摘要
中欧盆地三叠系是典型的海陆过渡相沉积 ,松辽盆地白垩系是含有海侵事件记录的陆相河湖盆地。两盆地的共同特点是 :1大陆克拉通上长期发育的大型坳陷盆地 ;2靠近古大洋和 (或 )有向海通道 ;3主要由互层状泥岩、粉砂岩、碳酸盐岩和膏盐层组成 ;4无典型海相化石 ,可能发育有半咸水和 (或 )高盐度生物 ;5海侵层中自生矿物的 δ34 S,δ1 3C,δ1 8O同位素比值及介质盐度指数 (Sr/Ba)、碱度指数 (Ca+Mg) /(Si+Al)、还原性指标 (Zn+Ni) /Ga、硫沉积通量指数 (归一化硫含量 )等显著高于相邻层位背景值。
The Triassic of the Central European basin represents a typical marine influenced terrigenous sequence. The Cretaceous succession of the Songliao basin is made up of marine related fluvial lacustrine deposits. Both basins share the following characteristics: 1) They are large scale cratonic sag basin successions. 2) The basins were connected with paleooceans. 3) The lithology of the basins consists of interlayed mudstone, siltstone, carbonates and gypsum/halite. 4) Typical marine fossils are rare,instead, brackish and/or high salinity fossils are abundant. 5) The ‰δ 34 S, ‰δ 18 O, ‰δ 13 C values of autogenetic minerals in the transgressive beds, Sr/Ba, (Ca+Mg)/(Si+Al), (Zn+Ni)/Ga values and index of sulfur deposit flux are distinctly higher than those in the adjcent layers.
出处
《矿物岩石》
CAS
CSCD
北大核心
2002年第2期47-53,共7页
Mineralogy and Petrology
基金
国家自然科学基金 (NSF C)资助项目 49672 12 4号
attained with the assistance of the Av H(Germany)
