淄博地区上新世巴漏河组的发现及意义

上新世巴漏河组在淄博地区的发现填补了该地区上新统的空白。阐述了巴漏河组的空间展布特征及其对新构造运动的指示意义 ;综合运用沉积岩相分析、孢粉分析、岩石化学分析等方法对巴漏河组剖面进行了系统研究 ,分析了其成因及形成时代 ,重建了淄博地区上新世晚期的沉积、生态及气候等古地理环境。认为巴漏河组是在上新世晚期由河流搬运堆积形成 ,在其沉积过程中 ,淄博地区的植被由针阔混交林演替为以松为主的针叶林 ,气候由暖湿的暖温带气候向冷湿气候变迁 ,并呈现出进一步干冷化的趋势

DISCOVERING BALOUHE FORMATION OF PLIOCENE AND ITS SIGNIFICANCE IN ZIBO AREA,SHANDONG PROVINCE

The development of the Balouhe Formation discovered at first time in Zibo area,Shandong Province filled the stratum gap of Pliocene system.The distributive character of the Balouhe Formation indicates the feature of neotectonic movement.The neotectonic movement was not equilibrium in Zibo area, the rising speed was faster and its extent was larger in mountain than in hilly land or plain.Palaoenvironment of Pliocene consisting of sedimentary environment,vegetation and palaeoclimate is reconstructed in Zibo area by employing a comprehensive method combining sedimentary analysis and the synthetic study on the combination of pollen and the character of chemical stratigraphy.During Late Pliocene,the climate of the area fluctuated from warm and moist to cold and damp.Moreover,it trended to draught and cold.And the vegetation evolved from conifer broadleaf mixed forests to coniferous forests.