Conodont Biostratigraphy and a Negative Excursion in Carbonate Carbon Isotopes across the Wuchiapingian-Changhsingian Boundary at the Dawoling Section, Hunan Province
-
摘要: 吴家坪阶-长兴阶界线位于这两次生物大灭绝事件之间，科学界对该界线附近是否发生重大地质事件仍然知之甚少，有关该时期的环境变化、碳循环的研究也不深入.嘉禾大窝岭剖面牙形石生物地层以及碳同位素变化的研究，为进一步探讨吴家坪期-长兴期附近的生物及环境事件提供基础材料.晚二叠世时以深水盆地相沉积为主的大窝岭剖面位于湖南省嘉禾县袁家镇附近.该剖面大隆组出露较好，岩性主要为硅质岩、硅质灰岩、灰岩以及泥岩.在大隆组中共识别出牙形石1属3种(含一个未定种)：Clarkina wangi，C. deflecta，C. sp.，并识别出牙形石C. wangi带和C. changxingensis-C. deflecta组合带.根据C. wangi的首现，将大窝岭剖面的吴家坪阶-长兴阶界线(Wuchiapingian-Changhsingian boundary，简称WCB)置于第11层底部.该剖面全岩无机碳同位素数据显示在13~15层发生了一次快速的负偏，从2.18‰负偏到-1.39‰，负偏值近3.50‰，可与浙江煤山及四川上寺等剖面进行很好的对比，揭示这次碳同位素负偏在华南区域上可具对比性.
-
关键词:
- 吴家坪阶-长兴阶界线 /
- 牙形石 /
- 碳同位素 /
- 大窝岭剖面 /
- 地层学
Abstract: The research of conodont biostratigraphy and carbon isotope change at the Dawoling section provides basic materials for the exploration of creatures and environment change in the Wuchiapingian-Changhsigian period. The Dawoling section at Yuanjia Town, Jiahe county, Hunan Province, recorded basinal deposition during the Late Permian. The Talung Formation is well-exposed and displays siliceous rock, siliceous limestone, limestone and claystone. Three conodont taxa (one is undetermined) of genus Clarkina: C. wangi, C. deflecta and C. sp. are identified, and these enable the tentative assignment of a C. wangi Zone overlain by a C. changxingensis-C. deflecta assemblage Zone. The Wuchiapingian-Changhsingian boundary (Wuchiapingian-Changhsingian boundary, WCB) is placed at the first occurrence (FO) of C. wangi at the base of bed 11 at this Dawoling section. A rapid negative shift from 2.18‰ to -1.39‰ in carbonate carbon isotope in beds 13-15 correlates well with the Changhsingian GSSP(Global Stratotype Section and Point) section at Meishan in Zhejiang and the Shangsi section of Sichuan. Therefore, this negative excursion could be a regionally correlation horizon in south China.-
Key words:
- Wuchiapingian-Changhsingian boundary /
- conodont /
- carbon isotope /
- Dawoling section /
- stratigraphy
-
图 1 湖南嘉禾大窝岭剖面交通位置
Fig. 1. The location of the Dawoling section, Jiahe county, Hunan Province
图 2 湖南嘉禾大窝岭剖面区域地质
Fig. 2. Regional geology of the Dawoling section, Jiahe county, Hunan Province
图 3 大窝岭剖面产出的牙形石
1~8, 10~11.Clarkina wangi(Zhang)；1.HDC14_001，HDC-14；2.HDC14_002，HDC-14；3.HDC14_004，HDC-14；4.HDC14_009，HDC-14；5.HDC19_002，HDC-19；6.HDC22_003，HDC-22；7.HDC22_004，HDC-22；8.HDC22_006，HDC-22；9.Clarkina deflecta(Wang & Wang)；HDC22_010，HDC-22.12~13.Clarkina sp.；10.HDC22_013，HDC-22；11.HDC22_024，HDC-22；12.HDC27_012，HDC-27；13.HDC28-9_010，HDC-28.牙形石均为P1分子，口视
Fig. 3. Conodonts from the Dawoling section
图 4 大窝岭剖面产出的菊石与双壳化石
1.Hunanopeten sp.，HDC-13；2~4.Xenaspis carbonaricus，HDC-13；5~6.Xenaspis sp.，HDC-13；7.Pseudotirolites? sp.，HDC-13；8.Sinoceltites sp.，HDC-3.除8比例尺为2.5 cm，其余均为5 mm
Fig. 4. Ammonoids and bivalve from the Dawoling section
图 5 湖南嘉禾大窝岭剖面δ13C-δ18O散点分布
Fig. 5. Crossplots showing the relationship between δ13C and δ18O from the Dawoling section, Jiahe county, Hunan Province
图 7 华南大窝岭剖面和煤山剖面吴家坪阶-长兴阶界线牙形石分布以及无机碳同位素变化对比
a.湖南大窝岭剖面；b.浙江煤山剖面，引自Shen et al.(2013)，阴影部分表示两剖面C. wangi首现面之上碳同位素负偏的对比，虚线表示吴家坪阶-长兴阶界线
Fig. 7. Conodont distribution and carbonate carbon isotope values across the Wuchiapingian-Changhsingian boundary at the Dawoling and Meishan sections, South China
图 6 吴家坪阶-长兴阶界线牙形石带对比
Fig. 6. Correlation of conodont zonations across the Wuchiapingian-Changhsingian boundary
表 1 剖面描述
Table 1. Description of profiles
层号 描述 上部覆盖 28 灰褐色-灰黑色灰岩与泥岩互层，可识别出15个旋回，每个旋回底部为灰岩，顶部为泥岩，产牙形石C. sp.，厚435 cm 27 灰褐色硅质泥岩(距顶部40cm处有8cm厚的灰岩)，产牙形石C. sp.，厚220 cm 26 灰黑色薄层灰岩夹泥岩(顶底为灰岩，中间夹两层泥岩)，厚80 cm 25 黄褐色薄层泥岩，厚30 cm 24 灰褐色-灰黑色硅质泥岩与灰黑色薄层灰岩互层，厚320 cm 23 灰黑色硅质岩(顶部有硅质灰岩)，厚40 cm 22 灰黑色灰岩，产牙形石C. sp.，C. wangi，C. deflecta(图 3)，厚9 cm 21 灰黑色硅质岩，厚11 cm 20 灰白色粘土岩，厚6 cm 19 灰黑色硅质岩夹硅质灰岩，产牙形石C. sp.，C. wangi，厚21 cm 18 黄褐色泥岩，厚5 cm 17 灰黑色硅质岩夹硅质灰岩，厚14 cm 16 黄褐色泥岩，厚6 cm 15 灰黑色硅质岩，厚8 cm 14 灰黑色灰岩，产牙形石C. sp., C. wangi，厚8 cm 13 灰黑色硅质岩夹硅质灰岩，产牙形石C. wangi，双壳Hunanopeten sp.和菊石Xenaspis carbonaricus，Xenaspis sp.，Pseudotirolites sp.(图 4)，厚20 cm 12 灰白色粘土岩，厚7 cm 11 灰黑色硅质岩夹硅质灰岩，含牙形石C. sp.，C. wangi，厚60 cm 10 灰黑色灰岩，厚15 cm 9 灰黑色硅质岩夹硅质灰岩，厚19 cm 8 灰白色粘土岩，厚5 cm 7 灰黑色硅质岩夹硅质灰岩，厚24 cm 6 灰黄色-黄色泥岩，厚3 cm 5 灰黑色硅质岩夹硅质灰岩，厚44 cm 4 黄褐色泥岩，厚33 cm 3 灰黑色硅质岩夹硅质灰岩，产菊石Sinoceltites sp.(图 4)，厚34 cm 2 灰褐色泥岩，厚10 cm 1 灰黑色硅质岩，厚11 cm 下部覆盖 
下载: 导出CSV
表 2 湖南嘉禾大窝岭剖面无机碳同位素(δ13Ccarb)以及氧同位素(δ18O)分析结果
Table 2. The δ13Ccarb and δ18O value of samples from the Daowoling section, Jiahe county, Hunan Province
样品编号 δ13Ccarb(‰) δ18O(‰) DWL-01 1.92 -7.97 DWL-02 1.46 -8.11 DWL-03 1.55 -7.86 DWL-04 1.29 -7.88 DWL-05 0.24 -8.94 DWL-06 1.75 -8.06 DWL-07 1.48 -7.99 DWL-08 1.45 -7.96 DWL-09 0.23 -7.04 DWL-10 1.26 -7.57 DWL-11 0.71 -7.03 DWL-12 0.55 -6.03 DWL-13 0.71 -5.24 DWL-14 2.30 -7.62 DWL-15 1.66 -6.34 DWL-16 2.18 -7.86 DWL-17 0.40 -4.35 DWL-18 0.32 -5.26 DWL-19 0.47 -6.31 DWL-20 -1.39 -5.73 DWL-21 1.02 -6.77 DWL-22 -0.38 -6.86 DWL-23 2.02 -6.26 DWL-24 2.30 -8.01 DWL-25 1.28 -7.04 DWL-26 0.93 -8.03 DWL-27 2.35 -7.98 DWL-28 2.04 -7.07 DWL-29 2.11 -7.37 DWL-30 2.14 -7.74 DWL-31 2.50 -7.90 DWL-32 2.08 -6.99 DWL-33 2.42 -6.74 DWL-34 1.93 -7.20 DWL-35 2.01 -7.57 DWL-36 2.67 -6.16 DWL-37 2.49 -6.56 DWL-38 2.26 -5.75 DWL-39 1.59 -6.09 DWL-40 2.26 -6.76 DWL-41 2.59 -5.72 DWL-42 2.20 -6.15 DWL-43 2.62 -5.99 DWL-44 2.41 -5.15 DWL-45 2.73 -5.63 DWL-46 2.79 -5.92 DWL-47 2.31 -5.97 DWL-48 2.85 -5.35 DWL-49 2.53 -5.66
下载: 导出CSV
-
Bond, D.P.G., Wignall, P.B., Wang, W., et al., 2010.The Mid-Capitanian (Middle Permian) Mass Extinction and Carbon Isotope Record of South China.Palaeogeography Palaeoclimatology Palaeoecology, 292(1-2):282-294.doi: 10.1016/j.palaeo.2010.03.056 Cao, C.Q., Yang, Y.C., Shen, S.Z., et al., 2010.Pattern of Delta C-13(carb) and Implications for Geological Events During the Permian-Triassic Transition in South China.Geological Journal, 45(2-3):186-194.doi: 10.1002/gj.1220 Chen, Z.Q., Benton, M.J., 2012.The Timing and Pattern of Biotic Recovery Following the End-Permian Mass Extinction.Nature Geoscience, 5(6):375-383.doi: 10.1038/ngeo1475 Fang, Q., 2012.The Conodont and Biostratigraphy in Guadalupian and Lopingian Series in Northeast Sichuan(Dissertation).China University of Geosciences, Beijing(in Chinese with English abstract). Hansen, H.J., 2006.Stable Isotopes of Carbon from Basaltic Rocks and Their Possible Relation to Atmospheric Isotope Excursions.Lithos, 92(1):105-116.doi: 10.1016/j.lithos.2006.03.029 Henderson, C.M., Mei, S.L., Shen, S.Z., et al., 2008.Resolution of the Reported Upper Permian Conodont Occurrences from Northwestern Iran.Permophiles, (51):2-9. Jiang, H.S., Lai, X.L., Luo, G.M., et al., 2007.Restudy of Conodont Zonation and Evolution across the P/T Boundary at Meishan Section, Changxing, Zhejiang, China.Global and Planetary Change, 55(1-3):39-55.doi: 10.1016/j.gloplacha.2006.06.007 Jiang, H.S., Lai, X.L., Yan, C.B., et al., 2011.Revised Conodont Zonation and Conodont Evolution across the Permian-Triassic Boundary at the Shangsi Section, Guangyuan, Sichuan, South China.Global and Planetary Change, 77(3-4):103-115.doi: 10.1016/j.gloplacha.2011.04.003 Jin, Y.G., Wang, Y., Henderson, C.M., et al., 2006.The Global Boundary Stratotype Section and Point (GSSP) for the Base of Changhsingian Stage (Upper Permian).Episodes, 29(3):175-182. http://www.cqvip.com/Main/Detail.aspx?id=23176490 Jin, Y.G., Wang, Y., Henderdon, C.M., et al., 2007.The Global Stratotype Section and Point (GSSP) for the base of the Changhsingian Stage(Upper Permian).Journal of Stratigraphy, 31(2):101-109 (in Chinese with English abstract). http://en.cnki.com.cn/article_en/cjfdtotal-dcxz200702000.htm Korte, C., Kozur, H.W., 2010.Carbon-Isotope Stratigraphy across the Permian-Triassic Boundary:A Review.Journal of Asian Earth Sciences, 39(4):215-235.doi: 10.1016/j.jseaes.2010.01.005 Krull, E.S., Lehrmann, D.J., Druke, D., et al., 2004.Stable Carbon Isotope Stratigraphy across the Permian-Triassic Boundary in Shallow Marine Carbonate Platforms, Nanpanjiang Basin, South China.Palaeogeography Palaeoclimatology Palaeoecology, 204(3-4):297-315.doi: 10.1016/S0031-0182(03)00732-6 Liu, X.C., Wang, W., Shen, S.Z., et al., 2013.Late Guadalupian to Lopingian (Permian) Carbon and Strontium Isotopic Chemostratigraphy in the Abadeh Section, Central Iran.Gondwana Research, 24(1):222-232.doi: 10.1016/j.gr.2012.10.012 Mei, S.L., Henderson, C.M., 2001.Evolution of Permian Conodont Provincialism and Its Significance in Global Correlation and Paleoclimate Implication.Palaeogeography Palaeoclimatology Palaeoecology, 170(3-4):237-260.doi: 10.1016/S0031-0182(01)00258-9 Mei, S.L., Henderson, C.M., Cao, C.Q., 2004.Conodont Sample-Population Approach to Defining the Base of the Changhsingian Stage, Lopingian Series, Upper Permian.Geological Society London Special Publications, 230(1):105-121.doi: 10.1144/GSL.SP.2004.230.01.06 Mutwakil, N., Xia, W.C., Zhang, N., 2006.Late Permian (Changhsingian) Conodont Biozonation and the Basal Boundary, Ganxi Section, Western Hubei Province, South China.Canadian Journal of Earth Sciences, 43(2):121-133.doi: 10.1139/e05-097 Qiao, P.J., Zhu, W., Shao, L., et al., 2015.Carbonate Stable Isotope Stratigraphy of Well Xike-1, Xisha Islands.Earth Science, 40(4):725-732(in Chinese with English abstract). http://www.en.cnki.com.cn/Article_en/CJFDTotal-DQKX201504014.htm Shao, L.Y., Zhang, P.F., Dou, J.W., et al., 2000.Carbon Isotope Compositions of the Late Permian Carbonate Rocks in Southern China:Their Variations between the Wujiaping and Changxing Formations.Palaeogeography Palaeoclimatology Palaeoecology, 161(1-2):179-192.doi: 10.1016/S0031-0182(00)00122-X Shen, S.Z., Mei, S.L., 2010.Lopingian (Late Permian) High-Resolution Conodont Biostratigraphy in Iran with Comparison to South China Zonation.Geological Journal, 45(2-3):135-161.doi: 10.1002/gj.1231 Shen, S.Z., Crowley, J.L., Wang, Y., et al., 2011.Calibrating the End-Permian Mass Extinction.Science, 334(6061):1367-1372.doi: 10.1126/science.1213454 Shen, S.Z., Cao, C.Q., Zhang, H., et al., 2013.High-Resolution δ13Ccarb Chemostratigraphy from Latest Guadalupian through Earliest Triassic in South China and Iran.Earth and Planetary Science Letters, 375:(156-165).doi: 10.1016/j.epsl.2013.05.020 Song, H.J., Wignall, P.B., Tong, J.N., et al., 2012.Geochemical Evidence from Bio-Apatite for Multiple Oceanic Anoxic Events during Permian-Triassic Transition and the Link with End-Permian Extinction and Recovery.Earth and Planetary Science Letters, 353-354:12-21.doi: 10.1016/j.epsl.2012.07.005 Wang, G.Q., Xia, W.C., Zhang, N., et al., 2007.Reviewing Upper Wuchiapingian-Changhsingian Conodont Biozones and Vertical Changes of Biomicrofacies, Delta C-13(carb) and Delta O-18 Isotopes at Xiakou Section, Western Hubei Province, South China.Journal of China University of Geosciences, 18:434-436. https://www.researchgate.net/publication/296109680_Reviewing_upper_Wuchiapingian-Changhsingian_conodont_biozones_and_vertical_changes_of_biomicrofacies_delta_C-13carb_and_delta_O-18_isotopes_at_Xiakou_section_western_Hubei_province_South_China?ev=auth_pub Wang, Y., Jin, Y.G., 2000.Permian Palaeogeographic Evolution of the Jiangnan Basin, South China.Palaeogeography Palaeoclimatology Palaeoecology, 160(1-2):35-44.doi: 10.1016/S0031-0182(00)00043-2 Wang, Y., Shen, S.Z., Cao, C.Q., et al., 2006.The Wuchiapingian-Changhsingian Boundary (Upper Permian) at Meishan of Changxing County, South China.Journal of Asian Earth Sciences, 26(6):575-583.doi: 10.1016/j.jseaes.2004.12.003 Wang, Y., Sadler, P.M., Shen, S.Z., et al., 2014.Quantifying the Process and Abruptness of the End-Permian Mass Extinction.Paleobiology, 40(1):113-129.doi: 10.1666/13022 Wei, H.Y., Yu, H., Wang, J.G., et al., 2015.Carbon Isotopic Shift and Its Cause at the Wuchiapingian-Changhsingian Boundary in the Upper Permian at the Zhaojiaba Section, South China:Evidences from Multiple Geochemical Proxies.Journal of Asian Earth Sciences, 105(1):270-285.doi:10.1016/j.jseaes.2015.01.011" target="_blank">http://dx.doi.org/ 10.1016/j.jseaes.2015.01.011 Wignall, P.B., Sun, Y.D., Bond, D.P., et al., 2009.Volcanism, Mass Extinction, and Carbon Isotope Fluctuations in the Middle Permian of China.Science, 324(5931):1179-1182.doi: 10.1126/science.1171956 Yuan, D.X., Shen, S.Z., Henderson, C.M., et al., 2014.Revised Conodont-Based Integrated High-Resolution Timescale for the Changhsingian Stage and End-Permian Extinction Interval at the Meishan Sections, South China.Lithos, 204:220-245.doi: 10.1016/j.lithos.2014.03.026 Yuan, J.L., Jiang, H.S., Wang D.C., 2015.LST—A New Inorganic Heavy Liquid Used in Conodont Separation.Geological Science and Technology Information, 34(5):225-230(in Chinese with English abstract). https://www.researchgate.net/publication/309457961_LST-a_new_inorganic_heavy_liquid_used_in_conodont_separation Zhang, K.X., Lai, X.L., Tong, J.N., et al., 2009.Progresses on Study of Conodont Sequence for the GSSP Section at Meishan, Changxing, Zhejiang, South China.Acta Palaeontologica Sinica, 48(3):474-486 (in Chinese with English abstract). http://en.cnki.com.cn/Article_en/CJFDTOTAL-GSWX200903017.htm Zhang, Y.X., 1981.Late Permian Bivalves from Yuanjia of Jiahe, Huan Province.Acta Palaeontologica Sinica, 20(3):10 (in Chinese with English abstract). http://en.cnki.com.cn/Article_en/CJFDTOTAL-GSWX198103010.htm Zhang, Z.P., He, X.L., Zhu, M.L., et al., 1993.The Assemblage Characters of the Upper Permian Brachiopod in the Chen County-Jiahe Area, Southern Hunan Province.Journal of China University of Mining & Technology, 22(3):39-49 (in Chinese with English abstract). http://en.cnki.com.cn/Article_en/CJFDTOTAL-ZGKD199303004.htm 房强, 2012. 川东北瓜德鲁普统与乐平统牙形石(刺)动物群及其生物地层研究(硕士学位论文). 北京: 中国地质大学. http://cdmd.cnki.com.cn/article/cdmd-11415-1012364944.htm 金玉玕, 王玥, Henderson, C.M., 等, 2007.二叠系长兴阶全球界线层型剖面和点位.地层学杂志, 31(2):101-109. http://www.cnki.com.cn/Article/CJFDTOTAL-DCXZ200702000.htm 乔培军, 朱伟林, 邵磊, 等, 2015.西沙群岛西科1井碳酸盐岩稳定同位素地层学.地球科学, 40(4):725-732. http://earth-science.net/WebPage/Article.aspx?id=3068 苑金玲, 江海水, 王达成, 2015.新型无机重液LST在牙形石分离中的使用.地质科技情报, 34(5):225-230. http://www.cnki.com.cn/Article/CJFDTOTAL-DZKQ201505035.htm 张克信, 赖旭龙, 童金南, 等, 2009.全球界线层型华南浙江长兴煤山剖面牙形石序列研究进展.古生物学报, 48(3):474-486. http://www.cnki.com.cn/Article/CJFDTOTAL-GSWX200903017.htm 张毓秀, 1981.湖南嘉禾袁家晚二叠世瓣鳃类.古生物学报, 20(3):10. http://www.cnki.com.cn/Article/CJFDTOTAL-GSWX198103010.htm 张志沛, 何锡麟, 朱梅丽, 等, 1993.湖南郴县-嘉禾地区晚二叠世腕足动物组合特征.中国矿业大学学报, 22(3):39-49. http://www.cnki.com.cn/Article/CJFDTOTAL-ZGKD199303004.htm -
点击查看大图
图(7) / 表(2)
计量
- 文章访问数: 5974
- HTML全文浏览量: 2256
- PDF下载量: 27
- 被引次数: 0
