【摘要】 对济源盆地承留三皇村的三叠系与侏罗系界线剖面地层沉积环境进行了研究 ,运用聚类分析等方法对各沉积环境中的元素共生组合关系及分布特征进行了分析。结果表明 ,在该剖面晚三叠世末期的谭庄组上部至早侏罗世的鞍腰组底部可划分出半深湖亚相、滨浅湖亚相、前三角洲亚相及冲积平原的河漫滩和泛滥盆地亚相等类型。在不同的沉积环境中 ,元素的组合关系、分布特征不同。除了元素本身具有不同的化学特征外 ,沉积环境的水体深度、与物源区的距离、沉积物的粒度大小、水体介质的化学性质 (盐度、pH值、Eh值 )等因素也决定着元素在沉积岩中的分布特征。更多还原

【Abstract】 The sedimentary environment of the Triassic Jurassic boundary section in Sanhuang County of Jiyuan basin was investigated. Six sedimentary facies (or sub facies) were determined, including lacustrine plain, delta front, prodelta, lake shore, or shallow lake, sub deep lake. The association and distribution characters of the elements in this section were analyzed. The results indicate that the sedimentary environment is the main factor for controlling the geochemical elements’ association and distribution in the sedimentary rock.更多还原