摘要:
在全面收集中国及邻区花岗岩年代学资料的基础上,在包括俄罗斯、蒙古、吉尔吉斯坦、韩国、日本、越南等境外地区开展了野外调研,获得大量高精度锆石U-Pb年龄,发现一些重大岩浆事件;结合系统收集的公开发表的高质量数据,建立了一些关键地区的花岗岩年代学格架;初步总结了中亚、中央、特提斯和环太平洋构造域花岗岩的时空分布及构造-岩浆演化,提供相关成矿背景,编制了四个构造域的花岗岩时空分布图.在此基础上,初步编制了亚洲花岗岩时空分布图,总结了花岗岩浆作用与构造演化的关系,为探讨亚洲大地构造演化,特别是陆块聚合过程的研究提供了依据.这是一次尝试性的较系统地论述亚洲花岗岩及构造-岩浆演化的研究.
关键词:
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花岗岩
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年代学
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岩浆演化
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成矿
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造山带
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亚洲
Abstract:
Based on extensive collection of granitoid chronology data and information,a large number of fieldworks had been done in the key areas of the main orogenic belts in Asia,including foreign countries,such as Russia,Mongolia,Kyrgyzstan,South Korea,Japan,and Vietnam. Many high precision zircon U-Pb ages and geochemistry data had been got with a lot of careful analyses in laboratories,and some important magmatic events had been found. Combined with the high quality published data,the geochronological frameworks of granitoids from some key areas were built,and a preliminary summary of the temporal and spatial distribution and tectonic magmatic evolution of the granitoids from the Central Asian Orogenic Belt,Central Orogenic Belt (Qilian-Qinling). Tethys and West Pacific tectonic domain were obtained,providing relevant tectonic background for the mineral resources exploration. Based on above researches,a draft map of Asian granitoids with database has been made,and the tectonic evolution of Asian granitoids has also been published. It provides the basis for discussing the Asian tectonic evolution,especially for the process of continental convergence. This is the first approach to systematical discussion of the Asian granitoid magmatic evolution by Chinese researchers.
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