1, 2
,},
SHI Wei^{2
, ,},
GONG Wang-bin²,
QIN Xiang^{1, 2},
ZHAO Yi^{1, 2}

1.
School of Earth Science and Recources, China University of Geociences, Beijing 100083, China
2.
Institute of Geomechanics, China Academy of Geological Sciences, Beijing 100081, China

摘要

摘要: 地质雷达探测以其分辨率高、定位准确、快速经济、灵活方便、剖面直观、实时图像显示等优点，成为地质调查中广泛使用的一种探测方法。本次宁夏青铜峡地区1：5万新构造与活动构造区填图中运用地质雷达探测技术对第四系和隐伏断层进行了探测。结果表明，40 MHz地质雷达可以有效地探测地表以下30 m内的第四系结构，可清晰地识别出3套第四纪地层。这一地层结构划分被第四系浅钻证实，其为第四系全新统灵武组，自下而上由泥岩、砂砾石层和含砾的砂或泥等3套地层组成。对测区主干断裂——柳木高断裂南段的地质雷达探测表明，断裂带表现为近地表发散向下汇聚的正花状结构，这与探槽揭露的特征一致，表明地质雷达探测可以准确标定隐伏断层平面位置与垂向精细结构。本次宁夏地质填图证实，地质雷达技术是浅覆盖活动构造区进行隐伏断裂调查和第四纪地层层序划分的可行、高效、便捷的技术方法之一。
- 地质雷达 /
- 活动构造区 /
- 地质填图 /
- 浅覆盖区 /
- 隐伏断裂
Abstract: Ground Penetrating Radar (GPR) detectionisa widely-used detection method in geological survey owing to its advantages of high-resolution, accurate positioning, high speed, flexibility, convience, profile visualization, real-time image display and so on. GPR detection technology is applied to detect Quaternary system and blind faults in the mapping of 1:50000 shallow covered active tectonics zone of Qingtongxia, Ningxia. Detection results show that 40MHz GPR can effectively detect the quaternary system structure within 30 m below the surface, and 3 sets of Quaternary strata can be clearly defined. Drilling results confirm that Holocene Lingwu formation (Ql) from bottom to top is comprised of mudstone, gravel layer, and sand or mud with gravel. The radar image reveals that the south of the Liumugao fault of main fault has structural features of upward divergence and downward convergence with flower structure, which is consistent with the results of trench investigation.It shows that GPR can accurately demarcate the plane position and vertical detail structure of blind faults. This work indicates that GPR technology is feasible, effective and convenient for blind fault investigation and sequence division of the upper part of the Quaternary in shallow covered active tectonic zone.
- ground penetrating radar /
- active tectonic region /
- geological mapping /
- shallow covered area /
- blind fault

HTML全文

图 1 地质雷达系统结构^[4]

Figure 1. Siructure of ground-penetrating radar

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图 2 检测结果与实际对照图^[4]

Figure 2. Test results VS. physical truth

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图 3 反射探测原理图^[4]

Figure 3. The diagram of reflection detection principle

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图 4 宁夏青铜峡地区地质简图

Figure 4. Geological sketch of Qingtongxia area, Ningxia

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图 5 地质雷达宁夏野外施工图

a-覆盖区第四纪地层结构探测;b-覆盖区断裂的结构探测

Figure 5. GPR investigation in Ningxia

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图 6 地质雷达LD12与LD37测线剖面

Figure 6. Profiles of GPR line LD12 and LD37

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图 7 跨断裂地质雷达测线LD02、LD03位置图

Figure 7. Locations of GPR LD02, LD03 of cross fault

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图 8 地质雷达LD02、LD03剖面图

Figure 8. Profile of GPR line LD02, LD03

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图 9 钻井1岩心柱状图

Figure 9. Bar chart of drilling core of well 1

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图 10 探槽TC05剖面特征

Figure 10. Profile features of TC05

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图 11 受高压线影响的雷达剖面图

Figure 11. Profile of GPR influenced by the high voltage cable

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表 1 不同频率天线的探测深度和分辨率^[6]

Table 1. Different frequency antenna detecting depth VS. resolution

中心频率/MHz 探测深度/m 分辨率/cm

10 60 200

25 50 100

40 40 50

100 25 25

200~250 12 12.5

350~500 7 5

800 2.5 3

1000 1.5 2.5

1200~1600 1 1.5

2000~2500 0.5 0.8

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表 2 宁夏地质填图使用的主要仪器设备

Table 2. The main instruments and equipments in geological mapping, Ningxia

序号名称型号设备编号

1 地质雷达 RIS-K2型 06034

2 40MHz天线 TR 40 K2 AS 01366_A_00

3 手持式GPS

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