| 新疆博格达地区中二叠世—早三叠世构造-气候-沉积演化及耦合机制* |
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| 引用本文： | 史燕青,王剑,张国一,刘明,向鹏飞,杨志波,季汉成.新疆博格达地区中二叠世—早三叠世构造-气候-沉积演化及耦合机制*[J].古地理学报,2021,23(2):389-404. |
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| 作者姓名： | 史燕青 王剑 张国一 刘明 向鹏飞 杨志波 季汉成 |
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| 作者单位： | 1.中国石油大学(北京)地球科学学院,北京 102249;2.中国石油大学(北京)油气资源与探测国家重点实验室,北京 102249;3.中国石油新疆油田公司实验检测研究院,新疆克拉玛依 834000;4.中国石油吉林油田勘探开发研究院,吉林松原 138000 |
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| 基金项目： | *中国石油天然气集团有限公司-中国石油大学(北京)战略合作科技专项(编号: ZLZX2020-01)资助 |
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| 摘 要： | 博格达地区的盆山关系演化、博格达山初始隆升时间、构造-气候-沉积耦合机制等前沿科学问题一直是国内外研究的热点,也一直困扰和制约准噶尔盆地东南缘的油气勘探开发进程。基于博格达山北缘野外露头和阜康凹陷、吉木萨尔凹陷的岩心、地震及钻测井资料,综合运用沉积学、地球化学等多种方法,阐明了博格达地区中二叠统—下三叠统展布及沉积相特征,恢复了相应的古气候变化,结合区域研究成果重建了中二叠世至早三叠世构造-气候-沉积演化过程。认为博格达地区中二叠世为裂谷—坳陷盆地构造背景,在干旱—半干旱气候条件下,发育以博格达地区为湖泊中心的辫状河三角洲—湖泊沉积体系;晚二叠世博格达山发生初始隆升,早期湖盆消亡并在博格达北坡山前发育冲积扇,古气候由半干旱变化为半湿润;早三叠世博格达地区构造环境相对稳定,但是逐渐趋于温暖湿润的古气候对区域风化程度和沉积条件起主要控制作用,博格达山体遭受强烈风化剥蚀,北侧形成扇三角洲—湖泊沉积体系。
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| 关 键 词： | 准噶尔盆地 博格达 中二叠世— 早三叠世 构造活动 沉积相 古气候 |
| 收稿时间： | 2020-10-13 |
Tectono-climatic-sedimentary evolution and coupling mechanism during the middle Permian-early Triassic in Bogda area,Xinjiang |
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| Shi Yan-Qing,Wang Jian,Zhang Guo-Yi,Liu Ming,Xiang Peng-Fei,Yang Zhi-Bo,Ji Han-Cheng.Tectono-climatic-sedimentary evolution and coupling mechanism during the middle Permian-early Triassic in Bogda area,Xinjiang[J].Journal of Palaeogeography,2021,23(2):389-404. |
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| Authors: | Shi Yan-Qing Wang Jian Zhang Guo-Yi Liu Ming Xiang Peng-Fei Yang Zhi-Bo Ji Han-Cheng |
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| Institution: | 1.College of Geosciences,China University of Petroleum(Beijing),Beijing 102249,China;2.State Key Laboratory of Petroleum Resources and Prospecting,China University of Petroleum(Beijing),Beijing 102249,China;3.Research Institute of Experiment and Detection,PetroChina Xinjiang Oilfield Company,Xinjiang Karamay 834000,China;4.Exploration & Development Research Institute, PetroChina Jilin Oilfield Company, Jilin Sonyuan 138000, China |
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| Abstract: | The evolution of the basin-mountain relationship,the initial uplift time of Bogda Mountain,and the tectonic-climate-sedimentary coupling mechanism have been the research issues,and have been restricting the process of oil and gas exploration and development in the southeastern margin of the Junggar Basin. This work uses the outcrops in north rim of the Bogda Mountain,cores,seismic,drilling and logging data of the Fukang and Jimusar sag to illuminate the middle Permian-lower Triassic stratigraphic distribution,characteristics of sedimentary facies,and climate change in the Bogda region. Based on above research,a tectono-climate-sedimentary evolution of the middle Permian to early Triassic can be rebuilt. In the middle Permian,the Bogda area was characterized by a rift-depression tectonic setting,an arid and semi-arid climate,and a braided river delta-lacustrine sedimentary system in the basin center. In the late Permian,the Bogda Mountain was uplifted initially,the early lake basin died out and replaced by alluvial fans in front of the north slope of the Bogda Mountain. The paleoclimate changed from semi-arid to semi-humid. In the early Triassic,the tectonic background of the Bogda region was relatively stable,but the paleoclimate gradually became warm and humid,which played a major role in affecting the regional weathering degree and sedimentary process. The Bogda Mountain underwent intense weathering and denudation,and the fan delta-lake sedimentary system was formed on its north side in this period. |
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| Keywords: | Junggar Basin Bogda middle Permian-early Triassic tectonic activity sedimentary facies paleoclimate |
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