The Yudomski event and subsequent decline: new evidence from δ34S data of lower and middle Cambrian evaporites in the Tarim Basin, western China

• Fan-Wei Meng ^[1] ; Zhi-li Zhang ^[7] ; James D. Schiffbauer ^[2] ; Qin-Gong Zhuo ^[3] ; Meng-jun Zhao ^[3] ; Pei Ni ^[4] ; Wen-Hang Liu ^[8] ; Naveed Ahsan ^[5] ; Saif Ur Rehman ^[6]
  1. [1] Chinese Academy of Sciences

     Chinese Academy of Sciences

     China

     
  2. [2] University of Missouri

     University of Missouri

     Township of Columbia, Estados Unidos

     
  3. [3] Research Institute of Petroleum Exploration and Development

     Research Institute of Petroleum Exploration and Development

     China

     
  4. [4] Nanjing University

     Nanjing University

     China

     
  5. [5] University of the Punjab

     University of the Punjab

     Pakistán

     
  6. [6] University of Sargodha

     University of Sargodha

     Pakistán

     
  7. [7] Petroleum Exploration and Development Research Institute, SINOPEC
  8. [8] Institute of Geological Sciences, Polish Academy of Sciences

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• Localización: Carbonates and Evaporites, ISSN 0891-2556, Vol. 34, Nº. 3, 2019, págs. 1117-1129
• Idioma: inglés
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• Resumen

  • Marine evaporitic sulfates (gypsum and anhydrite) can record ancient seawater sulfur isotopic data; however, these records are scarce and widely dispersed owing to both restricted environments in which they form and their propensity to be eroded. The late Neoproterozoic–early Cambrian transition was a pivotal timeframe in Earth’s history, witnessing the early evolution of animal life and major environmental changes. Seawater chemistry changed abruptly during this interval, including significant changes to the sulfur cycle as evidenced by unusually high sulfur isotopic values. This positive sulfur excursion, termed the Yudomski Event, has been reported previously from early and middle Cambrian units in Siberia, Iran, Australia, and India. In this study, we provide the first report of the Yudomski Event in early and middle Cambrian evaporites from the Tarim Basin, northwestern China. Our data support this event having been of global significance. We additionally report early and middle Ordovician sulfur data from China, which constrain the decline of the Yudomski Event to the late Cambrian.