發(fā)布時(shí)間：2018-06-22 07:23

  本文選題：二連盆地 + 巴音都蘭凹陷��； 參考：《中國(guó)地質(zhì)大學(xué)(北京)》2015年碩士論文

【摘要】：本文利用連片三維地震資料,結(jié)合測(cè)井、鉆資料,以構(gòu)造地質(zhì)學(xué)原理為指導(dǎo),開展了凹陷構(gòu)造特征及演化研究。巴音都蘭凹陷位于馬尼特坳陷東北部,北靠巴音寶力格隆起,巴音都蘭凹陷面積近1200 km2,平面上分為南、中、北三個(gè)次級(jí)洼槽,表現(xiàn)為東南斷、西北超的單斷箕狀凹陷構(gòu)造格局。研究結(jié)果表明:(1)凹陷總體為單斷箕狀結(jié)構(gòu),早期具有雙斷特征,控制著湖盆的分布;(2)凹陷主要發(fā)育三組重要斷層,即東部一級(jí)控凹斷層、斜坡帶控沉積斷層,中部二級(jí)控帶斷層,控制著構(gòu)造帶展布及演化;(3)凹陷主要經(jīng)歷四期構(gòu)造運(yùn)動(dòng),阿爾善時(shí)期斷陷擴(kuò)張伴隨火山活動(dòng)、騰二段斷坳過(guò)渡伴隨構(gòu)造反轉(zhuǎn)是凹陷發(fā)育形成的兩個(gè)重要時(shí)期。(4)根據(jù)斷裂控構(gòu)造、演化控沉積的原則,將凹陷劃分為四個(gè)二級(jí)構(gòu)造單元,各構(gòu)造單元具有明顯差異。(5)巴音都蘭凹陷與二連盆地其它凹陷的構(gòu)造演化特征大致相近,是一個(gè)長(zhǎng)期、繼承性發(fā)育、保存相對(duì)完整的凹陷。在侏羅系末期初具雛形,后期由于燕山期造山運(yùn)動(dòng)的影響,凹陷整體抬升造就現(xiàn)今構(gòu)造格局。凹陷始于燕山運(yùn)動(dòng)中期張裂作用,北東向邊界斷層持續(xù)發(fā)育決定了凹陷東西分帶的構(gòu)造格局,形成了東斷西超的單斷箕狀結(jié)構(gòu),白堊系巴彥花群地層沉積時(shí)期為凹陷發(fā)育的鼎盛時(shí)期,從構(gòu)造演化及控沉積特征上,構(gòu)造演化發(fā)育為4個(gè)階段:裂陷初期、裂陷發(fā)育期、斷坳發(fā)育期、萎縮期。(6)研究區(qū)是發(fā)育在古生界基底上的斷陷型凹陷,主要沉積了一套下白堊統(tǒng)的碎屑巖,下白堊統(tǒng)總體構(gòu)成了一個(gè)大的粗—細(xì)—粗的完整沉積旋回,期間經(jīng)歷了侏羅紀(jì)末期、白堊紀(jì)阿四段沉積末期、騰一段沉積末期、騰二段沉積末期和賽漢塔拉組沉積末期的沉積構(gòu)造事件,相應(yīng)的形成了五次大的區(qū)域性不整合和沉積間斷面,平面上可劃分為扇三角洲、湖泊、水下扇和河流等5個(gè)大相。
[Abstract]:In this paper, the structural characteristics and evolution of the sag are studied under the guidance of the principle of tectonic geology and the combination of logging and drilling data with three dimensional seismic data. The Bayindolan sag is located in the northeast of Manitt depression, bordering on the Bayinborg uplift to the north, with an area of nearly 1200 km ~ 2, and is divided into three sub-troughs in the south, middle and north, showing a structural pattern of a single fault-graben depression in the southeast and in the northwest. The results are as follows: (1) the sag is a single fault graben-like structure, with the characteristics of double faults in the early stage, which controls the distribution of the lake basin, and (2) there are mainly three groups of important faults in the sag, namely, the eastern primary controlled depression fault, the slope belt controlled sedimentary fault, The fault of the secondary controlled zone in the middle of the region controls the distribution and evolution of the tectonic belt. (3) the depression mainly experienced four tectonic movements, and the fault-subsidence extension accompanied by volcanic activity in the Arshan period. The transition of the Teng member fault depression and the structural inversion are two important periods for the development and formation of the depression. (4) according to the principle of fault-controlled structure and evolution-controlled sedimentation, the sag is divided into four secondary tectonic units. (5) the tectonic evolution characteristics of Bayindolan sag and other sag in Erlian basin are similar, which is a long-term, inherited and relatively intact depression. At the end of the Jurassic, the depression was formed in the late stage of Yanshanian orogenic movement, and the whole uplift of the depression resulted in the present tectonic pattern. The depressions began in the middle Yanshanian movement, and the continuous development of the north-east boundary faults determined the tectonic pattern of the east-west zonation of the sag, and formed a single-fault dustpan structure of the east fault and the west superstructure. The sedimentary period of the Cretaceous Bayanhua Group is the peak stage of the sag development. According to the tectonic evolution and controlled sedimentary characteristics, the tectonic evolution is divided into four stages: the early rifting stage, the rifting development period, the fault-depression development period, the tectonic evolution and the depositional development. (6) the study area is a faulted depression developed on the Paleozoic basement, which mainly deposited a set of lower Cretaceous clastic rocks. The Lower Cretaceous generally constituted a large coarse-fine-coarse integrated sedimentary cycle, which experienced the late Jurassic period. The sedimentary tectonic events in the late Cretaceous A4 member, Tengyi formation, Tengyi formation and Sihantala formation formed five large regional unconformities and sedimentary discontinuities. The plane can be divided into fan delta, lake, underwater fan and river.
【學(xué)位授予單位】：中國(guó)地質(zhì)大學(xué)(北京)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：P548

【參考文獻(xiàn)】

相關(guān)期刊論文 前4條

1 任建業(yè),李思田,焦貴浩;二連斷陷盆地群伸展構(gòu)造系統(tǒng)及其發(fā)育的深部背景[J];地球科學(xué);1998年06期

2 靳久強(qiáng),趙文智,薛良清,孟慶任;中國(guó)西北地區(qū)侏羅紀(jì)原型盆地與演化特征[J];地質(zhì)論評(píng);1999年01期

3 杜旭東,漆家福,陸克政,張一偉;大港探區(qū)中生代原型盆地恢復(fù)及成盆模式[J];應(yīng)用基礎(chǔ)與工程科學(xué)學(xué)報(bào);1999年03期

4 李心寧,王同和;二連盆地反轉(zhuǎn)構(gòu)造與油氣[J];中國(guó)海上油氣.地質(zhì);1997年02期

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本文編號(hào)：2052071