本文關(guān)鍵詞：南海北部陸緣古雙峰-筆架碰撞造山帶空間展布特征　出處：《海洋地質(zhì)與第四紀(jì)地質(zhì)》2016年04期 　論文類型：期刊論文

  更多相關(guān)文章： 空間延伸范圍 前新生代地層 構(gòu)造變形 古雙峰-筆架碰撞造山帶 南海北部陸緣

【摘要】：為了解南海北部陸緣古雙峰-筆架碰撞造山帶空間延伸范圍、褶皺和斷裂構(gòu)造發(fā)育特征,通過對研究區(qū)22條多道反射地震剖面資料的地層-構(gòu)造解釋,結(jié)合鉆井巖石地層資料的綜合解釋,運(yùn)用構(gòu)造解析分析法、篩選法以及回剝法對位于南海北部陸緣的古雙峰-筆架碰撞造山帶的構(gòu)造幾何學(xué)基本特征進(jìn)行了研究。綜合分析篩除了新生代構(gòu)造沉降量后的新生代地層底界面(反射地震Tg界面)的空間起伏形態(tài)特征和前新生代地層變形特征發(fā)現(xiàn),古雙峰-筆架碰撞造山帶呈NEE向展布,其核部位于珠江口盆地東南部的陸洋過渡帶下陸坡位置,即06號測線所在位置及其附近,瓊東南盆地為造山帶的NWW翼。此研究結(jié)果可為南海地區(qū)前新生代晚期大地構(gòu)造格局重建、南海成因機(jī)制研究提供構(gòu)造事實觀測依據(jù)。
[Abstract]:In order to understand the spatial extension range of paleo-bimodal penframe collision orogenic belt and the characteristics of fold and fault structure development in the northern continental margin of the South China Sea, the stratigraphic and structural interpretation of 22 multi-channel reflection seismic profiles in the study area was carried out. Combined with the comprehensive interpretation of drilling lithostratigraphic data, structural analytical analysis method is used. The basic structural geometry characteristics of the paleo-bimodal penholder collision orogenic belt located in the northern continental margin of the South China Sea were studied by screening method and stripping method. Comprehensive analysis of the bottom interface of the Cenozoic strata after the Cenozoic tectonic subsidence. (. The spatial fluctuation morphology and the deformation characteristics of the pre-Cenozoic strata are found in the reflection earthquake TG interface. The paleo-bimodal penholder collision orogenic belt is distributed in the NEE direction, and its core is located at the lower slope of the continental and oceanic transitional zone in the southeast of the Pearl River mouth basin, that is, the position of the No. 06 survey line and its vicinity. The Qiongdongnan basin is the NWW wing of the orogenic belt. The results can be used to reconstruct the tectonic framework of the South China Sea in the late Cenozoic and to provide a basis for the observation of tectonic facts in the study of the genetic mechanism of the South China Sea.
【作者單位】： 中國科學(xué)院邊緣海與大洋地質(zhì)重點實驗室中國科學(xué)院南海海洋研究所;中國科學(xué)院大學(xué);
【基金】：國家自然科學(xué)基金項目(41476039;41276048;91328205) 中國海及鄰域地質(zhì)地球物理及地球化學(xué)系列圖項目(GZH200900504-WX02)
【分類號】：P736
【正文快照】： 古雙峰-筆架碰撞造山帶是劉海齡等近年來提出的關(guān)于南海地區(qū)前新生代晚期大地構(gòu)造單元的一個新概念[1]。前人通過對比南海南、北部陸緣中生代地層斷層和褶皺特征,發(fā)現(xiàn)南海北部陸緣發(fā)育自南向北的逆沖推覆,南海南部陸緣發(fā)育自北向南的逆沖推覆的地層-構(gòu)造特征的基礎(chǔ)上初步提出，

本文編號：1369185