中文摘要：

浙江江山北部处于紧邻江山-绍兴断裂带的扬子地块边缘;寒武系杨柳岗组陆源碎屑岩夹层中的碎屑锆石LA-ICP-MSU-Pb定年结果表明,年龄范围为515-3340 Ma,主峰年龄828 Ma,其次为727 Ma及916 Ma;与邻区的对比结果显示,研究区碎屑锆石年谱与华夏地块闽西北-赣中东部以及扬子地块赣东北-皖南地区可对比,尤其与前者最为相近,而与华夏地块闽西南-赣南地区差异显著.杨柳岗组及其上覆华严寺组同沉积褶皱以及下伏大陈岭组单向斜层理特征表明,沉积基底向北西倾斜,沉积物搬运方向由南东向北西.综合这两方面推测：在杨柳岗组沉积时期,研究区具有向北西倾斜的沉积基底,向东南方向应与剥蚀区相连,陆源碎屑物应源自其东南方向的华夏地块东部;剥蚀区可能位于现今包括江绍构造带在内的浙江中部,向北西方向主要提供前寒武系陈蔡群和相当于河上镇群以及少量双溪坞群或者三者剥蚀物再沉积地层的剥蚀物质.

英文摘要：

In this study, the age spectra of detrital zircons and sedimentary directional structures are used to investigate the paleogeographic features, especially the paleogeography in east Cathaysian Block. The dating results of detrital zircons from clastic interlayers of the Yangliugang Formation in northern Jiangshan of Zhejiang Province, which lies on the southeastern margin of the Yangtze Block, show that the ages range from 515 Ma to 3340 Ma, with a major peak at 828 Ma and secondary peaks at 727 Ma and 916 Ma in the detrital age spectrum. Moreover, the result of spectrum correlation suggests that northern Jiangshan might be affinity to northwestern Fujian and eastern central Jiangxi in the Cathaysian Block as well as northeastern Jiangxi and southern Anhui in the Yangtze Block, however, irrelative with southwestern Fujian and southern Jiangxi in the Cathaysian Block. On the other hand, the features of sedimentary directional structures, which include syndepositional slump folds in the Yangliugang Formation and the overlying Huayansi Formation and cross beddings in the underlying Dachenling Formation, indicate that the sedimentary basement inclined toward the northwest and the sediment transport direction was from the southeast to the northwest during depositional periods these formations. And then, it can be deduced that the provenance of zircon-bearing clastics in the Yangliugang Formation might be located in the nowadays central part of Zhejiang Province of eastern Cathaysian Block, in which there are outcrops of metamorphic rocks with known age corresponding to 42% detrital zircons in this study. Toward the northwest, the detrital source might have supplied clastics eroded from older strata or redeposited materials originated from older strata. These strata mainly include the Chencai Group and the equivalent to Heshangzhen Group and Shuangxiwu Group, which contain intrusive and volcanic rocks.