Geochemistry of natural waters of the Baydar valley (Crimean Peninsula)

摘要

The paper discusses the pioneering results of comprehensive hydrogeochemical studies of natural waters of the Baydar valley (southwestern parts of the Crimean Peninsula), whose major aquifers are confined to the upper Jurassic sediments (karst limestone) representing the most important hydrogeological feature of the study area. Fresh and ultra-fresh waters of predominantly bicarbonate calcium composition with total mineralization in the range from 194 to 1137 mg/dm~(3)are most widespread in the region. The analyzed waters (surface, ground and artesian) differ significantly in chemical composition and their basic characteristics have been arranged in the following patterns: mineralization of 254-832 mg/dm~(3)and neutral pH (6.98-7.54) for artesian waters ; higher mineralization level (up to 1137 mg/dm~(3)) and wide variations of pH values (from 7.18 to 8.31) for ground waters ; mineralization from 194 to 288 mg/dm~(3)and a slightly alkaline pH (between 8.02 and 8.04) for surface waters collected in the Chyornaya river basin and Chernorechensk reservoir. The studied waters display a unique spectrum of trace elements and REE distribution.