地质学报2011，Vol.85Issue(7)：1239-1250,12.DOI:11-1951/P.20110715.0858.011
渤海湾西岸几种地球化学的环境指标
Several Geochemical Indicators of the West Coast of Bohai Sea
摘要
Abstract
Several geochemical indexes were exaimized to find out the paleoenviroment evolution of the Holocene stratotype section on the west coast of Bohai Sea. These indexes, which are subgrouped to refer to various enviorments, such as paleoenviorment change, oxidation-reduction setting, and transformation environment of marine and terrestrial fades, were analyzed to obtain correlation coefficient and figure features using R-type convergent analysis, cluster analysis, and scatter plot The analytical results are: ① Paleoclimate index (Fig. 2) showing that paleotemperature values are in positive proportion to Rb/Sr ratios, with a correlation coefficient of + 0. 927, while CaCQ) contents are in distinct negative proportion to both paleotemperature values and Rb/Sr ratios, with a correlation coefficient of -0. 721, which indicates that paleotemperature negatively increased as content of CaCOs became high during chilly period. ② The oxidation-reduction indexes (Fig. 4) showing that Fe2+/Fe3+ ratios and Corg/P2O5 ratios have great convergent. ③ The indexes of transformation environment of marine and terrestrial facies (Fig. 5) showing that Sr/Ba ratios are in positive proportion to B/Ga ratio, with a correlation coefficient of +0. 946. While ratios of Sr/Ba and B/Ga are in positive proportion to Ca/(Ca+Fe) ratios, with a coefficient of +0. 894. Meanwhile, paleosalinity Sp and Rb/K ratios are in negative proportion to ratios of Sr/Ba, B/Ga, and Ca/(Ca+Fe), with correlation coefficients of -0. 729 and -0. 632. ④ Using optimal segmentation method and statistic analysis, this study classify three stages; cold climate stages from I to V, oxidation-reduction zoneS from Ⅰ to Ⅵ, and fluctuating graph of sea level ( from Ⅰ to Ⅶ), as shown in Fig. 3, which illustrates a reduction enviorment during cold enviorment, accompanied by sea level decreasing fluctuantly.关键词
几种地球化学指标/渤海湾西岸/全新世古环境Key words
several geochemical indicators/ western coast of Bohai Sea/ Holocene paleoenvironment引用本文复制引用
岳军,Dongyue,张宝华,牟林,王国明,陈安蜀,袁宝印,刘景兰,魏俊浩..渤海湾西岸几种地球化学的环境指标[J].地质学报,2011,85(7):1239-1250,12.基金项目
本文为国家自然基金项目(编号40940025)、天津市自然基金项目(编号07ZCGYSF02400和09JCYBJC07400)、国家973项目(编号2007CB411807)、国家海洋局海洋大气-化学与全球变化重点实验室开放基金项目(编号GCMAC0806)和国家自然科学基金项目(编号41006002)资助的成果. （编号40940025）
