發(fā)布時間：2018-01-15 17:39

  本文關(guān)鍵詞：徐淮地區(qū)構(gòu)造變形特征與形成機制研究　出處：《合肥工業(yè)大學》2016年碩士論文　論文類型：學位論文

  更多相關(guān)文章： 構(gòu)造變形 弧形構(gòu)造 形成機制 構(gòu)造演化 數(shù)值模擬 徐淮地區(qū)

【摘要】：徐淮弧形構(gòu)造位于華北板塊東南緣,蘇魯造山帶的西側(cè),東緣以郯廬斷裂帶與揚子板塊相接。研究區(qū)內(nèi)主體褶皺與斷裂軌跡平面上表現(xiàn)出一系列向北西西凸出的弧形。本文在系統(tǒng)收集和總結(jié)前人已有研究成果資料基礎上,通過詳細野外地質(zhì)調(diào)查表明,徐淮弧形構(gòu)造在南北向可分為北、中、南三段,東西向分為鋒帶、中帶、根帶三帶,垂向分為下部構(gòu)造層、中部構(gòu)造層、上部構(gòu)造層的特征,提出“九宮格”式的構(gòu)造變形模式。通過對徐淮弧形構(gòu)造北段和中段斷層應力場反演表明,弧形構(gòu)造形成于區(qū)域擠壓背景下,主壓應力方向為SE-NW向,另外晚期伸展背景下發(fā)育正斷層,拉張應力方向亦為SE-NW向。在此基礎上,結(jié)合原始地層沉積環(huán)境、區(qū)域構(gòu)造背景,提出了徐淮弧形構(gòu)造的形成機制屬于擠壓-重力滑覆動力學機制。對徐淮弧形構(gòu)造進行數(shù)值模擬研究,充分驗證了弧形構(gòu)造形成的動力學背景是來自南東方向的擠壓力,肯定了弧形構(gòu)造形成的擠壓-重力滑脫機制,模擬出南北兩側(cè)的邊界隱伏斷裂對徐淮弧形構(gòu)造形成的限制作用。在上述野外地質(zhì)調(diào)查、斷層應力場反演、數(shù)值模擬技術(shù)的應用,地層間不整合事件與出露巖體的時代綜合研究的基礎上,總結(jié)徐淮弧形構(gòu)造的演化過程,提出T2-K1時期為主變形期,該時期兩個階段的演化奠定了弧形構(gòu)造的基本輪廓。K1-E1時期,在區(qū)域伸展作用背景下,使得區(qū)內(nèi)先存逆斷層復又發(fā)生伸展正斷,以及東部的斷陷盆地發(fā)育。而新近紀以來,區(qū)域逆沖擠壓對徐淮弧形構(gòu)造的影響較小,區(qū)內(nèi)構(gòu)造變形微弱。因此,徐淮弧形構(gòu)造變形的形成起源于華北、華南板塊的陸-陸碰撞,指示中國東部早期受控于南北板塊匯聚的古特提斯構(gòu)造向濱太平洋構(gòu)造轉(zhuǎn)換。
[Abstract]:Xuhuai arc structure is located in the southeastern margin of the North China plate and the west side of the Sulu orogenic belt. In the eastern margin, the Tan-Lu fault zone is connected with the Yangtze plate. A series of arcs protruding northwestward on the surface of the main fold and fault locus in the study area are presented. This paper systematically collects and summarizes the data basis of previous research achievements. Go. The detailed field geological survey shows that the Xuhuai arc structure can be divided into north, middle, south, east and west front zone, middle zone, root zone three zones, vertical divided into lower tectonic layer, central tectonic layer. Based on the characteristics of the upper tectonic layer, a "H5 home page" tectonic deformation model is proposed. The inversion of the fault stress field in the north and middle sections of the Xuhuai arc structure shows that the arc structure was formed in the regional compression background. The direction of principal compressive stress is SE-NW direction, the normal fault is developed in the late extensional setting, and the direction of tensile stress is SE-NW direction. On this basis, combined with the original sedimentary environment, the regional tectonic background. The forming mechanism of Xuhuai arc structure is put forward, which belongs to the mechanism of compression-gravity slip dynamics, and the numerical simulation of Xuhuai arc structure is carried out. It is fully verified that the dynamic background of the arc structure formation is the extrusion force from the south to east direction, and the compression-gravity slip mechanism of the arc structure formation is confirmed. The effect of the boundary hidden faults on the formation of the Xuhuai arc structure is simulated. The application of the field geological survey, the inversion of fault stress field and the numerical simulation technology. On the basis of the comprehensive study of the age of interstratigraphic unconformity events and outcrop rock mass, the evolution process of Xuhuai arc structure is summarized, and the main deformation period of T2-K1 period is put forward. The evolution of the two stages of this period laid the basic outline of the arc structure. K1-E1 period, under the background of regional extension, the overlay of the thrust fault and the extension of the normal fault occurred in the area. Since the Neogene, the influence of regional thrust compression on the Xuhuai arc structure is relatively small, and the tectonic deformation in the area is weak. Therefore, the formation of Xuhuai arc structural deformation originated in North China. The continental-continental collision of the South China plate indicates that the early eastern part of China was controlled by the transition of the paleotesian tectonics converging from the north and south plates to the riparian Pacific tectonic.
【學位授予單位】：合肥工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2016
【分類號】：P542

【相似文獻】

相關(guān)期刊論文 前10條

1 黃仕華;若爾蓋下包座弧形構(gòu)造地質(zhì)特征[J];四川地質(zhì)學報;2000年02期

2 何文舉;“三江”弧形構(gòu)造及其控礦意義[J];云南地質(zhì);2002年04期

3 李巖峰;曲國勝;張進;;弧形構(gòu)造研究進展[J];地球科學進展;2007年07期

4 王瑞瑞;張岳橋;解國愛;許懷智;;大巴山前陸弧形構(gòu)造的成因:來自砂箱實驗的認識[J];地質(zhì)學報;2011年09期

5 王瑞瑞;許志琴;梁鳳華;;大巴山弧形構(gòu)造的成因——來自數(shù)值模擬的證據(jù)[J];地質(zhì)學報;2013年10期

6 喻德淵;;中國幾個弧形構(gòu)造與礦床關(guān)系（節(jié)要）[J];地質(zhì)論評;1951年01期

7 鐘南昌;;華南中生代的同步弧形構(gòu)造[J];華東地質(zhì)學院學報;1983年02期

8 王學佑;;應用遙感圖象試論騰沖地區(qū)弧形構(gòu)造系與鈾礦化的關(guān)系[J];放射性地質(zhì);1983年05期

9 馮啟言;徐州弧形構(gòu)造與地下水[J];中國礦業(yè)大學學報;1990年02期

10 張德潤;阿拉善弧形構(gòu)造的磁場特征及成因探討[J];物探與化探;1992年04期

相關(guān)會議論文 前2條

1 黃祖智;唐榮昌;;四川地區(qū)弧形構(gòu)造與強震關(guān)系的剖析[A];中國地震學會第八次學術(shù)大會論文摘要集[C];2000年

2 姚冬生;;三江弧形構(gòu)造的特征及演化歷史[A];青藏高原地質(zhì)文集（12）——“三江”構(gòu)造地質(zhì)[C];1982年

相關(guān)博士學位論文 前1條

1 李金璽;大巴山弧形構(gòu)造特征及成因機制研究[D];成都理工大學;2014年

相關(guān)碩士學位論文 前2條

1 陳俊;徐淮地區(qū)構(gòu)造變形特征與形成機制研究[D];合肥工業(yè)大學;2016年

2 楊虎;西藏安多弧形構(gòu)造地質(zhì)特征初探[D];中國地質(zhì)大學（北京）;2005年

，

本文編號：1429393