發(fā)布時(shí)間：2018-04-02 10:03

  本文選題：營(yíng)城組　切入點(diǎn)：沉積相　出處：《地學(xué)前緣》2017年01期

【摘要】：中國(guó)白堊紀(jì)大陸科學(xué)鉆探松科2井連續(xù)獲取營(yíng)城組巖心365.32m,巖心直徑為214mm,巖心收獲率達(dá)98.47%,是迄今直徑最大,收獲率最高且保存最為完整的營(yíng)城組巖心,這些寶貴資料為營(yíng)城組研究提供了前所未有的機(jī)遇。營(yíng)城組時(shí)期與Aptian-Albian對(duì)應(yīng)。通過(guò)對(duì)松科2井營(yíng)城組巖心的精細(xì)描述,揭示了營(yíng)城組火山-沉積序列及其建造過(guò)程。營(yíng)城組主要包括沉積巖與火山巖兩大巖類(lèi),共計(jì)17種巖石類(lèi)型,其中沉積巖9種(礫巖、粗砂巖、中砂巖、細(xì)砂巖、粉砂巖、粉砂質(zhì)泥巖、泥巖,含角礫凝灰質(zhì)砂巖、凝灰質(zhì)砂巖)、火山巖類(lèi)8種(流紋巖、流紋質(zhì)角礫集塊巖、流紋質(zhì)角礫集塊熔巖、流紋質(zhì)熔結(jié)凝灰熔巖、流紋質(zhì)含角礫熔結(jié)凝灰熔巖、隱爆角礫巖、安山質(zhì)集塊熔巖與凝灰?guī)r)。沉積相為扇三角洲相,具體分為扇三角洲平原亞相、扇三角洲前緣亞相與前扇三角洲亞相,分流河道微相、扇間沼澤微相,水下分流河道微相、河口砂壩微相與靜水泥質(zhì)沉積微相�；鹕綆r相包括爆發(fā)相和噴溢相,具體分為空落亞相、熱碎屑流亞相、噴溢相中部亞相和上部亞相。沉積巖與火山巖交替出現(xiàn)于營(yíng)城組中,主要發(fā)育3期沉積巖與3期火山巖,自下而上形成3個(gè)完整的沉積-火山旋回,即沉積巖Ⅰ-火山巖Ⅰ、沉積巖Ⅱ-火山巖Ⅱ和沉積巖Ⅲ-火山巖Ⅲ。這一發(fā)現(xiàn)對(duì)于重新認(rèn)識(shí)營(yíng)城組時(shí)期構(gòu)造-火山-盆地充填規(guī)律,可能具有重要啟示。文中精細(xì)的描述資料為今后相關(guān)的深入研究提供了迄今最精準(zhǔn)的基本地質(zhì)素材。
[Abstract]:The core of Yingcheng formation was continuously obtained from Songke 2 well of Cretaceous Continental Scientific drilling in China, with a diameter of 214mm and a yield rate of 98.47mm. It is the largest diameter, the highest yield and the most intact Yingcheng formation core, so far, the core of Yingcheng formation is the largest in diameter, the highest in yield and the most complete in preservation. These valuable data provide an unprecedented opportunity for the study of Yingcheng formation. The Yingcheng formation period corresponds to Aptian-Albian. Through the detailed description of the core of Yingcheng formation in Songke 2 well, The volcanic-sedimentary sequence of Yingcheng formation and its formation process are revealed. The Yingcheng formation mainly consists of sedimentary rocks and volcanic rocks. There are 17 types of sedimentary rocks, including 9 types of sedimentary rocks (conglomerate, coarse sandstone, medium sandstone, fine sandstone, siltstone). Silty mudstone, mudstone, breccia tuffaceous sandstone, tuffaceous sandstone, volcanic rocks, 8 kinds of volcanic rocks (rhyolite, fluid-gravelly breccia mass rock, fluid-grain breccia mass lava, fluid-grain melting-tuff lava, fluid-gravelly breccia lava, Crypto-explosive breccia, Anshanian mass lava and tuff. The sedimentary facies are fan delta facies, including fan delta plain subfacies, fan delta front subfacies and front fan delta subfacies, distributary channel microfacies, and fan-delta microfacies. Subaqueous distributary channel microfacies, estuarine bar microfacies and hydrostatic muddy sedimentary microfacies. Volcanic facies include eruption facies and spillage facies, which can be divided into empty subfacies, thermal clastic flow subfacies, The sedimentary rocks and volcanic rocks alternately appeared in Yingcheng formation, mainly developed 3 sedimentary rocks and 3 volcanic rocks, and formed three complete sedimental-volcanic cycles from bottom to top, I. e., sedimentary rocks 鈪，

本文編號(hào)：1699883