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Archaeocyathan zonation of the Yangtze Platform: Implications for regional and global correlation of lower Cambrian stages

Published online by Cambridge University Press:  24 July 2015

AIHUA YANG ,
MAOYAN ZHU ,
ANDREY YU ZHURAVLEV ,
KEXING YUAN ,
JUNMING ZHANG  and
YAQIAN CHEN
AIHUA YANG*
Affiliation:
State Key Laboratory for Mineral Deposits Research, School of Earth Sciences and Engineering, Nanjing University, 163 Xianlindadao Ave., Nanjing 210046, China
MAOYAN ZHU
Affiliation:
State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Paleontology, Chinese Academy of Sciences, Nanjing 210008, China
ANDREY YU ZHURAVLEV
Affiliation:
Department of Biological Evolution, Faculty of Biology, Moscow State University named after M.V. Lomonosov, Moscow, GSP-1, 119991, Russia
KEXING YUAN
Affiliation:
Kunming Prospecting Design Institute of China Nonferrous Metals Industry, Kunming 650051, China
JUNMING ZHANG
Affiliation:
State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Paleontology, Chinese Academy of Sciences, Nanjing 210008, China
YAQIAN CHEN
Affiliation:
Kunming Prospecting Design Institute of China Nonferrous Metals Industry, Kunming 650051, China
*
†Author for correspondence: ahyang@nju.edu.cn
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Abstract

Detailed analysis of the distribution of archaeocyaths in five lower Cambrian sections in South China has resulted in the erection of four new archaeocyathan zones and one new archaeocyathan bed. Listed in order of ascending age, these are: the Dailycyathus xiuqiensis Zone; the Dictyocyathus shaanxiensis Zone; the Spirillicyathus duplex Range Zone; the Sibirecyathus meitanensis Range Zone; and the Archaeocyathus yanjiaoensis beds. These new subdivisions permit a correlation of lower Cambrian strata both within the area of the Yangtze Platform (South China) as well as between this region and Siberia, Australia, Western Europe and North America. Within the Yangtze Platform area, archaeocyaths of the Dailycyathus xiuqiensis and Dictyocyathus shaanxiensis zones co-occur with trilobites of the middle and upper Eoredlichia Trilobite Zone of the Qiongzhusian Stage. The Spirillicyathus duplex and the Sibirecyathus meitanensis Range Zone correspond to the Malungia, Yiliangella–Yunnanaspis and Drepanuroides Trilobite zones of the basal and middle Canglangpuan Stage, respectively. Finally, the Archaeocyathus yanjiaoensis beds belong to the Palaeolenus fengyangensis Trilobite Zone of the upper Canglangpuan Stage. Global correlations based on archaeocyath assemblage zones suggest that: (1) the middle–upper Qiongzhusian of South China correlates with the middle Atdabanian Stage of the Siberian Platform, the Warriootacyathus wilkawillinensis Archaeocyath Zone in South Australia, the middle Issendalenian Stage of Morocco and the lower Ovetian Stage in Spain; (2) the lowermost Canglangpuan Stage of South China correlates with the uppermost Atdabanian of the Siberian Platform, the Spirillicyathus tenuis – Jugalicyathus tardus archaeocyath zones in South Australia, the uppermost Issendalenian – lower Banian stages of Morocco, the middle Ovetian Stage of Spain and the middle Montezuman Stage of North America; (3) the middle Canglangpuan Stage approximates the lowermost Botoman Stage of the Siberian Platform, middle Banian Stage of Morocco, the uppermost Ovetian – lowermost Marianian stages of Spain and the upper Montezuman Stage of North America; (4) the uppermost Canglangpuan Stage is equivalent of the middle Toyonian Stage of the Siberian Platform, Archaeocyathus abacus beds in Australia, the middle Bilbilian Stage in Spain and the middle Dyeran Stage (Bolbolenellus euryparia Trilobite Zone) in North America.

Keywords

lower CambrianarchaeocyathsbiostratigraphySouth China
Type
Original Articles
Information
Geological Magazine , Volume 153 , Issue 3 , May 2016 , pp. 388 - 409
Copyright
Copyright © Cambridge University Press 2015 

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