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Recent Evaporites

  1. Peter Sonnenfeld and
  2. J.-P. Perthuisot
  1. J. - P. Perthuisot

Published Online: 21 MAR 2013

DOI: 10.1002/9781118667545.ch2

Brines and Evaporites

Brines and Evaporites

How to Cite

Sonnenfeld, P. and Perthuisot, J.-P. (1989) Recent Evaporites, in Brines and Evaporites, American Geophysical Union, Washington, D. C.. doi: 10.1002/9781118667545.ch2

Author Information

  1. Laboratory of Biogeology and Biostratigraphy, University of Nantes 2 Rue de la Houssiniere, F-44072 Nantes Cedex 03.

Publication History

  1. Published Online: 21 MAR 2013
  2. Published Print: 1 JAN 1989

ISBN Information

Print ISBN: 9780875907079

Online ISBN: 9781118667545

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Summary

Severalm oderne vaporited epositsw ere analyzed,from both continental and paraalic settings.

The present survey brings out some essential characteristics of salt bearing sequences as well as of the conditions of evaporite sedimentation:

1. evaporites edimentatioonc cursw hens alinew atersa re exposedto arid conditions and are restricted in their communication with a larger water body.

2. a fundamental distinction must be made between “capillary” evaporites grown within a pre-existingse diment, and “open water” evaporitesd eposited under subaqueous conditions. The latter form by far the thickest deposits at present.

3. salinity fields control the lateral segregation of precipitatings alts. The lithological units of a saline series are thus bound to be diachronous.

4. the stratification of waters in deep basins favors the accumulation of dissolved salts.The sorting of salts with depth produces a concentric pattern of facies units.

5. evaporitica nd especiallyp re-evaporiticb asinsa re favored to produce,trap and conserve organic matter.

A comparisobne tweenp resents, mall, rare, and unstablee vaporited epositsa nd the extraordinarilye xtensives alt sequenceosf the past questions how representative our times are with regard to evaporites