中文摘要：

在二叠的 Changxing 形成礁石的深、极端深的煤气的水库的最近的发现，东北四川盆在中国是在海洋的碳酸盐油与煤气的探索的重要开发。礁石白云石和他们的起源是为 sedimentologists 和油与煤气的地质学家的主要研究话题。岩相学，踪迹元素和礁石白云石的同位素地球化学显示白云石被低 Sr 和 Mn 内容，相对低的 Fe 内容，很类似的 13C 和 18O 描绘价值和很不同的 87Sr/86Sr 比率。尽管混合的液体的计算结果建议了那有85%95%的混合物大气的水和5%15%海水似乎是礁石白云石的 dolomitizing 液体，低 Mn 内容，相对低的 Fe 内容，高 13C 价值和白云石的高 homogenization 温度没支持有在化成白云石过程，和也接近了同时代的海水的 87Sr/86Sr 比率的大气的水的大比例，这没支持 mixt 的可能性从在埋葬 diagenetic 期间的广泛地分布式的三叠纪的 evaporites 的溶解的有低 Mn 和 Fe 的深埋葬的传播海水满足的高温度，高 Sr 内容和高 13C 值处理(忍受水的 evaporites 的包括的脱水) 能是礁石白云石的 dolomitizing 液体。

英文摘要：

The recent discovery of deep and ultra-deep gas reservoirs in the Permian Changxing Formation reefs, northeastern Sichuan Basin is a significant development in marine carbonate oil ＆ gas exploration in China. Reef dolomites and their origins have been major research topics for sedimentologists and oil ＆ gas geologists. The petrography, trace element and isotope geochemistry of the reef dolomites indicated that the dolomites are characterized by low Sr and Mn contents, relatively low Fe contents, very similar δ13C and 6180 values and very different 87Sr/86Sr ratios. Although the calculated results of the fluid mixing suggested that a mixture with 85%-95% meteoric water and 50/o- 15% seawater seemed to be the dolomitizing fluids of the reef dolomites, the low Mn contents, relatively low Fe contents, high δ13c values and high homogenization temperatures of the dolomites did not support that there were large proportions of meteoric water in the dolomitization process, and the 87Sr/86Sr ratios which were close to coeval seawater also did not support the possibility of the mixture of deep-burial circulated fluids from clastic rocks. High temperature deep-burial circulated seawater with low Mn and Fe contents, high Sr content and high δ13C values from the dissolution of widely distributed Triassic evaporites during the burial diagenetic processes （including dehydration of water-bearing evaporites） could have been the dolomitizing fluids of the reef dolomites.