Abstract Climate changes close to the Lochkovian-Pragian Event are still widely discussed. Carbonate δ18O and δ13C and conodont apatite δ18O from medial to distal carbonate ramp sediments were analysed to provide further stable isotope data from the stratotype area in the Prague Basin. The uppermost Silurian to lower Emsian δ18O trends are put into an updated conodont biostratigraphy framework. Carbonate δ18O and δ13C are discussed in the context of facies-dependent diagenesis. The δ13C pattern measured from different sections enables the correlation of intervals with development of different facies inside the Prague Basin. Positive δ13C shifts are often coupled with trends of decreasing computed gamma-ray (CGR) values interpreted as regressions, whereas negative δ13C shifts commonly coincide with opposite trends in CGR. The Lochkovian-Pragian boundary interval coincided with an increase in carbonate δ13C and an increase in the δ18O of conodont apatite and carbonate, which we interpret as consequence of climate cooling. Generally, the Lochkovian was warmer than the Pragian and earliest Emsian.

中文翻译：

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来自布拉格盆地（下泥盆纪，捷克共和国）的 Lochkovian-Pragian 边界区间的氧和碳稳定同位素记录

摘要 Lochkovian-Pragian 事件附近的气候变化仍在广泛讨论中。分析了来自中部到远端碳酸盐斜坡沉积物的碳酸盐 δ18O 和 δ13C 以及牙形磷灰石 δ18O，以提供来自布拉格盆地层型区域的进一步稳定同位素数据。最上层志留纪到较低 Emsian δ18O 趋势被放入更新的牙形石生物地层学框架中。碳酸盐 δ18O 和 δ13C 在相依赖成岩作用的背景下讨论。从不同剖面测量的 δ13C 模式能够将层段与布拉格盆地内不同相的发育相关联。正 δ13C 偏移通常与解释为回归的计算伽马射线 (CGR) 值下降趋势相结合，而负 δ13C 偏移通常与 CGR 中相反的趋势一致。Lochkovian-Pragian 边界区间与碳酸盐 δ13C 的增加以及牙形磷灰石和碳酸盐的 δ18O 的增加相吻合，我们将其解释为气候变冷的结果。一般来说，Lochkovian 比 Pragian 和最早的 Emsian 更温暖。