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

doi:10.1016/j.palaeo.2015.05.016

	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, Ru 1,2,3,4; Bergstroem, Stig M.5; Lu, Yuanzheng 1,2,3; Zhang, Xuelei 1; Zhang, Shiben 1,2,3; Li, Xin 1,2,3; Deng, Shenghui 1,2,3
	2015-09-01
发表期刊	PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
ISSN	0031-0182
卷号	433 页码:81-90
摘要	Samples 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.
关键词	Carbon isotopes GICE Conodonts Upper Ordovician China
DOI	10.1016/j.palaeo.2015.05.016
语种	英语
关键词[WOS]	NORTH-AMERICA ; LATE MIDDLE ; SOUTH CHINA ; 1ST RECORD ; STRATIGRAPHY ; BALTOSCANDIA ; MIDCONTINENT ; EXTINCTION ; GLACIATION ; WIDESPREAD
资助项目	China 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研究方向	Physical Geography ; Geology ; Paleontology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS记录号	WOS:000358466400007
项目资助者	China 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'
出版者	ELSEVIER SCIENCE BV
文献类型	期刊论文
条目标识符	http://ir.nigpas.ac.cn/handle/332004/11971
专题	中国科学院南京地质古生物研究所
通讯作者	Deng, Shenghui
作者单位	1.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
第一作者单位	中国科学院南京地质古生物研究所
推荐引用方式 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.