Study of the Characteristics of Mass Transfer During the Ore-forming Process of High-grade Iron Ore in the Gongchangling Iron Deposit, Liaoning

doi:10.19657/j.geoscience.1000-8527.2023.120

Abstract

Abstract:

As the largest and the only BIF-hosted high-grade magnetite iron orebody with industrial mining value in China, the metallogeny of the Gongchangling iron ore is still controversial.In this study, we collected typical BIF and high-grade ore samples from the No.4 iron ore layer and analyzed their chemical compositions.Consequently, we determined the elemental changes during the formation of high-grade iron ore using mass balance calculations, and therefore the following conclusions are received.For the major elements, Fe₂O₃ is strongly enriched, however, SiO₂ is depleted, accompanying with the migration of alkali and alkaline elements (e.g., Na, K, Ca and Mg), which are more active in geochemical mobilization properties.P₂O₅, BaO, and Cr₂O₃ are relatively less enriched, and this is probably related to the hydrothermal fluids which contributes to the formation of the high-grade iron ore; For trace elements, some high field strength elements (HFSE), such as Nb, Ta, and U are enriched, whereas Ce, Th, and Zr are depleted, and Hf and Ti remain unchanged; In terms of some large ion lithophile elements (LILE), Ba and Cs are enriched, however, Rb and Sr are depleted.This suggests that the Nb-Ta mobilization in both high-grade iron ore and the altered rocks are caused by the same geological event; For rare earth elements (REE), the light REE (e.g., La, Ce, Pr and Nd) are distinctly depleted, whereas, the heavy REE are enriched.In summary, the genesis of the Gongchangling high-grade iron ore is probably related to the granitic magmatic events.

Key words: BIF-hosted high-grade iron ore, elemental mass transfer, mass balance calculation, genesis of high-grade iron ore, Gongchangling

CLC Number:

P611

HOU Tingting, YAO Yuzeng, FU Jianfei, LIU Jing, ZHANG Yongli, GUO Rongrong. Study of the Characteristics of Mass Transfer During the Ore-forming Process of High-grade Iron Ore in the Gongchangling Iron Deposit, Liaoning[J]. Geoscience, 2024, 38(01): 56-67.

Figures/Tables 10

References 64

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矿石类型	样品编号	Al₂O₃				BaO			CaO			Cr₂O₃			TFe₂O₃			K₂O				MgO			MnO			Na₂O			P₂O₅				SiO₂				SrO			总量
贫铁矿	GCL-1	0.80				0.02			3.29			0.02			46.08			0.06				2.68			0.20			0.10			0.08				47.07				0.01			99.56
	GCL-2	0.61				0.02			4.88			0.02			44.52			0.05				3.20			0.22			0.09			0.09				45.64				0.01			99.64
	GCL-3	0.38				0.02			3.93			0.01			39.07			0.04				1.72			0.15			0.06			0.07				53.46				0.01			99.23
平均值		0.60				0.02			4.03			0.02			43.22			0.05				2.53			0.19			0.08			0.08				48.72				0.01			99.48
	GCL-4	0.34				0.03			0.80			0.02			97.05			0.03				0.42			0.03			0.05			0.02				0.81				0.01			99.96
富铁矿	GCL-5	0.12				0.03			0.38			0.02			99.89			0.04				0.23			0.04			0.04			0.26				0.86				0.01			99.06
	GCL-6	0.53				0.03			0.03			0.02			98.61			0.03				0.45			0.06			0.05			0.00				3.19				0.01			100.2
	GCL-7	0.59				0.03			0.35			0.03			98.96			0.04				0.86			0.04			0.05			0.26				1.58				0.01			100.2
平均值		0.40				0.03			0.39			0.02			98.63			0.04				0.49			0.04			0.05			0.14				1.61				0.01			99.85
矿石类型	样品编号		Ag	As			Be			Bi			Ce			Cs			Cu		Ga			Ge			Hf			In			Li			Mn		Mo			Nb			Ni
贫铁矿	GCL-1		0.01	NA			2.93			0.09			12.45			0.88			2.00		2.29			0.06			0.10			NA			1.4			1520.0		1.90			1.00			2.60
	GCL-2		0.02	0.70			1.22			0.12			1.66			1.68			8.30		4.22			0.05			0.10			0.01			1.7			1700.0		0.66			0.50			3.50
	GCL-3		0.01	0.70			1.69			0.13			7.95			0.57			6.00		2.39			0.05			0.10			NA			0.7			1120.0		0.80			0.50			2.10
平均值			0.01	0.70			1.95			0.11			7.35			1.04			5.43		2.97			0.05			0.10			NA			1.3			1446.7		1.10			0.67			2.73
	GCL-4		0.01	0.60			1.02			0.12			2.73			NA			1.00		2.48			0.10			NA			NA			2.8			172.00		0.60			0.80			7.40
富铁矿	GCL-5		0.01	NA			1.41			0.09			0.95			0.43			2.00		1.55			2.49			0.10			0.01			1.6			103.00		0.40			0.50			155.50
	GCL-6		0.01	0.60			0.46			0.03			0.03			0.05			0.50		3.12			1.70			NA			0.01			4.8			349.00		0.20			1.40			6.80
	GCL-7		0.17	NA			0.76			0.60			0.60			0.54			2.40		2.70			4.44			0.10			0.01			5.1			183.00		0.80			0.60			144.50
平均值			0.05	0.60			0.91			0.21			0.21			0.34			1.48		2.46			2.18			0.10			0.01			3.6			201.75		0.50			0.80			78.55
矿石类型	样品编号		P	Pb			Rb			S			Sb			Se			Sn		Sr			Ta			Th			Ti			U			V		W			Zn			Zr
贫铁矿	GCL-1		350.00	0.80			3.1			0.05			0.13			1.00			0.40		7.10			0.08			2.20			0.01			0.40			4.00		0.50			7.00			3.60
	GCL-2		390.00	0.80			5.0			0.13			0.10			1.00			0.40		10.50			NA			0.30			0.01			1.70			4.00		0.30			9.00			4.20
	GCL-3		320.00	1.00			2.2			0.27			0.11			1.00			0.20		16.00			0.08			0.60			0.01			0.50			3.00		0.30			4.00			2.90
平均值			353.33	0.87			3.4			0.15			0.11			1.00			0.33		11.20			0.08			1.03			0.01			0.87			3.67		0.37			6.67			3.57
	GCL-4		110.00	5.60			0.2			NA			0.98			1.00			0.90		8.90			1.00			0.20			NA			22.80			11.00		15.90			3.00			0.70
富铁矿	GCL-5		1070.0	1.00			2.2			NA			NA			1.00			1.00		4.50			NA			NA			NA			0.20			40.00		6.60			NA			NA
	GCL-6		20.00	0.80			0.3			NA			0.07			NA			1.20		1.00			0.11			NA			0.01			1.10			21.00		0.20			15.00			1.00
	GCL-7		1130.0	11.8			3.3			NA			NA			1.00			0.90		3.80			0.06			0.30			0.01			0.30			39.00		6.80			4.00			1.50
平均值			582.50	4.80			1.5			NA			0.53			1.00			1.00		4.55			0.39			0.25			0.01			6.10			27.75		7.38			7.33			1.07
矿石类型	样品编号		La		Ce			Pr			Nd			Sm			Eu			Gd			Tb			Dy			Ho			Er		Tm			Yb			Lu			Y
贫铁矿	GCL-1		9.70		13.60			1.31			4.10			0.61			0.35			0.55			0.10			0.62			0.14			0.37		0.06			0.40			0.07			5.20
	GCL-2		0.90		1.80			0.27			1.20			0.39			0.13			0.41			0.08			0.55			0.14			0.43		0.06			0.36			0.06			4.90
	GCL-3		5.90		8.50			0.85			3.00			0.47			0.19			0.47			0.09			0.54			0.12			0.40		0.06			0.37			0.07			4.80
平均值			5.50		7.97			0.81			2.77			0.49			0.22			0.48			0.09			0.57			0.13			0.40		0.06			0.38			0.07			4.97
	GCL-4		2.20		3.00			0.34			1.50			0.31			0.39			0.56			0.12			1.02			0.27			0.81		0.13			0.85			0.14			12.50
富铁矿	GCL-5		0.50		1.10			0.24			1.90			0.86			0.34			1.24			0.20			1.24			0.27			0.88		0.11			0.68			0.09			11.10
	GCL-6		0.80		1.30			0.16			0.60			0.17			0.09			0.22			0.05			0.34			0.10			0.31		0.04			0.26			0.05			3.80
	GCL-7		0.60		1.10			0.23			1.00			0.43			0.16			0.55			0.09			0.55			0.13			0.42		0.06			0.32			0.06			4.50
平均值			1.03		1.63			0.24			1.25			0.44			0.25			0.64			0.12			0.79			0.19			0.61		0.09			0.53			0.09			7.98

矿石类型	样品编号	Al₂O₃				BaO			CaO			Cr₂O₃			TFe₂O₃			K₂O				MgO			MnO			Na₂O			P₂O₅				SiO₂				SrO			总量
贫铁矿	GCL-1	0.80				0.02			3.29			0.02			46.08			0.06				2.68			0.20			0.10			0.08				47.07				0.01			99.56
	GCL-2	0.61				0.02			4.88			0.02			44.52			0.05				3.20			0.22			0.09			0.09				45.64				0.01			99.64
	GCL-3	0.38				0.02			3.93			0.01			39.07			0.04				1.72			0.15			0.06			0.07				53.46				0.01			99.23
平均值		0.60				0.02			4.03			0.02			43.22			0.05				2.53			0.19			0.08			0.08				48.72				0.01			99.48
	GCL-4	0.34				0.03			0.80			0.02			97.05			0.03				0.42			0.03			0.05			0.02				0.81				0.01			99.96
富铁矿	GCL-5	0.12				0.03			0.38			0.02			99.89			0.04				0.23			0.04			0.04			0.26				0.86				0.01			99.06
	GCL-6	0.53				0.03			0.03			0.02			98.61			0.03				0.45			0.06			0.05			0.00				3.19				0.01			100.2
	GCL-7	0.59				0.03			0.35			0.03			98.96			0.04				0.86			0.04			0.05			0.26				1.58				0.01			100.2
平均值		0.40				0.03			0.39			0.02			98.63			0.04				0.49			0.04			0.05			0.14				1.61				0.01			99.85
矿石类型	样品编号		Ag	As			Be			Bi			Ce			Cs			Cu		Ga			Ge			Hf			In			Li			Mn		Mo			Nb			Ni
贫铁矿	GCL-1		0.01	NA			2.93			0.09			12.45			0.88			2.00		2.29			0.06			0.10			NA			1.4			1520.0		1.90			1.00			2.60
	GCL-2		0.02	0.70			1.22			0.12			1.66			1.68			8.30		4.22			0.05			0.10			0.01			1.7			1700.0		0.66			0.50			3.50
	GCL-3		0.01	0.70			1.69			0.13			7.95			0.57			6.00		2.39			0.05			0.10			NA			0.7			1120.0		0.80			0.50			2.10
平均值			0.01	0.70			1.95			0.11			7.35			1.04			5.43		2.97			0.05			0.10			NA			1.3			1446.7		1.10			0.67			2.73
	GCL-4		0.01	0.60			1.02			0.12			2.73			NA			1.00		2.48			0.10			NA			NA			2.8			172.00		0.60			0.80			7.40
富铁矿	GCL-5		0.01	NA			1.41			0.09			0.95			0.43			2.00		1.55			2.49			0.10			0.01			1.6			103.00		0.40			0.50			155.50
	GCL-6		0.01	0.60			0.46			0.03			0.03			0.05			0.50		3.12			1.70			NA			0.01			4.8			349.00		0.20			1.40			6.80
	GCL-7		0.17	NA			0.76			0.60			0.60			0.54			2.40		2.70			4.44			0.10			0.01			5.1			183.00		0.80			0.60			144.50
平均值			0.05	0.60			0.91			0.21			0.21			0.34			1.48		2.46			2.18			0.10			0.01			3.6			201.75		0.50			0.80			78.55
矿石类型	样品编号		P	Pb			Rb			S			Sb			Se			Sn		Sr			Ta			Th			Ti			U			V		W			Zn			Zr
贫铁矿	GCL-1		350.00	0.80			3.1			0.05			0.13			1.00			0.40		7.10			0.08			2.20			0.01			0.40			4.00		0.50			7.00			3.60
	GCL-2		390.00	0.80			5.0			0.13			0.10			1.00			0.40		10.50			NA			0.30			0.01			1.70			4.00		0.30			9.00			4.20
	GCL-3		320.00	1.00			2.2			0.27			0.11			1.00			0.20		16.00			0.08			0.60			0.01			0.50			3.00		0.30			4.00			2.90
平均值			353.33	0.87			3.4			0.15			0.11			1.00			0.33		11.20			0.08			1.03			0.01			0.87			3.67		0.37			6.67			3.57
	GCL-4		110.00	5.60			0.2			NA			0.98			1.00			0.90		8.90			1.00			0.20			NA			22.80			11.00		15.90			3.00			0.70
富铁矿	GCL-5		1070.0	1.00			2.2			NA			NA			1.00			1.00		4.50			NA			NA			NA			0.20			40.00		6.60			NA			NA
	GCL-6		20.00	0.80			0.3			NA			0.07			NA			1.20		1.00			0.11			NA			0.01			1.10			21.00		0.20			15.00			1.00
	GCL-7		1130.0	11.8			3.3			NA			NA			1.00			0.90		3.80			0.06			0.30			0.01			0.30			39.00		6.80			4.00			1.50
平均值			582.50	4.80			1.5			NA			0.53			1.00			1.00		4.55			0.39			0.25			0.01			6.10			27.75		7.38			7.33			1.07
矿石类型	样品编号		La		Ce			Pr			Nd			Sm			Eu			Gd			Tb			Dy			Ho			Er		Tm			Yb			Lu			Y
贫铁矿	GCL-1		9.70		13.60			1.31			4.10			0.61			0.35			0.55			0.10			0.62			0.14			0.37		0.06			0.40			0.07			5.20
	GCL-2		0.90		1.80			0.27			1.20			0.39			0.13			0.41			0.08			0.55			0.14			0.43		0.06			0.36			0.06			4.90
	GCL-3		5.90		8.50			0.85			3.00			0.47			0.19			0.47			0.09			0.54			0.12			0.40		0.06			0.37			0.07			4.80
平均值			5.50		7.97			0.81			2.77			0.49			0.22			0.48			0.09			0.57			0.13			0.40		0.06			0.38			0.07			4.97
	GCL-4		2.20		3.00			0.34			1.50			0.31			0.39			0.56			0.12			1.02			0.27			0.81		0.13			0.85			0.14			12.50
富铁矿	GCL-5		0.50		1.10			0.24			1.90			0.86			0.34			1.24			0.20			1.24			0.27			0.88		0.11			0.68			0.09			11.10
	GCL-6		0.80		1.30			0.16			0.60			0.17			0.09			0.22			0.05			0.34			0.10			0.31		0.04			0.26			0.05			3.80
	GCL-7		0.60		1.10			0.23			1.00			0.43			0.16			0.55			0.09			0.55			0.13			0.42		0.06			0.32			0.06			4.50
平均值			1.03		1.63			0.24			1.25			0.44			0.25			0.64			0.12			0.79			0.19			0.61		0.09			0.53			0.09			7.98