Can a Record of Ocean Chemistry be Preserved in the Oceanic Crust?

Add to your list(s) Download to your calendar using vCal

• Dr Sasha Turchyn, University of Cambridge
• Monday 07 February 2022, 18:00-19:00
• Tilley Lecture Theatre, Department of Earth Sciences, Downing Site.

If you have a question about this talk, please contact Eloise Matthews.

“The oxygen isotopic composition of the ocean varies over recent times (last 30-50 million years) as a function of ice volume but whether it varies over longer geological time (last 600 million years) remains uncertain and records suggest different things. Here I will discuss an attempt to reconstruct the oxygen isotopic composition of hydrothermal vent fluid recorded in quartz and epidote veins formed in ancient oceanic crust and preserved in ophiolites. High temperature vent fluids are evolved from seawater through water-rock interaction and if this can be accurately modelled then the composition of seawater can be known. I will discuss new approaches we are using involving reactive transport models to understand the controls on water-rock interaction and chemical evolution in hydrothermal systems.”

This talk is part of the Sedgwick Club talks series.

This talk is included in these lists:

• Department of Earth Sciences seminars
• Sedgwick Club talks
• Tilley Lecture Theatre, Department of Earth Sciences, Downing Site

Note that ex-directory lists are not shown.