Zircon U-Pb geochronology and geochemistry of the Kekebieketi basic complex in Fuyun, Xinjiang and the geological significance

doi:10.13745/j.esf.sf.2019.9.3

Abstract

Abstract:

The Kekebieketi basic complex is located in the south of Xinjiang Erqisi metallogenic belt. The copper-nickel ore body was discovered in 2016, with good metallogenic potential. In this paper, we report the petrographic, geochemical and chronological characteristics of the complex in order to understand its formation age, tectonic environment and petrogenesis. The complex is mainly controlled by NW and NWW trending structures. The main petrofacies are hornblende pyroxenite, gabbro and a few diorite. Hornblende pyroxenite is mainly ore-bearing facies, and the pyrite and chalcopyrite are stellate, veined and disseminated. The complex had a magnesia ferro ratio between 0.8 and 2.0, containing mainly iron basalts. Trace elements results showed that the complex is depleted in compatible (Cr, Co, Ni) and high field strength (Nb, Ta, Zr, Hf, Th) elements, and enriched in large-ion lithophile element (Ba, U, K, Pb, Sr) elements. The total rare earth elements (ΣREE) content was (29.77-148.02)×10^-6 and decreased with increasing basicity. The distribution patterns of REE in each petrofacies were roughly parallel, and fractionation between light and heavy REE showed strong right leaning. Sulfur isotope δ³⁴S of sulfide varied from -0.6‰ to -0.4‰, with typical mantle-sourced sulfur characteristics. The results of La-ICP-MS U-Pb dating of zircon showed that the ages of Kekebieketi gabbro and diorite were 330.3±0.7 and 328.9±0.6 Ma, respectively. Combined with the regional geological background, we considered the magmatic emplacement and crystallization occurred in the mid- and late-stage of the Early Carboniferous in a post-collisional extension setting. In addition, we speculated that the Kekebieketi basic complex is the product of moderately evolving magma, and it may have experienced fractional crystallization of olivine in the deep magma chamber. After that, the middle and upper magma rose and experienced fractional crystallization of orthopyroxene. At the same time, the addition of silicon in the upper crust led to magmatic sulfur saturation to form chalcopyrite.

Key words: zircon U-Pb age, petrogeochemistry, basic complex, petrogenesis, Xinjiang, Kekebieketi

CLC Number:

PEI Shengliang, DING Rufu, SHAN Lihua, YANG Wusheng. Zircon U-Pb geochronology and geochemistry of the Kekebieketi basic complex in Fuyun, Xinjiang and the geological significance[J]. Earth Science Frontiers, 2020, 27(4): 184-198.

Figures/Tables 16

References 72

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分析点号	w_B/10^-6		Th/U	同位素比值及误差						年龄及误差/Ma
分析点号	Th	U	Th/U	²⁰⁷Pb/ ²⁰⁶Pb	1σ	²⁰⁷Pb/ ²³⁵U	1σ	²⁰⁶Pb/ ²³⁸U	1σ	²⁰⁷Pb/ ²⁰⁶Pb	1σ	²⁰⁷Pb/ ²³⁵U	1σ	²⁰⁶Pb/ ²³⁸U	1σ
N1-02	150.8	218.0	0.69	0.052 3	0.001 3	0.378 7	0.009 5	0.052 5	0.000 4	298.2	55.6	326.1	7.0	330.0	2.5
N1-04	429.2	443.5	0.97	0.054 0	0.000 9	0.392 8	0.006 8	0.052 6	0.000 4	372.3	32.4	336.4	5.0	330.6	2.5
N1-07	196.9	271.6	0.73	0.055 4	0.001 3	0.401 2	0.009 9	0.052 4	0.000 5	427.8	53.7	342.5	7.1	329.1	2.9
N1-08	202.0	268.8	0.75	0.053 4	0.001 1	0.387 0	0.008 6	0.052 5	0.000 5	346.4	48.1	332.2	6.3	330.0	3.2
N1-09	315.2	406.1	0.78	0.054 2	0.001 1	0.395 3	0.007 7	0.052 8	0.000 4	376.0	44.4	338.2	5.6	331.7	2.4
N1-12	326.5	368.8	0.89	0.054 0	0.001 0	0.391 3	0.007 4	0.052 5	0.000 4	372.3	42.6	335.3	5.4	329.9	2.4
N1-13	156.5	221.0	0.71	0.055 3	0.001 3	0.397 3	0.009 6	0.052 0	0.000 5	433.4	51.8	339.7	7.0	327.0	2.9
N1-14	125.6	188.5	0.67	0.054 9	0.001 4	0.394 5	0.010 5	0.052 2	0.000 5	409.3	57.4	337.7	7.6	327.8	2.8
N1-16	163.7	248.2	0.66	0.053 2	0.001 1	0.387 4	0.007 8	0.053 0	0.000 4	344.5	41.7	332.5	5.7	332.8	2.4
N1-17	199.7	300.8	0.66	0.053 1	0.001 0	0.385 2	0.007 3	0.052 6	0.000 4	344.5	38.0	330.8	5.4	330.6	2.6
N1-19	315.3	381.3	0.83	0.052 3	0.000 9	0.380 5	0.006 8	0.052 9	0.000 5	298.2	43.5	327.4	5.0	332.3	2.9
N1-20	401.4	437.3	0.92	0.052 7	0.000 9	0.380 7	0.006 2	0.052 5	0.000 3	322.3	37.0	327.5	4.5	329.6	2.1
N2-01	511.6	696.1	0.74	0.052 6	0.000 7	0.377 9	0.005 4	0.052 2	0.000 4	309.3	33.3	325.5	4.0	327.9	2.5
N2-02	588.9	716.3	0.82	0.053 3	0.000 8	0.391 3	0.005 9	0.053 1	0.000 3	342.7	39.8	335.3	4.3	333.7	1.9
N2-03	423.0	532.9	0.79	0.051 6	0.000 8	0.372 6	0.005 6	0.052 4	0.000 3	333.4	35.2	321.6	4.1	329.2	2.1
N2-04	598.3	656.3	0.91	0.053 3	0.000 7	0.382 6	0.005 2	0.051 9	0.000 3	338.9	23.1	329.0	3.8	326.2	2.1
N2-05	367.0	564.3	0.65	0.052 9	0.000 8	0.384 3	0.006 5	0.052 6	0.000 5	324.1	33.3	330.2	4.8	330.3	2.8
N2-08	200.5	369.4	0.54	0.052 5	0.001 0	0.378 8	0.006 8	0.052 5	0.000 4	305.6	40.7	326.2	5.0	329.6	2.4
N2-10	416.0	625.9	0.66	0.052 1	0.000 7	0.376 5	0.005 5	0.052 3	0.000 4	300.1	33.3	324.4	4.1	328.8	2.3
N2-12	223.7	432.1	0.52	0.053 4	0.000 9	0.385 5	0.007 5	0.052 2	0.000 5	346.4	37.0	331.1	5.5	328.1	3.4
N2-13	360.4	471.7	0.76	0.053 8	0.000 9	0.389 5	0.006 5	0.052 5	0.000 4	364.9	69.4	334.0	4.7	329.8	2.3
N2-14	308.9	407.5	0.76	0.053 8	0.001 3	0.389 2	0.009 9	0.052 2	0.000 4	361.2	55.6	333.8	7.3	327.9	2.2
N2-15	296.8	500.6	0.59	0.054 1	0.000 9	0.391 1	0.007 0	0.052 1	0.000 4	376.0	37.0	335.2	5.1	327.5	2.4
N2-16	98.5	254.5	0.39	0.051 9	0.001 2	0.377 0	0.008 9	0.052 6	0.000 5	279.7	50.0	324.8	6.6	330.6	3.2
N2-19	174.3	351.4	0.50	0.053 1	0.001 0	0.382 2	0.007 6	0.052 3	0.000 4	331.5	44.4	328.7	5.6	328.8	2.4
N2-20	314.6	525.7	0.60	0.053 8	0.000 8	0.383 8	0.006 3	0.051 7	0.000 4	364.9	35.2	329.8	4.6	324.8	2.4
N2-21	459.1	603.1	0.76	0.052 2	0.000 8	0.378 9	0.005 9	0.052 5	0.000 3	294.5	33.3	326.2	4.3	329.7	2.1
N2-22	467.3	616.8	0.76	0.053 5	0.000 8	0.386 4	0.006 1	0.052 3	0.000 4	350.1	30.6	331.8	4.5	328.4	2.2

分析点号	w_B/10^-6		Th/U	同位素比值及误差						年龄及误差/Ma
分析点号	Th	U	Th/U	²⁰⁷Pb/ ²⁰⁶Pb	1σ	²⁰⁷Pb/ ²³⁵U	1σ	²⁰⁶Pb/ ²³⁸U	1σ	²⁰⁷Pb/ ²⁰⁶Pb	1σ	²⁰⁷Pb/ ²³⁵U	1σ	²⁰⁶Pb/ ²³⁸U	1σ
N1-02	150.8	218.0	0.69	0.052 3	0.001 3	0.378 7	0.009 5	0.052 5	0.000 4	298.2	55.6	326.1	7.0	330.0	2.5
N1-04	429.2	443.5	0.97	0.054 0	0.000 9	0.392 8	0.006 8	0.052 6	0.000 4	372.3	32.4	336.4	5.0	330.6	2.5
N1-07	196.9	271.6	0.73	0.055 4	0.001 3	0.401 2	0.009 9	0.052 4	0.000 5	427.8	53.7	342.5	7.1	329.1	2.9
N1-08	202.0	268.8	0.75	0.053 4	0.001 1	0.387 0	0.008 6	0.052 5	0.000 5	346.4	48.1	332.2	6.3	330.0	3.2
N1-09	315.2	406.1	0.78	0.054 2	0.001 1	0.395 3	0.007 7	0.052 8	0.000 4	376.0	44.4	338.2	5.6	331.7	2.4
N1-12	326.5	368.8	0.89	0.054 0	0.001 0	0.391 3	0.007 4	0.052 5	0.000 4	372.3	42.6	335.3	5.4	329.9	2.4
N1-13	156.5	221.0	0.71	0.055 3	0.001 3	0.397 3	0.009 6	0.052 0	0.000 5	433.4	51.8	339.7	7.0	327.0	2.9
N1-14	125.6	188.5	0.67	0.054 9	0.001 4	0.394 5	0.010 5	0.052 2	0.000 5	409.3	57.4	337.7	7.6	327.8	2.8
N1-16	163.7	248.2	0.66	0.053 2	0.001 1	0.387 4	0.007 8	0.053 0	0.000 4	344.5	41.7	332.5	5.7	332.8	2.4
N1-17	199.7	300.8	0.66	0.053 1	0.001 0	0.385 2	0.007 3	0.052 6	0.000 4	344.5	38.0	330.8	5.4	330.6	2.6
N1-19	315.3	381.3	0.83	0.052 3	0.000 9	0.380 5	0.006 8	0.052 9	0.000 5	298.2	43.5	327.4	5.0	332.3	2.9
N1-20	401.4	437.3	0.92	0.052 7	0.000 9	0.380 7	0.006 2	0.052 5	0.000 3	322.3	37.0	327.5	4.5	329.6	2.1
N2-01	511.6	696.1	0.74	0.052 6	0.000 7	0.377 9	0.005 4	0.052 2	0.000 4	309.3	33.3	325.5	4.0	327.9	2.5
N2-02	588.9	716.3	0.82	0.053 3	0.000 8	0.391 3	0.005 9	0.053 1	0.000 3	342.7	39.8	335.3	4.3	333.7	1.9
N2-03	423.0	532.9	0.79	0.051 6	0.000 8	0.372 6	0.005 6	0.052 4	0.000 3	333.4	35.2	321.6	4.1	329.2	2.1
N2-04	598.3	656.3	0.91	0.053 3	0.000 7	0.382 6	0.005 2	0.051 9	0.000 3	338.9	23.1	329.0	3.8	326.2	2.1
N2-05	367.0	564.3	0.65	0.052 9	0.000 8	0.384 3	0.006 5	0.052 6	0.000 5	324.1	33.3	330.2	4.8	330.3	2.8
N2-08	200.5	369.4	0.54	0.052 5	0.001 0	0.378 8	0.006 8	0.052 5	0.000 4	305.6	40.7	326.2	5.0	329.6	2.4
N2-10	416.0	625.9	0.66	0.052 1	0.000 7	0.376 5	0.005 5	0.052 3	0.000 4	300.1	33.3	324.4	4.1	328.8	2.3
N2-12	223.7	432.1	0.52	0.053 4	0.000 9	0.385 5	0.007 5	0.052 2	0.000 5	346.4	37.0	331.1	5.5	328.1	3.4
N2-13	360.4	471.7	0.76	0.053 8	0.000 9	0.389 5	0.006 5	0.052 5	0.000 4	364.9	69.4	334.0	4.7	329.8	2.3
N2-14	308.9	407.5	0.76	0.053 8	0.001 3	0.389 2	0.009 9	0.052 2	0.000 4	361.2	55.6	333.8	7.3	327.9	2.2
N2-15	296.8	500.6	0.59	0.054 1	0.000 9	0.391 1	0.007 0	0.052 1	0.000 4	376.0	37.0	335.2	5.1	327.5	2.4
N2-16	98.5	254.5	0.39	0.051 9	0.001 2	0.377 0	0.008 9	0.052 6	0.000 5	279.7	50.0	324.8	6.6	330.6	3.2
N2-19	174.3	351.4	0.50	0.053 1	0.001 0	0.382 2	0.007 6	0.052 3	0.000 4	331.5	44.4	328.7	5.6	328.8	2.4
N2-20	314.6	525.7	0.60	0.053 8	0.000 8	0.383 8	0.006 3	0.051 7	0.000 4	364.9	35.2	329.8	4.6	324.8	2.4
N2-21	459.1	603.1	0.76	0.052 2	0.000 8	0.378 9	0.005 9	0.052 5	0.000 3	294.5	33.3	326.2	4.3	329.7	2.1
N2-22	467.3	616.8	0.76	0.053 5	0.000 8	0.386 4	0.006 1	0.052 3	0.000 4	350.1	30.6	331.8	4.5	328.4	2.2

样品号	岩性	w_B/%																																Mg^#		m/f
样品号	岩性	SiO₂		Al₂O₃		FeOt			Fe₂O₃		FeO		MgO			CaO		Na₂O		K₂O			MnO		TiO₂		P₂O₅			LOI		Total		Mg^#		m/f
B06	辉石岩	42.81		13.80		12.69			4.10		7.73		12.96			10.44		2.18		0.54			0.15		2.05		0.049			1.74		99.40		0.67		2.00
B20		43.36		14.48		12.23			4.31		7.13		10.81			11.62		1.98		0.54			0.17		2.06		0.211			1.98		99.44		0.64		1.72
B23		40.82		13.96		15.93			7.70		7.41		11.54			10.81		2.01		0.45			0.16		2.20		0.049			1.49		99.42		0.59		1.42
B24		42.84		14.52		11.94			4.55		6.65		11.56			11.52		2.34		0.60			0.16		2.06		0.359			1.51		99.41		0.66		1.89
B25		43.11		14.10		13.20			3.94		8.33		10.78			11.64		1.83		0.54			0.19		1.94		0.224			1.88		99.43		0.62		1.59
B32		42.53		14.81		13.06			4.11		8.05		12.07			10.81		2.24		0.46			0.16		1.96		0.037			1.30		99.44		0.65		1.81
B5201-6		43.75		12.87		12.18			3.49		7.82		12.22			11.60		1.95		0.50			0.18		1.73		0.184			2.25		99.41		0.67		1.96
B5201-9		43.06		13.83		12.92			3.95		8.07		11.63			12.23		1.73		0.38			0.18		1.83		0.065			1.57		99.43		0.64		1.76
B5201-10		44.49		16.50		12.05			3.77		7.45		8.43			10.87		2.25		1.00			0.16		1.74		0.164			1.77		99.42		0.58		1.37
B18	辉长岩	46.22		18.02		11.19			3.53		6.89		6.85			9.88		2.57		0.21			0.17		0.94		0.250			3.15		99.44		0.55		1.19
B22		47.92		18.12		10.46			4.15		5.68		6.43			9.75		2.95		0.52			0.17		0.76		0.106			2.22		99.40		0.55		1.20
B29		46.50		18.38		10.27			3.42		6.16		6.96			9.96		3.04		0.81			0.16		1.26		0.273			1.81		99.42		0.57		1.32
B5201-8		47.26		17.65		10.53			2.75		7.00		7.69			9.71		2.74		0.33			0.16		1.09		0.237			2.04		99.44		0.59		1.42
B5201-15		48.07		19.57		10.13			1.95		7.36		4.53			9.48		3.71		0.36			0.18		1.21		0.195			2.00		99.44		0.47		0.87
B5201-29		44.83		19.58		11.55			2.13		8.48		5.27			10.71		2.73		0.78			0.19		1.52		0.380			1.88		99.42		0.47		0.89
B17	闪长岩	53.89		18.08		8.16			3.48		4.21		3.77			7.16		3.44		1.44			0.15		0.82		0.282			2.26		99.45		0.48		0.90
B30		53.83		18.42		8.05			3.78		3.84		3.31			7.41		3.91		0.81			0.14		0.82		0.312			2.42		99.43		0.45		0.80
B31		53.61		18.59		8.04			3.54		4.05		3.72			7.26		3.99		1.21			0.15		0.83		0.305			1.72		99.42		0.48		0.90
B34		49.34		18.65		8.21			1.64		5.91		5.06			8.67		3.71		1.58			0.14		1.35		0.236			2.48		99.42		0.55		1.20
样品号	岩性	w_B/10^-6																										LREE/ HREE			(La/ Yb)_N		(La/ Sm)_N		(Gd/ Lu)_N	δEu
样品号	岩性	La	Ce		Pr		Nd	Sm		Eu		Gd		Tb	Dy		Ho		Er		Tm	Yb		Lu		ΣREE		LREE/ HREE			(La/ Yb)_N		(La/ Sm)_N		(Gd/ Lu)_N	δEu
B06	辉石岩	4.01	11.5		2.20		12.6	3.78		1.12		3.5		0.73	4.45		0.87		2.27		0.37	2.20		0.30		49.90		2.40			1.31		0.68		1.44	0.93
B20		5.10	15.1		3.11		18.5	5.72		1.52		5.1		1.04	6.24		1.25		3.19		0.52	3.00		0.41		69.80		2.36			1.22		0.58		1.53	0.84
B23		3.50	11.2		2.34		14.0	4.42		1.28		3.93		0.81	4.75		0.90		2.31		0.36	2.12		0.28		52.19		2.38			1.18		0.51		1.77	0.92
B24		5.66	16.7		3.22		18.4	5.19		1.42		4.55		0.94	5.42		1.08		2.79		0.46	2.71		0.38		68.91		2.76			1.50		0.70		1.49	0.87
B25		4.54	14.1		2.85		17.2	5.3		1.42		4.84		1.00	5.98		1.18		3.06		0.51	2.90		0.40		65.28		2.29			1.12		0.55		1.51	0.84
B32		3.56	11.4		2.34		13.8	4.25		1.27		3.67		0.73	4.23		0.80		2.01		0.34	1.99		0.26		50.65		2.61			1.28		0.54		1.72	0.96
B5201-6		4.55	13.4		2.51		14.3	4.23		1.23		3.82		0.78	4.64		0.90		2.35		0.39	2.29		0.31		55.70		2.60			1.43		0.69		1.55	0.92
B5201-9		3.67	12.4		2.62		15.8	4.87		1.36		4.40		0.90	5.32		1.04		2.69		0.44	2.53		0.35		58.39		2.30			1.04		0.49		1.57	0.88
B5201-10		8.82	25.1		4.48		23.8	6.3		1.46		5.33		1.07	6.20		1.21		3.16		0.53	3.11		0.41		90.98		3.33			2.03		0.90		1.59	0.75
B18	辉长岩	3.59	8.61		1.41		7.37	1.89		0.768		1.66		0.32	1.78		0.35		0.903		0.15	0.853		0.12		29.77			3.86		3.02		1.23		1.72	1.30
B22		4.07	8.92		1.39		7.10	1.79		0.746		1.57		0.31	1.76		0.34		0.891		0.15	0.944		0.14		30.12			3.94		3.09		1.47		1.44	1.33
B29		8.81	22.5		3.89		20.0	4.94		1.41		4.14		0.78	4.37		0.85		2.28		0.37	2.22		0.30		76.86			4.02		2.85		1.15		1.70	0.93
B5201-8		6.02	14.6		2.43		12.5	3.04		1.03		2.70		0.52	2.98		0.58		1.51		0.25	1.47		0.21		49.84			3.88		2.94		1.28		1.62	1.08
B5201-15		6.63	14.7		2.30		11.3	2.91		1.16		2.80		0.56	3.39		0.72		1.96		0.35	2.09		0.31		51.17			3.20		2.28		1.47		1.13	1.23
B5201-29		14.8	38.3		6.80		35.9	10.0		2.72		9.25		1.92	11.8		2.32		6.20		1.04	6.12		0.85		148.02			2.75		1.73		0.96		1.34	0.85
B17	闪长岩	13.3	28.0		4.01		17.9	3.88		1.18		3.37		0.62	3.37		0.66		1.82		0.32	1.95		0.27		80.66			5.51		4.89		2.21		1.54	0.97
B30		13.8	28.1		3.98		18.1	3.83		1.17		3.40		0.63	3.49		0.70		1.96		0.34	2.08		0.29		81.87			5.35		4.76		2.33		1.45	0.97
B31		16.5	33.3		4.53		20.0	4.09		1.22		3.55		0.64	3.53		0.69		1.95		0.33	2.02		0.29		92.64			6.13		5.86		2.60		1.54	0.96
B34		11.5	24.7		3.78		18.2	4.48		1.47		3.97		0.76	4.48		0.89		2.40		0.41	2.44		0.35		79.83			4.09		3.38		1.66		1.42	1.04

样品号	岩性	w_B/%																																Mg^#		m/f
样品号	岩性	SiO₂		Al₂O₃		FeOt			Fe₂O₃		FeO		MgO			CaO		Na₂O		K₂O			MnO		TiO₂		P₂O₅			LOI		Total		Mg^#		m/f
B06	辉石岩	42.81		13.80		12.69			4.10		7.73		12.96			10.44		2.18		0.54			0.15		2.05		0.049			1.74		99.40		0.67		2.00
B20		43.36		14.48		12.23			4.31		7.13		10.81			11.62		1.98		0.54			0.17		2.06		0.211			1.98		99.44		0.64		1.72
B23		40.82		13.96		15.93			7.70		7.41		11.54			10.81		2.01		0.45			0.16		2.20		0.049			1.49		99.42		0.59		1.42
B24		42.84		14.52		11.94			4.55		6.65		11.56			11.52		2.34		0.60			0.16		2.06		0.359			1.51		99.41		0.66		1.89
B25		43.11		14.10		13.20			3.94		8.33		10.78			11.64		1.83		0.54			0.19		1.94		0.224			1.88		99.43		0.62		1.59
B32		42.53		14.81		13.06			4.11		8.05		12.07			10.81		2.24		0.46			0.16		1.96		0.037			1.30		99.44		0.65		1.81
B5201-6		43.75		12.87		12.18			3.49		7.82		12.22			11.60		1.95		0.50			0.18		1.73		0.184			2.25		99.41		0.67		1.96
B5201-9		43.06		13.83		12.92			3.95		8.07		11.63			12.23		1.73		0.38			0.18		1.83		0.065			1.57		99.43		0.64		1.76
B5201-10		44.49		16.50		12.05			3.77		7.45		8.43			10.87		2.25		1.00			0.16		1.74		0.164			1.77		99.42		0.58		1.37
B18	辉长岩	46.22		18.02		11.19			3.53		6.89		6.85			9.88		2.57		0.21			0.17		0.94		0.250			3.15		99.44		0.55		1.19
B22		47.92		18.12		10.46			4.15		5.68		6.43			9.75		2.95		0.52			0.17		0.76		0.106			2.22		99.40		0.55		1.20
B29		46.50		18.38		10.27			3.42		6.16		6.96			9.96		3.04		0.81			0.16		1.26		0.273			1.81		99.42		0.57		1.32
B5201-8		47.26		17.65		10.53			2.75		7.00		7.69			9.71		2.74		0.33			0.16		1.09		0.237			2.04		99.44		0.59		1.42
B5201-15		48.07		19.57		10.13			1.95		7.36		4.53			9.48		3.71		0.36			0.18		1.21		0.195			2.00		99.44		0.47		0.87
B5201-29		44.83		19.58		11.55			2.13		8.48		5.27			10.71		2.73		0.78			0.19		1.52		0.380			1.88		99.42		0.47		0.89
B17	闪长岩	53.89		18.08		8.16			3.48		4.21		3.77			7.16		3.44		1.44			0.15		0.82		0.282			2.26		99.45		0.48		0.90
B30		53.83		18.42		8.05			3.78		3.84		3.31			7.41		3.91		0.81			0.14		0.82		0.312			2.42		99.43		0.45		0.80
B31		53.61		18.59		8.04			3.54		4.05		3.72			7.26		3.99		1.21			0.15		0.83		0.305			1.72		99.42		0.48		0.90
B34		49.34		18.65		8.21			1.64		5.91		5.06			8.67		3.71		1.58			0.14		1.35		0.236			2.48		99.42		0.55		1.20
样品号	岩性	w_B/10^-6																										LREE/ HREE			(La/ Yb)_N		(La/ Sm)_N		(Gd/ Lu)_N	δEu
样品号	岩性	La	Ce		Pr		Nd	Sm		Eu		Gd		Tb	Dy		Ho		Er		Tm	Yb		Lu		ΣREE		LREE/ HREE			(La/ Yb)_N		(La/ Sm)_N		(Gd/ Lu)_N	δEu
B06	辉石岩	4.01	11.5		2.20		12.6	3.78		1.12		3.5		0.73	4.45		0.87		2.27		0.37	2.20		0.30		49.90		2.40			1.31		0.68		1.44	0.93
B20		5.10	15.1		3.11		18.5	5.72		1.52		5.1		1.04	6.24		1.25		3.19		0.52	3.00		0.41		69.80		2.36			1.22		0.58		1.53	0.84
B23		3.50	11.2		2.34		14.0	4.42		1.28		3.93		0.81	4.75		0.90		2.31		0.36	2.12		0.28		52.19		2.38			1.18		0.51		1.77	0.92
B24		5.66	16.7		3.22		18.4	5.19		1.42		4.55		0.94	5.42		1.08		2.79		0.46	2.71		0.38		68.91		2.76			1.50		0.70		1.49	0.87
B25		4.54	14.1		2.85		17.2	5.3		1.42		4.84		1.00	5.98		1.18		3.06		0.51	2.90		0.40		65.28		2.29			1.12		0.55		1.51	0.84
B32		3.56	11.4		2.34		13.8	4.25		1.27		3.67		0.73	4.23		0.80		2.01		0.34	1.99		0.26		50.65		2.61			1.28		0.54		1.72	0.96
B5201-6		4.55	13.4		2.51		14.3	4.23		1.23		3.82		0.78	4.64		0.90		2.35		0.39	2.29		0.31		55.70		2.60			1.43		0.69		1.55	0.92
B5201-9		3.67	12.4		2.62		15.8	4.87		1.36		4.40		0.90	5.32		1.04		2.69		0.44	2.53		0.35		58.39		2.30			1.04		0.49		1.57	0.88
B5201-10		8.82	25.1		4.48		23.8	6.3		1.46		5.33		1.07	6.20		1.21		3.16		0.53	3.11		0.41		90.98		3.33			2.03		0.90		1.59	0.75
B18	辉长岩	3.59	8.61		1.41		7.37	1.89		0.768		1.66		0.32	1.78		0.35		0.903		0.15	0.853		0.12		29.77			3.86		3.02		1.23		1.72	1.30
B22		4.07	8.92		1.39		7.10	1.79		0.746		1.57		0.31	1.76		0.34		0.891		0.15	0.944		0.14		30.12			3.94		3.09		1.47		1.44	1.33
B29		8.81	22.5		3.89		20.0	4.94		1.41		4.14		0.78	4.37		0.85		2.28		0.37	2.22		0.30		76.86			4.02		2.85		1.15		1.70	0.93
B5201-8		6.02	14.6		2.43		12.5	3.04		1.03		2.70		0.52	2.98		0.58		1.51		0.25	1.47		0.21		49.84			3.88		2.94		1.28		1.62	1.08
B5201-15		6.63	14.7		2.30		11.3	2.91		1.16		2.80		0.56	3.39		0.72		1.96		0.35	2.09		0.31		51.17			3.20		2.28		1.47		1.13	1.23
B5201-29		14.8	38.3		6.80		35.9	10.0		2.72		9.25		1.92	11.8		2.32		6.20		1.04	6.12		0.85		148.02			2.75		1.73		0.96		1.34	0.85
B17	闪长岩	13.3	28.0		4.01		17.9	3.88		1.18		3.37		0.62	3.37		0.66		1.82		0.32	1.95		0.27		80.66			5.51		4.89		2.21		1.54	0.97
B30		13.8	28.1		3.98		18.1	3.83		1.17		3.40		0.63	3.49		0.70		1.96		0.34	2.08		0.29		81.87			5.35		4.76		2.33		1.45	0.97
B31		16.5	33.3		4.53		20.0	4.09		1.22		3.55		0.64	3.53		0.69		1.95		0.33	2.02		0.29		92.64			6.13		5.86		2.60		1.54	0.96
B34		11.5	24.7		3.78		18.2	4.48		1.47		3.97		0.76	4.48		0.89		2.40		0.41	2.44		0.35		79.83			4.09		3.38		1.66		1.42	1.04

样品号	岩性	w_B/10^-6
样品号	岩性	Li	Be	Sc	V	Cr	Co	Ni	Cu	Zn	Ga	Rb	Sr	Y	Mo	Cd	In	Sb	Cs	Ba	W	Tl	Pb	Bi	Th	U	Nb	Ta	Zr	Hf
B06	辉石岩	8.45	0.30	101	575	132	69.2	111	128	95.9	14.9	3.16	387	22.7	0.85	0.11	0.11	0.22	0.11	113	0.19	0.02	6.34	0.03	0.42	1.20	2.34	0.51	31.2	1.83
B20		6.34	0.38	89.7	470	280	51.5	78.3	133	98.9	17.0	4.36	581	32.5	1.09	0.15	0.13	0.33	0.15	139	0.20	0.03	12.2	0.03	0.56	0.840	3.74	0.35	30.3	1.70
B23		5.32	0.31	69.2	584	220	69.1	74.1	127	112	19.5	2.54	520	23.9	0.54	0.09	0.12	0.23	0.12	91.8	0.14	0.02	3.39	0.02	0.27	0.477	3.26	0.24	27.8	1.57
B24		5.21	0.36	96.0	510	373	53.4	81.8	38.4	99.8	17.3	3.96	567	28.3	1.01	0.12	0.12	0.26	0.14	141	0.16	0.02	4.38	0.02	0.29	0.280	3.66	0.26	33.3	1.84
B25		6.19	0.38	85.0	483	282	53.9	74.1	156	107	17.1	4.05	580	30.8	0.48	0.14	0.12	0.34	0.17	141	0.14	0.02	4.07	0.01	0.20	0.342	4.16	0.42	26.6	1.54
B32		5.08	0.34	71.0	498	764	65.1	179	182	99.7	17.7	2.40	558	21.4	0.87	0.10	0.11	0.19	0.09	102	0.11	0.02	2.15	0.01	0.24	0.264	2.72	0.18	26.4	1.49
B5201-6		9.64	0.40	85.5	448	222	50.3	68.4	19.4	97.4	14.9	3.57	398	24.1	0.83	0.11	0.11	0.43	0.14	114	0.16	0.02	3.49	0.01	0.35	0.222	2.67	0.17	31.1	1.61
B5201-9		3.75	0.30	73.9	461	177	53.9	57.6	74.6	94.7	16.9	1.94	495	27.7	0.99	0.12	0.12	0.18	0.08	91.3	0.15	0.01	9.04	0.02	0.22	0.180	3.31	0.21	29.5	1.66
B5201-10		6.57	0.62	60.7	471	120	46.0	51.2	150	105	20.8	9.81	782	32.3	1.00	0.13	0.12	0.33	0.24	230	0.16	0.05	7.88	0.02	0.39	0.640	6.95	0.39	54.4	2.99
B18	辉长岩	10.5	0.28	26.4	317	127	40.6	49.7	74.0	106	19.5	2.78	1 013	9.01	0.55	0.14	0.05	0.88	0.15	100	0.14	0.02	5.32	0.03	0.25	0.366	0.85	0.24	8.73	0.47
B22		7.84	0.37	25.0	288	136	36.9	44.7	123	97.2	19.2	5.81	929	9.00	0.76	0.11	0.05	0.69	0.20	139	0.13	0.04	6.57	0.02	0.47	0.381	1.33	0.14	21.3	0.99
B29		8.43	0.60	30.9	302	193	34.5	61.9	56.8	98.9	20.9	7.39	1 074	23.2	0.25	0.13	0.08	0.19	0.26	229	0.10	0.04	4.07	0.02	0.33	0.500	4.56	0.26	31.3	1.58
B5201-8		8.74	0.44	34.7	325	162	40.9	60.7	86.5	96.2	18.8	3.86	874	15.2	1.00	0.13	0.07	0.37	0.23	123	0.21	0.02	6.46	0.02	0.27	0.377	2.63	0.21	17.3	0.93
B5201-15		7.52	0.55	31.5	362	14.1	29.7	15.0	22.0	97.4	19.5	4.26	786	19.6	1.22	0.10	0.07	0.73	0.15	186	0.12	0.02	6.35	0.02	0.40	0.385	3.17	0.22	12.5	0.66
B5201-29		15.6	0.87	161	1 031	162	108	136	163	187	37.4	11.6	1 198	76.8	2.01	0.22	0.22	0.70	0.37	416	0.32	0.05	12.7	0.03	0.71	1.25	7.98	0.47	59.4	3.10
B17	闪长岩	7.52	0.91	19.8	198	28.8	22.2	17.0	47.9	86.7	19.2	20.0	797	18.5	1.38	0.10	0.06	0.37	0.40	426	0.17	0.11	8.48	0.02	1.41	1.16	5.24	0.55	12.4	0.96
B30		9.70	0.90	19.6	200	26.1	18.1	13.8	31.1	87.9	20.1	13.5	906	19.6	0.89	0.09	0.06	0.65	0.29	274	0.16	0.07	7.85	0.02	1.35	0.523	4.70	0.27	9.81	0.82
B31		10.4	0.96	18.4	195	31.6	20.4	16.4	46.8	92.0	19.8	17.4	904	19.6	0.64	0.10	0.06	0.15	0.36	395	0.21	0.10	6.73	0.02	1.42	0.593	6.04	0.37	13.9	1.02
B34		16.1	0.81	36.2	350	49.0	19.9	40.0	17.2	91.8	20.4	22.0	966	24.1	0.73	0.04	0.08	3.68	0.25	464	1.09	0.11	12.3	0.02	1.47	1.15	4.39	0.31	24.7	1.51