Microfacies Analysis of Lower Aptian (Cretaceous) Shallow-water Carbonate in the Mt.Faito Section, Italy
SUN QingQing1,2, FAN TaiLiang1,2, Roberto Graziano3, WU Jun1,2
1. School of Energy Resources, China University of Geosciences(Beijing), Beijing 100083, China;
2. Key Laboratory of Marine Reservoir Evolution and Hydrocarbon Enrichment Mechanism, Ministry of Education, China University of Geosciences(Beijing), Beijing 100083, China;
3. Department of Earth, Environment and Resources Sciences, University of Naples FedericoⅡ, Naples 80138, Italy
Three distinct lithostratigraphic units A,B,and C have been recognized according to field work and thin section observations. The crudely stratified Unit A deposited in subtidal environments is characterized by monotonous wackstone intercalated with bioclastic wackstone-packstone. The well-bedded Unit B consists largely of bivalve float-stones in a matrix of bioclastic packstone deposited in subtidal conditions. Unit C,disconformably overlying Unit B, is composed of complex lithofacies associations that deposit in variable environments from subtidal to supratidal set-tings,sometimes in lagoon environments. According to the biota range chart and stable carbon isotope data from the Mt. Faito section,which can be used to analyze the biosedimentary diversity,different climatic and sea water condi-tions can be inferred as well. Unit A is characterized by a "Chlorozoan" association,which indicates warm and oligo-trophic conditions;Unit B is dominated by "Chlorozoan" and "Foramol" associations that indicate relatively warm and mesotrophic conditions;and Unit C is a combination of "Microbial" and "Foramol" associations,hence mesotro-phic and temperate thermal conditions. Therefore,local early Aptian biosedimentary shifts and paleoenvironmental turnovers exerted by the increasing temperature,CO2,and nutrient contents have been interpreted on a global scale by analyzing the biosedimentary evolvement and correlating the C-isotope curve with those of other early Cretaceous carbonate platforms and basins worldwide.
Flügel E. Microfacies of carbonate rocks:Analysis,interpretation and application[M]. 2nd ed. Heidelberg:Springer-Verlag, 2010:1-723.
[2]
Skelton P W,Spicer R A,Kelley S P,et al. The cretaceous world[M]. London:Cambridge University Press,2003:1-350.
[3]
Larson R L. Latest pulse of Earth:Evidence for a mid-Cretaceous superplume[J]. Geology,1991,19(6):547-550.
[4]
Jones C E,Jenkyns H C. Seawater strontium isotopes,oceanic anoxic events,and seafloor hydrothermal activity in the Jurassic and Cretaceous[J]. American Journal of Science, 2001,301(2):112-149.
[5]
Jenkyns H C. Oceanic Anoxic Events:30 Years on[C]//AGU Fall Meeting. AGU Fall Meeting Abstracts. San Francisco:AGU,2006.
[6]
Iannace A,Frijia G,Galluccio L,et al. Facies and early dolomitization in Upper Albian shallow-water carbonates of the southern Apennines (Italy):Paleotectonic and paleoclimatic implications[J]. Facies,2014,60(1):169-194.
[7]
Amodio S,Weissert H. Palaeoenvironment and palaeoecology before and at the onset of Oceanic Anoxic Event (OAE) 1a:Reconstructions from Central Tethyan archives[J]. Palaeogeography,Palaeoclimatology,Palaeoecology,2017,479:71-89.
[8]
Amodio S,Ferreri V,D'argenio B. Cyclostratigraphic and chronostratigraphic correlations in the Barremian-Aptian shallowmarine carbonates of the central-southern Apennines (Italy)[J]. Cretaceous Research,2013,44:132-156.
[9]
Graziano R,Raspini A. Long-and short-term hydroclimatic variabilities in the Aptian Tethys:Clues from the orbital chronostratigraphy of evaporite-rich beds in the Apennine carbonate platform (Mt. Faito,southern Italy)[J]. Palaeogeography, Palaeoclimatology,Palaeoecology,2015,418:319-343.
[10]
Graziano R,Raspini A,Bartiromo A. Late Aptian palaeoclimatic turnovers and volcanism:Insights from a shallow-marine and continental succession of the Apennine carbonate platform, southern Italy[J]. Sedimentary Geology,2016,339:188-217.
[11]
Ascione A,Ciarcia S,Donato V D,et al. The Pliocene-Quaternary wedge-top basins of southern Italy:an expression of propagating lateral slab tear beneath the Apennines[J]. Basin Research,2012,24(4):456-474.
[12]
Nicolai C,Gambini R. Structural architecture of the Adria platform-and-basin system[J]. Bollettino-Societa Geologica Italiana,2007,15(7):21-37.
[13]
D'Argenio B,Alvarez W. Stratigraphic evidence for crustal thickness changes on the southern Tethyan margin during the alpine cycle[J]. Geological Society of America Bulletin,1980, 91(12):681-689.
[14]
Dercourt J,Gaetani M,Vrielynck B,et al. Atlas peri-tethys, palaeogeographical maps[M]. Paris,France:Commission for the Geological Map of the World,2000:24.
[15]
Najarro M,Rosales I,Martín-Chivelet J. Major palaeoenvironmental perturbation in an Early Aptian carbonate platform:Prelude of the Oceanic Anoxic Event 1a?[J]. Sedimentary Geology,2011,235(1/2):50-71.
[16]
Carannante G,Simone L. Foramol carbonate shelves as depositional site and source area:Recent and ancient examples from the Mediterranean region[J]. International Journal of Obesity, 1988,30(7):124-125.
[17]
Graziano R,Carannante G,Simone L. The Inception and Evolution of the Late Cretaceous Rudist Bearing Carbonate Platforms in the Mediterranean Tethys:Mirror of Geodynamically Induced Biosphere-Geosphere Interactions[C]//Meeting of the European Geosciences Union. Geophysical Research Abstract. Vienna,2007,9.
[18]
Schlager W. Carbonate sedimentology and sequence stratigraphy[M]. Tulsa:Society for Sedimentary Geology,2005:13-38.
[19]
Lees A. Possible influence of salinity and temperature on modern shelf carbonate sedimentation[J]. Marine Geology,1975, 19(3):159-198.
[20]
Lees A,Buller A T. Modern temperate-water and warm-water shelf carbonate sediments contrasted[J]. Marine Geology, 1972,13(5):M67-M73.
[21]
苏旺,江青春,陈志勇,等. 冷水碳酸盐岩研究现状与展望[J]. 海相油气地质,2017,22(1):1-13.[Su Wang, Jiang Qingchun,Chen Zhiyong,et al. Cool-water carbonates:a review of the current status and prospects[J]. Marine Origin Petroleum Geology,2017,22(1):1-13.]
[22]
James N P. The cool-water carbonate depositional realm[M]//James N P, Clarke J A D. Cool-water carbonates. Tulsa:SEPM (Society for Sedimentary Geology) Special Publications,1997,56:1-20.
[23]
Naafs B D A,Pancost R D. Sea-surface temperature evolution across Aptian Oceanic Anoxic Event 1a[J]. Geology,2016, 44(11):959-962.
[24]
Branch T A,DeJoseph B M,Ray L J,et al. Impacts of ocean acidification on marine seafood[J]. Trends in Ecology & Evolution,2013,28(3):178-186.
[25]
Bonin A,Pucéat E,Vennin E,et al. Cool episode and platform demise in the Early Aptian:New insights on the links between climate and carbonate production[J]. Paleoceanography,2016,31(1):66-80.
[26]
Bottini C,Erba E,Tiraboschi D,et al. Climate variability and ocean fertility during the Aptian Stage[J]. Climate of the Past,2015,11(3):383-402.
[27]
Weissert H,Lini A,Föllmi K B,et al. Correlation of Early Cretaceous carbon isotope stratigraphy and platform drowning events:a possible link?[J]. Palaeogeography,Palaeoclimatology,Palaeoecology,1998,137(3/4):189-203.
[28]
王成善,胡修棉. 白垩纪世界与大洋红层[J]. 地学前缘,2005,12(2):11-20.[Wang Chengshan,Hu Xiumian. Cretaceous world and oceanic red beds[J]. Earth Science Frontiers,2005,12(2):11-20.]
[29]
胡修棉. 白垩纪中期异常地质事件与全球变化[J]. 地学前缘,2005,12(2):222-230.[Hu Xiumian. Middle Cretaceous abnormal geological events and global change[J]. Earth Science Frontiers,2005,12(2):222-230.]
[30]
黄永建,王成善,顾健. 白垩纪大洋缺氧事件:研究进展与未来展望[J]. 地质学报,2008,82(1):21-30.[Huang Yongjian, Wang Chengshan,Gu Jian. Cretaceous oceanic anoxic events:Research progress and forthcoming prospects[J]. Acta Geologica Geologica Sinica,2008,82(1):21-30.]
[31]
张振国,方念乔,高莲凤,等. 白垩纪黑色页岩与大洋红层:缺氧到富氧的过程与机制[J]. 海洋地质与第四纪地质, 2007,27(3):69-75.[Zhang Zhenguo,Fang Nianqiao,Gao Lianfeng,et al. Cretaceous black shale and oceanic red beds:process and mechanism of oceanic anoxic events and Oxic environment[J]. Marine Geology & Quaternary Geology,2007,27(3):69-75.]
[32]
Graziano R,Raspini A. High-resolution chronostratigraphy of palaeoecologic and isotopic changes in shallow-marine carbonates:Deciphering the completeness of the Aptian record in the Apennine carbonate platform (southern Italy)[J]. Cretaceous Research, 2018, 86:97-128.
[33]
Burla S, Heimhofer U, Hochuli P A, et al. Changes in sedimentary patterns of coastal and deep-sea successions from the North Atlantic (Portugal) linked to Early Cretaceous environmental change[J]. Palaeogeography,Palaeoclimatology,Palaeoecology, 2008, 257(1/2):38-57.
[34]
Vahrenkamp V C. Chemostratigraphy of the lower cretaceous Shu'aiba formation:A δ13C reference profile for the Aptian Stage from the southern Neo-Tethys Ocean[J]. Barremian-Aptian stratigraphy and hydrocarbon habitat of the eastern Arabian plate:GeoArabia Special Publication, 2010, 1(4):107-137.
[35]
Jenkyns H C,Wilson P A. Stratigraphy,paleoceanography, and evolution of Cretaceous Pacific guyots;relics from a greenhouse Earth[J]. American Journal of Science,1999,299(5):341-392.
[36]
Yamamoto K,Ishibashi M,Takayanagi H,et al. Early Aptian paleoenvironmental evolution of the Bab Basin at the southern Neo-Tethys margin:Response to global carbon-cycle perturbations across Ocean Anoxic Event 1a[J]. Geochemistry,Geophysics, Geosystems, 2013, 14(4):1104-1130.
[37]
Erba E,Channell J,Claps M,et al. Integrated stratigraphy of the Cismon APTICORE (Southern Alps,Italy);A "Reference section" for the Barremian-Aptian interval at low latitudes[J]. Journal of Foraminiferal Research, 1999, 29(4):371-391.
[38]
Menegatti A P,Weissert H,Brown R S,et al. High-esolution δ13C stratigraphy through the early Aptian "Livello Selli" of the Alpine Tethys[J]. Paleoceanography, 1998, 13(5):530-545.
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