碎屑锆石U-Pb和(U-Th)/He双重定年通过测定锆石的形成和冷却年龄提供了一个强有力的物源分析工具。然而美国中央大陆MVT铅锌矿床成矿研究揭示了区域性的热液活动，其对碎屑锆石(U-Th)/He系统以及双重定年技术应用的影响尚不明确。在本研究中，拟选取位于美国中央大陆沃希托造山带、阿科玛前陆盆地和欧扎克MVT铅锌矿区之间的阿科玛陆架古生代沉积体系为研究对象。通过对重点碳酸盐岩与碎屑岩层段进行系统热液示踪以及对砂岩层段碎屑锆石进行双重定年分析，试图理清研究区古生代区域热液活动特征及影响范围、热液对锆石（U-Th）He体系影响模式，落实热液活动在双重定年物源分析中的角色。本项目综合运用沉积学、岩石学、矿床学、地质-热年代学等理论与技术，重视热液活动在低温热年代学中的作用，可以为相关背景下双重定年分析的取样与数据解释提供新的约束条件，具有重要的现实意义。

The U-Pb and (U-Th)/He (Pb-He) double dating on detrital zircon provides a powerful tool for provenance analysis by providing both the formation and cooling ages. However, the formation of MVT Pb-Zn deposits in US midcontinent reveals regional hydrothermal events whose effect on detrital geo-thermochronology is not clear. In this study, we plan to choose the Arkoma Shelf located between the Ouachita orogenic front，Arkoma Basin and the world-class MVT Pb-Zn districts in Ozark region as the study area and conduct systematic tracing of hydrothermal activities on the carbonate and clastic intervals and Pb-He double dating analysis on detrital zircon from sandstone intervals. The study will work on characterizing the regional hydrothermal activity，tracing the transport paths and influenced zone, deciphering the effect on both zircon (U-Th)/He system and provenance analysis through double dating. The study combines both theories and techniques on sedimentology，petrology，ore deposit geology and geo-thermochronology and emphasizes the role of hydrothermal activity and might come up with new constraint on sample strategy and data interpretation for double dating research.