Carbon and oxygen isotopes across Devonian and Carboniferous boundary in the Funing area of Yunnan Province and the response to sea-level changes
-
摘要:
右江盆地沉积连续的泥盆纪—石炭纪岩石地层，是中国泥盆纪与石炭纪之交Hangenberg生物大灭绝事件的重点研究区域。选取右江盆地西缘云南富宁地区晚泥盆世—早石炭世地层，在岩石地层学研究的基础上对碳酸盐岩进行系统的碳、氧同位素组成研究。富宁地区晚泥盆世—早石炭世地层存在不同幅度的δ13C、δ18O负向偏移，尤其在泥盆系—石炭系界线附近负偏移明显，δ13C、δ18O值偏移层位与层序地层学转换及古生物灭绝事件发生层位一致，反映了晚泥盆世法门期海平面下降和早石炭世的海侵事件。研究区泥盆系—石炭系界线附近δ13C值负偏趋势与右江盆地内δ13C值演化偏移相似，华南其他典型剖面δ13C值亦呈现不同幅度的负向偏移，泥盆纪与石炭纪之交的碳同位素演化序列与欧洲、北美地区δ13C值负向偏移反映的海平面下降事件一致，具全球性对比意义。
Abstract:Youjiang Basin in which continuous strata from Devonian to Carboniferous were deposited is the key area for the study of Hangenberg biological extinction event between Devonian and Carboniferous in China. The Upper Devonian to Lower Carboniferous strata of Funing area in the western margin of the Youjiang Basin were selected to systematically study carbon and oxygen isotopic compositions of carbonate rocks based on the litho-stratigraphic research. Negative shifts of δ13C and δ18O with different amplitudes exist in the Upper Devonian to Lower Carboniferous in the Funing area, especially near the Devonian-Carboniferous boundary. The layers in which δ13C and δ18O shifts are consistent with the sequence of stratigraphic transformation and paleontological extinction events, which reflected the decline of sea level during the Famennnian stage of the Late Devonian and the transgression events in the Early Carboniferous. The negative δ13C shift near the Devonian-Carboniferous boundary in the study area is similar to the evolutionary shift of δ13C values in Youjiang Basin. The δ13C values in other typical sections in South China all show negative shifts of different magnitudes. The evolutionary sequence of carbon isotopes near the Devonian-Carboniferous boundary is consistent with the sea-level decline events reflected by the offset of δ13C values in Europe and North America, which shows global correlation significance.
-
-
表 1 蒋家湾(小弄)剖面碳、氧同位素测试结果
Table 1. δ13CVPDB and δ18OVPDB values of Jiangjiawan(Xiaonong)section
统 组 样品编号 岩性 δ13CVPDB/‰ δ18OVPDB/‰ 古盐度Z 下石炭统 黄龙组 h-16 生物碎屑灰岩 4.96 -1.32 136.80 h-15 生物碎屑灰岩 5.00 -2.29 136.40 h-14 生物碎屑灰岩 4.73 -1.35 136.31 h-13 生物碎屑灰岩 4.76 -0.93 136.59 h-12 生物碎屑灰岩 4.85 0.82 137.64 h-11 生物碎屑灰岩 4.59 -1.61 135.90 h-10 生物碎屑灰岩 3.78 -1.27 134.41 h-9 生物碎屑灰岩 3.18 -1.11 133.26 h-8 生物碎屑灰岩 4.05 0.98 136.08 h-7 生物碎屑灰岩 4.00 0.37 135.68 h-6 生物碎屑灰岩 4.25 -0.03 135.99 h-5 生物碎屑灰岩 3.07 0.45 133.81 h-4 生物碎屑灰岩 3.80 0.02 135.09 h-3 生物碎屑灰岩 3.82 0.09 135.17 h-2 含生物碎屑微晶灰岩 1.14 -4.19 127.55 h-1 含生物碎屑微晶灰岩 0.68 -3.82 126.79 上泥盆统 革当组 g-8 微晶灰岩 1.70 -2.08 129.75 g-7 微泥晶灰岩 1.65 -3.04 129.17 g-6 含生物碎屑灰岩 1.75 -3.74 129.02 g-5 鲕粒灰岩 1.94 -3.24 129.66 g-4 生物碎屑灰岩 2.87 -3.19 131.59 g-3 鲕粒灰岩 3.05 -3.21 131.95 g-2 鲕粒灰岩 2.99 -2.94 131.96 g-1 鲕粒灰岩 2.73 -2.67 131.56 五指山组 w-7 微晶灰岩 3.30 -2.58 132.77 w-6 微晶灰岩 2.95 -2.92 131.89 w-5 微晶灰岩 2.19 -2.80 130.39 w-4 鲕粒灰岩 2.61 -3.16 131.07 w-3 微晶灰岩 1.58 -3.28 128.90 w-2 微晶灰岩 2.14 -2.68 130.35 w-1 泥微晶灰岩 3.05 -2.46 132.32 注：Z值据Keith等[25]公式：Z=2.048×(δ13C+50)+0.498×(δ18O+50) 
下载: 导出CSV
-
[1] 孙康, 胡永亮, 关成国, 等. 浙西邵家山埃迪卡拉纪地层的碳同位素特征及其地层对比意义[J]. 地层学杂志, 2020, 44(2): 136-149. https://www.cnki.com.cn/Article/CJFDTOTAL-DCXZ202002002.htm
[2] 刘安, 陈林, 陈孝红, 等. 湘中坳陷泥盆系碳氧同位素特征及其古环境意义[J]. 地球科学, 2021, 46(4): 1269-1281. https://www.cnki.com.cn/Article/CJFDTOTAL-DQKX202104008.htm
[3] Saltzman M R, Thomas M, E. Carbon isotope stratigraphy[C]//Gradstein F, Ogg J, Schmitz M, et al. The Geologic Time Scale 2012. Amsterdam: Elsevier, 2012: 207-232.
[4] Qie W, Liu J, Chen J, et al. Local overprints on the global carbonate δ13C signal in Devonian-Carboniferous boundary successions of South China[J]. Palaeogeography Palaeoclimatology Palaeoecology, 2015, 418: 290-303. doi: 10.1016/j.palaeo.2014.11.022
[5] 季强, 张振贤, 陈忠宣, 等. 广西鹿寨寨沙泥盆-石炭系界线研究[J]. 地层学杂志, 1987, 11(3): 213-217. https://www.cnki.com.cn/Article/CJFDTOTAL-DCXZ198703007.htm
[6] 李小军. 滇东南富宁地区晚泥盆世-早石炭世沉积特征及构造演化[D]. 昆明理工大学硕士学位论文, 2020.
[7] 俞昌明. 广西桂林南边村泥盆系-石炭系界线候选层型剖面的综合评价[J]. 地质学报, 1989, 68(2): 246-254. https://www.cnki.com.cn/Article/CJFDTOTAL-DZXE198903005.htm
[8] 龚兴宝, 黄汗铎, 黄炯明, 等. 广西桂林南边村剖面食盆-石炭系界线研究的新进展[J]. 中国岩溶, 1989, 8(1): 85-88. https://www.cnki.com.cn/Article/CJFDTOTAL-ZGYR198901016.htm
[9] 李镇梁. 桂林不同沉积相泥盆-石炭系界线[J]. 中国区域地质, 1992, 11(2): 97-110. https://www.cnki.com.cn/Article/CJFDTOTAL-ZQYD199202000.htm
[10] 陈洪德, 曾允孚. 右江盆地的性质及演化讨论[J]. 岩相古地理, 1990, 10(10): 28-37.
[11] 曾允孚, 刘文均, 陈洪德, 等. 华南右江复合盆地的沉积构造演化[J]. 地质学报, 1995, 69(2): 113-124. https://www.cnki.com.cn/Article/CJFDTOTAL-DZXE199502001.htm
[12] 周倩玉, 侯明才, 黄虎, 等. 右江盆地泥盆系硅质岩地球化学特征及地质意义[J]. 成都理工大学学报(自然科学版), 2019, 46(3): 280-289. doi: 10.3969/j.issn.1671-9727.2019.03.03
[13] 杨成富, 刘建中, 顾雪祥, 等. 南盘江-右江盆地构造演化与金锑成矿作用[J]. 地球学报, 2020, 41(2): 280-292. https://www.cnki.com.cn/Article/CJFDTOTAL-DQXB202002017.htm
[14] 吴浩若. 晚古生代-三叠纪南盘江海的构造古地理问题[J]. 古地理学报, 2003, 5(1): 63-76. doi: 10.3969/j.issn.1671-1505.2003.01.006
[15] 季强. 泥盆纪-石炭纪之交的牙形石类动物群演替与界线层型研究[C]//中国地质科学院地层古生物论文集编委会. 地层古生物论文集. 北京: 地质出版社, 2004, 28: 111-123.
[16] 白顺良, 王大锐, 杨家健. 碳稳定同位素在泥盆系-石炭系及弗拉阶-法门阶界线层远距离地层对比的应用[J]. 北京大学学报(自然科学版), 1990, 26(4): 497-505. https://www.cnki.com.cn/Article/CJFDTOTAL-BJDZ199004016.htm
[17] 王大锐, 白志强. 广西及邻区泥盆系碳酸盐岩碳、氧同位素组成特征及意义[J]. 北京大学学报(自然科学版), 1995, 31(4): 460-466. https://www.cnki.com.cn/Article/CJFDTOTAL-BJDZ504.012.htm
[18] 许冰, 顾照炎, 胡斌, 等. 广西上泥盆统F-F界线碳同位素的变化特征[J]. 沉积学报, 2004, 22(4): 603-608. doi: 10.3969/j.issn.1000-0550.2004.04.008
[19] 吴一超, 白志强, 常洁琼, 等. 广西桂林南边村剖面泥盆系-石炭系界线化学地层学[J]. 地质科技情报, 2014, 33(5): 86-92. https://www.cnki.com.cn/Article/CJFDTOTAL-DZKQ201405012.htm
[20] 黄虎. 右江盆地晚古生代中三叠世盆地演化-来自沉积岩和火山岩地球化学特征的证据[D]. 中国地质大学(武汉)博士学位论文, 2013.
[21] 杜远生, 黄宏伟, 黄志强, 等. 右江盆地晚古生代-三叠纪盆地转换及构造意义[J]. 地质科技情报, 2009, 28(6): 10-15. doi: 10.3969/j.issn.1000-7849.2009.06.002
[22] 杜远生, 黄虎, 杨江海, 等. 晚古生代-中三叠世右江盆地的格局和转换[J]. 地质论评, 2013, 59(1): 1-11. doi: 10.3969/j.issn.0371-5736.2013.01.001
[23] Buggisch W, Joachimski M M. Carbon isotope stratigraphy of the Devonian of Central and Southern Europe[J]. Palaeogeography Palaeoclimatology Palaeoecology, 2006, 240: 68-88. doi: 10.1016/j.palaeo.2006.03.046
[24] 郄文昆, 马学平, 徐洪河, 等. 中国泥盆纪综合地层和时间框架[J]. 中国科学: 地球科学, 2019, 49(1): 115-138. https://www.cnki.com.cn/Article/CJFDTOTAL-JDXK201901007.htm
[25] Keith M L, Weber J N. Carbon and oxygen isotopic composition of selected limestones and fossils[J]. Geochim Cosmochin Acta, 1964, 18: 1787-1816. http://www.sciencedirect.com/science/article/pii/0016703764900225
[26] Knauth L P, Kennedy M J. The late Precambrian greening of the Earth[J]. Nature, 2009, 460: 728-732. doi: 10.1038/nature08213
[27] Marshall J D. Climatic and oceanographic isotopic signals from the carbonate rock record and their preservation[J]. Geol. Mag., 1992, 129: 143-160. doi: 10.1017/S0016756800008244
[28] Kaufman S I, Knoll A H. Neoproterozonic variations in the C-isotopic composition of seawater: stratigraphic and biogeochemical implications[J]. Precambrian Res., 1995, 73: 27-49. doi: 10.1016/0301-9268(94)00070-8
[29] 李忠雄, 管士平. 扬子地台西缘宁蒗泸沽湖地区志留系沉积旋回及锶、碳、氧同位素特征[J]. 古地理学报, 2001, 3(4): 69-76. doi: 10.3969/j.issn.1671-1505.2001.04.008
[30] 沈渭洲, 黄耀生. 稳定同位素地质[M]. 北京: 原子能出版社, 1987: 162-164.
[31] Clayton R N, Degens E T. Use of carbon isotope analyses for differentiating fresh water and marine sediments[J]. AAPG Bulletin, 1959, 13(4): 890-897.
[32] Keith M L, Weber J N. Isotopic composition and environmental classification of selected limestone and fossils[J]. Geochim Cosmochim Acta, 1964, 28: 1786-1816. http://www.sciencedirect.com/science/article/pii/0016703764900225
[33] 张秀莲. 碳酸盐岩中碳、氧稳定同位素与古盐度、古水温的关系[J]. 沉积学报, 1985, 3(4): 18-30. https://www.cnki.com.cn/Article/CJFDTOTAL-CJXB198504001.htm
[34] 张能, 田启明, 谭建政, 等. 桂西右江盆地伸展构造特征[J]. 中国地质, 2016, 43(3): 953-968. https://www.cnki.com.cn/Article/CJFDTOTAL-DIZI201603018.htm
[35] 刘超, 陆刚, 张喜, 等. 桂西北天峨孤立碳酸盐岩台地晚古生代沉积特征与演化[J]. 地质论评, 2014, 60(1): 55-70. https://www.cnki.com.cn/Article/CJFDTOTAL-DZLP201401007.htm
[36] Qie W, Wang X D, Zhang X, et al. Latest Devonian to earliest Carboniferous conodont and carbon isotope stratigraphy of a shallow-water sequence in South China[J]. Geological Journal, 2016, 51: 915-935. http://onlinelibrary.wiley.com/doi/full/10.1002/gj.2710
[37] Buggisch W, Joachimski M M, Sevastopulo G, et al. Mississippian δ13Ccard and conodont apatite δ18O records-their relation to the Late Palaeozoic Glaciation[J]. Palaeogeography, Palaeoclimatology, Palaeoecology, 2008, 268: 273-292.
[38] Saltzman M R, Thomas E. Carbon Isotope Stratigraphy[C]//Gradstein F M, Ogg J G, Schmitz M D, et al. The Geologic Time Scale, Volume 1. Amsterdam: Elsevier, 2012: 207-232.
① 云南省地质调查院. 云南1: 5万睦伦街、富宁县、木卓、郎恒幅区域地质矿产调查报告. 2017.
-
图(4)
表(1)
计量
- 文章访问数: 1339
- PDF下载数: 11
- 施引文献: 0