【摘要】：以向錯理論為基礎(chǔ),在斷層一維轉(zhuǎn)動與地表形變關(guān)系研究的基礎(chǔ)上,推導(dǎo)了彈性半空間均勻介質(zhì)中斷層三維轉(zhuǎn)動與地表形變的關(guān)系,對不同深度和傾角的斷層以不同方式轉(zhuǎn)動產(chǎn)生的地表形變的曲線變化特征進行了分析,計算了斷層以不同方式轉(zhuǎn)動產(chǎn)生的地表水平位移和垂直形變的空間分布特征,結(jié)果表明:1)斷層轉(zhuǎn)動對地表位移的影響隨著斷層深度的增加不斷衰減,地表位移對不同傾角的斷層轉(zhuǎn)動有不同的響應(yīng),其中以斷層角點為轉(zhuǎn)動軸的斷層向錯引起的地表形變受傾角的影響最為顯著;2)斷層以不同方式轉(zhuǎn)動相同的量產(chǎn)生的水平位移和垂直形變在數(shù)值上大小相近,垂直形變的空間分布與斷層的轉(zhuǎn)動方式有關(guān);3)斷層三維轉(zhuǎn)動與滑動引起的地表形變在數(shù)值大小上有區(qū)別,但具有相同的量級,空間上斷層滑動引起的形變范圍相對轉(zhuǎn)動較為廣泛。最后,討論了斷層向錯理論在地殼形變分析中存在的問題。
[Abstract]:Based on the theory of fault direction and based on the study of the relationship between one-dimensional fault rotation and surface deformation, the relationship between fault three-dimensional rotation and surface deformation in elastic half-space homogeneous media is derived. The curve variation characteristics of surface deformation caused by different depth and dip angle fault rotation in different ways are analyzed, and the spatial distribution characteristics of surface horizontal displacement and vertical deformation caused by fault rotation in different ways are calculated. The results show that the effect of fault rotation on surface displacement decreases with the increase of fault depth, and the surface displacement has different responses to fault rotation with different dip angles. The surface deformation caused by the fault direction misalignment with the fault corner as the rotation axis is most significantly affected by the dip angle. 2) the horizontal displacement and the vertical deformation caused by the same amount of fault rotation in different ways are similar in numerical value. The spatial distribution of vertical deformation is related to the mode of fault rotation. (3) the surface deformation caused by 3D rotation and sliding of the fault is different in numerical value, but of the same order of magnitude. The range of deformation caused by fault sliding on space is relatively wide. Finally, the problems in crustal deformation analysis based on fault dislocation theory are discussed.
【作者單位】： 長安大學(xué)地質(zhì)工程與測繪學(xué)院;武漢大學(xué)測繪學(xué)院;
【基金】：國家自然科學(xué)基金(41374028;40674001) 國土資源大調(diào)查項目(1212010914015) 中央高�；究蒲袠I(yè)務(wù)費專項資金(CHD2012TD004)~~
【分類號】：P227

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