现代黄河三角洲沉积物沉积年代的确定
Determination of depositional age in the Huanghe Delta in China
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摘要: 黄河三角洲前缘粉砂分布于河口外中部,三角洲侧缘或分流间湾黏土质粉砂分布于三角洲前缘粉砂体的两侧。分流改道时新的分流河口大多分布在老叶瓣三角洲侧缘或分流间湾位置。这样,年轻的三角洲前缘粉砂覆盖在老三角洲侧缘或分流间湾黏土质粉砂之上,与此同时,年轻的三角洲侧缘或分流间湾黏土质粉砂覆盖在老三角洲前缘粉砂之上,形成规律性的叠覆层序。在观察钻孔岩心时,正确判断某一层的沉积环境,追踪其物质来历,即判断是从哪一条分流河道搬运来的物质形成的,该分流河道的活动年代就是该层形成的年代。Abstract: The comprehensive analysis of historical geography and sedimentary geology can be applied for dating the sedimentary layers of this very young delta.The form of the subaqueous delta lobe is like a lens and the delt a front silt is located at the middle off the river mouth and the delta lateral(interdistributary bay)clayey silt is distributed beside the delta front.Commonly the younger distributary channel mouth is located between two abandoned river mouths.The younger delta front silt overlays the older delt a lateral (interdistributary bay)clayey silt and the younger delt a lateral(interdistributary bay)clayey silt overlays the older delta front silt simultaneously.The historical record of the location and dates of each distributary channel have been made.After determining sedimentary environments of the layers in core and sediment sources,the dates of the layers are got because the dates of the distributary channels are also the dates of the layers.
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范德江,杨作升,郭志刚.中国陆架210Pb测年应用现状与思考[J].地球科学进展,2000,15(3):297-302. 成国栋,薛春汀.黄河三角洲沉积地质学[M].北京:地质出版社,1997:147. 庞家珍,司书亨.黄河河口演变:L 近代历史变迁[J].海洋与湖沼,1979.10(2):136-141. PRIOR D B,YANG Z S,BORNHOLD B D,et al.The subaqueous delta of the Modem Huanghe(Yellow River)[J].Geo-Marine Let-tera,1986,6(2):67-75. COLMAN J M,PRIOR D B.Delta Sand Bodies[M].Amer Assoc Petrol Geol Continuing Education Course Note Series No.15.1982:171. WRIGHT L D.River deltas[G]//DAVIS R A Jr.Coastal Sedimentary Environments.New York:springer-Verlag,1985:1-76. 薛春汀,李广雪.黄河三角洲沉积环境和沉积物[G]//成国栋.黄河三角洲现代沉积作用及模式.北京:地质出版社,1991:38-60. 黄世光,王志豪.黄河1964—1976年刁口流路泥沙冲淤及其分布特点[J].海洋地质与第四纪地质,1991,11(1):15-28. 李广雪,薛春汀.黄河水下三角洲沉积厚度,沉积速率及砂体形态[J].海洋地质与第四纪地质,1993,13(4):35-44. WRIGHT I D.WISEMAN W J Jr,BORNHOLD B D,et al.Marine dispersal and deposition of Yellow River silts by gravity-driven un-der f1ow[J].Nature,1988,332:629-632. 侍茂崇,赵进平.黄河三角洲半El潮无潮区位置及水文特征分析[J].山东海洋学院学报,1985,15(1):127-136. 李广雪,成国栋,魏合龙,等.现代黄河口区流场切变带[J].科学通报,1994,39(10):928-932. 任于灿,丁东,董万.黄河三角洲的进积和蚀退[G]//成国栋.黄河三角洲现代沉积作用及模式.北京:地质出版社,1991:61-76. 王志豪,黄世光.利用近年实测海图及古海图研究黄河三角洲变迁[J].海岸工程,1988,7(2):47-58. XUE Chun-ting.Historical change in the Yellow River delta,China[J].Marine Geology,1993,113:321-330. XUE Chun-ting,ZHU Xion-hua,LIN He-mao.Holocene sedimentary sequence,foraminifera and ostraeoda in west coastal lowland of Bohai Sea,China[J].Quaternary Science Review,1995,14:521-530. 薛春汀,李绍全,周永青.西汉末一北宋黄河三角洲(公元11-1099年)的沉积记录[J].沉积学报,2008,26(5):804-812.
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