李小艳, 赵泉鸿, 姚政权, 王强, 翦知盡, 石学法. 渤海百万年以来的海侵记录:BH08孔有孔虫和介形类证据[J]. 海洋地质与第四纪地质, 2015, 35(6): 93-108. DOI: 10.16562/j.cnki.0256-1492.2015.06.010
引用本文: 李小艳, 赵泉鸿, 姚政权, 王强, 翦知盡, 石学法. 渤海百万年以来的海侵记录:BH08孔有孔虫和介形类证据[J]. 海洋地质与第四纪地质, 2015, 35(6): 93-108. DOI: 10.16562/j.cnki.0256-1492.2015.06.010
LI Xiaoyan, ZHAO Quanhong, YAO Zhengquan, WANG Qiang, JIAN Zhimin, SHI Xuefa. TRANSGRESSIVE RECORDS OF LAST MILLION YEARS IN THE BOHAI SEA,CHINA: EVIDENCE FROM FORAMINIFERA AND OSTRACODA OF CORE BH08[J]. Marine Geology & Quaternary Geology, 2015, 35(6): 93-108. DOI: 10.16562/j.cnki.0256-1492.2015.06.010
Citation: LI Xiaoyan, ZHAO Quanhong, YAO Zhengquan, WANG Qiang, JIAN Zhimin, SHI Xuefa. TRANSGRESSIVE RECORDS OF LAST MILLION YEARS IN THE BOHAI SEA,CHINA: EVIDENCE FROM FORAMINIFERA AND OSTRACODA OF CORE BH08[J]. Marine Geology & Quaternary Geology, 2015, 35(6): 93-108. DOI: 10.16562/j.cnki.0256-1492.2015.06.010

渤海百万年以来的海侵记录:BH08孔有孔虫和介形类证据

TRANSGRESSIVE RECORDS OF LAST MILLION YEARS IN THE BOHAI SEA,CHINA: EVIDENCE FROM FORAMINIFERA AND OSTRACODA OF CORE BH08

  • 摘要: 对渤海南部BH08孔275个沉积物样品进行了有孔虫和介形类定量分析,依据化石群落特征及其指示的沉积环境,在孔深180m以上地层中识别出16个海相层,从上到下依次命名为第1海相层(M1)至第16海相层(M16)。应用Yao等(2014)所建立的BH08孔冰期/间冰期地层层序和年龄框架,初步树立起1Ma以来能与全球深海氧同位素分期(MIS)相对应的海相层序,其中M1和M2为末次冰期后沉积,M3发生在MIS 3期,M4、M5和M6分别对应于MIS 5.1、MIS 5.3和MIS 5.5,M7至M16分别与MIS 7至MIS 25相对应。依据化石群落特征所反映的沉积环境,16个海相层的海相性程度由强到弱依次为:远岸内陆架(M9)、受径流少许影响的内陆架中部浅海或滨岸浅海(M1和M2)、受径流明显影响的近河口滨岸浅海或前三角洲(M6、M7、M8、M10和M13上部)、河流强烈作用下的三角洲前缘、河口边滩或有河流注入的半封闭半咸水泻湖(M3、M4、M5、M11、M12和M14-M16)和潮上带低盐度浅湖、沼泽(M3顶部、M4中一些薄层和M16底部)。

     

    Abstract: Based on the quantitative foraminiferal and ostracod study of 271 samples taken from the Core BH08 (38.28°N,119.99°E,water depth 25 m,core length 212.4 m),a total of 16marine beds,labeled M1 to M16 from top to bottom,has been recognized.The chronological study demonstrates that the 16 marine beds were deposited during the interglacials of the last million years.The paleoenvironmental data inferred from foraminiferal and ostracod communities may be grouped into 5biofacies with marine influence from strong to week:offshore inner shelve (M9),nearshore inner shelve with weak river influence(M1 and M2),pro-delta or nearshore inner shelve with moderate river influence (M6,M7,M8,M10,and upper M13),delta front,tidal flat of river mouth or semi-closed brackish lagoon under the river control (M3,M4,M5,M11,M12 and M14 to M16),and supra-littoral marsh or shallow lake of low salinity (top M3,some interlayers of M4 and bottom M16).

     

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