Sr isotopic data of Holocene glauconitic pellets suggest a twofold glauconitization process that is strongly linked to the detrital clay minerals from surrounding mud which act as precursors until the K2O content of the glauconitic material reaches 4%. Above that, a detectable sea-water influence becomes progressively predominant. The process seems to start with a dissolution-crystallization reaction in equilibrium with the precursor, which is followed by a maturation process in isotopic equilibrium with sea-water Sr, while the K2O content increases further. This chemical evolutionary process may also occur for other types of clay minerals.

This content is PDF only. Please click on the PDF icon to access.

First Page Preview

First page PDF preview
You do not currently have access to this article.