Sequence stratigraphic subdivision and correlation of the Ediacaran (Sinian)Doushantuo Formation of Yangtze Plate,South China
Yang Aihua1, Zhu Maoyan2, Zhang Junming2, Zhao Fangchen2, Lü Miao2
1 State Key Laboratory for Mineral Deposits Research, School of Earth Sciences and Engineering, Nanjing University, Nanjing 210046, Jiangsu
2 LPS, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing 210008, Jiangsu
Based on field investigations and detailed analyses of lithofacies of the 18 representative sections from the various sedimentary settings,three second-order eustatic sea level changes and three sequence bottom boundaries are identified within the Ediacaran Doushantuo Formation of the Yangtze Plate,South China. The major sequence boundary(SB1)at the base of the Doushantuo Formation which is marked by the interface between the Cryogenian Nantuo diamictites and overlaying cap dolomite. The two major sequence boundaries(SB2 and SB3) are marked by the karstic surfaces are recognizable within the middle and upper portion of the Doushantuo successions in a shallow-water sedimentary setting. But these unconformities are missing in the deeper water setting,the corresponding sequence boundaries(SB2 and SB3)within the Doushantuo successions in the deeper water setting are represented by abrupt shift of lithofacies stacking patterns. The results demonstrate that the Doushantuo successions consist of two and half second-order sequences or super sequences with time span of ca. 35 Ma for SS1(635-600 Ma)and SS2(600-565 Ma),and ca. 14 Ma for SS3-TST(565-551 Ma). The cap dolomite distributed widely at the bottom of Doushantuo Formation and the maximum flooding surfaces in the sequences are important markers for stratigraphic correlation. Present sequence stratigraphic framework of the Doushantuo Formation can be used for stratigraphic correlation of the Doushantuo successions from the shallow-water facies to the deep-water facies of the Yangtze Plate. Meanwhile,our results indicate that the four members subdivision of the Doushantuo Formation based on its type succession in the Yangtze Gorges area is not practical for the whole Yangtze Plate and generally leads to incorrect stratigraphic correlations and confusions of the Doushantuo successions outside the Yangtze Gorges area. Therefore,it is suggested here that subdivision and correlation of the Doushantuo successions should be based on the second-order sequence stratigraphy together with carbon isotpe chemostratigraphy and biostratigraphy. The new stratigraphy framework of Doushantuo Formation will be a good basis for the palaeogeography evolution research and high-precision lithofacies palaeogeographic mapping.
Yang Aihua,Zhu Maoyan,Zhang Junming et al. Sequence stratigraphic subdivision and correlation of the Ediacaran (Sinian)Doushantuo Formation of Yangtze Plate,South China[J]. JOPC, 2015, 17(1): 1-20.
陈孟莪,肖宗正,袁训来. 1994. 晚震旦世的特种生物群落: 庙河生物群新知[J]. 古生物学报,33(4):291-304. 丁连芳,李勇,胡夏. 1996. 震旦纪庙河生物群[M]. 北京:地质出版社,1-221. 范德廉,张涛,叶杰,等. 2004. 中国的黑色岩系及其有关矿床[M]. 北京:科学出版社,1-441. 李忠雄,王剑,段太忠,等. 2003. 湘西北慈利—大庸地区上震旦—下寒武统沉积特征及层序地层划分[J]. 沉积与特提斯地质,23(4):27-33. 刘鹏举,尹崇玉,高林志,等. 2009. 湖北宜昌樟村坪埃迪卡拉系陡山沱组微体化石新材料及锆石SHRIMP U-Pb年龄[J]. 科学通报,34(6):774-780. 马永生,陈洪德,王国力,等. 2009. 中国南方层序地层与古地理[M]. 北京:科学出版社,1-603. 梅冥相,聂瑞贞,张海,等. 2006. 上扬子区震旦系层序地层划分[J]. 现代地质,20(1):49-60. 梅冥相. 2010. 从正常海退与强迫型海退的辨别进行层序界面对比:层序地层学进展之一[J]. 古地理学报,12(5):549-564. 全国地层委员会. 2002. 中国区域年代地层表(1)[J]. 地层学杂志,29(增刊):643-646. 沙庆安,2001. 混积岩一例:滇东震旦系陡山沱组砂质砂屑白云岩的成因[J]. 古地理学报,4(3):36-60. 王传尚,李旭兵,白云山,等. 2011. 湘西北地区震旦系斜坡相区层序地层划分与对比[J]. 地质通报,30(10):1538-1545. 汪啸风,陈孝红,王传尚,等. 2001. 震旦系底界及内部地层单位划分[J]. 地层学杂志,23(增刊):370-376. 王鸿祯,史晓颍. 1998. 沉积层序及海平面变化旋回的分类级别[J]. 现代地质,12(1):1-10. 王自强,高林志,尹崇玉. 2001. 峡东地区震旦系层型剖面的界定与层序划分[J]. 地质论评,47(3):449-436. 王约,王训练,黄禹铭. 2007. 黔东北伊迪卡拉纪陡山沱组的宏体藻类[J]. 地球科学,32(6):828-844. 殷继成,李大庆,何延贵,等. 1984. 四川西南部震旦系的划分与对比[J]. 成都地质学院学报,(增刊):3-30. 尹崇玉,柳永青,高林志,等. 2007. 震旦纪(埃迪卡拉纪)早期磷酸盐化生物群:瓮安生物群特征及其环境演化[M]. 北京:地质出版社,1-143. 游国君,张祖圻. 2000. 浏阳永和磷矿沉积环境与成矿机理[J]. 湖南地质,19(2):90-94. 袁训来,王启飞,张昀. 1993. 贵州瓮安磷矿晚前寒武纪陡山沱期的藻类化石群[J]. 微体古生物学报,10(4):409-420. 袁训来,肖书海,尹磊明,等. 2002. 陡山沱期生物群:早期动物辐射前夕的生命[M]. 安徽合肥:中国科学技术大学出版社,1-133. 赵自强,邢裕盛,马国干,等. 1983. 震旦纪分册·长江三峡地区生物地层学[M]. 北京: 地质出版社,1-143. Barfod G H,Albarède F,Knoll A H, et al. 2002. New Lu-Hf and Pb-Pb age constraints on the earliest animal fossils[J]. Earth and Planetary Science Letters,201(1):203-212. Bowring S,Myrow P,Landing E, et al. 2003. Geochronological constraims on Terminal Neoproterozoic events and the rise of metazoans[M]. Geophysical Research Abstracts,3:13219. Chen D F,Dong W Q,Zhu B Q, et al. 2004. Pb-Pb ages of Neoroterozoic Doushantuo phosphorites in South China:Constraints on early metazoan evolution and glaciation events[J]. Precambrian Research,132:123-132. Chen J Y,Oliveri L C W,Zhou G Q, et al. 2000. Precambrian animal diversity:Putative phosphatized embryos from the Doushantuo Formation of China[J]. Proceedings of the National Academy of Science,USA,97:4437-4462. Chen J,Bottjer D J,Davidson E H, et al. 2006. Phosphatized polar lobe-forming embryos from the Precambrian of Southwest China[J]. Science,312:1644-1646. Chen J,Bottjer D J,Davidson E,H, et al. 2009. Phase contrast synchrotron X-ray microtomography of Ediacaran(Doushantuo)metazoan microfossils:Phylogenetic diversity and evolutionary implications[J]. Precambrian Research,173:191-200. Chen J,Bottjer D J,Oliveri P, et al. 2004. Small bilaterian fossils from 40 to 55 million years before the Cambrian[J]. Science,305:218-222. Condon D,Zhu M Y,Bowring S, et al. 2005. U-Pb ages from the Neoproterozoic Doushantuo Formation,China[J]. Science,308:93-98. Grey K,Walter M R,Calver C R. 2003. Neoproterozoic biotic diversification:Snowball earth or aftermath of the Acraman impact？[J]. Geology,31:439-462. Gradstein F M,Ogg T G,Smith A G, et al. 2004. A new geological time scale,with special reference to Precambrian and Neocene[J]. Episodes,27(2):83-100. Hoffman P F,Kaufman A J,Halverson G P, et al. 1998. A Neoproterozoic snowball Earth[J]. Science,281:1342-1346. Jiang G Q,Kennedy M T,Christic-Blick N. 2003. Stable isotopic evidence for methane seeps in Neoprolenozoic postglacial cap carbonates[J]. Nature,426:822. Jiang G Q,Shi X Y,Zhang S H, et al. 2011. Stratigraphy and paleogeography of the Ediacaran Doushantuo Formation(ca. 635-551Ma)in South China[J]. Gondwana Research,19:831-849. Li C,Love G D,Lyons T W, et al. 2010. A stratified redox model for the Ediacaran Ocean[J]. Science,328:80-83. Liu P,Yin C,Chen S, et al. 2011. Biostratigraphic succession of acanthomorphic acritarchs of the Ediacaran Doushantuo Formation,Yangtze Gorges area,South China,and correlation with Australia[J]. Precambrian Research,doi:10.1016/j.precamres.2011.07.009. Lu M,Zhu,M,Zhao F. 2012. Revisiting the Tianjiayuanzi section: The stratotype section of the Ediacaran Doushantuo Formation,Yangtze Gorges,South China[J]. Bulletin of Geosciences,87:183-194. McFadden K A,Xiao S H,Zhou C M, et al. 2009. Quantitative evaluation of the biostratigraphic distribution of acanthomorphic acritarchs in the Ediacaran Doushantuo Formation in the Yangtze Gorges area,South China[J]. Precambrian Research,173:170-190. Plint A G,Nummedal D. 2000. The falling stage systems tract:Recognition and importance in sequence stratigraphic analysis[J]. The Geologic Society of London,special publication,172:1-17. Ramsbottom W H C. 1979. Rates of transgression and regression in the Carboniferous of NW Europe[J]. Geological Society of London Journal,136:147-153. Vail P R,Mitchum R M,Thompson S Ill. 1977. Seismic Stratigraphy and Global Changes of Sea Level,Part 3:Relative Changes of Sea Level from Coastal Onlap[A]. In:Payton C W(ed). Seismic Stratigraphy: Applications to Hydrocarbon Exploration[M]. American Association of Petroleum Geologists, Memoir 26:83-97. Xiao S,Zhang Y,Knoll A H. 1998. Three-dimensional preservation of algae and animal embryos in a Neoproterozoic phosphorite[J]. Nature,391:553-558. Yin L M,Zhu M Y,Knoll A H, et al. 2007. Doushantuo embryos preserved inside diapause egg cysts[J]. Nature,446(3):661-663. Zhu M Y,Gehling J G,Xiao S H, et al. 2008. An eight-armed Ediacaran fossil preserved in contrasting taphonomic windows from China and Australia[J]. Geology,36:867-870. Zhu M Y,Zhang J M,Yang A H. 2007. Integrated Ediacaran(Sinian)chanronostratigraphy of South China[J]. Palaeogeography,Palaeoclimatology,Palaeoecology,234(6):7-61. Zhu M Y,Lu M,Zhang J M, et al. 2011. Carbon isotope chemostratigraphy and sedimentary facies evolution of the Ediacaran Doushantuo Formation in western Hubei,South China[J]. Precambrian Research, doi:10.1016/j.precamres.2011.07.019.郑秀娟
