Comparison of three preservation techniques for slowing dissolution of calcareous nannofossils in organic rich sediments

Micropaleontology
By: , and 

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Abstract

In an attempt to halt or reduce dissolution of calcareous nannofossils in organic and/or pyrite-rich sediments, three different methods of short-term storage preservation were tested for efficacy: vacuum packing, argon gas replacement, and buffered water. Abundance counts of calcareous nannofossil assemblages over a six month period showed that none of the three preservation methods were consistently effective in reducing assemblage loss due to dissolution. In most cases, the control slides made at the drill site had more abundant calcareous nannofossil assemblages than those slides made from sediments stored via vacuum packing, argon gas replacement, or buffered water. Thin section and XRD analyses showed that in most cases, <1% pyrite was needed to drive the oxidation-reduction reaction that resulted in dissolution, even in carbonate-rich sediments.

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Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Comparison of three preservation techniques for slowing dissolution of calcareous nannofossils in organic rich sediments
Series title Micropaleontology
Volume 61
Issue 3
Year Published 2015
Language English
Publisher Micropaleontology Press
Contributing office(s) Eastern Geology and Paleoclimate Science Center
Description 16 p.
First page 149
Last page 164
Country United States
State Georgia, Maryland, North Carolina
Online Only (Y/N) N
Additional Online Files (Y/N) N