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| 根据多时相夜间MODIS LST推断的腾冲地区新生代火山岩岩浆囊分布与活动特征 | |
| 引用本文： | 李辉,彭松柏,乔卫涛,林木森,王振胜,田礼乔.根据多时相夜间MODIS LST推断的腾冲地区新生代火山岩岩浆囊分布与活动特征[J].岩石学报,2011,27(10):2873-2882. |
| 作者姓名： | 李辉 彭松柏 乔卫涛 林木森 王振胜 田礼乔 |
| 作者单位： | 1. 中国地质大学地球科学学院,武汉430074;中国地质大学教育部长江三峡地质灾害研究中心,武汉430074 2. 中国地质大学地球科学学院,武汉,430074 3. 中国地质大学地球物理与空间信息学院,武汉,430074 4. 武汉大学测绘遥感信息工程国家重点实验室,武汉,430079 |
| 基金项目： | 本文受大陆科学钻探选址与钻探实验项目(SinoProbe-05-03)和中央高校基本科研业务费专项资金资助项目 (CUGL100211)联合资助. |
| 摘 要： | 腾冲火山地热区位于印度板块与欧亚板块俯冲-碰撞带的弧后活动区,是我国新生代火山-地热最为活动的地区之一.本文利用MODIS夜间月平均地表温度(Land Surface Temperature,LST)数据,计算了研究区2001～2011年132个月的月平均地表温度,圈定了地温异常区；分析了异常区年内及年际间的平均地表温度变化趋势,推测了可能的地下岩浆囊分布位置及活动特征.研究结果表明,腾冲地区现今地下可能存在3个岩浆囊:第1个位于五合-新华-蒲川-团田一带,面积约为537km2,地温异常最明显；第2个位于朗蒲-热海-马鞍山地区,面积约为226km2,地温异常次之；第3个位于马站-曲石之间,面积约为28km2,地温异常较为明显.3个地温异常区在年内的地表温度变化趋势基本一致,而且周期性明显,均在5～6月份和8～9月份出现2个温度峰.其中朗蒲-热海-马鞍山异常区的地温变化波动最大,可能反映地下岩浆囊地热系统与地表地下水系统的对流交换活动性更强.MODIS夜间月平均地表温度数据得出的结果与测震、GPS形变、He同位素比值及最大相对地热梯度等方法推测的地温异常区范围具有很好的一致性,特别是地温异常区年内温度周期性变化的发现,表明卫星热红外遥感技术应用于地热异常实时监测与研究的巨大潜力. |
| 关 键 词： | 岩浆囊分布 MODIS LST 地热异常 热红外遥感 腾冲 |
| 收稿时间： | 5/1/2011 12:00:00 AM |
| 修稿时间： | 2011/8/13 0:00:00 |
The distribution and activity of Cenozoic magma chamber in Tengchong volcano area deduced from the MODIS multi-temporal monthly night LST data |
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| LI Hui,PENG SongBai,QIAO WeiTao,LIN MuSen,WANG ZhenSheng and TIAN LiQiao.The distribution and activity of Cenozoic magma chamber in Tengchong volcano area deduced from the MODIS multi-temporal monthly night LST data[J].Acta Petrologica Sinica,2011,27(10):2873-2882. | |
| Authors: | LI Hui PENG SongBai QIAO WeiTao LIN MuSen WANG ZhenSheng and TIAN LiQiao |
| Institution: | Earth Science Faulty, China University of Geosciences, Wuhan 430074, China;Three Gorges Research Center for Geohazards, Ministry of Education, China University of Geosciences, Wuhan 430074, China;Earth Science Faulty, China University of Geosciences, Wuhan 430074, China;Three Gorges Research Center for Geohazards, Ministry of Education, China University of Geosciences, Wuhan 430074, China;Earth Science Faulty, China University of Geosciences, Wuhan 430074, China;Earth Science Faulty, China University of Geosciences, Wuhan 430074, China;Institute of Geophysics and Geomatics, China University of Geosciences, Wuhan 430074, China;State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan 430079, China |
| Abstract: | Tengchong volcanic geothermal area is located at the active arc zone of the subduction and collision of the Indian plate and Eurasian plates, and is considered as one of the most potentially active volcanic eruption areas in China. In order to study the spatial distribution and activity of the underground magma chamber, MODIS LST (Land Surface Temperature) data were used to identify the geothermal anomalies that may be created by the heating from the underground magma chamber. The monthly night MODIS LST data from Mar. 2000 to Mar. 2011 of the study area were collected and analyzed. The 132 month average LST map was derived and three geothermal anomalies were identified. In the light of the previous studies in this area, it can be deduced that there are three magma chambers beneath the three thermal anomalies. The first one is located along Wuhe-Xinhua-Puchuan-Tuantian with the most significant geothermal anomaly, and covers 537km2. The second one is situated in the Langpu-Rehai-Maanshan area with a significant geothermal anomaly and an area of 226km2. The third one is located between Mazhan and Qushi with an obvious geothermal anomaly and a coverage of 28km2. It is also found that the patterns of the monthly LST variation of the three thermal anomalies are similar, with 2 temperature peaks occurring in May, June and August, September, which is different from that of the local temperature of the same period. The 10-year annual LST of the geothermal anomaly in Langpu-Rehai-Maanshan area shows the greatest variations among the three, which suggests the active convective exchange of heat between the underground magma chamber and the surface water, and can be inferred that the beneath this magma chamber is the most active among the three. The findings of this study agree well with the results from seismology, GPS-based deformation detection, He isotopic emission and relative geothermal gradient measurements. It demonstrates the effectiveness and potential of thermal infrared remote sensing in geothermal studies. |
| Keywords: | Magma chamber distribution MODIS LST Geothermal anomalies Thermal infrared remote sensing Tengchong |
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