本文關(guān)鍵詞： 新元古代 裂谷 南北分異 下寒武統(tǒng) 塔里木盆地 烴源巖　出處：《石油學(xué)報(bào)》2017年03期 　論文類型：期刊論文

【摘要】：綜合航磁、地震、地質(zhì)和地球化學(xué)資料,研究了塔里木新元古代裂谷盆地南北分異的表層構(gòu)造、沉積、分布特征及深層動(dòng)力學(xué)機(jī)制,揭示了裂谷盆地演化及其對(duì)寒武紀(jì)早期沉積盆地和深層烴源巖分布的控制作用。塔里木南部裂谷盆地是羅迪尼亞超大陸裂解早期超級(jí)地幔柱活動(dòng)的產(chǎn)物,開啟于南華紀(jì)早期(約780 Ma),表現(xiàn)為深入塔里木盆地內(nèi)部的NE向坳拉槽,而北部裂谷是泛羅迪尼亞大洋板塊俯沖產(chǎn)生的弧后裂谷盆地,開啟于南華紀(jì)后期(約740 Ma),呈近EW向狹長帶狀橫穿整個(gè)塔里木盆地。塔里木北部新元古代弧后裂谷盆地與東亞地區(qū)晚中生代—新生代弧后裂谷盆地群的形成和演化過程十分相似,均顯示向洋遷移的演化特征,但塔里木裂谷盆地從早期的斷陷-拗陷最終演化成被動(dòng)陸緣。塔里木新元古代裂谷盆地不僅決定同裂谷期烴源巖的分布,更控制早寒武世沉積盆地的發(fā)育,使得后者"向前相似",在現(xiàn)今塔北隆起與中央隆起帶之間很可能發(fā)育近EW向展布的南華系—震旦系同裂谷期和下寒武統(tǒng)玉爾吐斯組沉積期后裂谷期烴源巖。
[Abstract]:Combined with aeromagnetic, seismic, geological and geochemical data, the surface structure, deposition, distribution characteristics and deep dynamic mechanism of the north-south differentiation of the Neoproterozoic rift basin in Tarim were studied. It is revealed that the evolution of rift basin and its control on the distribution of early Cambrian sedimentary basins and deep hydrocarbon source rocks. The southern Tarim rift basin is the product of the supermantle plume activity in the early stage of the division of the Rodinian supercontinent. It was opened in the early South China (about 780 Mai), which is represented by the NE trench deep inside the Tarim basin, while the northern rift is a back-arc rift basin caused by the subduction of the pan-Rhodinia oceanic plate. It was opened in the late South China (about 740 Ma), with a narrow and narrow band near EW across the whole Tarim basin. Formation and formation of Neoproterozoic Rear Arc Rift Basin in Northern Tarim and late Mesozoic to Cenozoic Back-Arc Rift Basin Group in East Asia. The process is very similar. But the Tarim rift basin evolved from the early fault-depression to the passive continental margin. The Tarim Neoproterozoic rift basin not only determined the distribution of the source rocks in the same rift period, but also developed into a passive continental margin. Controlling the development of early Cambrian sedimentary basins, This makes the latter "forward similar", and the source rocks of the South China and Sinian synrift periods and the lower Cambrian Yultui formation depositional period are likely to be developed between the present Tarim uplift and the central uplift belt in the near EW-trending direction of the South China system and the post-rift period of the Lower Cambrian Yultuisi formation.
【作者單位】： 中國石油勘探開發(fā)研究院;
【基金】：中國石油天然氣股份有限公司“油氣勘探新領(lǐng)域、新理論、新方法、新技術(shù)研究”項(xiàng)目(2014A-02) 中國博士后科學(xué)基金項(xiàng)目(2015M581129)資助
【分類號(hào)】：P618.13

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本文編號(hào)：1500638