Palynological Assemblage in Section D of Meishan, Changxing, Zhejiang and Its Significance of Global Correlation
-
摘要: 在长兴煤山D剖面下三叠统殷坑组14 m厚的地层内(第25-60层)密集采孢粉样89件, 从12块样品中获得孢粉化石47属50种, 据此将该剖面下三叠统底部的孢粉组合定为Lundbladispora-Taeniaesporites-Equisetosporites组合.组合中裸子植物花粉占优势, 为59.0%~79.6%;蕨类植物孢子次之, 为20.4%~41.0%;裸子植物花粉中以无肋双气囊类花粉为主, 含量为19.7%~54.4%, 多沟类花粉虽仅见Equisetosporites一属, 但含量高, 最高达24.3%.蕨类植物孢子中光面三缝孢类含量最高, 为14.3%~24.4%, 以圆形的Puncatisporites为主, 最高可达16.2%.孢粉组合Lundbladispora-Taeniaesporites-Equisetosporites与同一剖面的早三叠世牙形石第2带Isarcicella isarcica带及第3带Clarkina carinata-C.planata带相重合.这对当前正在进行的陆相二叠系-三叠系界线的准确划分提供了重要的参照系.研究还表明, 煤山D剖面早三叠世早期的孢粉组合与中国北方区的早三叠世同期的孢粉组合对比较为困难, 而与华南各地的对比较为吻合, 说明中国南、北方古生代孢粉组合向中生代孢粉组合转变的时间并不一致, 北方较早, 南方较晚.Abstract: Altogether 47 genera and 50 species were identified in 12 of all the 89 samples taken within 14 m Yinkeng Formation (Bed 25-60) in Meishan Section D (GSSP) of Changxing in Zhejiang. The palynological assemblage is Lundbladispora-Taeniaesporites-Equisetosporites with the dominance (59.0%-79.6%) of gymnosperm pollen and secondary (20.4%-40.0%) of fern spore. The gymnosperm pollen was dominated by the instriate bisaccate (19.7%-54.4%) characterized by the greatest diversity and abundance of coniferousbisaccate pollen. The striate bisaccate pollen is secondary and the polyclicate pollen composed of only one genus Equisetosporites has an abundance up to 24.3%. The fern spore was dominantly represented by Liotriletes (14.3%-24.4%) with the predominance of the cycloid Puncatisporites (16.2%). The secondary are the echinate, granular and verrucose trilete spores (1.9%-21.2%). The fastigiate trilete spore has a relatively low quantity but spreads wide, mainly Lundbladispora. Zonotrilete spore is quite rare. Significantly, this palynological assemblage in Section D of Meishan, correlative with the conodont Isarcicella isarcica Zone and the Clarkina carinata-C. planate Zone, is comparable with palynological assemblages observed in other sections in South China but incompatible with those in North China. This discrimination suggests the earlier evolution of Mesozoic palynological assemblage in North China than in South China.
-
图 1 全球二叠系—三叠系界线层型剖面——中国浙江长兴煤山D剖面二叠系—三叠系界线层和殷坑组实测剖面图
Fig. 1. Global Permian-Triassic boundary stratotype section—Section D of Meishan, Changxing County, Zhejiang Province, China, showing Permian-Triassic boundary beds and Yinkeng Formation
图 2 全球二叠系—三叠系界线层型剖面——中国浙江长兴煤山D剖面早三叠世殷坑组柱状图
1.粘土岩; 2.钙质泥岩; 3.炭质泥岩; 4.泥质粉砂岩; 5.泥灰岩; 6.泥质灰岩; 7.含泥质灰岩; 8.泥晶灰岩; 9.丘状层理; 10.水平层理; 11. 生物挠动; 12.岩层颜色; 13.有孔虫; 14.;15.牙形石; 16.腕足动物; 17.双壳动物; 18.菊石; 19.孢粉
Fig. 2. Column of Yinkeng Formation of Early Triassic of global Permian-Triassic boundary tratotype section(GSSP)—Section D of Meishan, Changxing County, Zhejiang Province, China
表 1 煤山D剖面早三叠世早期孢粉属种及含量统计
Table 1. Palynological categories and content statistic of Early Triassic in Section D of Meishan, Changxing County, Zhejiang Province, China
表 2 煤山D剖面早三叠世早期孢粉属种及含量统计
Table 2. Palynological categories and content statistic of Early Triassic in Section D of Meishan, Changxing County, Zhejiang Province, China
-
[1] Foster, C.B., 1979. Permian plant microfossils of the Blair Athol coal measures, Baralaba coal measures and Basal Rewan Formation of Queensl. Publ., 372, Palaeontol., 45: 1 244. [2] Hu, G.Q., Xu, X.F., Sun, P., 1999. Discovery of the Early Triassic strata and palynomorphs in Eren basin, nei Mongol. Journal of Stratigraphy, 23 (4): 263-269(in Chinese with English abstract). [3] Institute of Geology of Chinese Academy of Geological Sciences, Institute of Exploration and Development Research of Xinjiang Bureau of Geology and Mineral Resources, 1986. Permian-Triassic strata and fossil assemblages in the Dalongkou area of Jimsar, Xinjiang. No. 3 Geological Memoirs(Series 2)of Ministry of Geology and Mineral Resources, P. R.C. . Geological Publishing House, Beijing, 70-110(in Chinese). [4] Ji, L. X., Ouyang, S., 1996. Spore-pollen assemblage from Buqingshan Group, Qinghai and its geological age. Acta Palaeontologica Sinica, 35(1): 1-25(in Chinese with English abstract). [5] Lai, X.L., Wignall, P.B., Zhang, K.X., 2001. Palaeoecology of the conodonts Hindeodus and Clarkina during the Permian-Triassic transitional period. Palaeogeography, Palaeoclimatology, Palaeoecology, 171: 63-72. doi: 10.1016/S0031-0182(01)00269-3 [6] Liu, Z.S., 1999. Triassic palynological assemblages from the northern margin in Tarim basin of Xinjiang, NW China. Acta Palaeontologica Sinica, 38 (4): 474-504(in Chinese with English abstract). [7] Lozovsky, V.K., 1991. Proposal for a new working group on continental beds at the Permian/Triassic boundary in the continental series. Permophiles, 19: 7-11. [8] Mei, S.L., Zhang, K.X., Wardlaw, B.R., 1998. A refined succession of Changhsingian and Grriesbachian neogondolellid conodonts from the Meishan Section, candidate of the global stratotype section and point of the Permian-Triassic boundary. Palaeogeography, Paleoclimatology, Palaeoecology, 143: 213-226. doi: 10.1016/S0031-0182(98)00112-6 [9] Ouyang, S., John, U., 1990. Palynology of Upper Permian and Lower Triassic rocks, Meishan, Changxing County, Zhejiang Province, China. Review of Palaeobotany and Palynology, 66: 65-103. doi: 10.1016/0034-6667(90)90029-I [10] Ouyang, S., 1986. Palynology of Upper Permian and Lower Triassic strata of Fuyuan district, eastern Yunnan. Science Press, Beijing, 122 (in Chinese). [11] Qu, L. F., 1980. Triassic sporopollen assemblage, Mesozoic stratigraphy and palaeontology of Shaan-Gan-Ning basin (First Half). Geological Publishing House, Beijing, 115-134(in Chinese). [12] Tong, J.N., Yang, Y., 1998. Advance in study of the Lower Triassic conodonts at Meishan Section, Zhejiang Province. Chinese Science Bulletin, 43 (16): 1350-1353. doi: 10.1007/BF02883680 [13] Wang, S.Y., Yin, H.F., 2001. Study on terrestrial PermianTriassic boundary in eastern Yunnan and western Guizhou. China University of Geosciences Press, Wuhan, 88(in Chinese). [14] Yang, Z.Y., Sheng, J.Z., Yin, H.F., 1996. The Permian-Triassic boundary: The global stratotype section and point. Episodes, 18 (1-2): 49-54. [15] Yin, H.F., 1985. On the transitional bed and the Permian-Triassic boundary in South China. Newsletters on Stratigraphy, 15 (1): 13-27. doi: 10.1127/nos/15/1985/13 [16] Yin, H., Sweet, W.C., Glenister, B.F., et al., 1996. Recommendation of the Meishan Section as global stratotype section and point for basal boundary of Triassic System. Newsletters on Stratigraphy, 34 (2): 81-108. doi: 10.1127/nos/34/1996/81 [17] Yin, H.F., Zhang, K.X., Tong, J.N., et al., 2001. The global stratotype section and point(GSSP)of the Permian-Triassic boundary. Episodes, 24 (2): 102-114. doi: 10.18814/epiiugs/2001/v24i2/004 [18] Zhang, K.X., Lai, X.L., Ding, M.H., et al., 1995. Conodont sequence and its global correlation of Permian-Triassic boundary in Meishan Section, Changxing, Zhejiang Province. Earth Science—Journal ofChina University of Geosciences, 20 (6): 669-676(in Chinese with English abstract). [19] 胡桂琴, 徐晓锋, 孙平, 1999. 内蒙古二连盆地早三叠世地层及孢粉组合的发现. 地层学杂志, 23(4): 263-269. https://www.cnki.com.cn/Article/CJFDTOTAL-DCXZ199904003.htm [20] 中国地质科学院地质研究所, 新疆石油管理局勘探开发研究所, 1986. 新疆吉木萨尔大龙口二叠、三叠纪地层及古生物群. 中华人民共和国地质矿产部地质专报(二、地层古生物), 第三号. 北京: 地质出版社, 70-110. [21] 冀六祥, 欧阳舒, 1996. 青海中东部布青山群孢粉组合及其时代. 古生物学报, 35(1): 1-25. https://www.cnki.com.cn/Article/CJFDTOTAL-GSWX199601000.htm [22] 刘兆生, 1999. 塔里木盆地北缘三叠纪孢粉组合. 古生物学报, 38(4): 474-504. doi: 10.3969/j.issn.0001-6616.1999.04.006 [23] 欧阳舒, 1986. 云南富源晚二叠世—早三叠世孢粉组合. 北京: 科学出版社, 122. [24] 曲立范, 1980. 三叠纪孢子花粉, 陕甘宁盆地中生代地层古生物(上册). 北京: 地质出版社, 115-134. [25] 王尚彦, 殷鸿福, 2001. 滇东黔西陆相二叠纪—三叠纪界线地层研究. 武汉: 中国地质大学出版社, 88. [26] 张克信, 赖旭龙, 丁梅华, 等, 1995. 浙江长兴煤山二叠—三叠系界线层牙形石序列及其全球对比. 地球科学——中国地质大学学报, 20(6): 669-676. https://www.cnki.com.cn/Article/CJFDTOTAL-DQKX506.009.htm -
下载:
点击查看大图
图(3) / 表(2)
计量
- 文章访问数: 3564
- HTML全文浏览量: 127
- PDF下载量: 2
- 被引次数: 0
