本文選題：塔里木盆地 + 庫(kù)魯克塔格　； 參考：《巖石學(xué)報(bào)》2017年04期

【摘要】：庫(kù)魯克塔格地區(qū)保存了相對(duì)完整的寒武紀(jì)-奧陶紀(jì)沉積地層,其沉積特征及演化規(guī)律的研究,對(duì)塔東地區(qū)寒武系-奧陶系油氣勘探具有重要意義。通過(guò)庫(kù)魯克塔格地區(qū)詳細(xì)的野外地質(zhì)調(diào)查,結(jié)合前人相關(guān)研究成果,對(duì)該區(qū)寒武系-奧陶系沉積體系、沉積模式及演化規(guī)律的研究表明,寒武紀(jì)時(shí)期,庫(kù)魯克塔格地區(qū)經(jīng)歷了一次大的海侵-海退旋回,南、北兩區(qū)沉積具有相似性。寒武紀(jì)早期的快速海侵導(dǎo)致南、北兩區(qū)均發(fā)育陸棚相-深水盆地相沉積;寒武紀(jì)晚期,在逐漸海退的背景下,南、北兩區(qū)開(kāi)始出現(xiàn)沉積分異。奧陶紀(jì),經(jīng)歷了新一輪大的海侵-海退旋回,南北兩區(qū)沉積差異顯著。北區(qū)從早奧陶世到晚奧陶世,發(fā)育臺(tái)地邊緣斜坡相-廣海陸棚相-緩斜坡相-臺(tái)地邊緣礁灘相-開(kāi)闊臺(tái)地相相序,構(gòu)成整體向上變淺的碳酸鹽巖沉積層序;而南區(qū)發(fā)育深水盆地相-陸棚斜坡相-濁流盆地相-碎屑陸棚相相序,形成一套巨厚的深水復(fù)理石建造。庫(kù)魯克塔格地區(qū)寒武紀(jì)時(shí)期發(fā)育緩坡型碳酸鹽巖臺(tái)地,因臺(tái)地不斷向南構(gòu)筑以及斷裂活動(dòng),導(dǎo)致奧陶紀(jì)晚期臺(tái)地邊緣快速變陡,并在經(jīng)歷斜坡相快速堆積填平補(bǔ)齊之后,重新演變?yōu)榫徠滦吞妓猁}巖臺(tái)地。晚奧陶世,由于周緣構(gòu)造活動(dòng)影響,卻爾卻克山-雅爾當(dāng)山一帶下沉,逐漸向遠(yuǎn)端變陡緩坡型碳酸鹽巖臺(tái)地演化。
[Abstract]:The relatively complete Cambrian-Ordovician sedimentary strata have been preserved in the Kuruktag area. The study of their sedimentary characteristics and evolution rules is of great significance to the exploration of Cambrian-Ordovician oil and gas in the Tadong area. Based on the detailed field geological survey in Kuluktag area and previous related research results, the study of Cambrian-Ordovician sedimentary system, sedimentary model and evolution law shows that the Cambrian period, The Kuluktag area experienced a large transgression-sea regressive cycle, and the deposits in the south and north areas are similar. The early Cambrian rapid transgression resulted in the continental shelf facies and deep water basin facies deposits in both the north and the south, and in the late Cambrian, sedimentary differentiation began to occur in the southern and northern regions under the background of gradual regression. During the Ordovician period, there was a new round of transgression and regression cycle, and there were significant differences between the two regions. From early Ordovician to late Ordovician, platform margin slope facies, wide sea shelf facies, gentle slope facies, platform edge reef beach facies and open platform facies are developed in the northern region, forming a whole upward shallower carbonate sedimentary sequence. However, the deep water basin facies, shelf slope facies, turbidite basin facies and clastic shelf facies are developed in the southern region, forming a set of thick deep-water clayestone formations. During the Cambrian period of the Kuruktag area, gentle slope carbonate platform was developed. Because of the continuous southward construction of the platform and the activity of faults, the platform margin of the late Ordovician quickly steeped, and after the rapid accumulation of the slope facies, It has been redeveloped into a gentle slope carbonate platform. In the late Ordovician, due to the influence of the peripheral tectonic activity, the area of the Choltsoke-Yaldang Mountains sank and gradually evolved to the distal carbonate platform with steepening and gentle slope.
【作者單位】： 北京大學(xué)地球與空間科學(xué)學(xué)院;北京大學(xué)石油與天然氣研究中心;塔里木油田勘探開(kāi)發(fā)研究院;成都理工大學(xué)油氣藏地質(zhì)及開(kāi)發(fā)工程國(guó)家重點(diǎn)實(shí)驗(yàn)室;
【基金】：中國(guó)地質(zhì)調(diào)查局項(xiàng)目(DD20160175-1-1) 國(guó)家自然科學(xué)基金項(xiàng)目(41272137、41572117)聯(lián)合資助
【分類(lèi)號(hào)】：P534.4;P618.13

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