秦皇岛柳江盆地本溪组—下花园组层序地层研究

发布时间：2019-06-26 17:59

【摘要】：本文以柳江盆地为主要研究对象。在较全面收集华北地区、柳江盆地本溪组-下花园组地层的已有研究成果和各种地质资料的基础之上,进行实地勘察测量、绘制剖面图、磨制薄片、室内镜下分析和实验等。并且通过数字模拟软件对研究区上本溪组-下花园组进行地质发展的演化进行模拟。取得了以下主要成果:实地测量剖面2条,约3.5km。通过现场勘查,采样制薄片,镜下分析等可知,上古生界沉积主要以陆源碎屑岩为主,其中,本溪组含页岩,夹灰岩透镜体,主要沉积环境为潮坪-o_湖沉积;太原组为页岩、砂岩及灰岩透镜体,主要为潮平-o_湖-局限碳酸盐台地沉积;山西组由灰色页岩、砂岩夹煤线组成,主要为三角洲沉积。中生界沉积主要以砂岩、砾岩为主,上三叠统杏石口组主要为砂岩、粉砂岩与泥岩互层,主要为砂质辫状河沉积。下侏罗统下花园组为砂岩夹砾岩夹煤线,含湖相沉积、砂质辫状河沉积;根据沉积相分析,采集古生物化石等对研究区史时期的古环境、古气候进行还原,其中石炭纪时期主要为温暖潮湿的气候,且经历过三次海泛;二叠纪时期为海滨沼泽环境,气候温暖潮湿;三叠纪期间地壳抬升,早、中三叠世气候炎热干旱。中三叠世晚期,炎热干燥的气候有所缓和;早侏罗世至中侏罗世早期,潮湿的气候得到进一步发展,中侏罗世晚期,本地区逐渐演变为半湿润-半干旱-干旱气候。最后,通过分析、结合前人资料,对柳江盆地上古生界-中生界的地质演化进行模拟,并通过maya、AE等软件实现恢复地质历史时期的陈基发展、构造运动。
[Abstract]:In this paper, Liujiang Basin as the main research object. On the basis of collecting the existing research results and various geological data of Benxi formation and Xiayuan formation in North China and Liujiang Basin, the field investigation and survey, the drawing of profile, the grinding of thin slices, the analysis and experiment under room endoscopy are carried out, and the results of field investigation and survey are carried out on the basis of the existing research results and various geological data of Benxi formation and Xiayuan formation in Liujiang Basin. The evolution of geological development of Shangbenxi formation and Xiayuan formation in the study area is simulated by digital simulation software. The main results are as follows: 2 profiles are measured in the field, about 3.5 km. Through field investigation, sampling thin slice and microscopic analysis, it can be seen that the Upper Paleozoic deposits are mainly terrestrial clastic rocks, in which Benxi formation contains shale and limestone lens, and the main sedimentary environment is Chaoping-o _ lake deposit, Taiyuan formation is shale, sandstone and limestone lens, mainly Chaoping-o _ lake-confined carbonate platform deposition. Shanxi formation is composed of grey shale and sandstone coal line, which is mainly deltaic deposit. The Mesozoic deposits are mainly sandstone and gravel, and the upper Triassic Xingshikou formation is mainly sandstone, siltstone and mudstone interbedded, mainly sandy braided river deposits. The Lower Jurassic Xiayuan formation is composed of sandstone with gravel coal line, lacustrine deposit and sandy braided river deposition. According to the analysis of sedimentary facies, the paleontological fossils were collected to restore the paleoclimate and paleoclimate in the historical period of the study area, in which the Permian period was mainly warm and humid climate, and experienced three times of sea flooding, and the Permian period was coastal swampy environment with warm and humid climate. During the Triassic period, the crust rose, early, and the climate of the Middle Triassic was hot and dry. In the late Middle Triassic, the hot and dry climate was moderate, and from the early Jurassic to the early Middle Jurassic, the humid climate was further developed, and in the late Middle Jurassic, the area gradually evolved into a semi-humid, semi-arid and arid climate. Finally, through the analysis and combined with the previous data, the geological evolution of the Upper Paleo-Mesogenetic realm in Liujiang Basin is simulated, and the Chen Ji development and tectonic movement in the geological history period are restored by maya,AE and other software.
【学位授予单位】：中国矿业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P539.2

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