Hadean geodynamics inferred from time-varying 142Nd/144Nd in the early Earth rock record [0.03%]
从早期地球岩石记录中随时间变化的142钕/144钕推断出的冥古宙地动力学
N S Saji,K Larsen,D Wielandt et al.
N S Saji et al.
Tracking the secular evolution of 142Nd/144Nd anomalies is important towards understanding the crust-mantle dynamics in the early Earth. Excessive scatter in the published data, however, precludes identifying the fine structure of 142Nd/144...
Oxidised micrometeorites as evidence for low atmospheric pressure on the early Earth [0.03%]
氧化微陨石表明早期地球大气压力低
P B Rimmer,O Shorttle,S Rugheimer
P B Rimmer
Reconstructing a record of the partial pressure of molecular oxygen in Earth's atmosphere is key for understanding macroevolutionary and environmental change over geological history. Recently, the oxidation state of iron in micrometeorites ...