Scientific Drilling
Scientific Drilling
SD
Articles | Volume 31
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

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Latest update: 22 Jun 2025
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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.
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