| 西藏改则盆地渐新统—中新统康托组沉积相特征 |
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| 引用本文： | 姜高磊,韩 芳,宋博文,韦 一,江尚松,罗 亮,张克信.西藏改则盆地渐新统—中新统康托组沉积相特征[J].地质通报,2013,32(1):165-174. |
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| 作者姓名： | 姜高磊 韩 芳 宋博文 韦 一 江尚松 罗 亮 张克信 |
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| 作者单位： | 1.中国地质大学生物地质与环境地质国家重点实验室，湖北 武汉 430074；
2.中国地质大学地球科学学院，湖北 武汉 430074 |
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| 基金项目： | 中国地质调查局国家青藏专项项目《青藏高原新近纪隆升过程与地质事件群研究》(编号:1212011121261);国家自然科学基金《重大地质突变期生物与环境协同演化》项目(批准号:40921062) |
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| 摘 要： | 改则盆地地处青藏高原羌塘地层区,研究程度较低。通过对西藏改则盆地新近系康托组沉积特征和沉积岩相的详细研究,共划分出3类沉积相:扇三角洲相、湖泊三角洲相和湖泊相,整体表现为自下向上沉积物粒度由粗到细、水深逐渐增大的退积序列。综合区域地质特征及古流向分析认为,改则盆地渐新世—中新世的沉积演化可大致分为2个阶段:盆地初始裂陷阶段和盆地稳定沉积阶段。康托组剖面沉积相的研究有助于了解改则盆地渐新世—中新世的沉积演化。
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| 关 键 词： | 康托组 改则盆地 渐新统—中新统 沉积相分析 |
Sedimentary facies analysis of the Oligocene-Miocene Kangtuo Formation in Gerze Basin, Tibet |
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| JIANG Gao-Lei,HAN Fang,SONG Bo-Wen,WEI Yi,JIANG Shang-Song,Luo Liang,ZHANG Ke-Xin.Sedimentary facies analysis of the Oligocene-Miocene Kangtuo Formation in Gerze Basin, Tibet[J].Geologcal Bulletin OF China,2013,32(1):165-174. |
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| Authors: | JIANG Gao-Lei HAN Fang SONG Bo-Wen WEI Yi JIANG Shang-Song Luo Liang ZHANG Ke-Xin |
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| Institution: | 1. Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, Hubei, China;
2. Faculty of Earth Science, China University of Geosciences, Wuhan 430074, Hubei, China |
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| Abstract: | The Gerze basin located in the Qiangtang stratigraphic area of the Tibetan Plateau has been very insufficiently studied. According to the sedimentary characteristics of the Oligocene-Neogene Kangtuo Formation, three sedimentary facies have been recognized in the Gerze basin. i.e., fan delta facies, lacustrine delta facies and lacustrine facies. In combination with regional geological characteristics and paleocurrent analysis, the Oligocene-Neogene sedimentary evolution in the study area is divided into two stages, which in the chronological order are the initial rift-sagging stage and the steady depositional stage. The facies analysis of the Kangtuo section has obviously shed light on the understanding of the Oligocene-Neogene sedimentary evolution in the study area. |
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| Keywords: | Kangtuo Formation Gerze basin Oligocene-Miocene sedimentary facies analysis |
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