【摘要】：構(gòu)造樣式為盆內(nèi)各類構(gòu)造組合的幾何形態(tài)表達(dá),反映了盆地所處應(yīng)力場(chǎng)性質(zhì)變化與構(gòu)造演化過程。本文基于近5年來針對(duì)東海陸架盆地所取得的地震資料解釋成果,并綜合盆地構(gòu)造演化特征及其地球動(dòng)力學(xué)背景,對(duì)盆地內(nèi)中生界構(gòu)造樣式進(jìn)行了系統(tǒng)的分類與總結(jié),詳細(xì)劃分為5類構(gòu)造樣式:伸展構(gòu)造樣式、擠壓構(gòu)造樣式、走滑構(gòu)造樣式、反轉(zhuǎn)構(gòu)造樣式和底辟構(gòu)造樣式,并進(jìn)一步細(xì)化為12種構(gòu)造組合。同時(shí),對(duì)東海陸架盆地內(nèi)西部坳陷、中部低隆起、東部坳陷3個(gè)構(gòu)造單元內(nèi)的中生界構(gòu)造樣式發(fā)育情況分別進(jìn)行了總結(jié),各類構(gòu)造樣式自西至東具有各異的展布特征。綜合盆內(nèi)中生界構(gòu)造樣式幾何學(xué)特點(diǎn)與展布特征可見,由于伊佐奈歧板塊的俯沖、碰撞作用,區(qū)內(nèi)處于擠壓構(gòu)造環(huán)境,進(jìn)而形成了擠壓背斜、斷背斜、正反轉(zhuǎn)等構(gòu)造組合;大洋板塊的后退翻卷及板塊碰撞、俯沖的遠(yuǎn)程效應(yīng)下,區(qū)內(nèi)構(gòu)造環(huán)境以伸展作用為主,形成了一系列NNE向裂陷盆地,發(fā)育了豐富的伸展構(gòu)造組合;走滑-拉分構(gòu)造的發(fā)育較好體現(xiàn)了構(gòu)造環(huán)境的轉(zhuǎn)變,地震剖面上見有花狀斷裂發(fā)育;巖漿底辟構(gòu)造多發(fā)育于拉張環(huán)境下,與斷裂展布息息相關(guān),多沿NE-NNE向斷裂展布。此外,新生代多期構(gòu)造運(yùn)動(dòng)是影響中生界構(gòu)造樣式發(fā)育展布的重要因素。
[Abstract]:The structural style is the geometric expression of various structural combinations in the basin, which reflects the change of the stress field in the basin and the evolution of the tectonic evolution. Based on the seismic data interpretation results of the continental shelf basin in the East China Sea in the last five years, and the characteristics of the tectonic evolution and the geodynamic background of the basin, the structure style of the basin is classified and summarized in detail. The extension structure style, the extrusion structure style, the walk-slip structure style, the inverted configuration style, and the diapir structure style are further refined into 12 construction combinations. At the same time, the development of the Mesozoic tectonic style in the western depression, the middle-low uplift and the eastern depression in the East China Sea shelf basin are summarized, and various structural styles have different distribution characteristics from the west to the east. in that comprehensive basin, the structural style and the distribution feature of the structure of the oceanic plate are visible, and due to the subduction and the collision effect of the Izoandisambiguation plate, the region is in an extrusion structure environment, so that the structural combination of the extrusion anticline, the fault anticline, the positive inversion and the like is formed, and the backward turning of the oceanic plate and the plate collision are formed, Under the remote effect of subduction, the tectonic environment in the region is dominated by the extension, and a series of NNE-to-rift basins are formed, and the rich extension structure combination is developed; the development of the slip-and-pull structure is better than that of the structural environment, and a flower-like fracture development is seen in the seismic section; The diapir structure of the magma is more developed in the tension environment, which is closely related to the distribution of the fracture, and is distributed along the NE-NNE to the fracture. In addition, the Cenozoic multi-period tectonic movement is an important factor in the development and distribution of the Mesozoic tectonic style.
【作者單位】： 中國(guó)地質(zhì)調(diào)查局青島海洋地質(zhì)研究所;國(guó)土資源部海洋油氣資源與環(huán)境地質(zhì)重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家自然科學(xué)基金(41506080;41606050) 中國(guó)地質(zhì)調(diào)查局項(xiàng)目(DD20160153-01;DD20160155-02)
【分類號(hào)】：P736.1

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