A Review of the Hydrochemistry of a Deep Sedimentary Aquifer and Its Consequences for Geothermal Operation: Klaipeda, Lithuania

Table 2

Minerals identified (by X-ray diffraction) in core material recovered from reservoir depth in the Klaipeda 1I sidetrack (samples designated KLA1I) and from the deep boreholes Palanga-318 (PAL) and Vydmantai-1 (VID). The figures forming the latter part of the sample number indicate depths in m.

(a)

Core sample	KLA 1I A	KLA 1I B	PAL 875	PAL 896.5	PAL 936	PAL 970	PAL 975.5	PAL 990	VID 903.3
Lithology			Red-grey sandstone	Reddish clay	Reddish-grey sandstone	Grey siltstone	Grey-red sandstone	Grey-green sandstone	Grey-white clay
Minerals	Calcite	Quartz	Quartz	Quartz	Quartz	Quartz	Quartz	Quartz	Quartz
	Pyrite	Dolomite	MnS	Muscovite	MnS	Magnetite	MnS	Dolomite	Biotite
	MnS	Calcite		Biotite		MnS	Calcite	MnS	Kaolinite
	Orthoclase			Kaolinite		Kaolinite		Kaolinite	MnS
	Quartz			MnS		Biotite
				Hematite		Illite

(b)

Core sample	VID 913.5	VID 944.9	VID 954.4	VID 958.5	VID 962.5	VID 964	VID 971	VID 972	VID 980
Lithology	Grey-green clay	White clay	Grey clay	Grey-green clay	Reddish clay	Reddish clay	Grey sandstone with clay	Grey clay	White clay
Minerals	Quartz	Quartz	Quartz	Quartz	Quartz	Quartz	Quartz	Quartz	Quartz
	Illite	Calcite	Biotite	Kaolinite	Hematite	MnS	Biotite	Biotite	MnS
	Kaolinite	MnS	Kaolinite	Illite	Illite	Illite	Kaolinite	MnS	Kaolinite
	Muscovite		MnS	Biotite	Kaolinite	Chlorite
	MnS			Chlorite	Chlorite
					Muscovite