本文關(guān)鍵詞：準(zhǔn)噶爾盆地東南緣中—新生代盆山關(guān)系及構(gòu)造演化過程　出處：《浙江大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 準(zhǔn)噶爾東南緣 依連哈比爾尕山 柴窩堡凹陷 博格達(dá)山 構(gòu)造變形 構(gòu)造-沉積過程 構(gòu)造演化 中-新生代

【摘要】：準(zhǔn)噶爾盆地東南緣由依連哈比爾尕山、柴窩堡凹陷,博格達(dá)山和博格達(dá)山北緣構(gòu)造帶所構(gòu)成,呈現(xiàn)出盆地和山脈鑲嵌的格局,構(gòu)成了獨(dú)具特色的復(fù)雜地質(zhì)結(jié)構(gòu)和構(gòu)造演化過程。對其中-新生代變形特征及構(gòu)造演化的研究,將對揭示天山北緣中-新生代陸內(nèi)變形機(jī)制和提高該區(qū)油氣勘探的認(rèn)識具有重要意義。本文通過對準(zhǔn)噶爾盆地東南緣的構(gòu)造變形特征以及沉積充填特征進(jìn)行研究,結(jié)合造山帶隆升史,分析準(zhǔn)噶爾盆地東南緣地區(qū)的構(gòu)造演化特征,探討其整體演化過程,并初步取得了如下主要認(rèn)識:1.博格達(dá)山南緣柴窩堡凹陷內(nèi)識別出三期不整合,分別是侏羅系與三疊系(J/T),古近系與侏羅系(E/J),上新統(tǒng)與中新統(tǒng)之間的不整合(N2/N1),厘定柴窩堡凹陷中-新生代至少經(jīng)歷了晚三疊世末期,侏羅紀(jì)-古近紀(jì)之間,中新世末期三期構(gòu)造變形;而博格達(dá)山北緣構(gòu)造帶識別出侏羅系與三疊系(J/T),白堊系與侏羅系(K/J),古近系與白堊系(E/K)以及上新統(tǒng)與中新統(tǒng)(N2/N1)四期不整合,厘定出晚三疊世末期、晚侏羅世末期、晚白堊世末期和中新世末期這四期構(gòu)造變形事件。2.準(zhǔn)噶爾東南緣地區(qū)基本變形結(jié)構(gòu)主要受深層滑脫斷層向北擴(kuò)展所控制:依連哈比爾尕山向北擠壓的過程中,在其北側(cè)山前發(fā)育基底卷入斷層;擠壓應(yīng)力由南往北沿深部滑脫斷層傳播到博格達(dá)山,在其南側(cè)形成向南的反沖斷層及其斷層相關(guān)褶皺;逆沖作用繼續(xù)沿滑脫斷層向北傳播,在博格達(dá)山北側(cè)形成向北的逆沖斷層及其斷層相關(guān)褶皺。柴窩堡凹陷的總體結(jié)構(gòu)表現(xiàn)為南北對沖的構(gòu)造三角帶;而博格達(dá)山整體呈扇形表現(xiàn)為類似沖起構(gòu)造。3.中-晚侏羅世構(gòu)造與沉積響應(yīng)模式可用楔頂沉積進(jìn)行解釋:中-晚侏羅世博恪達(dá)山北緣逆斷層強(qiáng)烈沖斷,導(dǎo)致柴窩堡凹陷和博格達(dá)山整體抬升,處于楔頂位置,沉積厚度薄的河流相沉積,此時博格達(dá)山北緣構(gòu)造帶位置處于前淵坳陷,沉積了厚度較大的湖相沉積體系,造成侏羅系在博格達(dá)山南北緣的巨大沉積差異;上新世以來的構(gòu)造變形表現(xiàn)為依連哈比爾尕山北緣和博格達(dá)山北緣強(qiáng)烈沖斷,導(dǎo)致山前地層發(fā)生撓曲下沉,上新統(tǒng)及第四系沉積南厚北薄,整體呈前陸盆地特征。柴窩堡凹陷可能為沖斷帶內(nèi)背馱盆地,博格達(dá)山北緣構(gòu)造帶北部地區(qū)屬于前淵坳陷。4.提出準(zhǔn)噶爾盆地東南緣中-新生代演化過程:三疊系在準(zhǔn)噶爾東南緣接受整體拗陷沉降,晚三疊世末博格達(dá)山隆起成為低隆;早-中侏羅世研究區(qū)為伸展坳陷,中-晚侏羅世發(fā)育楔頂沉積,造成博格達(dá)山南北緣侏羅系巨大沉積差異,侏羅末博格達(dá)山強(qiáng)烈隆升;白堊紀(jì)柴窩堡處于較高位置,不接受沉積,而博格達(dá)山北緣沉積白堊系;進(jìn)入古近系研究區(qū)發(fā)育拗陷沉積,中新世末依連哈比爾尕山及博格達(dá)山北緣山前地層強(qiáng)烈撓曲下沉,上新統(tǒng)以來地層沉積南厚北薄,柴窩堡凹陷為背馱盆地,北緣構(gòu)造帶北部地區(qū)屬于前淵坳陷。
[Abstract]:The southeast of Junggar basin is composed of the structural belts of the northern margin of Ylianhabigashan, Chaiwopu sag, Bogda mountain and bogda mountain, showing the pattern of basin and mountain mosaic. It constitutes a unique complex geological structure and tectonic evolution process. The study of deformation characteristics and tectonic evolution of the Mesozoic and Cenozoic. It will be of great significance to reveal the deformation mechanism of Mesozoic and Cenozoic in the northern margin of Tianshan Mountain and to improve the understanding of oil and gas exploration in this area. This paper studies the structural deformation characteristics and sedimentary filling characteristics of the southeastern margin of Junggar Basin. . Based on the uplift history of the orogenic belt, the structural evolution characteristics of the southeastern margin of Junggar Basin are analyzed, and the overall evolution process is discussed. The main results are as follows: 1. Three unconformities have been identified in Chaiwopu sag in the southern margin of Bogda Mountain, namely, Jurassic and Triassic J / T, Paleogene and Jurassic E / J). The unconformity between Pliocene and Miocene (N _ 2 / N _ 1) indicates that the Mesozoic to Cenozoic in Chaihuopu sag experienced at least the late Triassic, Jurassic-Paleogene, and late Miocene tectonic deformations. On the other hand, the northern margin of Bogda Mountain identified Jurassic and Triassic J / T, Cretaceous and Jurassic K / J). The four unconformity periods of Paleogene and Cretaceous (E / K) and Pliocene and Miocene (N _ 2 / N _ 1) determined the late late Triassic and the late Jurassic. The four tectonic deformation events of the late late Cretaceous and the late Miocene. 2. The basic deformation structure in the southeast margin of Junggar is mainly controlled by the northward extension of the deep detachment fault. In the course of the northward extrusion of Ilenhabilga Mountain. The basement involvement fault is developed in the north side of the mountain front; The compressive stress propagates from south to north along the deep slip fault to Bogda Mountain and forms southward recoil fault and its related fold in the south side. The thrust continued to propagate northward along the slip fault and formed a northward thrust fault and its related folds on the north side of the Bogda Mountains. The whole Bogda Mountain is fan-shaped. 3. Middle-Late Jurassic tectonics and sedimentary response model can be explained by wedge top deposition: the thrust fault in the northern margin of Middle-Late Jurassic Shikeda Mountain. As a result, Chaiwopu sag and Bogda Mountain are uplifted at the top of the wedge and deposited in fluvial facies with thin thickness. At this time, the northern margin of Bogda Mountain tectonic belt is located in the Qianyuan Depression. The thicker lacustrine sedimentary system resulted in the huge difference of Jurassic in the north and south margin of Bogda Mountain. The tectonic deformation since the Pliocene is characterized by a strong thrust on the northern margin of the Ilenhabierga Mountains and the northern margin of the Bogda Mountains, resulting in the flexural subsidence of the strata in front of the mountains, and the thickness of the Pliocene and Quaternary deposits in the south and north. The whole is a Foreland basin. Chaiwopu depression may be a piggyback basin in the thrust belt. The northern part of the northern Bogdashan tectonic belt belongs to the Qianyuan Depression. 4. The Meso-Cenozoic evolution process of the southeastern margin of Junggar Basin is put forward: the Triassic system accepts the whole depression subsidence in the southeast margin of Junggar Basin. At the end of the late Triassic, the Bogda mountain uplift became low uplift; The early and middle Jurassic study area is an extensional depression, and the middle to late Jurassic developed wedge top deposition, which resulted in the huge difference of Jurassic deposits in the north and south margin of the Bogda Mountains, and the strong uplift of the Bogda Mountains in the late Jurassic. The Cretaceous Chaiwopoubao was in a higher position and did not accept the deposits, while the Cretaceous was deposited in the northern margin of the Bogda Mountains. In the Paleogene study area, the depressions were developed, the Piedmont strata in the northern margin of Ylianhabigashan and Bogda Mountains in late Miocene were strongly flexural and subsided, the deposits since the Pliocene were thin in the south and north, and the Chaiwopu depression was a piggyback basin. The northern part of the northern margin of the tectonic belt belongs to the Qianyuan Depression.
【學(xué)位授予單位】：浙江大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：P542

【相似文獻(xiàn)】

相關(guān)期刊論文 前5條

1 胡建民,宋子新,郭力宇;武當(dāng)山北部南化塘地區(qū)地質(zhì)構(gòu)造演化過程[J];湖北地礦;1998年01期

2 呂明;湯良杰;岳勇;;塔里木盆地西南部麥蓋提斜坡構(gòu)造演化過程的記錄——生長地層及生長不整合[J];地質(zhì)論評;2014年01期

3 張克鑫,漆家福,馬寶軍,楊橋;濟(jì)陽坳陷樁海地區(qū)構(gòu)造演化特征研究[J];西安石油大學(xué)學(xué)報(自然科學(xué)版);2005年03期

4 孫國強(qiáng);鄭建京;蘇龍;劉興旺;楊鑫;劉玉虎;;柴達(dá)木盆地西北區(qū)中—新生代構(gòu)造演化過程研究[J];天然氣地球科學(xué);2010年02期

5 李理;如何指導(dǎo)普通地質(zhì)認(rèn)識實(shí)習(xí)[J];石油教育;2005年03期

相關(guān)會議論文 前1條

1 孫龍濤;周蒂;孫珍;;禮樂盆地沉積地層特征及其構(gòu)造演化過程[A];中國地球物理學(xué)會第二十三屆年會論文集[C];2007年

相關(guān)碩士學(xué)位論文 前2條

1 朱晨濤;準(zhǔn)噶爾盆地東南緣中—新生代盆山關(guān)系及構(gòu)造演化過程[D];浙江大學(xué);2017年

2 劉成軍;秦祁結(jié)合部位物質(zhì)組成、構(gòu)造演化過程及交接關(guān)系研究[D];長安大學(xué);2013年

，

本文編號：1428798