ON THE ORIGIN OF CHLORIDE WATERS IN THE POLISH FLYSCH CARPATHIANS
Journal Title: Biuletyn Państwowego Instytutu Geologicznego - Year 2010, Vol 441, Issue 441
Abstract
Chloride waters in the Polish Flysch Carpathians are remnants of marine sedimentation water which was chemically and isotopically changed due to ultrafiltration and the release of dehydration water (diagenetic water) during the burial diagenesis of clay minerals. In the western part of the study area, the diagenetic end-member is characterized by δ[sup]18[/sup]O and δ[sup]2[/sup]H values of about +6.5 and –30.0‰, respectively, and Cl– content in the range of 3.8 and 13.8 g/dm[sup]3[/sup]. In some fault areas, such waters migrate to the surface and mix with local meteoric waters as indicated by mixing lines in δ[sup]18[/sup]O–δ[sup]2[/sup]H and δ[sup]18[/sup]O–Cl– graphs. In several wells of the eastern part, waters containing a significant proportion of marine water occur. However, in majority of deep wells, mixtures of diagenetic and meteoric waters of Quaternary and pre-Quaternary climates are present, as deduced from δ[sup]18[/sup]O–Cl– linear relations. In most cases, they do not exhibit linear relations also expected in δ[sup]18[/sup]O–δ[sup]2[/sup]H graphs due to the shifts of δ[sup]2[/sup]H to heavier isotopic values supposedly caused by involvement of water in the generation of hydrocarbons.
Authors and Affiliations
Andrzej ZUBER, Józef CHOWANIEC, Maciej BOROWIEC
Keywords
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