本文關鍵詞： 本溪組 鏡質體反射率 埋藏史 有機質演化　出處：《沈陽師范大學》2015年碩士論文　論文類型：學位論文

【摘要】：石炭紀地層在我國華北地區(qū)分布廣泛,在遼東地區(qū),石炭紀地層十分發(fā)育。其中,本溪組是一套海陸交互相的地層,也是這一地區(qū)具有代表性的地層。本溪組地層在本溪地區(qū)出露地點分別是位于本溪市西北的牛毛嶺、偏嶺鄉(xiāng)窯子峪、田師付鎮(zhèn)孔家堡子地區(qū),其中,牛毛嶺剖面是本溪組的命名剖面。近百年來,很多地質古生物學家對本溪組的古生物和地層都進行了較為詳細的探究。在此基礎上,本論文著重研究本溪地區(qū)本溪組的沉降史及沉積有機質演化。本文研究了牛毛嶺本溪組標準剖面、窯子峪本溪組剖面和田師付孔家堡子本溪組剖面的巖性及沉積層序,對窯子峪本溪組剖面進行了實際測量并進行了巖性分析。在三條剖面共采集Ro標本9個,并選擇其中的4個樣品進行了鏡質體反射率的檢測,其結果表明這一地區(qū)本溪組的有機質演化程度可達長焰煤—貧煤階段。通過繪制相關的沉降史曲線圖,分析本溪組煤系地層的埋藏史,認為這一地區(qū)的沉降史大致分為前期、中期和后期三個階段,分別為緩慢沉降期、快速沉降期和抬升期。這一地區(qū)本溪組的古地理環(huán)境總體表現(xiàn)為河流到濱岸沼澤再到海陸交互相沉積的過程。
[Abstract]:Carboniferous strata are widely distributed in North China, and Carboniferous strata are well developed in the eastern part of Liaoning Province. Benxi formation in Benxi area is located in Niumoling, Yaoziyu, Yaoziyu, Tianshifu town, which is located in the northwest of Benxi city. Niumaoling section is a named section of Benxi formation. In the last hundred years, many geobiologists have studied the paleontology and strata of Benxi formation in detail. In this paper, the sedimentation history and the evolution of sedimentary organic matter of Benxi formation in Benxi area are studied, and the standard section of Niumaoling Benxi formation is studied in this paper. The lithology and sedimentary sequence of the section of the Yanziyu Benxi formation and the section of Fukongjiapuzi Benxi formation are measured and analyzed. Nine samples of Ro are collected in three sections. Four of the samples were selected for vitrinite reflectance detection. The results show that the evolution degree of organic matter in Benxi formation in this area can reach the stage of long flame coal and lean coal. By analyzing the burial history of coal measure strata in Benxi formation, it is considered that the subsidence history in this area can be divided into three stages, namely, the early stage, the middle stage and the later stage, respectively, which are the slow subsidence periods. The paleogeographic environment of Benxi formation in this area is the process of river to shore swamp and then to sea and land intersecting each other.
【學位授予單位】：沈陽師范大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：P618.11

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