Revisiting diagenesis on the Ontong-Java Plateau: evidence for authigenic crust precipitation in Globorotalia tumida

Authors: Elizabeth Read (University of Cambridge) , Oscar Branson (University of Cambridge) , Simon Redfern (University of Cambridge) , Christoph Rau (Diamond Light Source) , Henry Elderfield (University of Cambridge)
Co-authored by industrial partner: No

Type: Conference Paper
Conference: EGU General Assembly 2015
Peer Reviewed: No

State: Published (Approved)
Published: April 2015
Diamond Proposal Number(s): 8532

Open Access Open Access

Abstract: Foraminifera hold the key to the past climate of the Earth. They can be retrieved from core tops of sea floor sediments, allowing the record to extend back many thousands to millions of years. The time lag between the foraminifera formation, deposition, and the routine analysis can therefore be very long. The sites from which foraminifera are collected and cored experience different physicochemical conditions to those which they were formed and deposited in. The samples used in this study are from the Ontong-Java Plateau, west equatorial Pacific, and were studied in Brown and Elderfield, 1996. Synchrotron X-ray computed tomography (sXCT) and electron micro-probe analyses were carried out on samples collected from different core top depths, chosen to span the lysocline in the area, in order to re-asses the character and extent of diagenetic alteration.

Subject Areas: Earth Science

Instruments: I13-2-Diamond Manchester Imaging