本文選題：東海陸架盆地 + 中生界��； 參考：《中國(guó)海洋大學(xué)》2014年博士論文

【摘要】：東海陸架盆地位于東亞大陸邊緣，是一個(gè)疊置在華南陸塊之上的中、新生代疊合含油氣盆地。論文研究區(qū)主要位于東海陸架盆地南部，包括新生代的甌江凹陷、雁蕩低凸起、閩江凹陷、臺(tái)北低凸起、基隆凹陷、臺(tái)西盆地及新竹凹陷等構(gòu)造單元，面積約12×104km2。 由于前期研究重點(diǎn)放在新生代地層及構(gòu)造，對(duì)東海陸架盆地南部中生代地層分布及構(gòu)造特征并不清楚，嚴(yán)重制約了對(duì)華南大陸中生代構(gòu)造格局及地球動(dòng)力學(xué)過(guò)程的認(rèn)識(shí)�；谏鲜鰡�(wèn)題，本論文充分收集整理了華南東部陸區(qū)和東海陸架盆地有關(guān)中生代地質(zhì)文獻(xiàn)資料，并實(shí)地考察了浙閩沿海中生界露頭，參與東海陸架盆地南部16000km的二維地震剖面解釋工作，編制了中生界厚度圖、深度圖、構(gòu)造單元區(qū)劃圖、斷裂體系圖及平衡剖面圖，系統(tǒng)研究了東海陸架盆地南部中生界分布特征，分析了中生代構(gòu)造特征，，并通過(guò)與華南陸區(qū)海陸對(duì)比研究，提出了東海陸架盆地中生代構(gòu)造演化的3階段模式。主要成果及認(rèn)識(shí)如下： 1．印支運(yùn)動(dòng)后，華南陸區(qū)中生代地層發(fā)育，東部的浙、閩、粵陸區(qū)主要發(fā)育有3個(gè)大的區(qū)域性不整合，即中侏羅世與晚侏羅世之間的不整合、早白堊世早期與早白堊世晚期之間的不整合、晚白堊世與古近紀(jì)之間的不整合，分別對(duì)應(yīng)燕山期的3幕運(yùn)動(dòng)。 2．東海陸架盆地南部地震剖面上可以識(shí)別出T02、T03、T04、T05、T06、Tg等6個(gè)地震反射波組，其中T02、T04、T05、T06和Tg為5個(gè)不整合面，將研究區(qū)劃分為I、II、III、IV、V等5個(gè)地震層序，分別對(duì)應(yīng)第四系～新近系、古近系、白堊系、侏羅系和前中生界。 3．研究區(qū)中生界總體呈北東向展布，西部的甌江—麗水?dāng)嘞輲?nèi)中生界厚約1000～2500m，最大殘留厚度可達(dá)3000m，主要發(fā)育白堊系，缺失侏羅系。雁蕩低凸起帶北部殘留了400～1500m厚的白堊系，南部殘留了200～800m厚的白堊系。中部的閩江—廈澎斜坡帶內(nèi)中生界厚約2000～5000m，最大厚度5500m，侏羅系和白堊系皆有分布。東部的基隆—新竹斷陷帶內(nèi)廣泛發(fā)育了侏羅系和白堊系，中生界厚約3000～7000m，最厚可達(dá)8000m，為中生界沉降中心。從侏羅紀(jì)到白堊紀(jì)中生界沉降中心具有自西向東遷移規(guī)律。 4．通過(guò)區(qū)域海陸對(duì)比把海域內(nèi)原來(lái)屬晚侏羅世的廈門(mén)組劃為中侏羅世，提出東海陸架盆地可能缺失晚侏羅世-早白堊世早期的火山-沉積地層。 5．根據(jù)沉積特征及變形特征將東海陸架南部中生代盆地劃分為甌江－麗水?dāng)嘞輲�、雁蕩低凸起帶、閩江－廈澎斜坡帶和基�。轮癜枷輲�4個(gè)次級(jí)中生代構(gòu)造單元；中生代主要發(fā)育北東－北北東向和近東西向斷裂，以及4類(lèi)構(gòu)造樣式；東海陸架中生代主要經(jīng)歷了基隆運(yùn)動(dòng)、漁山運(yùn)動(dòng)和雁蕩運(yùn)動(dòng)，大致對(duì)應(yīng)華南陸區(qū)的印支運(yùn)動(dòng)、燕山Ⅱ幕運(yùn)動(dòng)和燕山Ⅲ幕運(yùn)動(dòng)。 6．通過(guò)地震剖面對(duì)比解釋，厘定了東海陸架侏羅紀(jì)和白堊紀(jì)殘留盆地的邊界，侏羅紀(jì)盆地為坳陷型盆地，白堊紀(jì)盆地為斷陷型盆地。 7．通過(guò)構(gòu)造演化剖面恢復(fù)并結(jié)合區(qū)域海陸構(gòu)造對(duì)比，將東海陸架盆地南部中生代演化過(guò)程劃分為晚三疊世－中侏羅世被動(dòng)大陸邊緣坳陷盆地階段、晚侏羅世－早白堊世早期安第斯型主動(dòng)大陸邊緣島弧隆升階段、早白堊世晚期－晚白堊世西太平洋型主動(dòng)大陸邊緣弧后伸展盆地階段。
[Abstract]:The continental shelf basin of the East China Sea is located on the continental margin of East Asia . It is a Mesozoic - Cenozoic superimposed petroleum - bearing basin superimposed on the continental margin of East China . The research area is mainly located in the southern part of the shelf basin of the East China Sea , including the Oujiang sag in the Cenozoic , the Yanao low - uplift , the Min River depression , the Taibei low - uplift , Keelung depression , Taixi basin and Xinzhu sag , etc . , with an area of about 12 脳 104km2 .

Based on the above - mentioned problems , this paper systematically studies the Mesozoic tectonic pattern and the geodynamic process in the southern China continental shelf basin . Based on the above - mentioned problems , this paper studies the Mesozoic tectonic characteristics of the East China Sea shelf basin and the two - dimensional seismic section interpretation work in the south of the East China Sea Shelf Basin . The paper studies the Mesozoic tectonic characteristics and the three - stage mode of Mesozoic tectonic evolution in the East China Sea shelf basin .

1 . After the Indo - China movement , there are three major regional inconformity in the Mesozoic strata in the southern part of the South China , namely , the inconformity between the Middle Jurassic and the late Jurassic , the inconformity between the early Cretaceous and the late Cretaceous , the inconformity between the early Cretaceous and the late Cretaceous , and the non - integration between the Late Cretaceous and the Early Cretaceous , which correspond to the three curtain movements of the Yanshan period respectively .

2 . In the southern seismic section of the East China Sea Shelf Basin , there are 6 seismic reflection wave groups , such as T03 , T04 , T05 , T06 and Tg . Among them , there are 5 unconformable surfaces , such as T04 , T05 , T06 and Tg , which are divided into five seismic sequences , namely I , II , III , IV , V , respectively .

3 . The Mesozoic boundary is about 1000 锝

本文編號(hào)：1904560