Guang-Yi Wei, Mingyu Zhao, Erik A Sperling, Robert R Gaines, Boriana Kalderon-Asael, Jun Shen, Chao Li, Feifei Zhang, Gaojun Li, Chuanming Zhou, Chunfang Cai, Daizhao Chen, Ke-Qing Xiao, Lei Jiang, Hong-Fei Ling, Noah J Planavsky, Lidya G Tarhan
The evolution of oxygen cycles on Earth's surface has been regulated by the balance between molecular oxygen production and consumption. The Neoproterozoic-Paleozoic transition likely marks the second rise in atmospheric and oceanic oxygen levels, widely attributed to enhanced burial of organic carbon. However, it remains disputed how marine organic carbon production and burial respond to global environmental changes and whether these feedbacks trigger global oxygenation during this interval. Here, we report a large lithium isotopic and elemental dataset from marine mudstones spanning the upper Neoproterozoic to middle Cambrian [~660 million years ago (Ma) to 500 Ma]...
March 29, 2024: Science Advances