The study reveals the relationship between the oxidation events of ancient oceans and the evolution of the earliest large-scale eunuts

Zhu Xiangkun, a member of the Geological Research Institute of the Chinese Academy of Geoscology, first reported an oxidation event on Earth about 1.57 billion years ago, corresponding to the time of the earliest large-scale multicellular uclear organisms, in an online post on
, Beijing time. This discovery overturns the traditional understanding of "continuous low oxygen on the Earth's surface 1.8 billion to 800 million years ago" and confirms the important role of oxygen in the evolution of early solar and nuclear organisms, representing a major breakthrough in the study of the collaborative evolution of the Earth's early environment and life.
study area of this discovery is located in the geological profile nature reserve of Tianjin YiXian County, China. The region is well preserved as one of the world's most classical research areas for revealing the mysteries of Earth's evolution from around 1.5 billion years ago. Zhu Xiangkun and his collaborators effectively extracted the geochemical information of ancient seawater at that time by carrying out detailed geochemical research on the sedimentary carbonate rocks of ancient oceans about 1.6 billion to 1.55 billion years ago. The study found that the ancient oceans of the Middle Yuan were a dynamic evolutionary process of continuous oxidation, which began about 1.57 billion years ago. Moreover, the earliest known fossils of large multicellular nuclei were found in the sedimentary formations of the Yanshan Mountains of China about 1.56 billion years ago, slightly later than the start time of the ancient ocean oxidation events found in this study.
the evolution of the ancient marine environment in ancient China is far from the traditional 'monotonous', but a dynamic evolution of continuous oxidation. Zhu Xiangkun explained in the academic report meeting on the same day, "The emergence of large multicellular nuclear organisms in the Zhuang group slightly later than the start time of the oxidation time, once again confirmed the important role of oxygen in the early evolution of the uertes, and strongly proved that elevated oxygen content is a necessary condition for the evolution of the true nuclear organisms." This
is of great scientific significance to the Chinese people. The period from 1.8 billion to 800 million years ago has been considered to be the quietest period in Earth's history, with the Earth's surface litmatosphere, atmosphere, hydrosphere and biosphere remaining in a near-constant "stable" state. Some scientists believe that atmospheric oxygen levels during this period may even be less than 0.1% of modern oxygen levels. But with the discovery of more and more fossils of true nuclear organisms during this period, especially the discovery of large multicellular endocysts 1.56 billion years ago, the debate over "whether there is an inevitable link between the evolution of early nuclear organisms and changes in the surface environment" has intensified. The discovery of ancient ocean oxidation events recorded in carbonate rocks between 1.6 billion and 1.55 billion years ago overturns the traditional understanding of "continuous low oxygen" in this period, and also strongly proves that there is an inline link between the evolution of early ceretony and changes in the surface environment, and that elevated oxygen content is a necessary condition for the evolution of ceuteral organisms. The new discovery will also spur scientists to revisit the mysteries of the evolution of the Earth's system from 1.8 billion to 800 million years ago from different angles.
, there were two relatively large atmospheric oxygenation events during the geological history period, which occurred about 2.4 billion to 2 billion years ago and 800 million to 540 million years ago, respectively. About 2.4 billion years ago, atmospheric oxygen levels on the Earth's surface were extremely low, less than 0.001% of modern oxygen levels, and about 540 million years ago, atmospheric oxygen levels increased to 20% higher than modern oxygen levels. In the intermediate stage, the Earth's surface was considered to be in a persistently low oxygen state 1.8 billion to 800 million years ago, and some scientists estimate that atmospheric oxygen levels may have been even lower than 0.1% of modern oxygen levels. But in recent years, more and more sedimentary formations from about 1.5 billion years ago have found rich and diverse fossils of endocene biological organisms, especially in eastern China, where the earliest large multicellular biosilves on Earth date about 1.56 billion years ago, leading scientists to debate whether there is an inevitable link between early solar evolution and changes in the earth's surface environment, or whether biological evolution is only the result of gene expression and evolution, independent of the environment. (Source: Science Network, Princess Feng)