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The AAPG/Datapages Combined Publications Database

Journal of Petroleum Geology

Abstract

Journal of Petroleum Geology, Vol.1, No.2, pp. 83-94, 1978

©Copyright 2000 Scientific Press, Ltd.

EARLY DIAGENESIS AND THE PRESERVATION OF POROSITY IN JURASSIC LIMESTONES

Bruce H. Purser*

*Dept. des Sciences de la Terre, Bâtiment 505, Faculté des Sciences, Université de Paris XI, 91405 ORSAY, France.

Abstract

The study of Quaternary sediments has shown that carbonates are susceptible to early lithification, or to dissolution, in many different environments. Most of these surface effects, although reducing primary porosity, rarely destroy it completely. Although similar diagenetic phenomena also occur in ancient rocks, the great majority of limestones do not exhibit early diagenetic fabrics; much sparitic cement is possibly related to carbonate liberated by pressure-solution within the limestone mass.

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