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Discovery of Early Proterozoic Carbon Isotope Shifts
Author(s) -
Hua Zhong,
Yongsheng Ma
Publication year - 1995
Publication title -
acta geologica sinica ‐ english edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 61
eISSN - 1755-6724
pISSN - 1000-9515
DOI - 10.1111/j.1755-6724.1995.mp8004008.x
Subject(s) - proterozoic , isotopes of carbon , geology , precambrian , carbon fibers , cretaceous , paleontology , permian , δ13c , isotope , geochemistry , total organic carbon , stable isotope ratio , chemistry , tectonics , environmental chemistry , materials science , physics , structural basin , quantum mechanics , composite number , composite material
The authors have detailedly and systematically studied the carbon isotopic composition of Early Proterozoic carbonate rocks. Samples which are all dolomicrite were taken from the Jianancun, Daguandong and Huaiyincun Formations of the Hutuo Group in Wutai County Shanxi Province, North China. A total of 209 samples were analysed for their carbon isotope compositions, and the mean sampling interval was 6.9 m. Carbon isotope analysis clearly shows δ 13 C shifts at the boundary between the Jian'ancun Formation and Daguandong Formation and near the boundary between the Daguandong Formation and Huaiyincun Formation. Like carbon isotope shifts at the Cretaceous ‐ Tertiary, Permian ‐ Triassic and Precambrian ‐ Cambrian boundaries, the discovery of δ 13 C shifts in the Early Proterozoic has important significance in further studies on Early Proterozoic biotic evolution, regional and global stratigraphic correlation, and carbon geochemical cycles.