上扬子周缘新元古界古油藏与铅锌矿共生聚集成藏成矿耦合作用的年代学约束

油气藏和铅锌矿床的精确定年是成藏成矿作用过程和机理研究最为关注的核心科学问题。油气藏与铅锌矿在空间上密切共生或伴生，指示了两者成因上的有机联系以及成矿成藏过程和机理的相似性。研究以上扬子周缘三个典型新元古界古油藏和共生的铅锌矿及伴生的脉体矿物作为研究对象，采用高精度同位素定年技术，开展沥青Re-Os、闪锌矿Rb-Sr、闪锌矿流体包裹体Ar-Ar以及伴生矿物黄铁矿Re-Os和石英流体包裹体Ar-Ar等定年分析。通过多种地质定年方法的相互结合、相互验证，并以脉体的定年和流体活动作为纽带，从年代学的角度构建成藏与成矿的耦合关系，定量重建油气成藏和铅锌成矿的年代学格架。研究试图建立成藏-成矿的同位素直接定年方法和技术组合，促进成藏成矿过程机理的研究。研究将成藏与成矿的理论和方法有机结合并互为借鉴，有助于深入揭示油气藏与铅锌矿在时空上和成因上的联系，也将为油气和金属矿产的协同勘同和综合预测提供帮助。

The accurate dating of petroleum reservoir and Pb-Zn deposits is a key scientific issue for the process and mechanism studies of hydrocarbon accumulation and metal mineralization. The intimate coexistence of Pb-Zn deposits with oil-gas reservoir indicates their genetic cause linkage and similar process and mechanism. In this study, three representative Neoproterozoic paleo-reservoirs with coexisting Pb-Zn deposits and their associated vein minerals are chosen as the research objects in the periphery of the upper Yangtze block. The key technologies mainly are the fluid inclusion Ar-Ar dating, the pyrite and bitumen Re-Os isotope geochronology, the sphalerite Rb-Sr dating and so on. This study will carry out the chronological framework construction of petroleum accumulation and Pb-Zn mineralization, and also establish their coupling relationship through multiple geochronology methods, using the dating of vein minerals and fluid activities as the bridge. This study attempts to establishment the isotopic direct dating methods and technologies for the multiple hydrocarbon accumulation and metal mineralization, which will contribute to the study on the process and mechanism of hydrocarbon accumulation and Pb-Zn mineralization. Combining the theory and methods of reservoir formation and metal mineralization and learn from each other will help to further reveal the spatial-time and origin relationship. It will provide the help for the petroleum and metal mineral cooperative exploration and comprehensive forecast.