Geochemical Characteristics,Tectonic Setting, and Mineralization of Magmatic Rocks in Gudui Area, Southern Tibet

doi:10.19657/j.geoscience.1000-8527.2022.062

Abstract

Abstract:

Many Au-Sb-Pb-Zn polymetallic deposits are developed in Gudui area of southern Tibet, which is located in the North Himalayan metallogenic belt. Magmatism in southern Tibet was likely intense in response to the India-Asia collision, and Mesozoic-Cenozoic magmatic rocks are widely exposed in Gudui area. Based on field investigation, we focused on the Indosinian-Yanshanian and Himalayan tectono-magmatic activities, and described the spatial distribution characteristics and age of local magmatic rocks. We analyzed the characteristics of major, trace, and rare earth elements of typical intrusive and volcanic rocks, and discussed the tectonic setting and petrogenesis of these magmatic rocks. We concluded that the magmatism at Gudui area provided the initial heat source and drove the transport of ore-forming material. Upwelling of the mantle-derived hydrothermal fluids and the intrusion of the intermediate-felsic sub-volcanic rocks may have caused dynamic metasomatism and concentrated various ore-forming elements into the ore fluid, and then migrated and precipitated them along near EW-trending major faults and near NS-trending secondary faults to form the ore deposits. This study provides a new idea for exploring the relationship between the tectono-magmatic evolution and mineralization at Gudui area, which may also be applicable for the whole southern Tibet. Moreover, we provide fundamental geological data to establish new and accurate metallogenic models and ore prospecting patterns for the region.

Key words: magmatic rock, lithogeochemical characteristic, tectonic environment, magmatism and metallogeny, Gudui area, southern Tibet

CLC Number:

P581
P595

LOU Yuanlin, CHENG Ming, TANG Yao, ZHANG Chaoming, LAN Jingzhou, YUAN Yongsheng, YANG Tao. Geochemical Characteristics,Tectonic Setting, and Mineralization of Magmatic Rocks in Gudui Area, Southern Tibet[J]. Geoscience, 2023, 37(02): 353-374.

Figures/Tables 10

References 54

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样品类型	样品时代	采样位置	岩性(个数)
侵入岩	早白垩世	江拉、哲古	辉长岩(5),辉绿岩(2),闪长岩(1)
侵入岩	始新世	达拉、恰嘎	绢英岩化斑状花岗岩(2),斑状花岗岩(1),斑状二长花岗岩(1)
火山岩	晚三叠世	拉九	玄武岩(3)
	中侏罗世	古堆、杀渔朗	玄武岩(2),英安岩(6)
	晚侏罗世—早白垩世	夏瓦	玄武岩(5)
脉岩	侏罗纪	古堆、恰嘎	煌斑岩(8)

样品类型	样品时代	采样位置	岩性(个数)
侵入岩	早白垩世	江拉、哲古	辉长岩(5),辉绿岩(2),闪长岩(1)
侵入岩	始新世	达拉、恰嘎	绢英岩化斑状花岗岩(2),斑状花岗岩(1),斑状二长花岗岩(1)
火山岩	晚三叠世	拉九	玄武岩(3)
	中侏罗世	古堆、杀渔朗	玄武岩(2),英安岩(6)
	晚侏罗世—早白垩世	夏瓦	玄武岩(5)
脉岩	侏罗纪	古堆、恰嘎	煌斑岩(8)

样品编号			岩性	SiO₂			TiO₂			Al₂O₃			Fe₂O₃			FeO			MnO			MgO			CaO			Na₂O			K₂O			P₂O₅			LOI			Total			K₂O+Na₂O						K₂O/Na₂O						Mg^#			A/CNK			AR			σ
PM4QY002			辉长岩	52.14			3.64			13.96			3.02			7.48			0.15			3.54			6.52			3.84			1.63			0.66			2.89			99.47			5.47						0.42						46.00			0.70			1.73			3.27
11PM101				49.85			2.93			14.68			3.24			8.59			0.17			3.53			7.51			3.82			1.37			0.53			2.69			98.91			5.19						0.36						42.52			0.69			1.61			3.93
11PM102				48.76			2.84			13.86			2.70			8.56			0.16			6.36			8.90			3.07			0.12			0.34			3.19			98.86			3.19						0.04						57.22			0.65			1.33			1.77
11PM301				49.18			4.13			14.36			2.32			8.91			0.15			4.48			6.79			4.39			1.15			0.47			2.52			98.85			5.54						0.26						47.51			0.69			1.71			4.97
11PM302				48.14			2.51			12.88			2.92			8.14			0.17			3.63			6.66			2.83			0.91			0.51			9.66			98.96			3.74						0.32						44.53			0.73			1.47			2.72
11Q6			辉绿岩	51.70			2.42			14.36			2.12			7.95			0.16			5.33			7.65			2.74			1.44			0.29			2.02			98.18			4.18						0.53						54.69			0.72			1.47			2.01
11Q8			辉绿岩	50.61			2.22			15.34			1.86			7.34			0.15			5.42			8.50			2.46			1.31			0.26			2.49			97.96			3.77						0.53						57.07			0.73			1.38			1.87
11Q14			闪长岩	55.40			2.08			13.13			2.98			7.79			0.14			2.54			5.30			2.80			2.66			0.86			2.40			98.08			5.46						0.95						36.98			0.77			1.84			2.40
QM3			恰嘎花岗岩	74.91			0.05			15.08			0.56			0.19			0.02			0.14			0.99			3.86			2.32			0.10			1.91			100.12			6.18						0.60						—			1.41			2.25			1.20
QM4			恰嘎花岗岩	71.85			0.28			15.30			1.89			1.00			0.03			0.88			2.45			3.24			3.08			0.13			0.70			100.83			6.32						0.95						—			1.17			2.11			1.38
QM2			达拉花岗岩	75.39			0.07			14.61			0.55			0.26			0.02			0.19			0.97			3.59			2.38			0.07			2.10			100.19			5.97						0.66						—			1.43			2.24			1.10
Q7			达拉花岗岩	68.17			0.28			16.27			0.38			1.39			0.05			0.87			2.83			3.93			3.01			0.10			1.91			99.19			6.94						0.77						—			1.09			2.14			1.91
样品编号			岩性	Cr			Ni			Co			V			Rb			Sr			Ba			Sc			Nb			Ta			Li			Zr			Hf			U			Th			W			Sn			Cu			Pb			Zn			Au
PM4QY002			辉长岩	12.20			17.60			40.80			237.8			22.2			441.6			433.0			19.60			61.70			3.54			17.2			914.8			12.80			1.06			3.64			0.68			8.30			27.00			13.8			119.8			<0.10
11PM101				37.50			18.10			24.20			139.7			125.3			128.9			501.5			17.60			27.20			1.69			39.8			387.8			10.20			2.43			23.60			2.64			3.74			11.40			26.0			99.7			0
11PM102				132.60			49.60			45.50			271.4			5.0			121.7			155.7			26.80			18.20			0.97			35.7			332.1			5.40			0.28			1.40			0.91			3.92			20.10			5.7			100.9			0
11PM301				18.80			18.70			52.20			312.0			20.4			183.8			205.8			23.60			42.00			2.54			31.5			598.3			6.80			0.69			3.00			0.62			2.35			18.80			13.7			103.0			0
11PM302				11.80			2.00			36.50			256.4			26.1			127.3			201.8			16.70			29.20			1.45			74.1			175.3			7.30			0.43			4.87			0.41			5.00			6.00			20.9			110.5			0.07
11Q6			辉绿岩	131.70			20.30			43.80			273.2			50.3			394.3			355.4			26.30			26.40			0.72			36.9			273.6			07.21			0.61			5.80			2.11			2.82			—			21.7			100.5			0.82
11Q8			辉绿岩	115.80			24.00			41.67			257.3			49.9			412.3			279.4			25.40			28.60			0.63			25.7			216.3			10.80			0.81			5.61			1.59			2.07			—			24.8			95.4			0.88
11Q14			闪长岩	102.10			1.68			35.40			140.5			69.3			448.6			516.0			18.90			35.30			1.81			26.1			603.5			28.10			1.46			6.01			1.26			3.52			—			21.5			158.3			0.95
QM3			恰嘎花岗岩	2.52			0.92			04.94			025.6			237.5			114.3			044.0			06.90			07.21			1.45			101.5			100.5			05.04			7.43			6.80			48.10			19.80			2.72			126.8			31.3			0.70
QM4			恰嘎花岗岩	6.22			4.39			15.10			042.1			164.8			352.2			473.9			08.61			09.44			1.27			059.3			019.0			00.82			1.48			12.70			146.00			3.66			4.27			60.0			58.9			0.60
QM2			达拉花岗岩	2.56			1.57			3.09			020.2			213.2			050.4			034.0			11.0			06.55			1.49			054.5			092.8			04.63			5.82			03.91			28.30			20.30			1.59			126.5			35.6			1.35
Q7			达拉花岗岩	—			—			—			—			149.8			373.0			483.4			—			07.96			0.15			—			092.3			03.91			1.79			11.60			—			—			—			47.3			—			—
样品编号			岩性	Y		La			Ce			Pr			Nd			Sm			Eu			Gd		Tb				Dy		Ho			Er				Tm			Yb			Lu			ΣREE		LREE			HREE			LREE/ HREE			La_N/ Yb_N			Eu^*				Ce^*
PM4QY002			辉长岩	48.98		57.72			119.20			15.94			75.72			14.45			4.45			11.96		2.08				10.39		2.04			5.38				0.73			4.74			0.69			325.49		287.48			38.01			7.56			8.73			1.03				0.96
11PM101				34.71		10.69			44.51			6.37			32.31			7.58			2.43			6.68		1.37				7.13		1.47			3.76				0.52			3.23			0.48			128.53		103.89			24.64			4.22			2.37			1.04				1.32
11PM102				35.19		38.74			94.78			13.70			69.13			13.58			5.85			11.28		1.90				8.67		1.59			3.70				0.41			2.28			0.31			265.92		235.78			30.14			7.82			12.19			1.45				1.01
11PM301				36.53		24.02			65.64			9.15			45.03			9.56			3.32			8.25		1.53				7.69		1.57			4.02				0.55			3.38			0.49			184.20		156.72			27.48			5.70			5.10			1.14				1.09
11PM302				42.41		37.03			85.91			11.56			54.38			11.13			3.19			9.64		1.83				9.14		1.83			4.76				0.64			3.73			0.54			235.31		203.20			32.11			6.33			7.12			0.94				1.02
样品编号	岩性	Y			La			Ce			Pr			Nd			Sm			Eu			Gd				Tb		Dy				Ho			Er		Tm			Yb			Lu			ΣREE				LREE			HREE			LREE/ HREE			La_N/ Yb_N			Eu^*		Ce^*
11Q6	辉绿岩	55.17			37.34			78.77			10.23			43.64			10.34			4.38			9.35				1.72		10.39				2.05			5.45		0.86			5.05			0.74			220.31				184.70			35.61			5.19			5.30			1.36		0.99
11Q8	辉绿岩	49.69			32.84			68.17			8.78			37.50			8.86			3.86			8.17				1.49		9.08				1.83			4.91		0.79			4.63			0.72			191.63				160.01			31.62			5.06			5.09			1.39		0.98
11Q14	闪长岩	91.36			81.52			204.60			22.63			97.61			22.92			10.08			19.68				3.15		18.80				3.34			9.20		1.43			8.93			1.39			505.28				439.36			65.92			6.67			6.55			1.45		1.17
QM3	恰嘎花岗岩	9.42			11.16			22.73			2.51			9.08			2.71			0.37			2.30				0.39		1.76				0.29			0.66		0.10			0.54			0.08			54.68				48.56			6.12			7.94			14.82			0.45		1.05
QM4	恰嘎花岗岩	6.53			33.03			64.14			7.25			27.21			4.95			1.25			3.66				0.40		1.59				0.26			0.62		0.09			0.36			0.05			144.86				137.83			7.03			19.62			65.81			0.90		1.02
QM2	达拉花岗岩	5.96			4.68			10.45			1.27			4.06			1.46			0.33			1.41				0.27		1.33				0.21			0.59		0.08			0.49			0.06			26.70				22.25			4.45			5.01			6.85			0.70		1.05
Q7	达拉花岗岩	8.12			36.50			71.10			7.81			29.06			5.73			1.74			4.22				0.46		1.75				0.27			0.72		0.22			0.41			0.25			160.24				151.94			8.30			18.31			63.86			1.08		1.03

样品编号			岩性	SiO₂			TiO₂			Al₂O₃			Fe₂O₃			FeO			MnO			MgO			CaO			Na₂O			K₂O			P₂O₅			LOI			Total			K₂O+Na₂O						K₂O/Na₂O						Mg^#			A/CNK			AR			σ
PM4QY002			辉长岩	52.14			3.64			13.96			3.02			7.48			0.15			3.54			6.52			3.84			1.63			0.66			2.89			99.47			5.47						0.42						46.00			0.70			1.73			3.27
11PM101				49.85			2.93			14.68			3.24			8.59			0.17			3.53			7.51			3.82			1.37			0.53			2.69			98.91			5.19						0.36						42.52			0.69			1.61			3.93
11PM102				48.76			2.84			13.86			2.70			8.56			0.16			6.36			8.90			3.07			0.12			0.34			3.19			98.86			3.19						0.04						57.22			0.65			1.33			1.77
11PM301				49.18			4.13			14.36			2.32			8.91			0.15			4.48			6.79			4.39			1.15			0.47			2.52			98.85			5.54						0.26						47.51			0.69			1.71			4.97
11PM302				48.14			2.51			12.88			2.92			8.14			0.17			3.63			6.66			2.83			0.91			0.51			9.66			98.96			3.74						0.32						44.53			0.73			1.47			2.72
11Q6			辉绿岩	51.70			2.42			14.36			2.12			7.95			0.16			5.33			7.65			2.74			1.44			0.29			2.02			98.18			4.18						0.53						54.69			0.72			1.47			2.01
11Q8			辉绿岩	50.61			2.22			15.34			1.86			7.34			0.15			5.42			8.50			2.46			1.31			0.26			2.49			97.96			3.77						0.53						57.07			0.73			1.38			1.87
11Q14			闪长岩	55.40			2.08			13.13			2.98			7.79			0.14			2.54			5.30			2.80			2.66			0.86			2.40			98.08			5.46						0.95						36.98			0.77			1.84			2.40
QM3			恰嘎花岗岩	74.91			0.05			15.08			0.56			0.19			0.02			0.14			0.99			3.86			2.32			0.10			1.91			100.12			6.18						0.60						—			1.41			2.25			1.20
QM4			恰嘎花岗岩	71.85			0.28			15.30			1.89			1.00			0.03			0.88			2.45			3.24			3.08			0.13			0.70			100.83			6.32						0.95						—			1.17			2.11			1.38
QM2			达拉花岗岩	75.39			0.07			14.61			0.55			0.26			0.02			0.19			0.97			3.59			2.38			0.07			2.10			100.19			5.97						0.66						—			1.43			2.24			1.10
Q7			达拉花岗岩	68.17			0.28			16.27			0.38			1.39			0.05			0.87			2.83			3.93			3.01			0.10			1.91			99.19			6.94						0.77						—			1.09			2.14			1.91
样品编号			岩性	Cr			Ni			Co			V			Rb			Sr			Ba			Sc			Nb			Ta			Li			Zr			Hf			U			Th			W			Sn			Cu			Pb			Zn			Au
PM4QY002			辉长岩	12.20			17.60			40.80			237.8			22.2			441.6			433.0			19.60			61.70			3.54			17.2			914.8			12.80			1.06			3.64			0.68			8.30			27.00			13.8			119.8			<0.10
11PM101				37.50			18.10			24.20			139.7			125.3			128.9			501.5			17.60			27.20			1.69			39.8			387.8			10.20			2.43			23.60			2.64			3.74			11.40			26.0			99.7			0
11PM102				132.60			49.60			45.50			271.4			5.0			121.7			155.7			26.80			18.20			0.97			35.7			332.1			5.40			0.28			1.40			0.91			3.92			20.10			5.7			100.9			0
11PM301				18.80			18.70			52.20			312.0			20.4			183.8			205.8			23.60			42.00			2.54			31.5			598.3			6.80			0.69			3.00			0.62			2.35			18.80			13.7			103.0			0
11PM302				11.80			2.00			36.50			256.4			26.1			127.3			201.8			16.70			29.20			1.45			74.1			175.3			7.30			0.43			4.87			0.41			5.00			6.00			20.9			110.5			0.07
11Q6			辉绿岩	131.70			20.30			43.80			273.2			50.3			394.3			355.4			26.30			26.40			0.72			36.9			273.6			07.21			0.61			5.80			2.11			2.82			—			21.7			100.5			0.82
11Q8			辉绿岩	115.80			24.00			41.67			257.3			49.9			412.3			279.4			25.40			28.60			0.63			25.7			216.3			10.80			0.81			5.61			1.59			2.07			—			24.8			95.4			0.88
11Q14			闪长岩	102.10			1.68			35.40			140.5			69.3			448.6			516.0			18.90			35.30			1.81			26.1			603.5			28.10			1.46			6.01			1.26			3.52			—			21.5			158.3			0.95
QM3			恰嘎花岗岩	2.52			0.92			04.94			025.6			237.5			114.3			044.0			06.90			07.21			1.45			101.5			100.5			05.04			7.43			6.80			48.10			19.80			2.72			126.8			31.3			0.70
QM4			恰嘎花岗岩	6.22			4.39			15.10			042.1			164.8			352.2			473.9			08.61			09.44			1.27			059.3			019.0			00.82			1.48			12.70			146.00			3.66			4.27			60.0			58.9			0.60
QM2			达拉花岗岩	2.56			1.57			3.09			020.2			213.2			050.4			034.0			11.0			06.55			1.49			054.5			092.8			04.63			5.82			03.91			28.30			20.30			1.59			126.5			35.6			1.35
Q7			达拉花岗岩	—			—			—			—			149.8			373.0			483.4			—			07.96			0.15			—			092.3			03.91			1.79			11.60			—			—			—			47.3			—			—
样品编号			岩性	Y		La			Ce			Pr			Nd			Sm			Eu			Gd		Tb				Dy		Ho			Er				Tm			Yb			Lu			ΣREE		LREE			HREE			LREE/ HREE			La_N/ Yb_N			Eu^*				Ce^*
PM4QY002			辉长岩	48.98		57.72			119.20			15.94			75.72			14.45			4.45			11.96		2.08				10.39		2.04			5.38				0.73			4.74			0.69			325.49		287.48			38.01			7.56			8.73			1.03				0.96
11PM101				34.71		10.69			44.51			6.37			32.31			7.58			2.43			6.68		1.37				7.13		1.47			3.76				0.52			3.23			0.48			128.53		103.89			24.64			4.22			2.37			1.04				1.32
11PM102				35.19		38.74			94.78			13.70			69.13			13.58			5.85			11.28		1.90				8.67		1.59			3.70				0.41			2.28			0.31			265.92		235.78			30.14			7.82			12.19			1.45				1.01
11PM301				36.53		24.02			65.64			9.15			45.03			9.56			3.32			8.25		1.53				7.69		1.57			4.02				0.55			3.38			0.49			184.20		156.72			27.48			5.70			5.10			1.14				1.09
11PM302				42.41		37.03			85.91			11.56			54.38			11.13			3.19			9.64		1.83				9.14		1.83			4.76				0.64			3.73			0.54			235.31		203.20			32.11			6.33			7.12			0.94				1.02
样品编号	岩性	Y			La			Ce			Pr			Nd			Sm			Eu			Gd				Tb		Dy				Ho			Er		Tm			Yb			Lu			ΣREE				LREE			HREE			LREE/ HREE			La_N/ Yb_N			Eu^*		Ce^*
11Q6	辉绿岩	55.17			37.34			78.77			10.23			43.64			10.34			4.38			9.35				1.72		10.39				2.05			5.45		0.86			5.05			0.74			220.31				184.70			35.61			5.19			5.30			1.36		0.99
11Q8	辉绿岩	49.69			32.84			68.17			8.78			37.50			8.86			3.86			8.17				1.49		9.08				1.83			4.91		0.79			4.63			0.72			191.63				160.01			31.62			5.06			5.09			1.39		0.98
11Q14	闪长岩	91.36			81.52			204.60			22.63			97.61			22.92			10.08			19.68				3.15		18.80				3.34			9.20		1.43			8.93			1.39			505.28				439.36			65.92			6.67			6.55			1.45		1.17
QM3	恰嘎花岗岩	9.42			11.16			22.73			2.51			9.08			2.71			0.37			2.30				0.39		1.76				0.29			0.66		0.10			0.54			0.08			54.68				48.56			6.12			7.94			14.82			0.45		1.05
QM4	恰嘎花岗岩	6.53			33.03			64.14			7.25			27.21			4.95			1.25			3.66				0.40		1.59				0.26			0.62		0.09			0.36			0.05			144.86				137.83			7.03			19.62			65.81			0.90		1.02
QM2	达拉花岗岩	5.96			4.68			10.45			1.27			4.06			1.46			0.33			1.41				0.27		1.33				0.21			0.59		0.08			0.49			0.06			26.70				22.25			4.45			5.01			6.85			0.70		1.05
Q7	达拉花岗岩	8.12			36.50			71.10			7.81			29.06			5.73			1.74			4.22				0.46		1.75				0.27			0.72		0.22			0.41			0.25			160.24				151.94			8.30			18.31			63.86			1.08		1.03

样品编号		岩性				SiO₂			TiO₂				Al₂O₃			Fe₂O₃				FeO			MnO			MgO		CaO				Na₂O			K₂O				P₂O₅			LOI				Total			K₂O+Na₂O						K₂O/Na₂O						A/CNK					SI			AR		σ
PM12-2-Q		玄武岩				48.06			1.49				12.91			1.35				8.62			0.13			7.62		7.22				1.95			0.27				0.33			9.34				99.30			2.22						0.14						0.78					38.47			1.25		0.58
PM12-7-Q						47.70			1.77				12.70			1.37				8.16			0.18			7.39		7.97				1.60			0.34				0.31			9.81				99.29			1.94						0.21						0.73					39.18			1.21		0.46
PM12-13-Q						50.57			2.28				13.26			1.23				8.96			0.18			7.13		5.71				1.70			0.24				0.33			7.89				99.48			1.94						0.14						0.99					37.02			1.23		0.37
PM18-6-Q1		玄武岩				50.31			3.75				13.47			2.11				8.78			0.15			6.47		7.14				3.99			1.21				0.48			1.78				99.64			5.20						0.30						0.65					29.27			1.67		3.36
PM18-10-Q1		玄武岩				52.32			4.08				13.58			2.11				9.22			0.16			5.03		6.77				2.54			1.73				0.51			1.57				99.62			4.27						0.68						0.74					24.99			1.53		1.83
PM18-3-Q1		英安岩				70.16			0.89				13.17			1.38				3.08			0.06			1.38		1.09				3.28			2.99				0.32			1.89				99.69			6.27						0.91						1.24					11.48			2.57		1.43
PM18-4-Q1						70.55			0.81				13.32			1.42				2.90			0.06			1.29		1.02				3.01			3.29				0.31			1.76				99.74			6.30						1.09						1.29					10.90			2.45		1.43
PM18-7-Q1						69.22			0.82				12.82			2.48				3.28			0.09			1.45		1.36				1.97			3.47				0.29			2.33				99.58			5.44						1.76						1.35					11.51			1.77		1.11
PM18-8-Q1						68.68			0.92				13.27			1.83				3.78			0.08			1.63		1.21				4.53			1.29				0.32			2.15				99.69			5.82						0.28						1.20					12.58			2.34		1.30
PM18-9-Q1						72.45			0.64				12.59			0.63				2.74			0.05			1.14		1.10				1.65			4.85				0.33			1.48				99.65			6.50						2.94						1.26					10.45			2.81		1.42
PM18-11-Q1						68.37			0.77				14.20			1.40				4.06			0.06			1.50		0.82				4.24			1.97				0.32			2.05				99.76			6.21						0.46						1.34					11.51			2.41		1.50
PM1-100		玄武岩				49.36			4.57				13.11			6.76				6.17			0.19			4.51		6.11				3.91			2.21				0.64			1.22				98.76			6.12						0.57						0.66					19.26			1.93		5.18
PM1-101						49.47			4.98				12.93			5.11				8.10			0.19			5.08		5.99				3.33			0.83				0.41			2.36				98.78			4.16						0.25						0.75					22.64			1.56		2.24
PM22-102						52.84			3.92				12.51			3.64				7.65			0.16			5.56		5.29				4.54			0.28				0.45			2.07				98.91			4.82						0.06						0.72					25.66			1.74		2.14
PM22-103						51.68			3.91				13.52			3.50				6.20			0.14			5.07		7.68				2.93			1.10				0.57			2.42				98.72			4.03						0.38						0.68					26.97			1.47		1.64
PM22-104						53.32			4.00				15.63			5.74				0.96			0.11			2.92		4.22				5.17			1.64				0.61			3.27				97.59			6.81						0.32						0.87					18.07			2.04		3.85
样品编号	岩性				Cr			Ni			Co				V			Rb				Sr			Ba					Sc			Nb				Ta			Li			Zr				Hf				U		Th			W			Sn			Cu			Pb			Zn			Au
PM12-2-Q	玄武岩				413.00			69.05			43.68				249.20			13.47				207.40			127.00					22.37			8.25				0.92			117.20			223.00				1.87				0.58		3.83			2.44			1.96			24.73			9.45			102.60			1.47
PM12-7-Q					329.90			53.24			34.76				246.10			16.57				146.80			87.72					20.27			9.52				1.26			100.10			217.00				1.73				0.61		3.70			3.67			1.56			22.41			4.33			99.47			0.54
PM12-13-Q					317.50			60.72			41.36				255.80			14.28				127.50			44.41					22.20			11.81				1.30			123.20			231.00				2.72				0.72		4.05			2.78			1.70			30.25			7.62			108.10			0.54
PM18-6-Q1	玄武岩				172.10			93.33			40.25				301.70			45.47				383.20			262.40					28.41			16.16				1.37			16.42			274.00				4.96				0.67		2.70			5.84			2.40			60.80			7.33			143.60			0.57
PM18-10-Q1	玄武岩				46.16			30.20			36.95				272.60			50.71				430.90			370.50					25.06			34.84				2.48			17.70			322.00				7.06				0.87		3.97			17.73			2.50			53.15			9.21			151.50			0.64
PM18-3-Q1	英安岩				11.35			7.77			13.26				46.03			161.30				149.50			643.10					11.00			23.03				1.56			27.81			525.00				4.61				3.74		29.09			79.69			5.27			14.96			25.65			56.07			0.78
PM18-4-Q1					13.47			8.38			14.54				47.56			164.40				124.40			645.40					11.95			24.38				2.14			27.06			497.00				4.77				3.78		29.83			84.24			5.03			14.63			21.60			41.97			0.73
PM18-7-Q1					28.15			8.75			13.10				52.88			159.80				180.60			978.30					12.54			22.74				1.47			23.27			487.00				4.38				3.49		28.28			75.43			5.06			14.06			20.44			42.82			0.61
PM18-8-Q1					16.39			9.84			16.79				54.13			79.22				165.30			479.20					11.99			25.94				1.88			16.01			526.00				2.86				3.17		29.37			96.21			5.52			19.82			25.49			71.88			0.55
PM18-9-Q1					16.66			9.12			9.88				55.74			194.30				101.80			844.80					6.51			22.26				1.52			29.56			362.00				1.98				2.71		26.64			61.52			5.19			17.28			28.69			54.80			0.61
PM18-11-Q1					20.91			9.00			10.78				57.43			65.94				91.36			717.10					11.02			22.66				1.49			24.71			300.00				1.85				2.53		30.00			47.03			6.60			14.10			22.33			68.89			0.64
PM1-100	玄武岩				66.39			52.38			60.87				344.40			30.49				573.70			3399.00					24.08			65.02				7.62			13.28			388.15				18.26				1.06		4.39			3.71			3.78			43.29			17.12			131.40			0.66
PM1-101					30.58			20.49			52.24				243.10			13.19				505.80			372.90					23.02			29.19				3.46			28.32			319.70				10.99				0.70		2.86			18.18			7.57			42.35			27.54			149.80			0.75
PM22-102					43.24			33.64			54.94				287.60			4.04				245.00			634.50					24.04			22.03				2.59			19.29			283.59				10.36				0.60		2.40			1.62			2.21			23.19			17.02			123.70			0.57
PM22-103					91.56			60.88			50.10				268.10			14.87				612.00			2552.00					20.68			36.46				4.47			26.52			395.19				17.06				0.82		3.49			3.99			2.47			33.51			27.00			108.00			0.71
PM22-104					53.09			32.26			48.63				277.60			15.68				128.40			356.10					21.19			36.49				4.92			21.60			396.30				13.77				0.80		4.08			5.15			2.54			17.51			15.58			122.40			0.79
样品编号	岩性				Y					La				Ce					Pr					Nd					Sm					Eu				Gd						Tb				Dy				Ho					Er			Tm				Yb						Lu
PM12-2-Q	玄武岩				38.86					22.57				046.68					06.61					29.67					07.16					1.69				06.21						1.13				06.41				1.43					3.10			0.48				2.23						0.33
PM12-7-Q					40.19					22.72				046.89					06.61					29.61					07.28					2.10				06.30						1.18				06.80				1.48					3.11			0.50				2.37						0.33
PM12-13-Q					40.69					23.76				049.91					06.93					31.49					07.47					2.24				06.65						1.18				06.69				1.50					3.26			0.51				2.36						0.35
PM18-6-Q1	玄武岩				45.23					27.17				058.28					08.59					39.55					09.89					3.12				08.65						1.60				09.14				1.86					4.79			0.76				3.96						0.61
PM18-10-Q1	玄武岩				45.76					38.28				077.10					10.74					47.38					11.07					3.61				09.35						1.68				09.46				1.91					5.01			0.78				4.03						0.65
PM18-3-Q1	英安岩				55.48					88.21				163.89					18.88					71.58					13.74					2.46				11.70						1.96				10.70				2.23					6.26			1.05				5.86						0.96
PM18-4-Q1					56.86					84.56				152.14					18.76					71.10					13.55					2.42				11.38						1.87				10.46				2.26					6.29			1.05				5.98						0.99
PM18-7-Q1					56.26					88.42				158.89					19.45					73.55					13.97					2.65				11.89						1.95				10.72				2.22					6.16			1.04				5.66						0.95
PM18-8-Q1					54.73					93.11				166.56					20.68					79.42					15.36					2.71				12.84						2.06				10.76				2.22					5.94			0.94				5.18						0.82
PM18-9-Q1					41.67					71.16				129.86					15.88					59.89					11.81					2.06				09.76						1.62				08.34				1.67					4.59			0.68				3.84						0.60
PM18-11-Q1					36.95					91.24				162.47					19.63					73.82					13.72					2.55				11.24						1.64				07.96				1.56					3.99			0.57				3.04						0.51
样品编号				岩性			Y					La					Ce				Pr						Nd				Sm					Eu					Gd				Tb					Dy				Ho				Er					Tm				Yb				Lu
PM1-100				玄武岩			50.26					47.05					98.01				13.30						57.43				12.51					6.09					10.79				1.89					10.71				2.06				5.43					0.78				4.27				0.62
PM1-101							36.06					25.49					55.78				7.94						36.04				8.34					2.67					7.20				1.32					7.64				1.48				3.87					0.52				2.83				0.42
PM22-102							33.59					23.70					52.80				7.80						35.26				8.42					2.72					7.08				1.27					7.06				1.35				3.55					0.49				2.62				0.39
PM22-103							39.39					32.90					70.63				9.80						43.80				10.05					4.53					8.27				1.47					8.50				1.68				4.29					0.62				3.41				0.52
PM22-104							35.04					43.31					90.33				11.71						49.92				10.90					3.42					8.82				1.49					7.86				1.49				3.84					0.56				2.98				0.42
样品编号			岩性				ΣREE					LREE					HREE				LREE/HREE										La_N/Yb_N										Ce_N/Yb_N									La_N/Sm_N								Gd_N/Yb_N									Eu^*				Ce^*
PM12-2-Q				玄武岩			135.68					114.37					21.31				5.37										7.25										5.81									2.03								2.30									0.77				0.94
PM12-7-Q							137.28					115.22					22.07				5.22										6.88										5.50									2.01								2.20									0.95				0.94
PM12-13-Q							144.31					121.81					22.50				5.41										7.21										5.87									2.05								2.33									0.97				0.95
PM18-6-Q1				玄武岩			177.97					146.60					31.37				4.67										4.92										4.09									1.77								1.81									1.03				0.94
PM18-10-Q1				玄武岩			221.05					188.18					32.87				5.72										6.81										5.31									2.23								1.92									1.08				0.93
PM18-3-Q1				英安岩			399.48					358.76					40.72				8.81										10.8										7.77									4.14								1.65									0.59				0.98
PM18-4-Q1							382.81					342.53					40.28				8.50										10.14										7.07									4.03								1.57									0.60				0.94
PM18-7-Q1							397.52					356.93					40.59				8.79										11.21										7.80									4.09								1.74									0.63				0.94
PM18-8-Q1							418.60					377.84					40.76				9.27										12.89										8.93									3.91								2.05									0.59				0.93
PM18-9-Q1							321.76					290.66					31.10				9.35										13.29										9.39									3.89								2.10									0.59				0.95
PM18-11-Q1							393.94					363.43					30.51				11.91										21.53										14.85									4.29								3.06									0.63				0.94
PM1-100				玄武岩			270.94					234.39					36.55				6.41										7.90										6.37									2.42								2.09									1.60				0.96
PM1-101							161.54					136.26					25.28				5.39										6.46										5.47									1.97								2.10									1.05				0.96
PM22-102							154.51					130.70					23.81				5.49										6.49										5.59									1.81								2.23									1.08				0.95
PM22-103							200.47					171.71					28.76				5.97										6.92										5.75									2.11								2.01									1.52				0.96
PM22-104							237.05					209.59					27.46				7.63										10.42										8.42									2.56								2.44									1.07				0.98