High-resolution integrated stratigraphy of Upper Ordovician to lower Silurian strata: applications to black shale drill cores in South China

This paper presents an integrated stratigraphy of the Upper Ordovician to lower Silurian strata from the Yangtze platform, focusing on detailed graptolite biostratigraphy and 8 13 C org chemostratigraphy of a continuous drill core section. We establish ten graptolite biozones within the Wufeng and L...

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Bibliographic Details
Published in:Newsletters on Stratigraphy
Main Authors: Sun, Zongyuan, Melchin, Michael J., Storch, Petr, Chen, Qing, Zhao, Fangqi, Fan, Junxuan
Format: Report
Language:English
Published: GEBRUDER BORNTRAEGER 2024
Subjects:
Wufeng and Lungmachi formations
carbon isotope excursions
graptolite biostratigraphy
inte- grated stratigraphy
drill core
CARBON-ISOTOPE CHEMOSTRATIGRAPHY
SYNFORM BARRANDIAN AREA
ARCTIC CANADA
DISTRIBUTION PATTERN
YANGTZE PLATFORM
LLANDOVERY
BOUNDARY
BIOSTRATIGRAPHY
STRATOTYPE
GEOGRAPHY
Geology
Arctic
Canada
Online Access:http://ir.nigpas.ac.cn/handle/332004/44438
http://ir.nigpas.ac.cn/handle/332004/44439
https://doi.org/10.1127/nos/2024/0752
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Summary:This paper presents an integrated stratigraphy of the Upper Ordovician to lower Silurian strata from the Yangtze platform, focusing on detailed graptolite biostratigraphy and 8 13 C org chemostratigraphy of a continuous drill core section. We establish ten graptolite biozones within the Wufeng and Lungmachi forma- tions and identify the LKCIE (Late Katian Carbon Isotope Excursion), HICE (Hirnantian Isotope Carbon Excursion), and EACIE (Early Aeronian Carbon Isotope Excursion) in the 8 13 C org curve. Through the identi- fication of four positive carbon isotope excursions, including the LACIE (Late Aeronian Carbon Isotope Excursion), this paper addresses and clarifies the substantial uncertainties in biozonal boundaries identified in previous research, providing a definitive integrated stratigraphy framework, and significantly enhances both regional and global stratigraphic correlation. Our approach revises biozone boundaries within drill cores and outcrop sections in South China, revealing abrupt turning points in depositional rate changes within the Lungmachi Formation, linked to the Kwangsian Orogeny and global sea-level fluctuations. This high-resolu- tion stratigraphic framework contributes to biostratigraphy and chemostratigraphy and aids in efficient hy- drocarbon

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