Carbon-Isotope Excursions Recorded in the Cambrian System, South China: Implications for Mass Extinctions and Sea-Level Fluctuations

Abstract

Cambrian carbonates with abundant fossils of agnostoid trilobites deposited on the southern slope (Jiangnan slope belt) of the Yangtze Platform and in the Jiangnan deepwater basin are well exposed in the Wangcun Section of western Hunan, South China, and in the Duibian A Section of western Zhejiang, southeastern China, respectively. To better understand the response of carbon-isotope excursions to depositional environment changes, mass extinctions and eustatic events, we collected 530 carbonate samples in fresh roadcut exposures of the two measured sections for analysis of carbon and oxygen isotopic compositions. Data of δ¹³C from the Wangcun Section, western Hunan, South China, demonstrate that the Cambrian carbon-isotope profile includes three remarkable positive excursions CPE _wc-1, 2, 3 in the Upper Series 2, in the Lower and in the Middle Furongian Series. Three distinctive negative excursions CNE _wc-1, 2, 3 were separately tested in the Lower Terreneuvian Series, Lower Series 3 and in the Upper Furongian Series. Similarly, in the corresponding horizons in the Duibian A Section, Zhejiang Province, southeastern China, three positive excursions CPE _db-1, 2, 3 and three negative excursions CNE _db-1, 2, 3 also have been discovered. We interpret these significant carbon-isotope excursions as being associated with enhanced biogenic productivity, mass extinctions and eustatic events.

Keywords

carbon-isotope excursion / mass extinction / sea-level change / Cambrian / South China

References

[1] Álvaro J. J., Vennin E. Stratigraphic Signature of a Terminal Early Cambrian Regressive Event in the Iberian Peninsula. Canadian Journal of Earth Sciences, 1998, 35(4): 402-411.

[2] Babcock L. E., Peng S. C., Brett C. E., . Global Climate, Sea Level Cycles, and Biotic Events in the Cambrian Period. Palaeoworld, 2015, 24(1/2): 5-15.

[3] Babcock L. E., Robison R. A., Rees M. N., . The Global Boundary Stratotype Section and Point of the Drumian Stage (Cambrian) in the Drum Mountains, Utah, USA. Episodes, 2007, 30: 85-95.

[4] Bagnoli G., Peng S. C., Qi Y. P., . Conodonts from the Wa’ergang Section, China, a Potential GSSP for the Uppermost Stage of the Cambrian. Rivista Italiana di Paleontologia e Stratigrafia, 2017, 123(1): 1-10.

[5] Bagnoli G., Qi Y. P., Zuo J. X., . Integrated Biostratigraphy and Carbon Isotopes from the Cambrian Tangwangzhai Section, North China. Palaeoworld, 2014, 23(2): 112-124.

[6] Banner J. L., Hanson G. N. Calculation of Simultaneous Isotopic and Trace Element Variations during Water-Rock Interaction with Applications to Carbonate Diagenesis. Geochimica et Cosmochimica Acta, 1990, 54(11): 3123-3137.

[7] Brasier M. D., Corfield R. M., Derry L. A., . Multiple δ13C Excursions Spanning the Cambrian Explosion to the Botomian Crisis in Siberia. Geology, 1994, 22(5): 455-458.

[8] Brasier M. D., Magaritz M., Corfield R., . The Carbon-and Oxygen-Isotope Record of the Precambrian–Cambrian Boundary Interval in China and Iran and Their Correlation. Geological Magazine, 1990, 127 4 319

[9] Brasier M. D., Sukhov S. S. The Falling Amplitude of Carbon Isotopic Oscillations through the Lower to Middle Cambrian: Northern Siberia Data. Canadian Journal of Earth Sciences, 1998, 35(4): 353-373.

[10] Debrenne F. Extinction of the Archaeocyatha. Historical Biology, 1991, 5(2/3/4): 95-106.

[11] Derry L. A., Brasier M. D., Corfield R. M., . Sr and C Isotopes in Lower Cambrian Carbonates from the Siberian Craton: A Paleoenvironmental Record during the ‘Cambrian Explosion’. Earth and Planetary Science Letters, 1994, 128(3/4): 671-681.

[12] Derry L. A., Kaufman A. J., Jacobsen S. B. Sedimentary Cycling and Environmental Change in the Late Proterozoic: Evidence from Stable and Radiogenic Isotopes. Geochimica et Cosmochimica Acta, 1992, 56(3): 1317-1329.

[13] Dilliard K. A., Pope M. C., Coniglio M., . Stable Isotope Geochemistry of the Lower Cambrian Sekwi Formation, Northwest Territories, Canada: Implications for Ocean Chemistry and Secular Curve Generation. Palaeogeography, Palaeoclimatology, Palaeoecology, 2007, 256(3/4): 174-194.

[14] Ebneth S., Shields G. A., Veizer J., . High-Resolution Strontium Isotope Stratigraphy across the Cambrian-Ordovician Transition. Geochimica et Cosmochimica Acta, 2001, 65(14): 2273-2292.

[15] Feng Z. Z., Peng Y. M., Jin Z. K., . Lithofacies Palaeogeography of the Middle Cambrian. China Journal of Palaeogeography, 2002, 4(2): 1-11.

[16] Gaines R. R., Mering J. A., Zhao Y. L., . Stratigraphic and Microfacies Analysis of the Kaili Formation, a Candidate GSSP for the Cambrian Series 2–Series 3 Boundary. Palaeogeography, Palaeoclimatology. Palaeoecology, 2011, 311(3/4): 171-183.

[17] Glumac B. Influence of Early Lithification on Late Diagenesis of Microbialites: Insights from 18O Compositions of Upper Cambrian Carbonate Deposits from the Southern Appalachians. PALAIOS, 2001, 16(6): 593-600.

[18] Glumac B., Walker K. R. A Late Cambrian Positive Carbon-Isotope Excursion in the Southern Appalachians; Relation to Biostratigraphy, Sequence Stratigraphy, Environments of Deposition, and Diagenesis. Journal of Sedimentary Research, 1998, 68(6): 1212-1222.

[19] Glumac B., Mutti L. E. Late Cambrian (Steptoean) Sedimentation and Responses to Sea-Level Change along the Northeastern Laurentian Margin: Insights from Carbon Isotope Stratigraphy. Geological Society of America Bulletin, 2007, 119(5/6): 623-636.

[20] Glumac B., Spivak-Birndorf M. L. Stable Isotopes of Carbon as an Invaluable Stratigraphic Tool: An Example from the Cambrian of the Northern Appalachians, USA. Geology, 2002, 30(6): 563-566.

[21] Guo Q. J., Strauss H., Liu C. Q., . Carbon and Oxygen Isotopic Composition of Lower to Middle Cambrian Sediments at Taijiang, Guizhou Province, China. Geological Magazine, 2005, 142(6): 723-733.

[22] Guo Q. J., Strauss H., Liu C. Q., . Corrigendum to “A Negative Carbon Isotope Excursion Defines the Boundary from Cambrian Series 2 to Cambrian Series 3 on the Yangtze Platform, South China” [Palaeogeography, Palaeoclimatology, Palaeoecology, 285: 143–151]. Palaeogeography, Palaeoclimatology, Palaeoecology, 2010, 288 1/2/3/4 118

[23] Han S. C., Hu K., Cao J., . Origin of Early Cambrian Black-Shale-Hosted Barite Deposits in South China: Mineralogical and Geochemical Studies. Journal of Asian Earth Sciences, 2015, 106: 79-94.

[24] Han X. T., Bao Z. Y., Xie S. Y. Origin and Geochemical Characteristics of Dolomites in the Middle Permian Formation, SW Sichuan Basin, China. Earth Science, 2016, 41(1): 167-176.

[25] Jacobson S. B., Kaufman A. J. The Sr, C and O Isotopic Evolution of Neoproterozoic Seawater. Chemical Geology, 1999, 161(1/2/3): 37-57.

[26] Kaufman A. J., Jacobsen S. B., Knoll A. H. The Vendian Record of Sr and C Isotopic Variations in Seawater: Implications for Tectonics and Paleoclimate. Earth and Planetary Science Letters, 1993, 120(3/4): 409-430.

[27] Kouchinsky A., Bengtson S., Gallet Y., . The SPICE Carbon Isotope Excursion in Siberia: A Combined Study of the Upper Middle Cambrian–Lowermost Ordovician Kulyumbe River Section, Northwestern Siberian Platform. Geological Magazine, 2008, 145(5): 609-622.

[28] Kouchinsky A., Bengtson S., Missarzhevsky V. V., . Carbon Isotope Stratigraphy and the Problem of a Pre-Tommotian Stage in Siberia. Geological Magazine, 2001, 138(4): 387-396.

[29] Li S. H. L. S. P., Hu Y. Y., . Sequence Stratigraphy: Problems and Discussion. Earth Science, 2017, 42(12): 2312-2326.

[30] Lu Y. H., Lin H. L. Zonation of Cambrian Faunas in the western Zhejiang and Their Correlation with Those in North China, Australia and Sweden. US Department of the Interior, Geological Survey, Open-File Report, 1981, 81(743): 118-120.

[31] Lu Y. H., Lin H. L. Zonation and Correlation of Cambrian Faunas in W Zhejiang. Acta Geologica Sinica., 1983, 57(4): 317-328.

[32] Lu Y. H., Lin H. L. The Cambrian Trilobites of Western Zhejiang. Acta Palaeontologica Sinica., 1989, 57: 317-328.

[33] Maloof A. C., Schrag D. P., Crowley J. L., . An Expanded Record of Early Cambrian Carbon Cycling from the Anti-Atlas Margin, Morocco. Canadian Journal of Earth Sciences, 2005, 42(12): 2195-2216.

[34] Mei M. X., Ma Y. S., Zhang H., . From Basin Black Shales to Platform Carbonate Rocks: A Study on Sequence Stratigraphy for the Lower Cambrian of the Upper-Yangtze Region in South China. Acta Geologica Sinica: English Edition, 2007, 81(5): 739-755.

[35] Miller J. F., Ethington R. L., Evans K. R., . Proposed Stratotype for the Base of the Highest Cambrian Stage at the First Appearance Datum of Cordylodus Andresi, Lawson Cove Section, Utah, USA. Palaeoworld, 2006, 15(3/4): 384-405.

[36] Miller J. F., Evans K. R., Freeman R. L., . Proposed Stratotype for the Base of the Lawsonian Stage (Cambrian Stage 10) at the First Appearance Datum of Eoconodontus Notchpeakensis (Miller) in the House Range, Utah, USA. Bulletin of Geosciences, 2011, 86(3): 595-620.

[37] Miller J. F., Ripperdan R. L., Loch J. D., . Proposed GSSP for the Base of Cambrian Stage 10 at the Lowest Occurrence of Eoconodontus Notchpeakensis in the House Range, Utah, USA. Annales de Paléontologie, 2015, 101(3): 199-211.

[38] Montañez I. P., Osleger D. A., Banner J. L., . Evolution of the Sr and C Isotope Composition of Cambrian Oceans. GSA Today, 2000, 10: 1-7.

[39] Ng T. W., Yuan J. L., Lin J. P. The North China Steptoean Positive Carbon Isotope Event: New Insights towards Understanding a Global Phenomenon. Geobios, 2014, 47(6): 371-387.

[40] Peng S. C. Chronostratigraphic Subdivision of the Cambrian of China. Geologica Acta, 2003, 1(1): 135-144.

[41] Peng S. C., Babcock L. E., Zhu M. Y. Cambrian System of South China. Press of University of Science and Technology of China, 2001, 1-310.

[42] Peng S. C., Babcock L. E., Zhu X. J., . A Potential GSSP for the Base of the Uppermost Cambrian Stage, Coinciding with the First Appearance of Lotagnostus Americanusat Wa’ergang, Hunan, China. GFF, 2014, 136(1): 208-213.

[43] Peng S. C., Babcock L. E., Zuo J. X. The Global Standard Stratotype-Section and Point (GSSP) for the Base of the Jiangshanian Stage (Cambrian: Furongian) at Duibian, Jiangshan, Zhejiang, Southeast China. Episodes., 2012, 35(4): 462-477.

[44] Peng S. C., Babcock L. E., Zuo J. X., . The Global Boundary Stratotype Section and Point (GSSP) of the Guzhangian Stage (Cambrian) in the Wuling Mountains, Northwestern Hunan, China. Episodes, 2009, 32(1): 41-55.

[45] Peng S. C., Babcock L. E., Zuo J. X., . Proposed GSSP for the Base of Cambrian Stage 9, Coinciding with the First Appearance of Agnostotes Orientalis, at Duibian, Zhejiang, China. Science in China Series D: Earth Sciences, 2009, 52(4): 434-451.

[46] Peng S. C., Zhu X. J., Babcock L. E., . Potential Global Stratotype Sections and Points in China for Defining Cambrian Stages and Series. Geobios, 2004, 37(2): 253-258.

[47] Peng S. C., Zhu X. J., Zuo J. X., . Recently Ratified and Proposed Cambrian Global Standard Stratotype-Section and Points. Acta Geologica Sinica: English Edition, 2011, 85(2): 296-308.

[48] Peng, S. C., Zuo, J. X., Babcock, L. E., et al., 2005. Cambrian Section at Dadoushan near Duibian, Jiangshan, Western Zhejiang and Candidate Stratotype for the Base of an Unnamed Global Stage Defined by the FAD of Agnostotes orientalis. In: Peng, S. C., Babcock, L. R., Zhu, M. Y., eds., Cambrian System of China and Korea, Guide to Field Excursions. University of Science and Technology of China Press, Hefei. 210–227

[49] Peng Y., Peng Y. B., Lang X. G., . Marine Carbon-Sulfur Biogeochemical Cycles during the Steptoean Positive Carbon Isotope Excursion (SPICE) in the Jiangnan Basin, South China. Journal of Earth Science, 2016, 27(2): 242-254.

[50] Ripperdan R. L., Magaritz M., Nicoll R. S., . Simultaneous Changes in Carbon Isotopes, Sea Level, and Conodont Biozones within the Cambrian-Ordovician Boundary Interval at Black Mountain, Australia. Geology, 1992, 20 11 1039

[51] Ripperdan, R. L., Miller, J. F., 1995. Carbon-Isotope Ratios from the Cambrian–Ordovician Boundary Section at Lawson Cove, Ibex area, Utah. In: Cooper, J. D., Droser, M. L., Finney, S. C., eds., Ordovician Odyssey: Short Papers for the Seventh International Symposium on the Ordovician System. Pacific Section SEPM, Fullerton, California. 129–132

[52] Saltzman M. R., Cowan C. A., Runkel A. C., . The Late Cambrian Spice (13C) Event and the Sauk II-SAUK III Regression: New Evidence from Laurentian Basins in Utah, Iowa, and Newfoundland. Journal of Sedimentary Research, 2004, 74(3): 366-377.

[53] Saltzman M. R., Ripperdan R. L., Brasier M. D., . A Global Carbon Isotope Excursion (SPICE) during the Late Cambrian: Relation to Trilobite Extinctions, Organic-Matter Burial and Sea Level. Palaeogeography, Palaeoclimatology, Palaeoecology, 2000, 162(3/4): 211-223.

[54] Saltzman M. R., Runnegar B., Lohmann K. C. Carbon Isotope Stratigraphy of Upper Cambrian (Steptoean Stage) Sequences of the Eastern Great Basin: Record of a Global Oceanographic Event. Geological Society of America Bulletin, 1998, 110(3): 285-297.

[55] Sial A. N., Peralta S., Ferreira V. P., . Upper Cambrian Carbonate Sequences of the Argentine Precordillera and the Steptoean C-Isotope Positive Excursion (SPICE). Gondwana Research, 2008, 13(4): 437-452.

[56] Wang G. Z., Wang J. S., Wang Z., . Carbon Isotope Gradient of the Ediacaran Cap Carbonate in the Shennongjia Area and Its Implications for Ocean Stratification and Palaeogeography. Journal of Earth Science, 2017, 28(2): 187-195.

[57] Wang S. F., Zou C. N., Dong D. Z., . Multiple Controls on the Paleoenvironment of the Early Cambrian Marine Black Shales in the Sichuan Basin, SW China: Geochemical and Organic Carbon Isotopic Evidence. Marine and Petroleum Geology, 2015, 66: 660-672.

[58] Wotte T., Álvaro J. J., Shields G. A., . C-, O-And Sr-Isotope Stratigraphy across the Lower–Middle Cambrian Transition of the Cantabrian Zone (Spain) and the Montagne Noire (France), West Gondwana. Palaeogeography, Palaeoclimatology, Palaeoecology, 2007, 256(1/2): 47-70.

[59] Zhang J. P., Fan T. L., Algeo T. J., . Paleo-Marine Environments of the Early Cambrian Yangtze Platform. Palaeogeography, Palaeoclimatology, Palaeoecology, 2016, 443: 66-79.

[60] Zhang W. H., Shi X. Y., Jiang G. Q., . Mass-Occurrence of Oncoids at the Cambrian Series 2–Series 3 Transition: Implications for Microbial Resurgence Following an Early Cambrian Extinction. Gondwana Research, 2015, 28(1): 432-450.

[61] Zhao Y. L., Yuan J. L., Peng S. C., . A New Section of Kaili Formation (Cambrian) and a Biostratigraphic Study of the Boundary Interval across the Undefined Cambrian Series 2 and Series 3 at Jianshan, Jianhe County, China with a Discussion of Global Correlation Based on the First Appearance Datum of Oryctocephalus Indicus (Reed, 1910). Progress in Natural Science, 2008, 18(12): 1549-1556.

[62] Zhu M. Y., Babcock L. E., Peng S. C. Advances in Cambrian Stratigraphy and Paleontology: Integrating Correlation Techniques, Paleobiology, Taphonomy and Paleoenvironmental Reconstruction. Palaeoworld, 2006, 15(3/4): 217-222.

[63] Zhu M. Y., Zhang J. M., Li G. X., . Evolution of C Isotopes in the Cambrian of China: Implications for Cambrian Subdivision and Trilobite Mass Extinctions. Geobios, 2004, 37(2): 287-301.

[64] Zuo J. X., Peng S. C., Zhu X. J. Carbon-Isotope Composition of Cambrian Carbonate Rocks in Yangtze Platform, South China and Its Geological Implications. Geochimica, 2008, 37(2): 118-128.

[65] Zuo J. X., Peng S. C., Qi Y. P., . Evolution of Carbon Isotope Composition in Potential Global Stratotype Section and Point at Luoyixi, South China, for the Base of the Unnamed Global Seventh Stage of Cambrian System. Journal of China University of Geosciences, 2008, 19(1): 9-22.