Katian (Upper Ordovician) carbon isotope chemostratigraphy in the Neixiang area, central China: Implications for intercontinental correlation

TY - JOUR

T1 - Katian (Upper Ordovician) carbon isotope chemostratigraphy in the Neixiang area, central China

T2 - Implications for intercontinental correlation

AU - Jing, Xiuchun

AU - Stouge, Svend

AU - Tian, Yufeng

AU - Wang, Xunlian

AU - Zhou, Hongrui

PY - 2019/12/1

Y1 - 2019/12/1

N2 - The Katian (Upper Ordovician) Shiyanhe Formation at the Sigang section, Neixiang area, Henan Province, central China, has been investigated for carbon isotope (δ13Ccarb) chemostratigraphy. The carbon isotopic data document signal between the two major Ordovician positive shifts in δ13C, the early Katian Guttenberg and the Hirnantian excursions. The Kope (Ka1/2), Fairview (Ka2/3), Waynesville (Ka3/4), Whitewater (Ka4) excursions and a doubtful Elkhorn (Ka4) excursion are identified herein. The continuous and well-defined conodont zonal succession of the Sigang section provides a secure biostratigraphic framework for the mid-late Katian carbon isotope chemostratigraphy in China. Correlation between carbon-isotope data curve and the relative sea-level changes shows no clear correspondence, and hence the sea-level change is probably not the main driver of δ13C excursions during the Katian. Intercontinentally, the mid-late Katian carbon isotope excursions, identified mainly in the North American and Baltoscandian successions, are useful for improving long-distance stratigraphic correlations. This further suggests that these excursions represent global perturbations in the carbon cycle.

AB - The Katian (Upper Ordovician) Shiyanhe Formation at the Sigang section, Neixiang area, Henan Province, central China, has been investigated for carbon isotope (δ13Ccarb) chemostratigraphy. The carbon isotopic data document signal between the two major Ordovician positive shifts in δ13C, the early Katian Guttenberg and the Hirnantian excursions. The Kope (Ka1/2), Fairview (Ka2/3), Waynesville (Ka3/4), Whitewater (Ka4) excursions and a doubtful Elkhorn (Ka4) excursion are identified herein. The continuous and well-defined conodont zonal succession of the Sigang section provides a secure biostratigraphic framework for the mid-late Katian carbon isotope chemostratigraphy in China. Correlation between carbon-isotope data curve and the relative sea-level changes shows no clear correspondence, and hence the sea-level change is probably not the main driver of δ13C excursions during the Katian. Intercontinentally, the mid-late Katian carbon isotope excursions, identified mainly in the North American and Baltoscandian successions, are useful for improving long-distance stratigraphic correlations. This further suggests that these excursions represent global perturbations in the carbon cycle.

KW - carbon isotope stratigraphy

KW - China

KW - Katian

KW - Late Ordovician

KW - Shiyanhe Formation

U2 - 10.1017/S0016756819000372

DO - 10.1017/S0016756819000372

M3 - Journal article

AN - SCOPUS:85065883005

SN - 0016-7568

VL - 156

SP - 2053

EP - 2066

JO - Geological Magazine

JF - Geological Magazine

IS - 12

ER -