安徽巢湖地区下三叠统综合层序

童金南; 赵来时; 左景勋; HansenHans J.; ZakharovYuri D.

安徽巢湖地区下三叠统综合层序

1.
地质过程与矿产资源国家重点实验实(中国地质大学), 湖北武汉 430074
2.
丹麦哥本哈根大学地质研究所, 哥本哈根 DK-1350
3.
俄罗斯科学院远东地质研究所, 符拉迪沃斯托克 690022

基金项目:

国家自然科学基金项目 40325004

国家自然科学基金项目 40232025

国家"973"项目 G200007705

教育部科技重点项目 03033

地质过程与矿产资源国家重点实验室开放基金项目 MGMR2002-22

详细信息

作者简介:
童金南(1962-), 男, 教授, 博士生导师, 现主要从事三叠纪及二叠系—三叠系界线地层和古生物学研究. E-mail: jntong@cug.edu.cn

中图分类号: P534.51
计量
- 文章访问数: 3544
- HTML全文浏览量: 115
- PDF下载量: 1
- 被引次数: 0
出版历程
- 收稿日期: 2004-11-15
- 刊出日期: 2005-01-25

An Integrated Lower Triassic Sequence in Chaohu, Anhui Province

1.
State Key Laboratory ofGeo-Processes and Mineral Resources, China University ofGeosciences, Wuhan 430074, China
2.
Geological Institute, Copenhagen University, DK-1350 Copenhagen, Denmark
3.
Far Eastern Geological Institute, Russian Academy ofSciences, Vladivostok 690022, Russia

摘要

摘要: 印度阶-奥伦尼克阶界线的全球层型候选剖面之一位于安徽巢湖地区; 巢湖地区的下三叠统也是国际上同期地层中生物地层序列最有代表性、多重地层学手段应用齐备、研究效果最好的地层序列之一.根据巢湖地区3条代表性下三叠统剖面的岩石地层、生物地层和碳同位素地层的最新研究成果归纳出本区早三叠世综合地层序列, 作为区域地层对比研究的标准.巢湖的下三叠统明确包含8个牙形石带和6个菊石带, 它们具有区域甚至全球对比意义; 巢湖地区早三叠世碳同位素δ¹³C_carb的演变呈现2个显著的漂移周期, 这种有特色的碳同位素漂移, 不仅具有地层学价值, 而且可能对于三叠纪初的生物复苏和生态系演变具有指导意义.在综合地层序列基础上, 将3条剖面的古地磁学研究成果链接, 形成了巢湖地区完整的早三叠世磁性地层序列, 包括5个主要的正向极性带和5个反向极性带, 这也是目前在本区乃至华南获得的最完整的早三叠世磁极性序列之一.这些为该区域乃至全球相关地层研究树立了一个基本格架.
- 下三叠统 /
- 生物地层 /
- 碳同位素地层 /
- 磁性地层 /
- 安徽巢湖
Abstract: One of the GSSP(Global Stratotype Section and Point)candidates for the Induan-Olenekian boundary is situated in Chaohu, central Anhui Province, southeast China. Chaohu also has a representative and well-expressed Lower Triassic sequence that has been better studied in various aspects. This paper presents an integrated and comprehensive Lower Triassic sequence of Chaohu to serve for a standard regional stratigraphical sequence, based upon up-to-date achievements in the studies of lithostratigraphy, biostratigraphy and carbon isotope stratigraphy at three sections in the area. Eight conodont zones and six ammonoid zones are consequently well distinguished in the Lower Triassic of Chaohu, and most of them are regionally or even globally correlative. The δ¹³C_carb excursion shows two characteristic shifting periods, and this carbon isotope sequence is not only of a stratigraphic value but also of great importance to understanding the biotic recovery and ecosystem reconstruction at the beginning of the Triassic. In the light of the integrated Lower Triassic sequence, a complete Lower Triassic magnetic stratigraphic sequence is established from the data at the three sections. The Lower Triassic covers five major normal polarity zones and five reversed polarity zones, and both the Permian-Triassic boundary and the Induan-Olenekian boundary are located inside normal polarity zones.
- Lower Triassic /
- biostratigraphy /
- carbon isotope stratigraphy /
- magnetostratigraphy /
- Chaohu

HTML全文

图 1 安徽巢湖交通位置和研究区地质简图

D₃.上泥盆统; C₁.下石炭统; C₂.上石炭统; P₁.下二叠统; P₂.中二叠统; P₃l.龙潭组; P₃d.大隆组; T₁y.殷坑组; T₁h.和龙山组; T₁n¹.南陵湖组下段; T₁n².南陵湖组中段; T₁n³.南陵湖组上段; T₂d.东马鞍山组; Q.第四系; A₁+A₂.马家山南剖面; B.平顶山西剖面; C.平顶山北剖面

Fig. 1. Traffic location and brief local geological map of Chaohu, Anhui Province

下载: 全尺寸图片幻灯片

图 2 安徽巢湖早三叠世地层剖面对比

Fig. 2. Correlation of the Lower Triassic stratigraphic sections in Chaohu, Anhui Province

下载: 全尺寸图片幻灯片

图 3 安徽巢湖地区早三叠世综合地层序列

CX.长兴阶; DL.大隆组; NP.平顶山北剖面; UP.上二叠统; N.正向极性带; R.反向极性带

Fig. 3. Integrated Lower Triassic sequence in Chaohu, Anhui Province

下载: 全尺寸图片幻灯片

参考文献(31)

[1]	Chen, Z.L., 1985. Early Triassic ichthyosaurs from Chao-xian, Anhui. Regional Geology ofChina, 15: 139-146(in Chinese with English abstract).
[2]	Ding, M.H., 1984. Lower Triassic conodonts from the Mountain Majiashan in Anhui Province and their stratigraphic significance. Earth Science—Journal of Wuhan College of Geology, 9(2): 37-48(in Chinese with English abstract).
[3]	Guo, P.X., 1982. On the occurrence of late Lower Triassic ammonoids from Anhui and Jiangsu. Acta Palaeontologica Sinica, 21(5): 560-567(in Chinese with English abstract).
[4]	Guo, P.X., Xu, J.C., 1980. Knowledge on the age of Qing-long Group in Chaoxian, Anhui Province. Journal ofStratigraphy, 4(4): 310-315(in Chinese with English abstract).
[5]	Li, J.H., 1979. New data of the Lower Triassic lamellibranch fossils from Chaohu, Anhui Province. Geology of Eastern China, (2): 96-103(in Chinese).
[6]	Li, J.H., 1981. Two new lamellibranch genera from Lower Triassic of Anhui. Acta Palaeontologica Sinica, 20(4): 325330(in Chinese with English abstract).
[7]	Li, S.W., Wu, S.H., 1988. Study on petrology and sedimentary environments of the Qinglong Group of the Lower-Middle Triassic in Chaoxian, Anhui. In: Feng, Z.Z., ed., Study on lithofacies paleogeography of Qinglong Group of Lower-Middle Triassic in the Lower Yangtze River region. Yunnan Science and Technology Press, Kunming, 82-92(in Chinese).
[8]	Peng, Y.Q., Tong, J. N., Gao, Y.Q., et al., 1999. Lower Triassic Griesbachian cycle sediments in Chaohu, Anhui Province, China. In: Yin, H.F., Tong, J.N., eds., Proceedings of the international conference on Pangea and the Paleozoic-Mesozoic transition. China University of Geosciences Press, Wuhan, 29-34.
[9]	Peng, Y.Q., Tong, J.N., Gao, Y.Q., 2001. Griesbachian cyclostratigraphy at Majiashan Section, Anhui Province, China. Journal ofChina University ofGeosciences, 12(1): 22-26.
[10]	Peng, Y.Q., Tong, J.N., Shi, G.R., et al., 2001. The Permian-Triassic boundary set: Characteristics and correlation. Newsletters on Stratigraphy, 39(1): 55-71. doi: 10.1127/nos/39/2001/55
[11]	Sweet, W.C., Mosherm, L.C., Clark, D.L., et al., 1971. Conodont biostratigraphy of the Triassic. In: Sweet, W.C., Bergstrom, S.M., eds., Symposium on conodont biostratigraphy. GSA Memoir, 127: 441-465.
[12]	Tong, J.N., 1997. Lower Triassic sequence stratigraphy of Chaoxian, Anhui. Acta Geoscientia Sinica, 18(2): 215219(in Chinese with English abstract).
[13]	Tong, J.N., Qiu, H.O., Zhao, L.S., et al., 2002. Lower Triassic inorganic carbon isotope excursion in Chaohu, Anhui Province, China. Journal of China University of Geosciences, 13(2): 98-106.
[14]	Tong, J.N., Zakharov, Y.D., 2004. Lower Triassic ammonoid zonation in Chaohu, Anhui Province, China. Albertiana, 31: 65-69.
[15]	Tong, J.N., Zakharov, Y.D., Orchard, M.J., et al., 2003. A candidate of the Induan-Olenekian boundary stratotype in the Tethyan region. Science in China(Series D), 46: 1182-1200.
[16]	Tong, J.N., Zakharov, Y.D., Wu, S.B., 2004. Early Triassic ammonoid succession in Chaohu, Anhui Province. Acta Palaeontologica Sinica, 43(2): 192-204(in English).
[17]	Tong, J.N., Zhao, L.S., Zuo, J.X., 2002. Recent studies on the Lower Triassic of Chaohu, Anhui Province, China. Albertiana, 27: 20-25.
[18]	Yin, H.F., Ding, M.H., Zhang, K.X., et al., 1995. Dongwuan-Indosinian ecostratigraphy of Yangtze platform and its margins. Science Press, Beijing(in Chinese).
[19]	Yin, H.F., Tong, J.N., 2002. Chinese marine Triassic stages and boundaries of Lower Triassic stages. Earth Science—Journal ofChina University ofGeosciences, 27(5): 490497(in Chinese with English abstract).
[20]	Zakharov, Y., 2004. The global stratigraphic section and point 2 (GSSP)of the base of the Olenekian stage(Lower Triassic). Albertiana, 29: 38-40.
[21]	陈祖烈, 1985. 安徽巢县早三叠世鱼龙化石. 中国区域地质, 15: 139-146. https://www.cnki.com.cn/Article/CJFDTOTAL-ZQYD198505016.htm
[22]	丁梅华, 1984. 安徽巢县马家山早三叠世牙形石及其地层意义. 地球科学——中国地质大学学报, 9(2): 37-48. https://www.cnki.com.cn/Article/CJFDTOTAL-DQKX198302004.htm
[23]	郭佩霞, 1982. 苏、皖早三叠世晚期菊石的发现. 古生物学报, 21(5): 560-567. https://www.cnki.com.cn/Article/CJFDTOTAL-GSWX198205007.htm
[24]	郭佩霞, 徐家聪, 1980. 对安徽巢县青龙群时代的认识. 地层学杂志, 4(4): 310-315. https://www.cnki.com.cn/Article/CJFDTOTAL-DCXZ198004008.htm
[25]	李金华, 1979. 安徽巢县三叠纪瓣鳃类化石新资料. 华东地质, (2): 96-103.
[26]	李金华, 1981. 安徽早三叠世瓣鳃类两新属. 古生物学报, 20(4): 325-330. https://www.cnki.com.cn/Article/CJFDTOTAL-GSWX198104004.htm
[27]	李尚武, 吴胜和, 1988. 安徽巢县中、下三叠统青龙群岩石特征及沉积环境分析. 见: 冯增昭. 下扬子地区中下三叠统青龙群岩相古地理研究. 昆明: 云南科技出版社, 82-92.
[28]	童金南, 1997. 安徽巢县下三叠统层序地层研究. 地球学报, 18(2): 215-219. https://www.cnki.com.cn/Article/CJFDTOTAL-DQXB702.012.htm
[29]	童金南, Zakharov, Y. D., 吴顺宝, 2004. 安徽巢湖地区早三叠世菊石序列. 古生物学报, 43(2): 192-204. doi: 10.3969/j.issn.0001-6616.2004.02.004
[30]	殷鸿福, 丁梅华, 张克信, 等, 1995. 扬子及其周缘东吴—印支期生态地层学. 北京: 科学出版社.
[31]	殷鸿福, 童金南, 2002. 关于中国的海相三叠系建阶及下三叠统分阶界线. 地球科学——中国地质大学学报, 27(5): 490-497. https://www.cnki.com.cn/Article/CJFDTOTAL-DQKX200205002.htm