A channel sampling strategy for measurement of mineral modal and chemical composition of drill cores: application to lower oceanic crustal rocks from IODP Expedition 345 to the Hess Deep rift

Wintsch, Robert P.; Meyer, Romain; Bish, David L.; Deasy, Ryan T.; Nozaka, Toshio; Johnson, Carley

doi:https://doi.org/10.5194/sd-31-71-2022

Articles | Volume 31

https://doi.org/10.5194/sd-31-71-2022

© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/sd-31-71-2022

© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 31

Technical development

|

28 Oct 2022

Technical development |

| 28 Oct 2022

A channel sampling strategy for measurement of mineral modal and chemical composition of drill cores: application to lower oceanic crustal rocks from IODP Expedition 345 to the Hess Deep rift

Robert P. Wintsch, Romain Meyer, David L. Bish, Ryan T. Deasy, Toshio Nozaka, and Carley Johnson

Data sets

Bulk Composition of Fast-Spreading Oceanic Crust: Insights from the Lower Cumulates of the East Pacific Rise and from Cocos–Nazca Rift Basalts, Hess Deep R. T. Deasy, R. P. Wintsch, and R. Meyer https://doi.org/10.1093/petrology/egab019

Short summary

We report a new method of obtaining representative samples of drill core with an example from the lower oceanic crust in the Hess Deep rift. Sawing drill core in half produces 1.3 g of rock per centimeter of core cut – material usually discarded. We show that when collected and analyzed properly, these samples reveal both the chemical composition of lower oceanic crust and the reactions that change the mineralogical and chemical composition of that crust.