| 天津市滨海新区全新世浅埋古河道分布及演化特征 |
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| 引用本文： | 樊航宇,张树栋,齐波,周长红,吴荣泽,牛文明.天津市滨海新区全新世浅埋古河道分布及演化特征[J].地质找矿论丛,2021,36(4):486-494. |
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| 作者姓名： | 樊航宇 张树栋 齐波 周长红 吴荣泽 牛文明 |
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| 作者单位： | 天津市地质调查研究院,天津300191 |
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| 基金项目： | 滨海新区地下水及地质环境调查评价子项目"滨海新区地下空间开发利用评价"（编号：津地任[2018]2号）资助。 |
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| 摘 要： | 文章基于天津滨海新区54个典型地质钻孔和860余个工程地质钻孔资料的分析,通过钻孔联合剖面和砂体厚度统计,研究了滨海新区全新世古河道分布和演化的特征。结果表明,在全新世时期发育3期古河道,陆相古河道为曲流河河道带,海相古河道为三角洲水下分支河道及分支河口砂坝。其中,全新世中期又分为3个亚期,与渤海湾西岸全新世时期海进和海退作用过程密切相关;埋深25 m内的浅埋古河道分为蓟运河、海河和古黄河三个系统,古河道的形成明显受海平面变化和气候变化的影响。
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| 关 键 词： | 滨海新区 全新世 浅埋古河道 分布特征 天津市 |
| 收稿时间： | 2021/8/27 0:00:00 |
Distribution and evolution of Holocene shallowly buried paleo channels in Binhai New Area, Tianjin |
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| FAN Hangyu,ZHANG Shudong,QI Bo,ZHOU Changhong,WU Rongze,NIU Wenming.Distribution and evolution of Holocene shallowly buried paleo channels in Binhai New Area, Tianjin[J].Contributions to Geology and Mineral Resources Research,2021,36(4):486-494. |
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| Authors: | FAN Hangyu ZHANG Shudong QI Bo ZHOU Changhong WU Rongze NIU Wenming |
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| Institution: | Tianjin Institute of Geological Survey, Tianjin 300191, China |
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| Abstract: | Data of 54 typical geological boreholes and more than 860 engineering geological boreholes are analyzed. Profile of the boreholes is integrated and statistics of sand bodies thickness of the boreholes made, distribution and evolution characteristics of Holocene paleo channels in Binhai New Area studied. In Holocene Epoch three periods were developed with meandering channel belt, distributary channel in underwater delta and mouth bar. Middle Holocene is in turn divided into three sub-period related closely to the Holocene transgression and regression on the west cost of Bohai bay. The shallowly buried paleo channels in the area occur within 25 m to depth in three systems i.e. Jiyunhe River, Haihe River and ancient Yellow River. Formation of the systems is obviously affected by change of sea level and climate. |
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| Keywords: | Bohai New Area Holocene shallowly buried paleo channel distribution characteristics Tianjin |
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