杨文莉,仲钰天,辛浩,郑全锋,祁玉平,王玥,陈吉涛

• 1:中国科学院南京地质古生物研究所和生物演化与环境卓越创新中心现代古生物学和地层学国家重点实验室
• 2:中国科学院大学

摘要(Abstract)：

地史中海相碳酸盐岩记录的无机碳同位素的波动经常与全球气候事件相互关联,但碳酸盐岩的碳同位素不仅与全球碳循环相关,也受控于区域水循环和成岩作用。晚古生代大冰期在石炭纪末—早二叠世达到最高峰,南方冈瓦纳大陆高纬度地区冰川的进退引起低纬度地区旋回性的海平面变化,并发育显著的沉积间断,在华南表现为喀斯特岩溶角砾岩等。本文选取安徽巢湖凤凰山剖面,对宾夕法尼亚亚系—乌拉尔统18m厚的碳酸盐岩地层(黄龙组和船山组)进行了详细的沉积学与碳同位素对比研究,以探索碳同位素变化的控制因素。本文共识别出厚层灰泥灰岩、厚层粒泥灰岩、中至厚层泥粒灰岩、厚层泥球颗粒灰岩、薄层鲕粒颗粒灰岩、厚至巨厚层生物碎屑颗粒灰岩、厚层核形石颗粒灰岩、薄至中层灰砾岩和炉渣状灰岩等9种沉积岩相,指示了多次暴露的碳酸盐台地环境。这些暴露特征与同时期贵州罗甸斜坡相碳酸盐岩序列(约194 m)对比,表明凤凰山剖面存在严重的地层缺失。揭示了研究层段11 m和14 m附近的碳同位素两次显著负漂(幅度约为6‰和7‰)与古喀斯特层对应,是由碳酸盐台地暴露引起的区域成岩改造导致的,而非源于引起气候变化的全球碳循环波动。因此,地层学、沉积学和地球化学等多学科综合交叉研究是深入揭示古气候和古海洋变化规律的重要前提。

关键词(KeyWords)： 沉积相;碳同位素;晚古生代大冰期;石炭系;二叠系;古喀斯特

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(42072035);; 中国科学院战略性先导科技专项(XDB26000000、XDB18000000);; 现代古生物学和地层学国家重点实验室共同资助

作者(Author): 杨文莉,仲钰天,辛浩,郑全锋,祁玉平,王玥,陈吉涛

DOI: 10.19839/j.cnki.dcxzz.2021.0008

参考文献(References)：

• 安徽省地质矿产局.1987.安徽省区域地质志.北京:地质出版社.
• 侯明金,齐敦伦,金义祥.1998.安徽巢湖凤凰山石炭纪岩石特征及沉积环境分析.安徽地质,8(3):32-39.
• 李世毅,姜迪,赵莹莹,胡修棉,史宇坤.2015.安徽巢湖地区石炭纪-早二叠世碳酸盐岩微相与沉积环境.沉积与特提斯地质,35(1):3-15.
• 林春明,黄志诚,刘家润,凌洪飞,张顺,赵彦彦.2002.安徽巢湖凤凰山剖面石炭系微相和层序地层特征.岩石学报,18(3):424-433.
• 严雅娟,颜佳新,武思琴.2015.黔南地区早二叠世大幅度冰川性海平面下降的沉积学新证据.地球科学,40(2):372-380.
• Batt L S,Monta?ez I P,Isaacson P,Pope M C,Butts S H,Abplanalp J.2007.Multi-carbonate component reconstruction of mid-carboniferous (Chesterian) seawaterδ13C.Palaeogeography,Palaeoclimatology,Palaeoecology,256(3-4):298-318.
• Buggisch W,Wang X,Alekseev A S,Joachimski M M.2011.Carboniferous-Permian carbon isotope stratigraphy of successions from China(Yangtze platform),USA (Kansas) and Russia (Moscow Basin and Urals).Palaeogeography,Palaeoclimatology,Palaeoecology,301(1-4):18-38.
• Chen J,Monta?ez I P,Qi Y,Shen S,Wang X.2018 Strontium and carbon isotopic evidence for decoupling of p CO2 from continental weathering at the apex of the late Paleozoic glaciation.Geology,46(5):395-398.
• Chen J,Monta?ez I P,Qi Y,Wang X,Wang Q,Lin W.2016.Coupled sedimentary andδ13C records of late Mississippian platform-to-slope successions from South China:Insight intoδ13C chemostratigraphy.Palaeogeography,Palaeoclimatology,Palaeoecology,448:162-178.
• Fielding C R,Frank T D,Isbell J L.2008.The late Paleozoic ice age-Areview of current understanding and synthesis of global climate patterns.Special Paper of the Geological Society of America,441(1):343-354.
• Fielding C R,Frank T D,Birgenheier L P,Rygel M C,Jones A T,Roberts J.2008.Stratigraphic imprint of the Late Palaeozoic Ice Age in eastern Australia:a record of alternating glacial and nonglacial climate regime.Journal of the Geological Society,165(1):129-140.
• Flügel E.2010.Microfacies of Carbonate Rocks (second ed).Berlin:Springer.
• Ghafur A A.2015.Integrated depositional model of the Carbonate Kirkuk Group of southern Kurdistan-Iraq.Journal of Natural Sciences Research,5(24):79-106.
• Groves Jr F,Read J F.1978.Fenestral and associated vadose diagenetic middle Ordovician New Market Limestone,southwestern Virginia.Journal of Sedimenttary Petrology,48(2):453-473.
• Holmden C,Creaser R A,Muehlenbachs K,Leslie S A,Bergstr?m S M.1998.Isotopic evidence for geochemical decoupling between ancient epeiric seas and bordering oceans:Implications for secular curves.Geology,26:567-570.
• Huang X,Aretz M,Zhang X,Du Y,Qie W,Wen Q.2018.Pennsylvanian-early Permian palaeokarst development on the Yangtze Platform,South China,and implications for the regional sea‐level history.Geological Journal,53(4):1241-1262.
• Isbell J L,Henry L C,Gulbranson E L,Limarino C O,Fraiser M L,Koch Z J,Ciccioli P L,Dineen A A.2012.Glacial paradoxes during the late Paleozoic ice age:Evaluating the equilibrium line altitude as a control on glaciation.Gondwana Research,22(1):1-19.
• Knauth L P,Kennedy M J.2009.The Late Precambrian greening of the Earth.Nature,460(7256):728.
• Koch J T,Frank T D.2011.The Pennsylvanian-Permian transition in the low-latitude carbonate record and the onset of major Gondwanan glaciation.Palaeogeography,Palaeoclimatology,Palaeoecology,308(3-4):362-372.
• Liu C,Jarochowska E,Du Y,Vachard D,Munnecke A.2017.Stratigraphical andδ13C records of Permo-Carboniferous platform carbonates,South China:Responses to late Paleozoic icehouse climate and icehouse-greenhouse transition.Palaeogeography,Palaeoclimatology,Palaeoecology,474,113-129.
• Lohmann K C.1982.“Inverted J”carbon and oxygen isotopic trends:a criterion for shallow meteoric phreatic diagenesis (abstract).Geological Society of America,Abstracts with Program,14:548.
• Lohmann K C.1988.Geochemical patterns of meteoric diagenetic systems and their application to studies of paleokarst//James N P,Choquette P W (eds.).Paleokarst.New York:Springer-Verlag,58-80.
• Monta?ez I P,Poulsen C J.2013.The Late Paleozoic ice age:An evolving paradigm.Annual Review of Earth and Planetary Sciences,41:629-656.
• Patterson W P,Walter L M.1994.Depletion of 13C in seawaterΣCO2 on modern carbonate platforms:Significance for the carbon isotopic record of carbonates.Geology,22(10):885-888.
• Pratt B R,Raviolo M M,Bordonaro O L.2012.Carbonate platform dominated by peloidal sands:Lower Ordovician La Silla Formation of the eastern Precordillera,San Juan,Argentina.Sedimentology,59(3):843-866.
• Qie W,Zhang X,Du Y,Zhang Y.2011.Lower Carboniferous carbon isotope stratigraphy in South China:Implications for the Late Paleozoic glaciation.Science China:Earth Sciences,54:84-92.
• Ryu I C,Doh S J,Choi S G.2002.Carbonate breccias in the Lower-Middle Ordovician Maggol Limestone (Taebacksan Basin,South Korea):Implications for regional tectonism.Facies,46(1):35-56.
• Sheng Q,Wang X,Brenckle P,Huber B T.2018.Serpukhovian (Mississippian) foraminiferal zones from the Fenghuangshan section,Anhui Province,South China:Implications for biostratigraphic correlations.Geological Journal,53:45-57.
• Shi G,Chen Z.2006.Lower Permian oncolites from South China:Implications for equatorial sea-level responses to Late Palaeozoic Gondwanan glaciation.Journal of Asian Earth Sciences,26(3-4):424-436.
• Skompski S,Szulczewski M.1994.Tide-dominated Middle Devonian sequence from the northern part of the Holy Cross Mountains (Central Poland).Facies,30(1):247-265.
• Swart P K.2008.Global synchronous changes in the carbon isotopic composition of carbonate sediments unrelated to changes in the global carbon cycle.Proceedings of the National Academy of ences of the United States of America,105(37):13741-13745.
• Swart P K.2015.The geochemistry of carbonate diagenesis:The past,present and future.Sedimentology,62(5):1233-1304.
• Swart P K,Eberli G.2005.The nature of theδ13C of periplatform sediments:Implications for stratigraphy and the global carbon cycle.Sedimentary Geology,175(1):115-129.
• Ueno K,Hayakawa N,Nakazawa T,Wang Y,Wang X.2013.Pennsylvanian-Early Permian cyclothemic succession on the Yangtze Carbonate Platform,South China.Geological Society,London,Special Publications,376:235-267.
• Wang Y,Jin Y.2000.Permian palaeogeographic evolution of the Jiangnan Basin,South China.Palaeogeography,Palaeoclimatology,Palaeoecology,160(1-2):35-44.
• Yao L,Aretz M,Li Y,Wang X.2016.Gigantoproductid brachiopod storm shell beds in the Mississippian of South China:Implications for their paleoenvironmental and paleogeographical significances.Geologica Belgica,19(1-2):57-67.
• Zhao M,Zheng Y.2014.Marine carbonate records of terrigenous input into Paleotethyan seawater:Geochemical constraints from Carboniferous limestones.Geochimica et Cosmochimica Acta,141:508-531.
• Zheng Y,Xiao W,Zhao G.2013.Introduction to tectonics of China.Gondwana Research,23(4):1189-1206.
• Zhu X,Jin Z,Liang T,Yi S,Wei K,Gao B,Shi L.2020.Depositional environment,diagenetic evolution,and their impact on the reservoir quality of the carboniferous KT-Ⅱcarbonate in the zhanazhol reservoir,Pre-Caspian Basin,Kazakhstan.Marine and Petroleum Geology,117:104411.