Stable isotope composition of carbonate components of Rhaetian shallow-water limestones of the Wombat Plateau@en

Stable oxygen- and carbon-isotope ratios of Rhaetian (upper Triassic) limestone samples from the Wombat Plateau, northwest Australia, were measured to explore possible diagenetic pathways that the material underwent after deposition in a shallow-water environment, before plateau submergence in the Early Cretaceous. Host sediment isotopic values cluster near typical marine carbonate values (d18O ranging from -2.57 per mil to +1.78 per mil and d13C, from +2.45 per mil to +4.01 per mil). Isotopic values of equant clear calcite lining or filling rock pores also plot in the […]对澳大利亚西北部袋熊高原（Wombat Plateau）产出的瑞替阶（Rhaetian，晚三叠世）石灰岩样品的稳定氧、碳同位素比值进行了测定，以探究该样品在浅水环境沉积后、早白垩世高原被淹没前所经历的成岩路径。寄主沉积物的同位素值集中分布于典型海相碳酸盐岩同位素值区间（δ¹⁸O范围为-2.57‰至+1.78‰，δ¹³C范围为+2.45‰至+4.01‰）。充填或衬砌于岩石孔隙中的等轴状纯净方解石的同位素值同样分布于[…]