November 10, 2022
Journal Article

Pushing the limits: Resolving paleoseawater signatures in nanoscale fluid inclusions by atom probe tomography

Abstract

New insight into the geochemistry of ancient environments can be gained through structural and chemical analyses of nanometer-scale features within minerals. Here, we present recent developments using atom probe tomography (APT) enabling direct visualization of nanoscale fluid inclusions trapped within pyrite (FeS2) and thereby chemical characterization of remnant seawater. Pyrite framboids (spherical clusters of nanocrystals) were sampled from the Middle Devonian Leicester Pyrite Member (New York). Scanning transmission electron microscopy shows low density regions distributed within the pyrite consistent with nanoscale pores (

Published: November 10, 2022

Citation

Taylor S.D., D.D. Gregory, D.E. Perea, L. Kovarik, J.B. Cliff, and T.W. Lyons. 2022. Pushing the limits: Resolving paleoseawater signatures in nanoscale fluid inclusions by atom probe tomography. Earth and Planetary Science Letters 599. PNNL-SA-172856. doi:10.1016/j.epsl.2022.117859

Research topics