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標題: | 運用GPS與差分合成孔徑雷達干涉研究中亞土耳其-亞美尼亞高原區域的大陸地殼變形 Study of continent crust deformation in eastern Turkish-Armenian plateau and surrounding regions by GPS and D-InSAR |
作者: | Yi-Ting Liao 廖翊廷 |
指導教授: | 胡植慶(Jyr-Ching Hu) |
關鍵字: | 歐亞-阿拉伯板塊碰撞,東土耳其高原,亞美尼亞高原,GPS,差分合成孔徑雷達, Arabian-Eurasia collision,eastern Turkish plateau,Armenian plateau,GPS,D-InSAR, |
出版年 : | 2013 |
學位: | 碩士 |
摘要: | 中亞的地體構造是建構在歐亞板塊阿拉伯板塊碰撞的框架之下,其聚合速率為21 mm/yr,屬於古特提斯洋造山運動的重要區域,陸內存在許多殘塊,相互影響之下發展出區域性複雜的變形機制。最顯著的區域構造包括西邊的安那托利亞高原的共軛走向滑移斷層、東南邊的札格羅斯褶皺逆衝帶、及北邊的大高加索造山帶。這些區域的高活動性皆可從GPS和地震分布觀察到。然而位於這些區域的中間,稱為東土耳其與亞美尼亞高原 (簡稱土亞高原),其在近期地震分布與斷層研究上顯示活動性非常低。我們利用前人的GPS資料計算應變速率與向量分解,分析塊體運動模式,先了解中亞各活動區域的背景,再用精細的差分合成孔徑雷達分析土亞高原的地表變形。我們注意到高原中間的阿拉拉特盆地可視為土亞高原內的一個主要分界線,以南的東土耳其高原的變形受安那托利亞斷層的影響而較亞美尼亞高原顯著。另外,合成孔徑雷達結果顯示阿拉拉特盆地可視為一個相對穩定的區域,並且屬於輕微伸張的環境;而在亞美尼亞北邊的小高加索區域,扎瓦赫季區的變形則是與南北方向的構造活動有關。這些皆反應出即使大陸地殼變形的空間分佈極為不均,整個高原仍受到南北向的背景應力所影響。 Intra-continental deformation in Central Asia is accommodated by collision between Arabian and Eurasia plates at ~21 mm/yr. Active tectonics including lateral escape of Anatolian block, shortening of Zagros fold-thrust belt, and shortening of Greater Caucasus mountain belt, are considered to be the major consumptions of the collision. However, the eastern Turkish plateau (ETP) and Armenian plateau (AP) in the middle of this region shows very low seismicity and low deformation rates. We use GPS measurements and D-InSAR from C-band Envisat radar images by ROI_pac software, to reconstruct 3D deformation pattern of ETP and AP. From strain rate and GPS decomposition, we notice that deformation of ETP has more correlation with activity of Anatolian faults than deformation of AP. Moreover, the strain accumulation from the collision is ceased toward AP. From D-InSAR, Ararat basin is shown as a relatively stable area which belongs to an extensive environment. It also indicates that deformation of Javakheti area located in Lesser Caucasus in the northern Armenia is N-S tectonics related. The uneven distribution of continental deformation in the plateau can still imply that this region is under the N-S direction of compressive stress accommodated to the Arabia-Eurasia collision direction. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/60415 |
全文授權: | 有償授權 |
顯示於系所單位: | 地質科學系 |
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