發(fā)布時間：2018-05-02 03:22

  本文選題：斷裂形成演化 + 斷裂控制作用��； 參考：《石油實驗地質(zhì)》2017年01期

【摘要】：真武斷裂和吳堡斷裂是蘇北盆地高郵凹陷的2條重要基底先存斷裂,形成于印支期下?lián)P子板塊與華北板塊的俯沖碰撞,西部走向北東東、東部走向北北東。根據(jù)區(qū)域應(yīng)力場、三維地震等資料,將這2條基底斷裂對南部斷階帶形成和演化的控制作用分為4個階段:(1)構(gòu)造擠壓期,由于下?lián)P子區(qū)北部與華北板塊東南部的碰撞,形成了一系列的沖斷構(gòu)造、逆沖推覆及褶皺變形;(2)構(gòu)造反轉(zhuǎn)期,真武斷裂由逆斷層反轉(zhuǎn)為正斷層;(3)正向裂陷期,真1斷層、吳1斷層繼承了真武斷裂分段性特點,真武斷階帶、吳堡斷階帶分別受真1斷層、吳1斷層控制強烈;(4)斜向裂陷期,真武斷階帶、吳堡斷階帶受基底斷裂控制作用逐漸減弱,南北向張應(yīng)力起主導(dǎo)作用。真武斷階帶和吳堡斷階帶存在著構(gòu)造差異變形,根據(jù)基底先存斷裂對新生斷裂的活動方式可分為4種類型,由強至弱依次分為繼承型、派生型、調(diào)節(jié)型、誘導(dǎo)型。研究表明,基底先存斷裂是高郵凹陷南部斷階帶形成演化的基礎(chǔ),并強烈影響著新生斷裂的發(fā)育。
[Abstract]:The Zhenwu fault and the Wubao fault are two important basement pre-existing faults in Gaoyou depression of Subei basin, which formed in the subduction collision between the Lower Yangtze Plate and North China Plate in the Indosinian period, and strike north to west and north to east in the west and north to east of the basin. Based on the regional stress field and 3D seismic data, the controlling effects of the two basement faults on the formation and evolution of the southern fault terrace are divided into four stages: 1) tectonic compression period, due to the collision between the northern part of the Lower Yangtze region and the southeast of the North China plate. A series of thrust structures, thrust nappe and fold deformations are formed during the inversion period, and the Zhenwu fault is reversed from the reverse fault to the normal fault in the normal faulting stage, the true 1 fault and the Wu 1 fault inherit the segmental characteristics of the Zhenwu fault and the Zhenwu fault terrace zone. The Wubao fault terrace zone is controlled by the true 1 fault and the Wu 1 fault strongly controlled by the fault. (4) the diagonal rifting period, the Zhenwu fault terrace zone and the Wubao fault terrace zone are gradually weakened by the basement fault, and the south and north direction tensile stress play the leading role. There are tectonic differential deformation in the Zhenwu fault terrace zone and the Wubao fault terrace zone. According to the activity patterns of the basement pre-existing faults to the new faults, they can be divided into four types, from the strong to the weak, which are divided into inheritance type, derivative type, regulating type and inductive type in turn. The study shows that the basement preexisting fault is the basis of the formation and evolution of the southern fault terrace in Gaoyou sag and strongly affects the development of the new fault.
【作者單位】： 中國地質(zhì)大學(xué)(北京)地球科學(xué)與資源學(xué)院;中國石油勘探開發(fā)研究院;
【基金】：國家科技重大專項(2011ZX05028,2011ZX05009-002)資助
【分類號】：P618.13

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本文編號：1832169