瓊州海峽現(xiàn)代地殼運(yùn)動(dòng)及構(gòu)造活動(dòng)性分析
發(fā)布時(shí)間：2018-12-11 21:16
【摘要】：本文應(yīng)用GPS變形監(jiān)測技術(shù)的手段,以瓊州海峽跨海通道地區(qū)為例,進(jìn)行大地變形及構(gòu)造活動(dòng)性監(jiān)測,旨在推斷地殼運(yùn)動(dòng)趨勢及斷層活動(dòng)性。據(jù)現(xiàn)有資料及設(shè)計(jì),分別將25個(gè)GPS觀測點(diǎn)分五組布設(shè)在瓊州海峽兩岸,廣東徐聞邁陳鎮(zhèn)、徐聞龍?zhí)伶?zhèn)、海南東寨港、海南臨高縣和石山鎮(zhèn)。分別對(duì)局部和兩岸進(jìn)行了2014至2016年共五次觀測,數(shù)據(jù)處理選取觀測網(wǎng)中一個(gè)監(jiān)測站作為基準(zhǔn)站,充分運(yùn)用GPS差分定位方法,利用pinnacle數(shù)據(jù)后處理軟件處理,隨后計(jì)算出歷次觀測的位移,分析得出研究區(qū)研究區(qū)地殼向南西運(yùn)動(dòng),存在一個(gè)逆時(shí)針方向的位移場,燈樓角南西向年速率為84.3mm/a。葛園南東向的位移年速率為27.6mm/a,西洋南西向的位移年速率為18.0mm/a,北岸位移無規(guī)律,林銀向南東東方向速率26mm/a,石山向北西西方向年速率4.4mm/a。且區(qū)內(nèi)發(fā)育有多條斷裂,如正斷層鋪前-清瀾斷裂,鋪前-馬裊斷裂,逆斷層臨高斷裂臨高斷裂。區(qū)內(nèi)還發(fā)現(xiàn)了位于邁陳和龍?zhí)恋娜龡l次級(jí)小斷裂,除臨高斷層外均為左旋走滑斷層,臨高斷層為右旋走滑斷層,觀測結(jié)果驗(yàn)證了這些斷層的正、逆或者左旋、右旋等活動(dòng)情況,并定量的分析了各個(gè)斷層兩側(cè)的滑移速率。鋪前-清瀾斷裂,斷層西側(cè)位移速率約為45.8mm/a,方向約為21°,東側(cè)位移方向?yàn)楸北睎|向(1.4°-6.5°),平均速率46.4mm/a。臨高斷層,橫穿海峽,斷層?xùn)|側(cè)位移年速率為4.9-6.4mm/a,個(gè)別點(diǎn)25.2mm/a。方向?yàn)槟衔飨?158°-215°);斷層西側(cè)位移速率為40.5mm/a,方向?yàn)?7.5°。邁陳觀測網(wǎng)活動(dòng)斷裂a(bǔ)存在于邁谷與其他四個(gè)點(diǎn)位之間,活動(dòng)斷裂b存在于位于北注、討墩和燈樓角、對(duì)樓外之間。龍?zhí)劣^測網(wǎng)連止、西洋、老盧角與下塘、葛園間可能存在活動(dòng)斷層c。但未見與邁陳-北和斷層,龍?zhí)?曲界斷層活動(dòng),均為現(xiàn)今不活動(dòng)的隱伏斷層。
[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 擄, and the displacement direction in the east side is NNE (1.4 擄-6.5 擄), 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 擄. 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.
【學(xué)位授予單位】：中國地質(zhì)大學(xué)(北京)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：P542
本文編號(hào)：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 擄, and the displacement direction in the east side is NNE (1.4 擄-6.5 擄), 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 擄. 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.
【學(xué)位授予單位】：中國地質(zhì)大學(xué)(北京)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：P542
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