琼州海峡现代地壳运动及构造活动性分析
发布时间：2018-12-11 21:16
【摘要】：本文应用GPS变形监测技术的手段,以琼州海峡跨海通道地区为例,进行大地变形及构造活动性监测,旨在推断地壳运动趋势及断层活动性。据现有资料及设计,分别将25个GPS观测点分五组布设在琼州海峡两岸,广东徐闻迈陈镇、徐闻龙塘镇、海南东寨港、海南临高县和石山镇。分别对局部和两岸进行了2014至2016年共五次观测,数据处理选取观测网中一个监测站作为基准站,充分运用GPS差分定位方法,利用pinnacle数据后处理软件处理,随后计算出历次观测的位移,分析得出研究区研究区地壳向南西运动,存在一个逆时针方向的位移场,灯楼角南西向年速率为84.3mm/a。葛园南东向的位移年速率为27.6mm/a,西洋南西向的位移年速率为18.0mm/a,北岸位移无规律,林银向南东东方向速率26mm/a,石山向北西西方向年速率4.4mm/a。且区内发育有多条断裂,如正断层铺前-清澜断裂,铺前-马袅断裂,逆断层临高断裂临高断裂。区内还发现了位于迈陈和龙塘的三条次级小断裂,除临高断层外均为左旋走滑断层,临高断层为右旋走滑断层,观测结果验证了这些断层的正、逆或者左旋、右旋等活动情况,并定量的分析了各个断层两侧的滑移速率。铺前-清澜断裂,断层西侧位移速率约为45.8mm/a,方向约为21°,东侧位移方向为北北东向(1.4°-6.5°),平均速率46.4mm/a。临高断层,横穿海峡,断层东侧位移年速率为4.9-6.4mm/a,个别点25.2mm/a。方向为南西向(158°-215°);断层西侧位移速率为40.5mm/a,方向为27.5°。迈陈观测网活动断裂a存在于迈谷与其他四个点位之间,活动断裂b存在于位于北注、讨墩和灯楼角、对楼外之间。龙塘观测网连止、西洋、老卢角与下塘、葛园间可能存在活动断层c。但未见与迈陈-北和断层,龙塘-曲界断层活动,均为现今不活动的隐伏断层。
[Abstract]:In this paper, using the GPS deformation monitoring technique and taking the Qiongzhou Strait cross-sea passage area as an example, the geodesic deformation and tectonic activity are monitored in order to infer the crustal movement trend and fault activity. According to the existing data and design, 25 GPS observation points were divided into five groups on both sides of the strait in Qiongzhou, Xuwen Meichen Town, Xuwen Longtang Town, Dongzhai Port in Hainan Province, Lingao County and Shi Shan Town in Hainan Province. From 2014 to 2016, five observations were made on both sides of the Taiwan Strait. Data processing selected a monitoring station in the observation network as a reference station, fully utilized the GPS differential positioning method, and used the pinnacle data post-processing software to process the data. Then, the displacement of each observation is calculated, and it is found that the crust moves southward to the west in the studied area, and there is an anti-clockwise displacement field. The annual rate of southwestward direction of lantern angle is 84.3 mm / a. The annual displacement rate of GE Yuan south to east is 27.6mm / a, that of western south-west direction is 18.0mm / a, the displacement of north coast is irregular, Lin Yin's speed is 26 mm / a to the south east direction, and the annual speed of Shishan is 4.4 mm / a to the north west direction. There are many faults in the area, such as normal fault prepaving-Qinglan fault, paving-Maiao fault, reverse fault facing high fault. Three minor faults were also found in Maichen and Longtang, all of which were left lateral strike-slip faults except Lingao faults, while the Lingao faults were dextral strike-slip faults. The observation results verified the positive, inverse or left-lateral, right-lateral and other activities of these faults. The slip rates on both sides of each fault are quantitatively analyzed. The displacement rate in the west side of the fault is about 45.8 mm / a, the direction is about 21 掳, and the displacement direction in the east side is NNE (1.4 掳-6.5 掳), with an average velocity of 46.4 mm / a. The annual displacement rate of the east side of the fault is 4.9-6.4 mm / a, and the individual points are 25.2 mm / a. The displacement velocity of the west side of the fault is 40.5 mm / a and the direction is 27.5 掳. The active fault a of Meichen observation network exists between the Meigu and the other four points, and the active fault b is located between the north note, the pier and the corner of the lantern tower, outside the building. Longtang observation network, Western, Lao Lu Kok and Xiatang, GE Yuan may exist between the active fault c. However, there is no active fault with Mai Chen-Bei he fault and Longtang-bend fault, all of which are hidden faults which are not active at present.
【学位授予单位】：中国地质大学(北京)
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P542
本文编号：2373235
[Abstract]:In this paper, using the GPS deformation monitoring technique and taking the Qiongzhou Strait cross-sea passage area as an example, the geodesic deformation and tectonic activity are monitored in order to infer the crustal movement trend and fault activity. According to the existing data and design, 25 GPS observation points were divided into five groups on both sides of the strait in Qiongzhou, Xuwen Meichen Town, Xuwen Longtang Town, Dongzhai Port in Hainan Province, Lingao County and Shi Shan Town in Hainan Province. From 2014 to 2016, five observations were made on both sides of the Taiwan Strait. Data processing selected a monitoring station in the observation network as a reference station, fully utilized the GPS differential positioning method, and used the pinnacle data post-processing software to process the data. Then, the displacement of each observation is calculated, and it is found that the crust moves southward to the west in the studied area, and there is an anti-clockwise displacement field. The annual rate of southwestward direction of lantern angle is 84.3 mm / a. The annual displacement rate of GE Yuan south to east is 27.6mm / a, that of western south-west direction is 18.0mm / a, the displacement of north coast is irregular, Lin Yin's speed is 26 mm / a to the south east direction, and the annual speed of Shishan is 4.4 mm / a to the north west direction. There are many faults in the area, such as normal fault prepaving-Qinglan fault, paving-Maiao fault, reverse fault facing high fault. Three minor faults were also found in Maichen and Longtang, all of which were left lateral strike-slip faults except Lingao faults, while the Lingao faults were dextral strike-slip faults. The observation results verified the positive, inverse or left-lateral, right-lateral and other activities of these faults. The slip rates on both sides of each fault are quantitatively analyzed. The displacement rate in the west side of the fault is about 45.8 mm / a, the direction is about 21 掳, and the displacement direction in the east side is NNE (1.4 掳-6.5 掳), with an average velocity of 46.4 mm / a. The annual displacement rate of the east side of the fault is 4.9-6.4 mm / a, and the individual points are 25.2 mm / a. The displacement velocity of the west side of the fault is 40.5 mm / a and the direction is 27.5 掳. The active fault a of Meichen observation network exists between the Meigu and the other four points, and the active fault b is located between the north note, the pier and the corner of the lantern tower, outside the building. Longtang observation network, Western, Lao Lu Kok and Xiatang, GE Yuan may exist between the active fault c. However, there is no active fault with Mai Chen-Bei he fault and Longtang-bend fault, all of which are hidden faults which are not active at present.
【学位授予单位】：中国地质大学(北京)
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P542
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