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Upper Ordovician carbon isotope chemostratigraphy on the Yangtze Platform, Southwestern China: Implications for the correlation of the Guttenberg delta C-13 excursion (GICE) and paleoceanic change
Fan, Ru1,2,3,4; Bergstroem, Stig M.5; Lu, Yuanzheng1,2,3; Zhang, Xuelei1; Zhang, Shiben1,2,3; Li, Xin1,2,3; Deng, Shenghui1,2,3
2015-09-01
Source PublicationPALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
ISSN0031-0182
Volume433Pages:81-90
AbstractSamples of Upper Ordovician marine carbonates from four sections on the Yangtze Platform (I, the Liangcun section northeast of Xishui County Town, Guizhou Province; 2, the Zhuazhuayan section southwest of Leibo County Town, Sichuan Province; 3, the Xiaogangwan section east of Wulong County Town, Chongqing Municipality; 4, the Shatan section north of Nanjiang County Town, Sichuan Province) have been analyzed for carbon isotope (delta C-13) chemostratigraphy. A distinct positive delta C-13 excursion (delta C-13(max) > 2) is observed in all sections, which ranges through the Hamarodus brevirameus conodont zone, and locally into slightly younger strata. The base of this zone is the First Appearance Datum (FAD) of H. brevirameus and its top coincides with the FAD of the conodont Protopanderodus insculptus. Based on its position in the H. brevirameus zone, this excursion is identified as the well-known Guttenberg Excursion (GICE) confirming the global significance of this paleoceanographic event. The fact that in the Black Knob Ridge section in the USA, the GSSP of the base of the global Katian Stage, the beginning of the GICE is just below the base of the Katian makes it possible to locate this key level in our study sections even in the absence of the diagnostic graptolite Diplacanthograptus caudatus. Our carbon curves through the GICE interval show three minor secondary peaks reflecting paleoceanographic changes or selective preservation of the isotope signal. However, because a global review of the GICE shows that such minor peaks, which are often based on a single elevated delta C-13 value, are of irregular occurrence, they are interpreted as local, rather than global, phenomena. The suggested global cooling in the early Katian might have favored the generation of methane hydrates and hence the reduction of the amount of C-12 in the marine carbonates. (C) 2015 Elsevier B.V. All rights reserved.
KeywordCarbon isotopes GICE Conodonts Upper Ordovician China
DOI10.1016/j.palaeo.2015.05.016
Language英语
WOS KeywordNORTH-AMERICA ; LATE MIDDLE ; SOUTH CHINA ; 1ST RECORD ; STRATIGRAPHY ; BALTOSCANDIA ; MIDCONTINENT ; EXTINCTION ; GLACIATION ; WIDESPREAD
Funding ProjectChina National Science Project 'Development of Coal Seam Gas and Large Oil-Gas Fields'[20008ZX05004] ; China National Science Project 'Development of Coal Seam Gas and Large Oil-Gas Fields'[2011ZX05004-002] ; Fan's Postdoctoral Program 'Economic Stratigraphy of the Ordovician and Silurian in South China'
WOS Research AreaPhysical Geography ; Geology ; Paleontology
WOS SubjectGeography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS IDWOS:000358466400007
Funding OrganizationChina National Science Project 'Development of Coal Seam Gas and Large Oil-Gas Fields' ; Fan's Postdoctoral Program 'Economic Stratigraphy of the Ordovician and Silurian in South China'
PublisherELSEVIER SCIENCE BV
Citation statistics
Document Type期刊论文
Identifierhttp://ir.nigpas.ac.cn/handle/332004/11971
Collection中国科学院南京地质古生物研究所
Corresponding AuthorDeng, Shenghui
Affiliation1.Res Inst Petr Explorat & Dev, Beijing 100083, Peoples R China
2.State Key Lab Enhanced Oil Recovery China, Beijing 100083, Peoples R China
3.Key Lab Oil & Gas Reservoirs PetroChina, Being 100083, Peoples R China
4.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, Nanjing 210008, Jiangsu, Peoples R China
5.Ohio State Univ, Sch Earth Sci, Div Hist Geol, Columbus, OH 43210 USA
First Author AffilicationNanjing Institute of Geology and Palaeonotology,CAS
Recommended Citation
GB/T 7714
Fan, Ru,Bergstroem, Stig M.,Lu, Yuanzheng,et al. Upper Ordovician carbon isotope chemostratigraphy on the Yangtze Platform, Southwestern China: Implications for the correlation of the Guttenberg delta C-13 excursion (GICE) and paleoceanic change[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2015,433:81-90.
APA Fan, Ru.,Bergstroem, Stig M..,Lu, Yuanzheng.,Zhang, Xuelei.,Zhang, Shiben.,...&Deng, Shenghui.(2015).Upper Ordovician carbon isotope chemostratigraphy on the Yangtze Platform, Southwestern China: Implications for the correlation of the Guttenberg delta C-13 excursion (GICE) and paleoceanic change.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,433,81-90.
MLA Fan, Ru,et al."Upper Ordovician carbon isotope chemostratigraphy on the Yangtze Platform, Southwestern China: Implications for the correlation of the Guttenberg delta C-13 excursion (GICE) and paleoceanic change".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 433(2015):81-90.
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