In the modern ocean, U reduction and incorporation into anoxic sediments imparts a large isotopic fractionation of approximately +0.6‰ that shifts seawater δ 238 value ( U/ 235 U, expressed as per mil deviation relative to CRM-112a) continental runoff. Given long residence time in oceans (∼400 kyr), composition carbonates (taken proxy for seawater) reflects global balance between other sinks. T...

The Reguibat Shield is an area of intensive uranium exploration and about 80 ore occurrences have been discovered in recent decades within its borders. region the study located Tasiast-Tijirit terrane, which represents a northwestern part Archean domain Shield. rocks terrane are Mesoarchean age. main types migmatites, gneisses amphibolites, greenstone associations, granitic intrusions pegmatite...

Global wind-energy development has increased exponentially in recent decades and is expected to double capacity Canada by 2040. Wind-farm significant implications for wildlife, particularly raptors, where injury or death from turbine strikes other cumulative effects are well documented. Minimizing conflict important species at risk, such as the Ferruginous Hawk (Buteo regalis), because...