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- W4376278889 abstract "The Ediacaran–Cambrian transition is characterized by an unprecedented change in biosphere, lithosphere, and atmosphere. However, the identification of this transition and its global correlation remains debated. East Yunnan is a region of utmost importance in the study of the Ediacaran-Cambrian transition. Although strata from this region have been well studied, recognition of the base of the Cambrian continues to be controversial. This paper presents, a carbon chemostratigraphic isotope and trace element profile through the Dengying and Zhujiaqing formations in the Sujiawa section in East Yunnan. Through carbon isotope and trace element analyses of the Dengying and Zhujiaqing formations we attempt to regionally correlate the section and discuss the paleo-marine redox environment changes during this period. The Fe content of samples is low and the Mn/Sr ratios of the majority of the Sujiawa section samples is lower than 10 and shows no correlations with δ 13 C carb and δ 18 O carb values, indicating that the samples retain near-primary δ 13 C carb characteristics. The carbon isotope profile from the Sujiawa section, shows a prominent negative δ 13 C carb in the basal Zhongyicun Member (N1’, −7.3‰) that most likely represents the prominent negative excursion recorded in Ediacaran-Cambrian strata across the world. REE patterns and Y/Ho ratios were used to screen samples, to ensure that the primary seawater REE features and Ce anomalies were preserved. The samples satisfying this screening process show seawater-like REE distribution patterns in leached carbonates and may have recorded Ce anomalies of the seawater from which the carbonates precipitated. These data show that the Baiyanshao Member has Ce/Ce* values between 0.57 and 0.88, the Daibu Member between 0.56 and 0.83, and the Zhongyicun Member between 0.60 and 0.96. The Ce anomalies through the section indicates that the region experienced suboxic-oxic-anoxic conditions throughout the Ediacaran-Cambrian period. Carbon isotope and trace element analyses indicate that the strata record a negative carbon isotope excursion event and anoxic conditions during the period of deposition. This study complements the carbon chemostratigraphic information and trace element data in the region and provides valuable clues for understanding the lithofacies changes through the Ediacaran and Cambrian in different regions of South China." @default.
- W4376278889 created "2023-05-13" @default.
- W4376278889 creator A5013726931 @default.
- W4376278889 creator A5020084287 @default.
- W4376278889 creator A5033073898 @default.
- W4376278889 creator A5044657775 @default.
- W4376278889 creator A5054254155 @default.
- W4376278889 creator A5055964434 @default.
- W4376278889 creator A5059299782 @default.
- W4376278889 creator A5063386786 @default.
- W4376278889 date "2023-05-11" @default.
- W4376278889 modified "2023-09-28" @default.
- W4376278889 title "Geochemical records and environmental analysis of the Ediacaran-Cambrian boundary in Eastern Yunnan, South China" @default.
- W4376278889 cites W1682777677 @default.
- W4376278889 cites W1968486409 @default.
- W4376278889 cites W1968499642 @default.
- W4376278889 cites W1969824833 @default.
- W4376278889 cites W1977246079 @default.
- W4376278889 cites W1983916130 @default.
- W4376278889 cites W1985611314 @default.
- W4376278889 cites W1988680430 @default.
- W4376278889 cites W1989230282 @default.
- W4376278889 cites W1994930702 @default.
- W4376278889 cites W1995137647 @default.
- W4376278889 cites W1996587385 @default.
- W4376278889 cites W1997065722 @default.
- W4376278889 cites W2004728976 @default.
- W4376278889 cites W2008775099 @default.
- W4376278889 cites W2010021578 @default.
- W4376278889 cites W2011968190 @default.
- W4376278889 cites W2012212240 @default.
- W4376278889 cites W2015555377 @default.
- W4376278889 cites W2016003875 @default.
- W4376278889 cites W2016379558 @default.
- W4376278889 cites W2016581740 @default.
- W4376278889 cites W2017055037 @default.
- W4376278889 cites W2020610733 @default.
- W4376278889 cites W2021151202 @default.
- W4376278889 cites W2023128955 @default.
- W4376278889 cites W2042155317 @default.
- W4376278889 cites W2042189564 @default.
- W4376278889 cites W2046970822 @default.
- W4376278889 cites W2047349403 @default.
- W4376278889 cites W2054524404 @default.
- W4376278889 cites W2055019317 @default.
- W4376278889 cites W2056699201 @default.
- W4376278889 cites W2057252645 @default.
- W4376278889 cites W2057260077 @default.
- W4376278889 cites W2061755603 @default.
- W4376278889 cites W2063622858 @default.
- W4376278889 cites W2070285549 @default.
- W4376278889 cites W2071016525 @default.
- W4376278889 cites W2073448816 @default.
- W4376278889 cites W2075619059 @default.
- W4376278889 cites W2080386235 @default.
- W4376278889 cites W2086443259 @default.
- W4376278889 cites W2090533306 @default.
- W4376278889 cites W2093142430 @default.
- W4376278889 cites W2093154768 @default.
- W4376278889 cites W2096901723 @default.
- W4376278889 cites W2097935007 @default.
- W4376278889 cites W2103309015 @default.
- W4376278889 cites W2111968947 @default.
- W4376278889 cites W2115053158 @default.
- W4376278889 cites W2118715042 @default.
- W4376278889 cites W2119179804 @default.
- W4376278889 cites W2121539408 @default.
- W4376278889 cites W2121956394 @default.
- W4376278889 cites W2133194253 @default.
- W4376278889 cites W2135959037 @default.
- W4376278889 cites W2136964181 @default.
- W4376278889 cites W2137187305 @default.
- W4376278889 cites W2141990905 @default.
- W4376278889 cites W2147617970 @default.
- W4376278889 cites W2147951832 @default.
- W4376278889 cites W2150127665 @default.
- W4376278889 cites W2157222225 @default.
- W4376278889 cites W2163843871 @default.
- W4376278889 cites W2166950793 @default.
- W4376278889 cites W2167028996 @default.
- W4376278889 cites W2167256788 @default.
- W4376278889 cites W2168628209 @default.
- W4376278889 cites W2294270396 @default.
- W4376278889 cites W2294528890 @default.
- W4376278889 cites W2313539223 @default.
- W4376278889 cites W2330764013 @default.
- W4376278889 cites W2467732495 @default.
- W4376278889 cites W2521338193 @default.
- W4376278889 cites W2558415758 @default.
- W4376278889 cites W2595726824 @default.
- W4376278889 cites W2608014462 @default.
- W4376278889 cites W2620404174 @default.
- W4376278889 cites W2765194541 @default.
- W4376278889 cites W2800264081 @default.
- W4376278889 cites W2807110188 @default.
- W4376278889 cites W2807843718 @default.
- W4376278889 cites W2884527531 @default.
- W4376278889 cites W2902724361 @default.
- W4376278889 cites W2907213876 @default.
- W4376278889 cites W2917380209 @default.