Cathodoluminescence differentiates sedimentary organic matter types.

High-resolution scanning electron microscopy (SEM) visualization of sedimentary organic matter is widely utilized in the geosciences for evaluating microscale rock properties relevant to depositional environment, diagenesis, and the processes of fluid generation, transport, and storage. However, despite thousands of studies which have incorporated SEM methods, the inability of SEM to differentiate sedimentary organic matter types has hampered the pace of scientific advancement. In this study, we show that SEM-cathodoluminescence (CL) properties can be used to identify and characterize sedimentary organic matter at low thermal maturity conditions.

Author Correction: Sampling the volatile-rich transition zone beneath Bermuda.

An Amendment to this paper has been published and can be accessed via a link at the top of the paper.

Sampling the volatile-rich transition zone beneath Bermuda.

Intraplate magmatic provinces found away from plate boundaries provide direct sampling of the composition and heterogeneity of the Earth's mantle. The chemical heterogeneities that have been observed in the mantle are usually attributed to recycling during subduction, which allows for the addition of volatiles and incompatible elements into the mantle. Although many intraplate volcanoes sample deep-mantle reservoirs-possibly at the core-mantle boundary-not all intraplate volcanoes are deep-rooted, and reservoirs in other, shallower boundary layers are likely to participate in magma generation.