【正文】 物的特征進行研究，一方面要研究天津師范大學不同地層的沉積物特征之外，另外還要研究這一地區(qū)不同地質歷史時期海岸線的變遷及其變化趨勢。本篇論文主要探討研究天津平原的沉積物特征，側重于古地質和古海陸分布方面的研究。在研究中通過測定該地區(qū)下伏沉積物粘土混濁水溶液電導率，可以精確的判斷沉積物的海陸相特征，復原其形成時的古地質環(huán)境，為以后渤海灣地區(qū)的海平面變化研究提供可供參考的研究方法和實驗數據。 1 1 引言 位于渤海灣西岸的 天津平原地勢低平 ， 是典型的淤泥質平原海岸。 Middleupper Holocene。 (3)考慮這一位置是否受到了古河道的影響而使陸相沉積層增厚 ，有待于進一步研究。 題目 ： 天津師范大學主校區(qū)中上全新統(tǒng)沉積物特征研究 2 天津師范大學主校區(qū)中上全新統(tǒng)沉積物特征研究 摘要 ： 通過對 渤海灣西 北岸天津師范大學主校區(qū)內深達 11m的 SD鉆孔和深度 為 的 SD1 剖面進行連續(xù)取樣，運用粘土混濁水電導率測定方法對其進行海陸相演替變化分析，經實驗證明 ： (1)天津師范大學主校區(qū)所在地區(qū)陸相沉積厚度至少在 11m 以上，天津師大或為全新世最大海侵的邊緣或由于地殼下降導致海相層處于地 下 11m 以下的位置 。 (2)沉積物 的 粘土混濁水電導率與 pH 值 曲線 呈現出 反相關的變化趨勢， 即電導率值越大， pH 值越小。 關鍵詞： 天津平原；中上全新統(tǒng)； 粘土 混濁水 電 導率 Tianjin Normal University the Middleupper Holocene Sediments’ Features Research Abstract: This paper based on many samples made continuous in the main campus of Tianjin Normal University, which located in the northwestern shore of Bohai Bay. These samples were collected from 11 meters deep borehole marked SD and meters deep SD1 profile. We engrain method of determine claywater electric conductivity measuring to analysis its sea continental succession changing and get a conclusion that proved by the experiment said :(1) Tianjin Normal University main campus of the area where the continental sediments thickness at least in more than 11meters,Tianjin Normal University is perhaps the Holocene transgression maximum edge. Another possible, caused marine layer at 11 meters below ground location due to crust down.(2)Two characteristics of sediment: clay water electric conductivity and pH value of the curve showing antirelated trends, in short, the conductivity is greater, pH value is smaller. (3)Considering this location maybe the fallout of the ancient continental river sediment or lead to layer of continental deposits more thick, we needs further study. Key words: Tianjin plain。 clay water electric conductivity 目 錄 1 引言 ...................................................................................................................................... 1 2 研究區(qū)域的自然地理概況 .................................................................................................. 4 地理位置 ....................................................................................................................... 4 地質條件和地貌條件 ................................................................................................... 5 氣候條件 ....................................................................................................................... 5 海岸線條件 ................................................................................................................... 5 水文條件 ....................................................................................................................... 6 3 粘土混濁水電導率實驗 ...................................................................................................... 6 樣品采集 ....................................................................................................................... 6 樣品采集地點 ......................................................................................................... 6 采集過程 ................................................................................................................. 7 注意事項 ................................................................................................................. 7 實驗使用儀器 ............................................................................................................... 7 實驗原理 ....................................................................................................................... 8 實驗過程 ....................................................................................................................... 9 4 SD 孔和 SD1 剖面實驗結 果 ............................................................................................. 9 SD 孔巖性描述 ............................................................................................................. 9 SD 孔粘土混濁水電導率與 PH 值測定結果 ............................................................. 10 SD1 剖面巖性描述 .................................................................................................... 13 SD1 剖面粘土混濁水電導率與 PH 值測定結果 ..................................................... 13 5 討論 ...........................................................................................................................