11 datasets found

International audience

During the Archean (4 to 2.5 Ga ago), the Earth experienced the biggest changes in terms of geological and biological settings – continental growth, transition from...

Komatiites are ultrabasic volcanic rocks characteristic of the Archean and Proterozoic eras. In this study, we investigate the petrogenesis of the komatiites of the...

It is the study of banded iron formations (BIFs) that provides understanding into the conditions of the Earth’s oceans and atmosphere during the Archean and Early...

International audience

International audience

The formation of the continental crust is one of the main topics of geosciences and, in this debate, the geologist plays a major role allowing the knowledge of the...

The composition and the evolution of the silicate Earth during the Hadean-Eoarchean is widely debated and largely unknown due to the limited geological record. The...

The search for organic biosignatures is motivated by the hope of understanding the conditions of emergence of life on Earth and the perspective of finding traces of...

Archean cherts potentially constrain the primitive environment in which life emerged and evolved. These siliceous rocks formed by three processes : C-cherts (primary...

International audience