The rapid increase of carbon dioxide concentration in Earth's modern atmosphere is a
matter of major concern. But for the atmosphere of roughly two-and-half billion years ago …

Nitrogen is an essential nutrient for all life on Earth and it acts as a major control on
biological productivity in the modern ocean. Accurate reconstructions of the evolution of life …

Although pH is a fundamental property of Earth's oceans, critical to our understanding of
seawater biogeochemistry, its long-timescale geologic history is poorly constrained. We …

Iron formations (IF) represent an iron-rich rock type that typifies many Archaean and
Proterozoic supracrustal successions and are chemical archives of Precambrian seawater …

The atmosphere–ocean system experienced a progressive change from anoxic to more
oxidizing conditions through time. This oxidation is traditionally envisaged to have occurred …

Long-term secular variation in seawater sulfate concentrations ([SO 4 2−] SW) is of interest
owing to its relationship to the oxygenation history of Earth's surface environment. In this …

赋存在石墨片岩和大理岩内的山西中条山沉积岩容矿型铜钴矿床, 其矿化类型为细脉浸染状和热
液脉状, 与中非铜矿带的钴矿床非常相似. 本文以关键金属钴作为主要研究对象 …

Geochemical proxies based on Fe abundance (Fe/Al) and Fe-speciation have been widely
applied to marine sediments in order to unravel paleo-depositional redox conditions though …

Abstract The Proterozoic Eon spans Earth's middle age during which many important
transitions occurred. These transitions include the oxygenation of the atmosphere …

Abstract The Great Oxygenation Event (GOE), ca. 2.4 billion years ago, transformed life and
environments on Earth. Its causes, however, are debated. We mathematically analyze the …