Table 2.

Mineralogical composition of tailings

Mineral group	Mineral species	Chemical formula	Impoundment
			Saliste	Gura Rosiei	Stefanca	Sesei	Cutii	Sartas	Brazesti
oxides	quartz	SiO2	++	++	++	++	++	+	++
silicates	albite	NaAlSi3O8	++		+	+			++
	muscovite	KAl2(Si3Al)O10(OH,F)2				+	+	++	+
	orthoclase	AlKSi3O8	++	++			+
	biotite	NaFeKMgTiSi3O12		+	+		±	++
	feldspar	Al2CaSr O8Si2			±				+
	anorthoclase	AlCaKNaO8Si3	±		++	++		+
sulphides	chalcopyrite	CuFeS2			±		±	±	±
	pyrite	FeS2	±				±	±
	pyrrhotite	Fe9S10		±			±		±
	sphalerite	ZnS						±
	galena	PbS					±	±	±
sulphates	jarosite	KFe3(SO4)2(OH)6					±	+
	iron sulphate	Fe2(SO4)3			+	+
	gypsum	CaSO4					±	+
	anglesite	PbSO4					±	±
carbonates	eitelite	Na2Mg(CO3)2			±				+
	baritocalcite	BaCa(CO3)2			+	±
	calcite	CaCO3			±	±			+
	rhodochrosite	MnCO3						±
	dolomite	CaMg(CO3)2		+					+
arsenic minerals	wilhelmkleinite	As2Fe2Zn O8(OH)2		±	±				±
	potassium hydroxo pentafluoro arsenate	AsF5K(OH)							±

(++) - major (20–50%); (+) - minor (5–20%); (±) - trace (<5%).