本文選題：構(gòu)造-沉積環(huán)境　切入點(diǎn)：原型盆地　出處：《地學(xué)前緣》2017年05期 　論文類型：期刊論文

【摘要】：塔里木盆地晚奧陶世構(gòu)造-沉積環(huán)境經(jīng)歷了快速而劇烈的變化,恢復(fù)該時(shí)期盆地原型有助于揭示盆地充填演化和盆山耦合。利用最新的鉆井、地震及露頭資料以沉積相為研究實(shí)體,將盆地充填與周緣構(gòu)造演化相結(jié)合,由點(diǎn)→線→面進(jìn)行分析,恢復(fù)了塔里木盆地晚奧陶世不同時(shí)期(以組為單位)的構(gòu)造-沉積環(huán)境,并建立了相應(yīng)的盆地充填演化和盆山耦合樣式。吐木休克組沉積期,塔里木盆地西部發(fā)育淹沒(méi)臺(tái)地-深水臺(tái)盆沉積體系,巴楚—塔中和塘南為暴露剝蝕區(qū);良里塔格組沉積期,盆地西部發(fā)育開(kāi)闊臺(tái)地-深水臺(tái)盆沉積體系,其中玉北東部—塘古巴斯碳酸鹽巖臺(tái)盆反轉(zhuǎn)為濁流盆地;桑塔木組沉積期,盆地西部發(fā)育混積陸棚-濁流盆地沉積體系,僅在柯坪發(fā)育欠補(bǔ)償沉積;鐵熱克阿瓦提組沉積期,盆地西部廣大地區(qū)為暴露剝蝕區(qū),并發(fā)育碎屑濱岸-陸棚沉積體系。吐木休克組-桑塔木組沉積期,塔里木盆地東部持續(xù)發(fā)育深水濁流沉積體系;鐵熱克阿瓦提組沉積期,演變?yōu)樗樾缄懪锍练e體系。研究認(rèn)為塔里木盆地晚奧陶世在東西分異的臺(tái)-盆格局基礎(chǔ)上疊加了南北分異的隆-坳格局:吐木休克組沉積期,盆地西部差異升降顯著,南北向隆-坳相間的格局初步形成;良里塔格組-桑塔木組沉積期,盆地發(fā)生整體的沉降與充填,沉積格局由西厚東薄反轉(zhuǎn)為東厚西薄;鐵熱克阿瓦提組沉積期,盆地南部和北部發(fā)生強(qiáng)烈隆升,古地理格局具南北陸中間海的特征,南北向隆-坳相間的格局定型。在塔里木地塊與南部島弧耦合作用不斷加強(qiáng)的背景下,大量陸源碎屑的注入和盆內(nèi)差異升降作用使得晚奧陶世構(gòu)造-沉積環(huán)境發(fā)生了快速變遷。奧陶紀(jì)末,在南北雙向擠壓背景下,大規(guī)模的海退和盆內(nèi)物源區(qū)的出現(xiàn)使得塔里木盆地結(jié)束了震旦紀(jì)以來(lái)碳酸鹽巖大面積發(fā)育的歷史,標(biāo)志著盆地演化進(jìn)入一個(gè)新的階段。
[Abstract]:The late Ordovician tectonic-sedimentary environment in the Tarim Basin has undergone rapid and drastic changes. The restoration of the basin prototype during this period is helpful to reveal the basin filling evolution and basin-mountain coupling. Seismic and outcrop data take sedimentary facies as research entities, combining basin filling with peripheral tectonic evolution. 鈫扡ine. 鈫扵he tectonic-sedimentary environment of the late Ordovician in Tarim Basin has been restored, and the corresponding basin filling evolution and basin-mountain coupling pattern have been established. In the western part of Tarim Basin, submergence platform and deep water platform basin sedimentary system are developed, and Bachu-Tazhong and Tangnan are the exposed denudation areas, and in the sedimentary period of Lianglitag formation, the depositional system of open platform and deep water platform basin is developed in the western part of the basin. The sedimentary system of mixed continental shelf and turbidite basin developed in the western part of the basin, only in Keping, the sedimentary period of Tiereke Awati formation, the sedimentary period of Tiereke Awati formation, the sedimentary system of mixed continental shelf and turbid current basin developed in the western part of the basin. The western part of the basin is an exposed denudation area and developed a detrital shore-shelf sedimentary system. During the sedimentary period of Tumu shock formation and Santamu formation, Deepwater turbidite sedimentary system continued to develop in the eastern part of Tarim Basin, and the depositional period of Tierak Awati formation. It is considered that the late Ordovician superimposed the north-south differential uplift-depression pattern on the basis of the east-west differentiation of the Tai-basin pattern in the Tarim Basin: during the deposition period of the Tumu shock formation, the difference in the western part of the basin increased significantly. During the sedimentary period of Lianglitage-Santamu formation, the whole subsidence and filling occurred in the basin, and the sedimentary pattern was reversed from the west thick to the east thick to the east thick to the west thin, the depositional period of the Tierak Awati formation, the depositional period of the Tierek Awati formation, and the depositional period of the Tiereke Awati formation, A strong uplift occurred in the south and north of the basin, the paleogeographic pattern was characterized by the mid-sea between the North and the South, and the north-south uplift-depression pattern was shaped. In the context of the increasing coupling between the Tarim block and the southern island arc, The injection of a large amount of continental clastic and the differential rise and fall in the basin make the tectonic-sedimentary environment of the late Ordovician change rapidly. At the end of Ordovician, under the background of the bi-directional compression of the north and the south, The large-scale regression and the occurrence of the source area of the basin make the Tarim basin end the history of the large area development of carbonate rock since the Sinian, indicating that the evolution of the basin has entered a new stage.
【作者單位】： 中國(guó)石油勘探開(kāi)發(fā)研究院;中國(guó)地質(zhì)大學(xué)(北京)能源學(xué)院;中國(guó)石油天然氣勘探開(kāi)發(fā)公司;
【基金】：國(guó)家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃“973”項(xiàng)目(2011CB201101) 中國(guó)地質(zhì)調(diào)查局地質(zhì)調(diào)查項(xiàng)目(1212011220761) 國(guó)家重大科技專項(xiàng)(2016ZX05029)
【分類號(hào)】：P534.42

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