ON THE STIPULATION OF THE QINGBAIKOU SYSTEM IN THE SOUTH CHINA
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摘要: 中国南方是否存在青白口系,以及如何划分、对比,是长期争论的重要地质问题.作者遵循构造岩浆旋回划分前寒武系的基本原则,根据区域不整合面、沉积建造,结合同位素地质年龄、微古植物组合,以扬子地区为重点,进行分析研究,提出中国南方青白口系的底界为晋宁运动造成的不整合面,顶界在与莲沱组底界或与莲沱组相当层位的底界交界处,同位素地质年龄分别为10±、8±亿年.文中并分区叙述青白口系的地层特征.Abstract: There has been a long debate upon the important question whether the Qingbaikou System developed in South China and how its division and correlation can be made.In accordance with the principles of tectonomagmatic cycles,the Precambrian Systems mainly in Yangtze region are divided,studied and analysed in the paper,on the basis of the regional unconformity,sedimentary formation and correlation combined with the data of iso-topic age and micropaleobotany assemblage.The author proposes a scheme for the division and correlation of the Qingbaikou System in South China.Its bottom boundary is an unconformity resulted from the Jinning Movement,and its top boundary is at the bottom boundary of Liantuo Formation or the bottom boundary of equivalent horizons to Liahtuo Formation,with the isotopic ages being 100±Ma and 80±Ma,respectively.The strati-graphic characteristics of the system are discussed for each subarea.
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[1] 马国干等.华南地区展且纪时限范围的研究·宜昌地质矿产研究所所刊,1984,第8号 [2] 王曰伦等.中国上前寒武系的划分和对比.中国震且亚界,天津科学技术出版社,1980 [3] 王鸿祯.中国晚元古代构造和古地理.地质科学,1980,(2) [4] 王鸿祯等.中国古地理图集.北京:地图出版社,1985 [5] 水涛等.中国浙闽变质基底地质.北京:科学出版社,1988 [6] 刘家远等.华南前寒武纪花岗岩类岩浆作用的演化与内生金属成矿.江西地质,1988,(2) [7] 地矿部中国同位素地质年表工作组.中国同位家地质年表.北京:地质出版社,1987 [8] 刘鸿允.展旦系有关间题的讨论.北京:地质科学,1982,(3) [9] 刘鸿允.前寒武系的划分——中国南方前寒武系的划分与对比.前寒武纪论文集,北京:地质出版社,1983 [10] 孙家聪.云南罗茨澄江组下部火山岩系的发现与展旦系底界年龄的讨论.地质科学,1985.(4) [11] 邢裕盛等.鄂西震且亚界徽古植物及其地层愈义.地层古生物论文集,北京:地质出版社,1980.第8辑 [12] 李根坤等.福建省同位素年龄及其区域地质构造意义.福建地质,1988,(2) [13] 李继亮.川西盐边群的优地槽岩石组合.地科院院报,1984,第8号 [14] 吴根耀.乌斯大桥群火山岩形成的大地构造环境.江西地质,1983.(2) [15] 陈思本.簳东北前震且纪变质火山岩的同位素年龄及其地质愈义.中国区域地质,1988,(2) [16] 陈晋镰等.蓟县震且亚界的研究.中国震且亚界,天津科学技术出版社,1980 [17] 《苏皖北部上前寒武系研究》项目协作组,苏皖北部上前寒武系研究(地质矿产部中国晚前寒武纪地质科技成果之五).合肥:安徽科学技术出版社,1984 [18] 周祈民等.安徽歙县伏川蛇绿岩套的Sm-Nd等时线年龄及其地质意义.北京:科学通报,1989,(16) [19] 胡世玲、刘鸿允等.据40Ar/39Ar快中子年龄新资料论震且系底界年龄.地质科学,1989,(1) [20] 徐备等.技东北晚元古代蛇绿岩套的Sm-NdD同位素年龄及原始构造环境.南京大学学报(地球科学),1989,(3) [21] 董榕生等.川西甘洛苏雄早震且世地层及其火山岩系特征.成都地质学院学报,1999,(2) -
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