Besides, the sedimentary facies of upper ganchaigou and lower ganchaigou formation were also mapped in supersequences which are the main target strata for exploration. the high resolution sequence stratigraphic framework showed the genetic relationship between the distributions of sedimentary facies and their tectonic settings. the near - source sedimentary systems such as subaqueous alluvial fan and lake - floor fan are often deposed in rise - hemicycles in the steep slope background in the north, the coarse lithology of fan - delta prograded from north to south in fall - hemicycles, and the braided stream facies are formed in the rise - hemicycles in gentle slope background in the south, braided stream facies prograded from sorth to north in the fall - hemicycles, but the lacustrine facies and salt lake facies developed in the middle part of the area
詳細的沉積相研究發現,紅獅地區第三系發育有沖積扇、水下沖積扇、河流、三角洲、扇三角洲、湖泊和湖底扇7種主要沉積相類型,並對作為區內主要勘探目的層系的下乾柴溝組和上乾柴溝組進行了以超層序為單位的沉積相平面編圖,以較高的時間解析度揭示了區內沉積相帶的平面展布及其在不同構造背景中的分佈規律,比如在北部的凹陷陡坡背景下,上升半
旋迴低水位期通常發育有水下扇、湖底扇等陡岸近源特徵的沉積體系,下降半
旋迴高水位期,扇三角洲相粗碎屑巖由北向南進積;在南部的凹陷緩坡背景下,上升半
旋迴主要發育辮狀河流相,下降半
旋迴辮狀河三角洲相由南向北進積;而中部紅柳泉一獅子溝一帶則為湖泊相沉積和鹽類沉積。
Both the annual banding growth rate curve and grey level curve show the evolution processes of the precipitation over the past 2000 years this region and that divide into seven dry / wet cycles
石筍紋層厚度和灰度曲線比較清晰地揭示了本區過去2000年降水演化過程,可劃分7個干濕
旋迴。
In the studying zone, one long term cycle, 6 middle term cycles and 27 short term cycles was identified and correlated. base on the correlation
在非均質模式與油氣動用狀況分析基礎上,研究了基準面
旋迴對油氣動用狀況和剩餘油分佈的控製作用。
There are 5 depositional systems in the region. they are panne and jishan delta systems coming from chengning heave near the northwest border of the region, shuangfeng delta located in southwest part of the region coming from luxi dome, qudi fan - delta located in the southeast of the studying area and the sub - fan near fault or fan - delta of the southern part of the region. based on the study of sedimentary facies and depositional systems, 11 lithological traps are predicted
在等時地層格架內對沙三段各中期基準面
旋迴內的沉積相和沉積體系進行了詳細研究,確定了沙三段沉積時期發育的五種沉積體系類型,即來自凹陷西北邊界埕寧凸起的盤河三角洲體系和基山三角洲體系、來自魯西隆起、分佈在凹陷西南部的雙豐三角洲體系、東南部的曲堤(扇)三角洲體系,南部的近岸水下扇/扇三角洲體系。
The carbonate content varied from 0 to 34. 55 % in the column of drilling core ey02 - 2, the higher carbonate content related to materials of modern and old yellow river in postglacial period, while the peak carbonate content related to the shell fragment in the sediment, the dissolved cycle appeared to be the carbonate dissolved cycle of the atlantic mode
Ey02 - 2孔柱樣碳酸鹽含量在0 - 34 . 55之間變化,呈現大西洋型caco _ 3溶解
旋迴,冰後期以來碳酸鹽高含量與高碳酸鹽的現代黃河和廢黃河物質有關,而中晚更新世碳酸鹽極高含量與貝殼含量有關。
Uranium has been redistributed by biological processes as well as in the sedimentary cycle.
由於生物作用,以及沉積
旋迴,鈾發生重新分佈。
( 2 ) providing the new information on large - scale, superlarge - scale deposits evolution in time and characteristic metallogenic events of the main stages during geodynanmic evolution ; summarizing the feature of large - scale metallogenic processes in some giant deposit clusters in the world and concluding the main type of large - scale metallogenic processes in the tectonic cycle of lithosphere
2 )較詳細地提供了全球主要金屬礦種大型、巨型礦床隨時間演化的新資料,闡述了地球動力學演化歷史中主要成礦階段的特徵成礦事件,首次總結了世界一些主要巨型礦集區的大規模成礦作用及其地球動力學背景特徵,並歸納了巖石圈構造演化
旋迴中的大規模成礦作用類型。
The whole jurassic period santanghu basin was undergone a sedimental cycle : river - lake - river, the environment changed from warm - wet to drought
三塘湖盆地整個侏羅紀經歷了一個由河流?湖泊?河流的沉積
旋迴,環境由溫暖潮濕逐漸向半乾旱?乾旱的環境轉變。
Situated at the southeast of the mu us desert, ordos plateau, the milanggouwan stratigraphical section in the salawusu river valley keeps a record of 38 sedimentary cycles of alternate evolution of the aeolian dune layers with the fluvio - lacustrine facies and palaeosols since 150 ka bp
位於鄂爾多斯高原毛烏素沙漠東南邊緣的薩拉烏蘇河流域的米浪溝灣剖面,記錄了150kabp以來的38個風成的砂丘砂與河湖相和古土壤交替演化的沉積旋迴。