Characterization and assessment of potential environmental risk of tailings stored in seven impoundments in the Aries river basin, Western Romania

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)							±

ISSN: 2661-801X