The secular trend of seawater strontium isotope ratio (87 Sr/86 Sr) reflects changes in the
relative contributions of continental versus mantle reservoirs to ocean composition, and …

BACKGROUND Anthropogenic emissions are rapidly altering Earth's climate, pushing it
toward a warmer state for which there is no historical precedent. Although no perfect analog …

Geological evidence indicates that grounded ice sheets reached sea level at all latitudes
during two long-lived Cryogenian (58 and≥ 5 My) glaciations. Combined uranium-lead and …

The snowball Earth hypothesis predicts globally synchronous glaciations that persisted on a
multimillion year time scale. Geochronological tests of this hypothesis have been limited by …

Atmospheric CO 2 levels and global climate are regulated on geological timescales by the
silicate weathering feedback. However, this thermostat has failed multiple times in Earth's …

Abstract Cryogenian Sturtian and Marinoan glacial and associated strata record the most
severe paleoclimatic events in Earth history and are the main test ground of the snowball …

四川盆地安岳特大型气田的发现坚定了勘探家在元古界—寒武系找油找气信心.
以中新元古代大地构造格局重建与重大地质事件分析为基础, 从烃源岩, 储集层条件及成藏组合 …

Stratigraphic, geochronologic, and geochemical patterns of Neoproterozoic to Cambrian
sedimentary and volcanic rocks in Utah, Nevada, and SE Idaho record a dynamically …

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

Constructing an accurate timeline is critical for reconstructing the Earth systems through
critical transitions in climate, geochemistry, and life. Existing dates constrain synchronous …