Random article ( of 1062 ) Latest updates

User Tools

Site Tools


content:earth_sciences:dolomite_problem

Wikenigma - an Encyclopedia of Unknowns Wikenigma - an Encyclopedia of the Unknown

The 'Dolomite Problem'

Dolomite (CaMg(CO3)2) is a ubiquitous carbonate mineral. Geologists have been debating exactly how it formed for more than two centuries. Because it's a sedimentary rock, it's clear that it was deposited in vast amounts on prehistoric seabeds.

The 'dolomitization' reaction has been resolved as :

2CaCO3 + Mg2+ โ†’ CaMg(CO3)2 + Ca2+

But can only take place in a very limited way in modern-day seawater - so the vast deposits of dolomite cannot currently be explained. The so-called 'dolomite problem'.

It's proposed by some research groups that ancient seawater composition was very significantly different to today's. Or, that some biological process was involved (sulfate-reducing bacteria living in oxygen-free conditions may have precipitated dolomite).

Further reading Wikipedia


Show another (random) article

Suggestions for corrections and ideas for articles are welcomed : Get in touch!


Further resources :

Do NOT follow this link or you will be banned from the site!

DOKUWIKI IMPLEMENTATION DESIGN BY UNIV.ORG.UK MAY 2024