用温度植被干旱指数(<i>TVDI</i>)识别隐伏断层：以云南羊拉铜矿区为例

周丹; 张振飞; 龙斐; 罗成

doi:10.3799/dqkx.2013.042

用温度植被干旱指数(TVDI)识别隐伏断层：以云南羊拉铜矿区为例

doi: 10.3799/dqkx.2013.042

周丹^1,,
张振飞^1, ,,
龙斐²,
罗成²

1.
中国地质大学数学地质遥感地质研究所，湖北武汉 430074
2.
云南迪庆矿业开发有限责任公司，云南香格里拉县 674400

基金项目:

云南铜业集团有限公司科研合作项目 2012026410

详细信息

作者简介:
周丹(1988-)，女，硕士研究生，主要从事遥感地质研究.E-mail: ciwei.dan@163.com

通讯作者:
张振飞，E-mail: zfzhang@cug.edu.cn

中图分类号: P534.4
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- 被引次数: 0
出版历程
- 收稿日期: 2012-09-25
- 刊出日期: 2013-03-01

Mapping Buried Faults Using the Temperature-Vegetation-Dryness Index with an Application in Yangla Copper Mining Area, Yunnan

1.
Institute of Mathematical Geology & Remote Sensing, China University of Geosciences, Wuhan430074, China
2.
Mining Development Co., Ltd, Diqing, Yunnan, Shangrila674400, China

摘要

摘要: 在残积物、土壤覆盖区，若基岩中存在断层，则可能使局部覆盖层加厚、湿度和植被密度相对提高、近地面物质热惯量加大，并在白天的热红外观测中因地表升温较慢而显示地面温度相对较低.这些效应可用温度植被干旱指数(TVDI)加以表征，TVDI的线状低值区(负异常)可作为指示隐伏断层的标志.利用Landsat7 ETM+数据，运用温度植被干旱指数(TVDI)方法，在面积约26 km²的云南羊拉铜矿区进行了隐伏断层识别.结合可见光遥感影像解译及露头地段实地调查，测制了该矿区断层分布图.该研究成果对于羊拉矿区矿山生产有一定的实际意义，同时也显示了热红外遥感技术在覆盖区矿区地质应用方面的潜力.
- 热红外遥感 /
- 温度植被干旱指数 /
- 隐伏断层 /
- 羊拉铜矿区
Abstract: In mountainous areas with eluvium overburden, thickness, moisture and vegetation of the overburden layer may be locally increased where faults are developed in the bedrock. At such localities thermal inertia of the near-surface materials is larger than that in the surrounding areas and relatively low surface temperature due to slower diurnal heating rate may be observed in the daytime. Therefore, the temperature-vegetation-dryness index (TVDI), a combination of surface temperature and vegetation, may be used to retrieve buried faults. Using Landsat7 ETM+ data, we have identified buried faults in this study with TVDI in Yangla copper mining district, Yunnan, which is about 26 km² in area and is covered by residual deposits for the most part. A distribution map of faults of the district is obtained with linear lows of TVDI as indicators of buried faults combined with visible image interpretation and field investigation. While essential for mining practice in Yangla, our results show a remarkable potential of thermal infrared remote sensing in ore-field geological studies in poorly outcropped regions.
- thermal infrared remote sensing /
- temperature-vegetation-dryness index /
- buried faults /
- Yangla copper deposit

HTML全文

图 1 羊拉矿区ETM+影像T_s-NDVI特征空间散点图及拟合的干、湿边(黑三角与黑圆点为一定NDVI对应的T_s的最小值和最大值；R²为相关系数)

Fig. 1. T_s-NDVI space scatter plot of an ETM+ image in Yangla copper mining area, with fitted dry and wet edges

下载: 全尺寸图片幻灯片

图 2 羊拉矿区GeoEye-1真彩色影像及地质调查路线

Fig. 2. GeoEye-1 true color image of Yangla copper mining area with field investigation routes shown

下载: 全尺寸图片幻灯片

图 3 羊拉矿区温度植被干旱指数影像及断层综合解译图(虚线框表示的位置见正文中说明)

Fig. 3. Temperature-vegetation-dryness index image of Yangla copper mining area, with interpreted faults shown

下载: 全尺寸图片幻灯片

图 4 羊拉矿区地表温度T_s影像图

Fig. 4. Surface temperature (T_s) image of Yangla copper mining area

下载: 全尺寸图片幻灯片

图 5 矿区北部(图 3的B处)GeoEye-1真彩色影像(白色箭头处见北东向负地形被北西向断层切错)

Fig. 5. GeoEye-1 true color image showing relations between different faults

下载: 全尺寸图片幻灯片

图 6 北西向断裂破碎带照片(位于图 2的14号观测点处，镜头向北西)

根据断层产状与断裂带内挤压片理产状的空间关系，可判断该断层运动方向为左行平移为主并有一定逆冲分量，说明主应力方向为北东东-南西西向挤压

Fig. 6. Outcrop of a NW-strike fault at site No.14 in Fig. 2

下载: 全尺寸图片幻灯片

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