中国东部中生代发育的大量火山岩多数属于钾质火山岩的范畴,这已经被许多岩石学、矿物学和地球化学分析资料所证实(汪洋等,2004;汪洋,2007)。江苏溧水盆地是长江中下游中生代沿江火山岩带中著名的火山岩区之一,与邻近的宁芜、宁镇等矿床富集地区的火山岩一直受到广泛关注,但它 Most of the volcanic rocks developed in the Mesozoic in eastern China belong to the category of potassic volcanics. This has been confirmed by many petrological, mineralogical and geochemical data (Wang Yang et al., 2004; Wang Yang, 2007). Lishui Basin, Jiangsu Province, is one of the most famous volcanic rocks along the Mesozoic volcanic belt in the middle and lower reaches of the Yangtze River. It has been widely concerned with the volcanic rocks in the ore-rich areas such as Ningwu and Ningzhen,